{% 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;
}

@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">
            <!-- 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 %}