{% extends 'base.html' %}
{% load static %}

{% block title %}CSP ROI Calculator{% endblock %}

{% block extra_css %}
<link href="https://cdn.jsdelivr.net/npm/chart.js@4.4.0/dist/chart.min.css" rel="stylesheet">
<style>
.calculator-section {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.input-group-custom {
    margin-bottom: 1rem;
}

.input-group-custom label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    display: block;
}

.slider-container {
    position: relative;
    margin: 10px 0;
}

.slider {
    width: 100%;
    height: 8px;
    border-radius: 5px;
    background: #ddd;
    outline: none;
    -webkit-appearance: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #007bff;
    cursor: pointer;
}

.slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #007bff;
    cursor: pointer;
    border: none;
}

.scenario-card {
    border: 2px solid #e9ecef;
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
}

.scenario-card.active {
    border-color: #007bff;
    background-color: #f8f9ff;
}

.scenario-card.disabled {
    opacity: 0.6;
    background-color: #f8f9fa;
}

.metric-card {
    background: white;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 1rem;
}

.metric-value {
    font-size: 1.6rem;
    font-weight: bold;
    color: #007bff;
    line-height: 1.2;
    word-break: break-word;
    overflow-wrap: break-word;
}

.metric-label {
    color: #6c757d;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 0.5rem;
}

.chart-container {
    position: relative;
    height: 400px;
    background: white;
    border-radius: 8px;
    padding: 1rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 1.5rem;
}

.export-buttons {
    position: sticky;
    top: 20px;
    background: white;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 1rem;
}

.collapsible-section {
    border: 1px solid #e9ecef;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.collapsible-header {
    background: #f8f9fa;
    padding: 1rem;
    cursor: pointer;
    border-radius: 8px 8px 0 0;
    transition: background-color 0.3s ease;
}

.collapsible-header:hover {
    background: #e9ecef;
}

.collapsible-content {
    padding: 1rem;
    display: none;
}

.collapsible-content.show {
    display: block;
}

.phase-settings {
    background: #f8f9fa;
    border-radius: 6px;
    padding: 1rem;
    margin-bottom: 1rem;
}

.currency-symbol {
    font-weight: bold;
    color: #28a745;
}

.loading-spinner {
    display: none;
    text-align: center;
    padding: 2rem;
}

.help-content {
    background: #f8f9fa;
    border-radius: 6px;
    padding: 1rem;
}

.help-content h6 {
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.help-content p {
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.help-content p:last-child {
    margin-bottom: 0;
}

@media (max-width: 768px) {
    .chart-container {
        height: 300px;
    }
    
    .metric-value {
        font-size: 1.4rem;
    }
    
    .metric-card {
        padding: 1rem;
    }
}

@media (max-width: 576px) {
    .metric-value {
        font-size: 1.2rem;
    }
    
    .metric-card {
        padding: 0.75rem;
        margin-bottom: 0.75rem;
    }
}
</style>
{% endblock %}

{% block content %}
<div class="container-fluid my-4">
    <div class="row">
        <!-- Header -->
        <div class="col-12 mb-4">
            <div class="d-flex justify-content-between align-items-center">
                <div>
                    <h1 class="h2 mb-1">CSP ROI Calculator</h1>
                    <p class="text-muted">Calculate potential returns from investing in Servala platform</p>
                </div>
                <div>
                    <button type="button" class="btn btn-outline-secondary me-2" onclick="resetCalculator()">
                        <i class="bi bi-arrow-clockwise"></i> Reset
                    </button>
                    <button type="button" class="btn btn-danger" onclick="logout()">
                        <i class="bi bi-box-arrow-right"></i> Logout
                    </button>
                </div>
            </div>
        </div>
    </div>

    <div class="row">
        <!-- Input Panel -->
        <div class="col-lg-4">
            <!-- Help Section -->
            <div class="collapsible-section mb-3">
                <div class="collapsible-header" onclick="toggleCollapsible('help-section')">
                    <h5 class="mb-0">
                        <i class="bi bi-question-circle"></i> How the Calculator Works
                        <i class="bi bi-chevron-down float-end"></i>
                    </h5>
                </div>
                <div class="collapsible-content" id="help-section">
                    <div class="help-content">
                        <h6 class="text-primary mb-2"><i class="bi bi-lightbulb"></i> Calculator Overview</h6>
                        <p class="small">This ROI calculator models your investment in the Servala platform by simulating cloud service provider (CSP) business growth over time. It calculates potential returns based on instance growth, churn rates, and revenue sharing with Servala.</p>
                        
                        <h6 class="text-primary mb-2 mt-3"><i class="bi bi-gear"></i> Key Parameters</h6>
                        <div class="small">
                            <p><strong>Investment Amount:</strong> Your initial capital investment in the Servala platform and infrastructure.</p>
                            <p><strong>Monthly Revenue per Instance:</strong> The recurring revenue generated from each managed service instance (excl. compute).</p>
                            <p><strong>Servala Revenue Share:</strong> Percentage of revenue shared with Servala after the grace period. This is Servala's platform fee.</p>
                            <p><strong>Grace Period:</strong> Initial months where you keep 100% of revenue before sharing begins with Servala.</p>
                            <p><strong>Discount Rate:</strong> Used for NPV calculations - represents your required rate of return or cost of capital.</p>
                        </div>
                        
                        <h6 class="text-primary mb-2 mt-3"><i class="bi bi-graph-up"></i> Growth Scenarios</h6>
                        <div class="small">
                            <p><strong>Conservative:</strong> Steady growth with low churn (2%), suitable for established markets.</p>
                            <p><strong>Moderate:</strong> Balanced growth with moderate churn (3%), typical for competitive markets.</p>
                            <p><strong>Aggressive:</strong> Rapid expansion with higher churn (5%), for high-growth strategies.</p>
                            <p>Each scenario has 4 growth phases with customizable instance acquisition rates in Advanced Parameters.</p>
                        </div>
                        
                        <h6 class="text-primary mb-2 mt-3"><i class="bi bi-calculator"></i> What is NPV?</h6>
                        <p class="small"><strong>Net Present Value (NPV)</strong> represents the current worth of future cash flows, discounted back to today's value using your discount rate. A positive NPV indicates the investment is profitable. NPV accounts for the time value of money - money received today is worth more than the same amount received in the future.</p>
                        
                        <h6 class="text-primary mb-2 mt-3"><i class="bi bi-bullseye"></i> Understanding Results</h6>
                        <div class="small">
                            <p><strong>ROI:</strong> Return on Investment as a percentage of your initial investment.</p>
                            <p><strong>Break-even:</strong> Month when cumulative revenue equals your initial investment.</p>
                            <p><strong>NPV Break-even:</strong> Month when discounted cash flows become positive (more accurate timing).</p>
                            <p><strong>Churn:</strong> Monthly percentage of instances that stop generating revenue (customer loss).</p>
                        </div>
                    </div>
                </div>
            </div>

            <!-- Export Buttons -->
            <div class="export-buttons">
                <h5><i class="bi bi-download"></i> Export Results</h5>
                <div class="d-grid gap-2">
                    <button type="button" class="btn btn-outline-primary btn-sm" onclick="exportToPDF()">
                        <i class="bi bi-file-pdf"></i> Export PDF Report
                    </button>
                    <button type="button" class="btn btn-outline-success btn-sm" onclick="exportToCSV()">
                        <i class="bi bi-file-csv"></i> Export CSV Data
                    </button>
                </div>
            </div>

            <!-- Investment Settings -->
            <div class="calculator-section">
                <h4><i class="bi bi-cash-coin"></i> Investment Settings</h4>
                
                <div class="input-group-custom">
                    <label for="investment-amount">Investment Amount</label>
                    <div class="input-group">
                        <span class="input-group-text currency-symbol">CHF</span>
                        <input type="text" class="form-control" id="investment-amount" 
                               data-value="500000" value="500,000"
                               oninput="handleInvestmentAmountInput(this)"
                               onchange="updateCalculations()">
                    </div>
                    <div class="slider-container">
                        <input type="range" class="slider" id="investment-slider" 
                               min="100000" max="2000000" step="10000" value="500000"
                               onchange="updateInvestmentAmount(this.value)">
                    </div>
                    <small class="text-muted">CHF 100,000 - CHF 2,000,000</small>
                </div>

                <div class="input-group-custom">
                    <label for="timeframe">Investment Timeframe (Years)</label>
                    <select class="form-select" id="timeframe" onchange="updateCalculations()">
                        <option value="1">1 Year</option>
                        <option value="2">2 Years</option>
                        <option value="3" selected>3 Years</option>
                        <option value="4">4 Years</option>
                        <option value="5">5 Years</option>
                    </select>
                </div>

                <div class="input-group-custom">
                    <label for="discount-rate">Discount Rate for NPV (%)</label>
                    <input type="number" class="form-control" id="discount-rate" 
                           min="5" max="20" step="0.5" value="10"
                           onchange="updateCalculations()">
                    <div class="slider-container">
                        <input type="range" class="slider" id="discount-slider" 
                               min="5" max="20" step="0.5" value="10"
                               onchange="updateDiscountRate(this.value)">
                    </div>
                    <small class="text-muted">5% - 20%</small>
                </div>
            </div>

            <!-- Revenue Model -->
            <div class="calculator-section">
                <h4><i class="bi bi-graph-up"></i> Revenue Model</h4>
                
                <div class="input-group-custom">
                    <label for="revenue-per-instance">Monthly Revenue per Instance</label>
                    <div class="input-group">
                        <span class="input-group-text currency-symbol">CHF</span>
                        <input type="number" class="form-control" id="revenue-per-instance" 
                               min="20" max="200" step="5" value="50"
                               onchange="updateCalculations()">
                    </div>
                    <div class="slider-container">
                        <input type="range" class="slider" id="revenue-slider" 
                               min="20" max="200" step="5" value="50"
                               onchange="updateRevenuePerInstance(this.value)">
                    </div>
                    <small class="text-muted">CHF 20 - CHF 200</small>
                </div>

                <div class="input-group-custom">
                    <label for="servala-share">Servala Revenue Share (%)</label>
                    <input type="number" class="form-control" id="servala-share" 
                           min="10" max="40" step="1" value="25"
                           onchange="updateCalculations()">
                    <div class="slider-container">
                        <input type="range" class="slider" id="share-slider" 
                               min="10" max="40" step="1" value="25"
                               onchange="updateServalaShare(this.value)">
                    </div>
                    <small class="text-muted">10% - 40%</small>
                </div>

                <div class="input-group-custom">
                    <label for="grace-period">Grace Period (Months)</label>
                    <input type="number" class="form-control" id="grace-period" 
                           min="0" max="24" step="1" value="6"
                           onchange="updateCalculations()">
                    <div class="slider-container">
                        <input type="range" class="slider" id="grace-slider" 
                               min="0" max="24" step="1" value="6"
                               onchange="updateGracePeriod(this.value)">
                    </div>
                    <small class="text-muted">0 - 24 months (100% revenue to CSP)</small>
                </div>
            </div>

            <!-- Growth Scenarios -->
            <div class="calculator-section">
                <h4><i class="bi bi-speedometer2"></i> Growth Scenarios</h4>
                
                <div class="scenario-card active" id="conservative-card">
                    <div class="form-check">
                        <input class="form-check-input" type="checkbox" id="conservative-enabled" checked onchange="toggleScenario('conservative')">
                        <label class="form-check-label fw-bold" for="conservative-enabled">
                            Conservative Growth
                        </label>
                    </div>
                    <p class="small text-muted mb-2">Steady, predictable growth with minimal risk</p>
                    <small class="text-info">Churn: 2% | New instances: 50-150/month (customizable below)</small>
                </div>

                <div class="scenario-card active" id="moderate-card">
                    <div class="form-check">
                        <input class="form-check-input" type="checkbox" id="moderate-enabled" checked onchange="toggleScenario('moderate')">
                        <label class="form-check-label fw-bold" for="moderate-enabled">
                            Moderate Growth
                        </label>
                    </div>
                    <p class="small text-muted mb-2">Balanced approach with moderate risk/reward</p>
                    <small class="text-info">Churn: 3% | New instances: 100-400/month (customizable below)</small>
                </div>

                <div class="scenario-card active" id="aggressive-card">
                    <div class="form-check">
                        <input class="form-check-input" type="checkbox" id="aggressive-enabled" checked onchange="toggleScenario('aggressive')">
                        <label class="form-check-label fw-bold" for="aggressive-enabled">
                            Aggressive Growth
                        </label>
                    </div>
                    <p class="small text-muted mb-2">Rapid expansion with higher risk/reward</p>
                    <small class="text-info">Churn: 5% | New instances: 200-800/month (customizable below)</small>
                </div>

                <!-- Advanced Parameters -->
                <div class="collapsible-section">
                    <div class="collapsible-header" onclick="toggleCollapsible('advanced-params')">
                        <h6 class="mb-0">
                            <i class="bi bi-gear"></i> Advanced Parameters
                            <i class="bi bi-chevron-down float-end"></i>
                        </h6>
                    </div>
                    <div class="collapsible-content" id="advanced-params">
                        <div id="scenario-customization">
                            <p class="text-muted small mb-3">Customize growth phases and churn rates for each scenario. Changes apply immediately to calculations.</p>
                            
                            <!-- Conservative Scenario Customization -->
                            <div class="phase-settings" id="conservative-advanced" style="display: block;">
                                <h6 class="text-success mb-3"><i class="bi bi-sliders"></i> Conservative Scenario Parameters</h6>
                                
                                <div class="row mb-2">
                                    <div class="col-6">
                                        <label class="form-label small">Monthly Churn Rate (%)</label>
                                        <input type="number" class="form-control form-control-sm" id="conservative-churn" 
                                               min="0" max="10" step="0.1" value="2.0"
                                               onchange="updateScenarioChurn('conservative', this.value)">
                                    </div>
                                </div>
                                
                                <div class="row mb-2">
                                    <div class="col-6">
                                        <label class="form-label small">Phase 1 (Mo 1-6)</label>
                                        <input type="number" class="form-control form-control-sm" id="conservative-phase-0" 
                                               min="10" max="500" step="5" value="50"
                                               onchange="updateScenarioPhase('conservative', 0, this.value)">
                                        <small class="text-muted">instances/month</small>
                                    </div>
                                    <div class="col-6">
                                        <label class="form-label small">Phase 2 (Mo 7-12)</label>
                                        <input type="number" class="form-control form-control-sm" id="conservative-phase-1" 
                                               min="10" max="500" step="5" value="75"
                                               onchange="updateScenarioPhase('conservative', 1, this.value)">
                                        <small class="text-muted">instances/month</small>
                                    </div>
                                </div>
                                <div class="row">
                                    <div class="col-6">
                                        <label class="form-label small">Phase 3 (Mo 13-24)</label>
                                        <input type="number" class="form-control form-control-sm" id="conservative-phase-2" 
                                               min="10" max="500" step="5" value="100"
                                               onchange="updateScenarioPhase('conservative', 2, this.value)">
                                        <small class="text-muted">instances/month</small>
                                    </div>
                                    <div class="col-6">
                                        <label class="form-label small">Phase 4 (Mo 25+)</label>
                                        <input type="number" class="form-control form-control-sm" id="conservative-phase-3" 
                                               min="10" max="500" step="5" value="150"
                                               onchange="updateScenarioPhase('conservative', 3, this.value)">
                                        <small class="text-muted">instances/month</small>
                                    </div>
                                </div>
                            </div>
                            
                            <!-- Moderate Scenario Customization -->
                            <div class="phase-settings" id="moderate-advanced" style="display: block;">
                                <h6 class="text-warning mb-3"><i class="bi bi-sliders"></i> Moderate Scenario Parameters</h6>
                                
                                <div class="row mb-2">
                                    <div class="col-6">
                                        <label class="form-label small">Monthly Churn Rate (%)</label>
                                        <input type="number" class="form-control form-control-sm" id="moderate-churn" 
                                               min="0" max="10" step="0.1" value="3.0"
                                               onchange="updateScenarioChurn('moderate', this.value)">
                                    </div>
                                </div>
                                
                                <div class="row mb-2">
                                    <div class="col-6">
                                        <label class="form-label small">Phase 1 (Mo 1-6)</label>
                                        <input type="number" class="form-control form-control-sm" id="moderate-phase-0" 
                                               min="10" max="1000" step="10" value="100"
                                               onchange="updateScenarioPhase('moderate', 0, this.value)">
                                        <small class="text-muted">instances/month</small>
                                    </div>
                                    <div class="col-6">
                                        <label class="form-label small">Phase 2 (Mo 7-12)</label>
                                        <input type="number" class="form-control form-control-sm" id="moderate-phase-1" 
                                               min="10" max="1000" step="10" value="200"
                                               onchange="updateScenarioPhase('moderate', 1, this.value)">
                                        <small class="text-muted">instances/month</small>
                                    </div>
                                </div>
                                <div class="row">
                                    <div class="col-6">
                                        <label class="form-label small">Phase 3 (Mo 13-24)</label>
                                        <input type="number" class="form-control form-control-sm" id="moderate-phase-2" 
                                               min="10" max="1000" step="10" value="300"
                                               onchange="updateScenarioPhase('moderate', 2, this.value)">
                                        <small class="text-muted">instances/month</small>
                                    </div>
                                    <div class="col-6">
                                        <label class="form-label small">Phase 4 (Mo 25+)</label>
                                        <input type="number" class="form-control form-control-sm" id="moderate-phase-3" 
                                               min="10" max="1000" step="10" value="400"
                                               onchange="updateScenarioPhase('moderate', 3, this.value)">
                                        <small class="text-muted">instances/month</small>
                                    </div>
                                </div>
                            </div>
                            
                            <!-- Aggressive Scenario Customization -->
                            <div class="phase-settings" id="aggressive-advanced" style="display: block;">
                                <h6 class="text-danger mb-3"><i class="bi bi-sliders"></i> Aggressive Scenario Parameters</h6>
                                
                                <div class="row mb-2">
                                    <div class="col-6">
                                        <label class="form-label small">Monthly Churn Rate (%)</label>
                                        <input type="number" class="form-control form-control-sm" id="aggressive-churn" 
                                               min="0" max="15" step="0.1" value="5.0"
                                               onchange="updateScenarioChurn('aggressive', this.value)">
                                    </div>
                                </div>
                                
                                <div class="row mb-2">
                                    <div class="col-6">
                                        <label class="form-label small">Phase 1 (Mo 1-6)</label>
                                        <input type="number" class="form-control form-control-sm" id="aggressive-phase-0" 
                                               min="50" max="2000" step="25" value="200"
                                               onchange="updateScenarioPhase('aggressive', 0, this.value)">
                                        <small class="text-muted">instances/month</small>
                                    </div>
                                    <div class="col-6">
                                        <label class="form-label small">Phase 2 (Mo 7-12)</label>
                                        <input type="number" class="form-control form-control-sm" id="aggressive-phase-1" 
                                               min="50" max="2000" step="25" value="400"
                                               onchange="updateScenarioPhase('aggressive', 1, this.value)">
                                        <small class="text-muted">instances/month</small>
                                    </div>
                                </div>
                                <div class="row">
                                    <div class="col-6">
                                        <label class="form-label small">Phase 3 (Mo 13-24)</label>
                                        <input type="number" class="form-control form-control-sm" id="aggressive-phase-2" 
                                               min="50" max="2000" step="25" value="600"
                                               onchange="updateScenarioPhase('aggressive', 2, this.value)">
                                        <small class="text-muted">instances/month</small>
                                    </div>
                                    <div class="col-6">
                                        <label class="form-label small">Phase 4 (Mo 25+)</label>
                                        <input type="number" class="form-control form-control-sm" id="aggressive-phase-3" 
                                               min="50" max="2000" step="25" value="800"
                                               onchange="updateScenarioPhase('aggressive', 3, this.value)">
                                        <small class="text-muted">instances/month</small>
                                    </div>
                                </div>
                            </div>
                            
                            <div class="mt-3">
                                <button type="button" class="btn btn-outline-secondary btn-sm" onclick="resetAdvancedParameters()">
                                    <i class="bi bi-arrow-clockwise"></i> Reset to Defaults
                                </button>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>

        <!-- Results Display -->
        <div class="col-lg-8">
            <!-- Loading Spinner -->
            <div class="loading-spinner" id="loading-spinner">
                <div class="spinner-border text-primary" role="status">
                    <span class="visually-hidden">Calculating...</span>
                </div>
                <p class="mt-2">Calculating scenarios...</p>
            </div>

            <!-- Summary Metrics -->
            <div class="row" id="summary-metrics">
                <div class="col-md-3 col-sm-6">
                    <div class="metric-card text-center">
                        <div class="metric-value" id="total-instances">0</div>
                        <div class="metric-label">Total Instances</div>
                    </div>
                </div>
                <div class="col-md-3 col-sm-6">
                    <div class="metric-card text-center">
                        <div class="metric-value" id="total-revenue">CHF 0</div>
                        <div class="metric-label">Total Revenue</div>
                    </div>
                </div>
                <div class="col-md-3 col-sm-6">
                    <div class="metric-card text-center">
                        <div class="metric-value" id="roi-percentage">0%</div>
                        <div class="metric-label">Average ROI</div>
                    </div>
                </div>
                <div class="col-md-3 col-sm-6">
                    <div class="metric-card text-center">
                        <div class="metric-value" id="breakeven-time">N/A</div>
                        <div class="metric-label">Avg Break-even</div>
                    </div>
                </div>
            </div>

            <!-- Charts -->
            <div class="row">
                <div class="col-12">
                    <div class="chart-container">
                        <h5><i class="bi bi-graph-up-arrow"></i> Instance Growth Over Time</h5>
                        <canvas id="instanceGrowthChart"></canvas>
                    </div>
                </div>
            </div>

            <div class="row">
                <div class="col-md-6">
                    <div class="chart-container">
                        <h5><i class="bi bi-cash-stack"></i> Cumulative Revenue</h5>
                        <canvas id="revenueChart"></canvas>
                    </div>
                </div>
                <div class="col-md-6">
                    <div class="chart-container">
                        <h5><i class="bi bi-bar-chart"></i> Monthly Cash Flow</h5>
                        <canvas id="cashFlowChart"></canvas>
                    </div>
                </div>
            </div>

            <!-- Scenario Comparison Table -->
            <div class="row">
                <div class="col-12">
                    <div class="chart-container">
                        <h5><i class="bi bi-table"></i> Scenario Comparison</h5>
                        <div class="table-responsive">
                            <table class="table table-striped" id="comparison-table">
                                <thead class="table-dark">
                                    <tr>
                                        <th>Scenario</th>
                                        <th>Final Instances</th>
                                        <th>Total Revenue</th>
                                        <th>CSP Revenue</th>
                                        <th>Servala Revenue</th>
                                        <th>ROI</th>
                                        <th>Break-even</th>
                                        <th>NPV Break-even</th>
                                    </tr>
                                </thead>
                                <tbody id="comparison-tbody">
                                    <!-- Dynamic content -->
                                </tbody>
                            </table>
                        </div>
                    </div>
                </div>
            </div>

            <!-- Monthly Breakdown -->
            <div class="row">
                <div class="col-12">
                    <div class="collapsible-section">
                        <div class="collapsible-header" onclick="toggleCollapsible('monthly-breakdown')">
                            <h5 class="mb-0">
                                <i class="bi bi-calendar3"></i> Monthly Breakdown
                                <i class="bi bi-chevron-down float-end"></i>
                            </h5>
                        </div>
                        <div class="collapsible-content" id="monthly-breakdown">
                            <div class="chart-container">
                                <div class="table-responsive" style="max-height: 400px; overflow-y: auto;">
                                    <table class="table table-sm table-striped" id="monthly-table">
                                        <thead class="table-dark sticky-top">
                                            <tr>
                                                <th>Month</th>
                                                <th>Scenario</th>
                                                <th>New Instances</th>
                                                <th>Churned</th>
                                                <th>Total Instances</th>
                                                <th>Monthly Revenue</th>
                                                <th>CSP Revenue</th>
                                                <th>Servala Revenue</th>
                                                <th>Cumulative CSP</th>
                                            </tr>
                                        </thead>
                                        <tbody id="monthly-tbody">
                                            <!-- Dynamic content -->
                                        </tbody>
                                    </table>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>
{% endblock %}

{% block extra_js %}
<script src="https://cdn.jsdelivr.net/npm/chart.js@4.4.0/dist/chart.umd.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/2.5.1/jspdf.umd.min.js"></script>
<script>
// ROI Calculator JavaScript Implementation
class ROICalculator {
    constructor() {
        this.scenarios = {
            conservative: {
                name: 'Conservative',
                enabled: true,
                churnRate: 0.02,
                phases: [
                    { months: 6, newInstancesPerMonth: 50 },
                    { months: 6, newInstancesPerMonth: 75 },
                    { months: 12, newInstancesPerMonth: 100 },
                    { months: 12, newInstancesPerMonth: 150 }
                ]
            },
            moderate: {
                name: 'Moderate',
                enabled: true,
                churnRate: 0.03,
                phases: [
                    { months: 6, newInstancesPerMonth: 100 },
                    { months: 6, newInstancesPerMonth: 200 },
                    { months: 12, newInstancesPerMonth: 300 },
                    { months: 12, newInstancesPerMonth: 400 }
                ]
            },
            aggressive: {
                name: 'Aggressive',
                enabled: true,
                churnRate: 0.05,
                phases: [
                    { months: 6, newInstancesPerMonth: 200 },
                    { months: 6, newInstancesPerMonth: 400 },
                    { months: 12, newInstancesPerMonth: 600 },
                    { months: 12, newInstancesPerMonth: 800 }
                ]
            }
        };
        
        this.charts = {};
        this.monthlyData = {};
        this.results = {};
        
        // Initialize charts
        this.initializeCharts();
        
        // Initial calculation
        this.updateCalculations();
    }
    
    getInputValues() {
        return {
            investmentAmount: parseFloat(document.getElementById('investment-amount').getAttribute('data-value')),
            timeframe: parseInt(document.getElementById('timeframe').value),
            discountRate: parseFloat(document.getElementById('discount-rate').value) / 100,
            revenuePerInstance: parseFloat(document.getElementById('revenue-per-instance').value),
            servalaShare: parseFloat(document.getElementById('servala-share').value) / 100,
            gracePeriod: parseInt(document.getElementById('grace-period').value)
        };
    }
    
    calculateScenario(scenarioKey, inputs) {
        const scenario = this.scenarios[scenarioKey];
        if (!scenario.enabled) return null;
        
        const totalMonths = inputs.timeframe * 12;
        const monthlyData = [];
        let currentInstances = 0;
        let cumulativeCSPRevenue = 0;
        let cumulativeServalaRevenue = 0;
        let breakEvenMonth = null;
        let npvBreakEvenMonth = null;
        let totalDiscountedCashFlow = -inputs.investmentAmount;
        
        // Calculate monthly discount rate
        const monthlyDiscountRate = Math.pow(1 + inputs.discountRate, 1/12) - 1;
        
        // Track phase progression
        let currentPhase = 0;
        let monthsInCurrentPhase = 0;
        
        for (let month = 1; month <= totalMonths; month++) {
            // Determine current phase
            if (monthsInCurrentPhase >= scenario.phases[currentPhase].months && currentPhase < scenario.phases.length - 1) {
                currentPhase++;
                monthsInCurrentPhase = 0;
            }
            
            // Calculate new instances for this month
            const newInstances = scenario.phases[currentPhase].newInstancesPerMonth;
            
            // Calculate churn
            const churnedInstances = Math.floor(currentInstances * scenario.churnRate);
            
            // Update total instances
            currentInstances = currentInstances + newInstances - churnedInstances;
            
            // Calculate revenue
            const monthlyRevenue = currentInstances * inputs.revenuePerInstance;
            
            // Determine revenue split based on grace period
            let cspRevenue, servalaRevenue;
            if (month <= inputs.gracePeriod) {
                cspRevenue = monthlyRevenue;
                servalaRevenue = 0;
            } else {
                cspRevenue = monthlyRevenue * (1 - inputs.servalaShare);
                servalaRevenue = monthlyRevenue * inputs.servalaShare;
            }
            
            // Update cumulative revenue
            cumulativeCSPRevenue += cspRevenue;
            cumulativeServalaRevenue += servalaRevenue;
            
            // Check for break-even
            if (breakEvenMonth === null && cumulativeCSPRevenue >= inputs.investmentAmount) {
                breakEvenMonth = month;
            }
            
            // Calculate NPV break-even
            const discountFactor = Math.pow(1 + monthlyDiscountRate, month);
            const discountedCashFlow = cspRevenue / discountFactor;
            totalDiscountedCashFlow += discountedCashFlow;
            
            if (npvBreakEvenMonth === null && totalDiscountedCashFlow >= 0) {
                npvBreakEvenMonth = month;
            }
            
            monthlyData.push({
                month,
                scenario: scenario.name,
                newInstances,
                churnedInstances,
                totalInstances: currentInstances,
                monthlyRevenue,
                cspRevenue,
                servalaRevenue,
                cumulativeCSPRevenue,
                cumulativeServalaRevenue,
                discountedCashFlow,
                totalDiscountedCashFlow: totalDiscountedCashFlow + inputs.investmentAmount
            });
            
            monthsInCurrentPhase++;
        }
        
        // Calculate final metrics
        const totalRevenue = cumulativeCSPRevenue + cumulativeServalaRevenue;
        const roi = ((cumulativeCSPRevenue - inputs.investmentAmount) / inputs.investmentAmount) * 100;
        const npv = totalDiscountedCashFlow;
        
        return {
            scenario: scenario.name,
            finalInstances: currentInstances,
            totalRevenue,
            cspRevenue: cumulativeCSPRevenue,
            servalaRevenue: cumulativeServalaRevenue,
            roi,
            npv,
            breakEvenMonth,
            npvBreakEvenMonth,
            monthlyData
        };
    }
    
    updateCalculations() {
        const inputs = this.getInputValues();
        this.results = {};
        this.monthlyData = {};
        
        // Show loading spinner
        document.getElementById('loading-spinner').style.display = 'block';
        document.getElementById('summary-metrics').style.display = 'none';
        
        // Calculate results for each enabled scenario
        Object.keys(this.scenarios).forEach(scenarioKey => {
            const result = this.calculateScenario(scenarioKey, inputs);
            if (result) {
                this.results[scenarioKey] = result;
                this.monthlyData[scenarioKey] = result.monthlyData;
            }
        });
        
        // Update UI
        setTimeout(() => {
            this.updateSummaryMetrics();
            this.updateCharts();
            this.updateComparisonTable();
            this.updateMonthlyBreakdown();
            
            // Hide loading spinner
            document.getElementById('loading-spinner').style.display = 'none';
            document.getElementById('summary-metrics').style.display = 'flex';
        }, 500);
    }
    
    updateSummaryMetrics() {
        const enabledResults = Object.values(this.results);
        if (enabledResults.length === 0) {
            document.getElementById('total-instances').textContent = '0';
            document.getElementById('total-revenue').textContent = 'CHF 0';
            document.getElementById('roi-percentage').textContent = '0%';
            document.getElementById('breakeven-time').textContent = 'N/A';
            return;
        }
        
        // Calculate averages across enabled scenarios
        const avgInstances = Math.round(enabledResults.reduce((sum, r) => sum + r.finalInstances, 0) / enabledResults.length);
        const avgRevenue = enabledResults.reduce((sum, r) => sum + r.totalRevenue, 0) / enabledResults.length;
        const avgROI = enabledResults.reduce((sum, r) => sum + r.roi, 0) / enabledResults.length;
        const avgBreakeven = enabledResults.filter(r => r.breakEvenMonth).reduce((sum, r) => sum + r.breakEvenMonth, 0) / enabledResults.filter(r => r.breakEvenMonth).length;
        
        document.getElementById('total-instances').textContent = avgInstances.toLocaleString();
        document.getElementById('total-revenue').textContent = this.formatCurrency(avgRevenue);
        document.getElementById('roi-percentage').textContent = this.formatPercentage(avgROI);
        document.getElementById('breakeven-time').textContent = isNaN(avgBreakeven) ? 'N/A' : `${Math.round(avgBreakeven)} months`;
    }
    
    initializeCharts() {
        // Instance Growth Chart
        const instanceCtx = document.getElementById('instanceGrowthChart').getContext('2d');
        this.charts.instanceGrowth = new Chart(instanceCtx, {
            type: 'line',
            data: { labels: [], datasets: [] },
            options: {
                responsive: true,
                maintainAspectRatio: false,
                plugins: {
                    legend: { position: 'top' }
                },
                scales: {
                    y: {
                        beginAtZero: true,
                        title: { display: true, text: 'Total Instances' }
                    },
                    x: {
                        title: { display: true, text: 'Month' }
                    }
                }
            }
        });
        
        // Revenue Chart
        const revenueCtx = document.getElementById('revenueChart').getContext('2d');
        this.charts.revenue = new Chart(revenueCtx, {
            type: 'line',
            data: { labels: [], datasets: [] },
            options: {
                responsive: true,
                maintainAspectRatio: false,
                plugins: {
                    legend: { position: 'top' }
                },
                scales: {
                    y: {
                        beginAtZero: true,
                        title: { display: true, text: 'Cumulative Revenue (CHF)' }
                    },
                    x: {
                        title: { display: true, text: 'Month' }
                    }
                }
            }
        });
        
        // Cash Flow Chart
        const cashFlowCtx = document.getElementById('cashFlowChart').getContext('2d');
        this.charts.cashFlow = new Chart(cashFlowCtx, {
            type: 'bar',
            data: { labels: [], datasets: [] },
            options: {
                responsive: true,
                maintainAspectRatio: false,
                plugins: {
                    legend: { position: 'top' }
                },
                scales: {
                    y: {
                        title: { display: true, text: 'Monthly Cash Flow (CHF)' }
                    },
                    x: {
                        title: { display: true, text: 'Month' }
                    }
                }
            }
        });
    }
    
    updateCharts() {
        const scenarios = Object.keys(this.results);
        if (scenarios.length === 0) return;
        
        const colors = {
            conservative: '#28a745',
            moderate: '#ffc107',
            aggressive: '#dc3545'
        };
        
        // Get month labels
        const maxMonths = Math.max(...scenarios.map(s => this.monthlyData[s].length));
        const monthLabels = Array.from({ length: maxMonths }, (_, i) => `M${i + 1}`);
        
        // Update Instance Growth Chart
        this.charts.instanceGrowth.data.labels = monthLabels;
        this.charts.instanceGrowth.data.datasets = scenarios.map(scenario => ({
            label: this.scenarios[scenario].name,
            data: this.monthlyData[scenario].map(d => d.totalInstances),
            borderColor: colors[scenario],
            backgroundColor: colors[scenario] + '20',
            tension: 0.4
        }));
        this.charts.instanceGrowth.update();
        
        // Update Revenue Chart
        this.charts.revenue.data.labels = monthLabels;
        this.charts.revenue.data.datasets = scenarios.map(scenario => ({
            label: this.scenarios[scenario].name + ' (CSP)',
            data: this.monthlyData[scenario].map(d => d.cumulativeCSPRevenue),
            borderColor: colors[scenario],
            backgroundColor: colors[scenario] + '20',
            tension: 0.4
        }));
        this.charts.revenue.update();
        
        // Update Cash Flow Chart (show average across scenarios)
        const avgCashFlow = monthLabels.map((_, monthIndex) => {
            const monthData = scenarios.map(scenario => 
                this.monthlyData[scenario][monthIndex]?.cspRevenue || 0
            );
            return monthData.reduce((sum, val) => sum + val, 0) / monthData.length;
        });
        
        this.charts.cashFlow.data.labels = monthLabels;
        this.charts.cashFlow.data.datasets = [{
            label: 'Average Monthly CSP Revenue',
            data: avgCashFlow,
            backgroundColor: '#007bff'
        }];
        this.charts.cashFlow.update();
    }
    
    updateComparisonTable() {
        const tbody = document.getElementById('comparison-tbody');
        tbody.innerHTML = '';
        
        Object.values(this.results).forEach(result => {
            const row = tbody.insertRow();
            row.innerHTML = `
                <td><strong>${result.scenario}</strong></td>
                <td>${result.finalInstances.toLocaleString()}</td>
                <td>${this.formatCurrencyDetailed(result.totalRevenue)}</td>
                <td>${this.formatCurrencyDetailed(result.cspRevenue)}</td>
                <td>${this.formatCurrencyDetailed(result.servalaRevenue)}</td>
                <td class="${result.roi >= 0 ? 'text-success' : 'text-danger'}">${this.formatPercentage(result.roi)}</td>
                <td>${result.breakEvenMonth ? result.breakEvenMonth + ' months' : 'N/A'}</td>
                <td>${result.npvBreakEvenMonth ? result.npvBreakEvenMonth + ' months' : 'N/A'}</td>
            `;
        });
    }
    
    updateMonthlyBreakdown() {
        const tbody = document.getElementById('monthly-tbody');
        tbody.innerHTML = '';
        
        // Combine all monthly data and sort by month and scenario
        const allData = [];
        Object.keys(this.monthlyData).forEach(scenario => {
            this.monthlyData[scenario].forEach(monthData => {
                allData.push(monthData);
            });
        });
        
        allData.sort((a, b) => a.month - b.month || a.scenario.localeCompare(b.scenario));
        
        allData.forEach(data => {
            const row = tbody.insertRow();
            row.innerHTML = `
                <td>${data.month}</td>
                <td><span class="badge bg-secondary">${data.scenario}</span></td>
                <td>${data.newInstances}</td>
                <td>${data.churnedInstances}</td>
                <td>${data.totalInstances.toLocaleString()}</td>
                <td>${this.formatCurrencyDetailed(data.monthlyRevenue)}</td>
                <td>${this.formatCurrencyDetailed(data.cspRevenue)}</td>
                <td>${this.formatCurrencyDetailed(data.servalaRevenue)}</td>
                <td>${this.formatCurrencyDetailed(data.cumulativeCSPRevenue)}</td>
            `;
        });
    }
    
    formatCurrency(amount) {
        // Use compact notation for large numbers in metric cards
        if (amount >= 1000000) {
            return new Intl.NumberFormat('de-CH', {
                style: 'currency',
                currency: 'CHF',
                notation: 'compact',
                minimumFractionDigits: 0,
                maximumFractionDigits: 1
            }).format(amount);
        } else {
            return new Intl.NumberFormat('de-CH', {
                style: 'currency',
                currency: 'CHF',
                minimumFractionDigits: 0,
                maximumFractionDigits: 0
            }).format(amount);
        }
    }
    
    formatCurrencyDetailed(amount) {
        // Use full formatting for detailed views (tables, exports)
        return new Intl.NumberFormat('de-CH', {
            style: 'currency',
            currency: 'CHF',
            minimumFractionDigits: 0,
            maximumFractionDigits: 0
        }).format(amount);
    }
    
    formatPercentage(value) {
        return new Intl.NumberFormat('de-CH', {
            style: 'percent',
            minimumFractionDigits: 1,
            maximumFractionDigits: 1
        }).format(value / 100);
    }
}

// Initialize calculator
let calculator;

document.addEventListener('DOMContentLoaded', function() {
    // Initialize calculator
    calculator = new ROICalculator();
    
    // Check if export libraries are loaded and enable/disable buttons accordingly
    checkExportLibraries();
});

// Check if export libraries are loaded
function checkExportLibraries() {
    const pdfButton = document.querySelector('button[onclick="exportToPDF()"]');
    
    if (typeof window.jspdf === 'undefined') {
        if (pdfButton) {
            pdfButton.disabled = true;
            pdfButton.innerHTML = '<i class="bi bi-file-pdf"></i> Loading PDF...';
        }
        
        // Retry after a short delay
        setTimeout(() => {
            if (typeof window.jspdf !== 'undefined' && pdfButton) {
                pdfButton.disabled = false;
                pdfButton.innerHTML = '<i class="bi bi-file-pdf"></i> Export PDF Report';
            }
        }, 2000);
    }
}

// Input update functions
function formatNumberWithCommas(num) {
    return parseInt(num).toLocaleString('en-US');
}

function parseFormattedNumber(str) {
    return parseFloat(str.replace(/,/g, '')) || 0;
}

function handleInvestmentAmountInput(input) {
    // Remove non-numeric characters except commas
    let value = input.value.replace(/[^\d,]/g, '');
    
    // Parse the numeric value
    let numericValue = parseFormattedNumber(value);
    
    // Enforce min/max limits
    if (numericValue < 100000) numericValue = 100000;
    if (numericValue > 2000000) numericValue = 2000000;
    
    // Update the data attribute with the raw numeric value
    input.setAttribute('data-value', numericValue.toString());
    
    // Format and display the value with commas
    input.value = formatNumberWithCommas(numericValue);
    
    // Update the slider
    document.getElementById('investment-slider').value = numericValue;
    
    // Trigger calculations
    updateCalculations();
}

function updateInvestmentAmount(value) {
    const input = document.getElementById('investment-amount');
    input.setAttribute('data-value', value);
    input.value = formatNumberWithCommas(value);
    updateCalculations();
}

function updateDiscountRate(value) {
    document.getElementById('discount-rate').value = value;
    updateCalculations();
}

function updateRevenuePerInstance(value) {
    document.getElementById('revenue-per-instance').value = value;
    updateCalculations();
}

function updateServalaShare(value) {
    document.getElementById('servala-share').value = value;
    updateCalculations();
}

function updateGracePeriod(value) {
    document.getElementById('grace-period').value = value;
    updateCalculations();
}

function updateCalculations() {
    if (calculator) {
        calculator.updateCalculations();
    }
}

// Advanced parameter functions
function updateScenarioChurn(scenarioKey, churnRate) {
    calculator.scenarios[scenarioKey].churnRate = parseFloat(churnRate) / 100;
    updateCalculations();
}

function updateScenarioPhase(scenarioKey, phaseIndex, newInstancesPerMonth) {
    calculator.scenarios[scenarioKey].phases[phaseIndex].newInstancesPerMonth = parseInt(newInstancesPerMonth);
    updateCalculations();
}

function resetAdvancedParameters() {
    if (confirm('Reset all advanced parameters to default values?')) {
        // Reset Conservative
        calculator.scenarios.conservative.churnRate = 0.02;
        calculator.scenarios.conservative.phases = [
            { months: 6, newInstancesPerMonth: 50 },
            { months: 6, newInstancesPerMonth: 75 },
            { months: 12, newInstancesPerMonth: 100 },
            { months: 12, newInstancesPerMonth: 150 }
        ];
        
        // Reset Moderate
        calculator.scenarios.moderate.churnRate = 0.03;
        calculator.scenarios.moderate.phases = [
            { months: 6, newInstancesPerMonth: 100 },
            { months: 6, newInstancesPerMonth: 200 },
            { months: 12, newInstancesPerMonth: 300 },
            { months: 12, newInstancesPerMonth: 400 }
        ];
        
        // Reset Aggressive
        calculator.scenarios.aggressive.churnRate = 0.05;
        calculator.scenarios.aggressive.phases = [
            { months: 6, newInstancesPerMonth: 200 },
            { months: 6, newInstancesPerMonth: 400 },
            { months: 12, newInstancesPerMonth: 600 },
            { months: 12, newInstancesPerMonth: 800 }
        ];
        
        // Update UI inputs
        document.getElementById('conservative-churn').value = '2.0';
        document.getElementById('conservative-phase-0').value = '50';
        document.getElementById('conservative-phase-1').value = '75';
        document.getElementById('conservative-phase-2').value = '100';
        document.getElementById('conservative-phase-3').value = '150';
        
        document.getElementById('moderate-churn').value = '3.0';
        document.getElementById('moderate-phase-0').value = '100';
        document.getElementById('moderate-phase-1').value = '200';
        document.getElementById('moderate-phase-2').value = '300';
        document.getElementById('moderate-phase-3').value = '400';
        
        document.getElementById('aggressive-churn').value = '5.0';
        document.getElementById('aggressive-phase-0').value = '200';
        document.getElementById('aggressive-phase-1').value = '400';
        document.getElementById('aggressive-phase-2').value = '600';
        document.getElementById('aggressive-phase-3').value = '800';
        
        updateCalculations();
    }
}

// Scenario management
function toggleScenario(scenarioKey) {
    const enabled = document.getElementById(scenarioKey + '-enabled').checked;
    calculator.scenarios[scenarioKey].enabled = enabled;
    
    const card = document.getElementById(scenarioKey + '-card');
    if (enabled) {
        card.classList.add('active');
        card.classList.remove('disabled');
    } else {
        card.classList.remove('active');
        card.classList.add('disabled');
    }
    
    updateCalculations();
}

// UI utility functions
function toggleCollapsible(elementId) {
    const content = document.getElementById(elementId);
    const header = content.previousElementSibling;
    const chevron = header.querySelector('.bi-chevron-down, .bi-chevron-up');
    
    if (content.classList.contains('show')) {
        content.classList.remove('show');
        chevron.classList.remove('bi-chevron-up');
        chevron.classList.add('bi-chevron-down');
    } else {
        content.classList.add('show');
        chevron.classList.remove('bi-chevron-down');
        chevron.classList.add('bi-chevron-up');
    }
}

// Export functions
function exportToPDF() {
    // Check if jsPDF is available
    if (typeof window.jspdf === 'undefined') {
        alert('PDF export library is loading. Please try again in a moment.');
        return;
    }
    
    try {
        const { jsPDF } = window.jspdf;
        const doc = new jsPDF();
        
        // Add header
        doc.setFontSize(20);
        doc.setTextColor(0, 123, 255); // Bootstrap primary blue
        doc.text('CSP ROI Calculator Report', 20, 25);
        
        // Add generation date
        doc.setFontSize(10);
        doc.setTextColor(100, 100, 100);
        const currentDate = new Date().toLocaleDateString('en-US', {
            year: 'numeric',
            month: 'long',
            day: 'numeric'
        });
        doc.text(`Generated on: ${currentDate}`, 20, 35);
        
        // Reset text color
        doc.setTextColor(0, 0, 0);
        
        // Add input parameters section
        doc.setFontSize(16);
        doc.text('Investment Parameters', 20, 50);
        
        const inputs = calculator.getInputValues();
        let yPos = 60;
        
        doc.setFontSize(11);
        const params = [
            ['Investment Amount:', calculator.formatCurrencyDetailed(inputs.investmentAmount)],
            ['Investment Timeframe:', `${inputs.timeframe} years`],
            ['Discount Rate:', `${(inputs.discountRate * 100).toFixed(1)}%`],
            ['Revenue per Instance:', calculator.formatCurrencyDetailed(inputs.revenuePerInstance)],
            ['Servala Revenue Share:', `${(inputs.servalaShare * 100).toFixed(0)}%`],
            ['Grace Period:', `${inputs.gracePeriod} months`]
        ];
        
        params.forEach(([label, value]) => {
            doc.text(label, 25, yPos);
            doc.text(value, 80, yPos);
            yPos += 8;
        });
        
        // Add scenario results section
        yPos += 10;
        doc.setFontSize(16);
        doc.text('Scenario Results', 20, yPos);
        yPos += 10;
        
        doc.setFontSize(11);
        Object.values(calculator.results).forEach(result => {
            if (yPos > 250) {
                doc.addPage();
                yPos = 20;
            }
            
            // Scenario header
            doc.setFontSize(14);
            doc.setTextColor(0, 123, 255);
            doc.text(`${result.scenario} Scenario`, 25, yPos);
            yPos += 10;
            
            doc.setFontSize(11);
            doc.setTextColor(0, 0, 0);
            
            const resultData = [
                ['Final Instances:', result.finalInstances.toLocaleString()],
                ['Total Revenue:', calculator.formatCurrencyDetailed(result.totalRevenue)],
                ['CSP Revenue:', calculator.formatCurrencyDetailed(result.cspRevenue)],
                ['Servala Revenue:', calculator.formatCurrencyDetailed(result.servalaRevenue)],
                ['ROI:', calculator.formatPercentage(result.roi)],
                ['Break-even:', result.breakEvenMonth ? `${result.breakEvenMonth} months` : 'Not achieved'],
                ['NPV Break-even:', result.npvBreakEvenMonth ? `${result.npvBreakEvenMonth} months` : 'Not achieved']
            ];
            
            resultData.forEach(([label, value]) => {
                doc.text(label, 30, yPos);
                doc.text(value, 90, yPos);
                yPos += 7;
            });
            
            yPos += 8;
        });
        
        // Add summary section
        if (yPos > 220) {
            doc.addPage();
            yPos = 20;
        }
        
        yPos += 10;
        doc.setFontSize(16);
        doc.text('Executive Summary', 20, yPos);
        yPos += 10;
        
        doc.setFontSize(11);
        const enabledResults = Object.values(calculator.results);
        if (enabledResults.length > 0) {
            const avgROI = enabledResults.reduce((sum, r) => sum + r.roi, 0) / enabledResults.length;
            const avgBreakeven = enabledResults.filter(r => r.breakEvenMonth).reduce((sum, r) => sum + r.breakEvenMonth, 0) / enabledResults.filter(r => r.breakEvenMonth).length;
            
            doc.text(`This analysis evaluates ${enabledResults.length} growth scenario(s) over a ${inputs.timeframe}-year period.`, 25, yPos);
            yPos += 8;
            doc.text(`Average projected ROI: ${calculator.formatPercentage(avgROI)}`, 25, yPos);
            yPos += 8;
            if (!isNaN(avgBreakeven)) {
                doc.text(`Average break-even timeline: ${Math.round(avgBreakeven)} months`, 25, yPos);
                yPos += 8;
            }
            
            yPos += 5;
            doc.text('Key assumptions:', 25, yPos);
            yPos += 8;
            doc.text('• Growth rates based on market analysis and industry benchmarks', 30, yPos);
            yPos += 6;
            doc.text('• Churn rates reflect typical SaaS industry standards', 30, yPos);
            yPos += 6;
            doc.text('• Revenue calculations include grace period provisions', 30, yPos);
            yPos += 6;
            doc.text('• NPV calculations use specified discount rate', 30, yPos);
        }
        
        // Add footer
        const pageCount = doc.internal.getNumberOfPages();
        for (let i = 1; i <= pageCount; i++) {
            doc.setPage(i);
            doc.setFontSize(8);
            doc.setTextColor(150, 150, 150);
            doc.text(`Page ${i} of ${pageCount}`, doc.internal.pageSize.getWidth() - 30, doc.internal.pageSize.getHeight() - 10);
            doc.text('Generated by Servala CSP ROI Calculator', 20, doc.internal.pageSize.getHeight() - 10);
        }
        
        // Save the PDF
        const filename = `servala-csp-roi-report-${new Date().toISOString().split('T')[0]}.pdf`;
        doc.save(filename);
        
    } catch (error) {
        console.error('PDF Export Error:', error);
        alert('An error occurred while generating the PDF. Please try again or export as CSV instead.');
    }
}

function exportToCSV() {
    try {
        // Create comprehensive CSV with summary and detailed data
        let csvContent = 'CSP ROI Calculator Export\n';
        csvContent += `Generated on: ${new Date().toLocaleDateString()}\n\n`;
        
        // Add input parameters
        csvContent += 'INPUT PARAMETERS\n';
        const inputs = calculator.getInputValues();
        csvContent += `Investment Amount,${inputs.investmentAmount}\n`;
        csvContent += `Timeframe (years),${inputs.timeframe}\n`;
        csvContent += `Discount Rate (%),${ (inputs.discountRate * 100).toFixed(1)}\n`;
        csvContent += `Revenue per Instance,${inputs.revenuePerInstance}\n`;
        csvContent += `Servala Share (%),${ (inputs.servalaShare * 100).toFixed(0)}\n`;
        csvContent += `Grace Period (months),${inputs.gracePeriod}\n\n`;
        
        // Add scenario summary
        csvContent += 'SCENARIO SUMMARY\n';
        csvContent += 'Scenario,Final Instances,Total Revenue,CSP Revenue,Servala Revenue,ROI (%),Break-even (months),NPV Break-even (months)\n';
        
        Object.values(calculator.results).forEach(result => {
            csvContent += `${result.scenario},${result.finalInstances},${result.totalRevenue.toFixed(2)},${result.cspRevenue.toFixed(2)},${result.servalaRevenue.toFixed(2)},${result.roi.toFixed(2)},${result.breakEvenMonth || 'N/A'},${result.npvBreakEvenMonth || 'N/A'}\n`;
        });
        
        csvContent += '\n';
        
        // Add detailed monthly data
        csvContent += 'MONTHLY BREAKDOWN\n';
        csvContent += 'Month,Scenario,New Instances,Churned Instances,Total Instances,Monthly Revenue,CSP Revenue,Servala Revenue,Cumulative CSP Revenue,Cumulative Servala Revenue\n';
        
        // Combine all monthly data
        const allData = [];
        Object.keys(calculator.monthlyData).forEach(scenario => {
            calculator.monthlyData[scenario].forEach(monthData => {
                allData.push(monthData);
            });
        });
        
        allData.sort((a, b) => a.month - b.month || a.scenario.localeCompare(b.scenario));
        
        allData.forEach(data => {
            csvContent += `${data.month},${data.scenario},${data.newInstances},${data.churnedInstances},${data.totalInstances},${data.monthlyRevenue.toFixed(2)},${data.cspRevenue.toFixed(2)},${data.servalaRevenue.toFixed(2)},${data.cumulativeCSPRevenue.toFixed(2)},${data.cumulativeServalaRevenue.toFixed(2)}\n`;
        });
        
        // Create and download file
        const blob = new Blob([csvContent], { type: 'text/csv;charset=utf-8;' });
        const link = document.createElement('a');
        const url = URL.createObjectURL(blob);
        link.setAttribute('href', url);
        
        const filename = `servala-csp-roi-data-${new Date().toISOString().split('T')[0]}.csv`;
        link.setAttribute('download', filename);
        link.style.visibility = 'hidden';
        
        document.body.appendChild(link);
        link.click();
        document.body.removeChild(link);
        
        // Clean up
        URL.revokeObjectURL(url);
        
    } catch (error) {
        console.error('CSV Export Error:', error);
        alert('An error occurred while generating the CSV file. Please try again.');
    }
}

// Reset function
function resetCalculator() {
    if (confirm('Are you sure you want to reset all parameters to default values?')) {
        // Reset input values
        const investmentInput = document.getElementById('investment-amount');
        investmentInput.setAttribute('data-value', '500000');
        investmentInput.value = '500,000';
        document.getElementById('investment-slider').value = 500000;
        document.getElementById('timeframe').value = 3;
        document.getElementById('discount-rate').value = 10;
        document.getElementById('discount-slider').value = 10;
        document.getElementById('revenue-per-instance').value = 50;
        document.getElementById('revenue-slider').value = 50;
        document.getElementById('servala-share').value = 25;
        document.getElementById('share-slider').value = 25;
        document.getElementById('grace-period').value = 6;
        document.getElementById('grace-slider').value = 6;
        
        // Reset scenarios
        ['conservative', 'moderate', 'aggressive'].forEach(scenario => {
            document.getElementById(scenario + '-enabled').checked = true;
            calculator.scenarios[scenario].enabled = true;
            document.getElementById(scenario + '-card').classList.add('active');
            document.getElementById(scenario + '-card').classList.remove('disabled');
        });
        
        // Reset advanced parameters
        resetAdvancedParameters();
        
        // Recalculate (this will be called by resetAdvancedParameters, but we ensure it happens)
        updateCalculations();
    }
}

// Logout function
function logout() {
    if (confirm('Are you sure you want to logout?')) {
        // Create a form to submit logout request
        const form = document.createElement('form');
        form.method = 'POST';
        form.action = '{% url "services:csp_roi_calculator" %}';
        
        // Add CSRF token
        const csrfInput = document.createElement('input');
        csrfInput.type = 'hidden';
        csrfInput.name = 'csrfmiddlewaretoken';
        csrfInput.value = '{{ csrf_token }}';
        form.appendChild(csrfInput);
        
        // Add logout parameter
        const logoutInput = document.createElement('input');
        logoutInput.type = 'hidden';
        logoutInput.name = 'logout';
        logoutInput.value = 'true';
        form.appendChild(logoutInput);
        
        document.body.appendChild(form);
        form.submit();
    }
}
</script>
{% endblock %}