from django.core.management.base import BaseCommand
from django.core.files.base import ContentFile
from django.utils.text import slugify
from hub.services.models import (
    ImageLibrary,
    Service,
    CloudProvider,
    ConsultingPartner,
    Article,
)
import os
import shutil


class Command(BaseCommand):
    help = "Migrate existing images to the Image Library"

    def add_arguments(self, parser):
        parser.add_argument(
            "--dry-run",
            action="store_true",
            help="Show what would be migrated without actually doing it",
        )
        parser.add_argument(
            "--force",
            action="store_true",
            help="Force migration even if images already exist in library",
        )

    def handle(self, *args, **options):
        """
        Main command handler to migrate existing images to the library.
        """
        dry_run = options["dry_run"]
        force = options["force"]

        self.stdout.write(
            self.style.SUCCESS(
                f'Starting image migration {"(DRY RUN)" if dry_run else ""}'
            )
        )

        # Migrate different types of images
        self.migrate_service_logos(dry_run, force)
        self.migrate_cloud_provider_logos(dry_run, force)
        self.migrate_partner_logos(dry_run, force)
        self.migrate_article_images(dry_run, force)

        self.stdout.write(
            self.style.SUCCESS(
                f'Image migration completed {"(DRY RUN)" if dry_run else ""}'
            )
        )

    def migrate_service_logos(self, dry_run, force):
        """
        Migrate service logos to the image library.
        """
        self.stdout.write("Migrating service logos...")

        services = Service.objects.filter(logo__isnull=False).exclude(logo="")

        for service in services:
            if not service.logo:
                continue

            # Check if image already exists in library
            existing_image = ImageLibrary.objects.filter(
                name=f"{service.name} Logo"
            ).first()

            if existing_image and not force:
                self.stdout.write(
                    self.style.WARNING(
                        f"  - Skipping {service.name} logo (already exists)"
                    )
                )
                continue

            if dry_run:
                self.stdout.write(
                    self.style.SUCCESS(f"  - Would migrate: {service.name} logo")
                )
                continue

            # Create image library entry
            image_lib = ImageLibrary(
                name=f"{service.name} Logo",
                slug=slugify(f"{service.name}-logo"),
                description=f"Logo for {service.name} service",
                alt_text=f"{service.name} logo",
                category="logo",
                tags=f"service, logo, {service.name.lower()}",
            )

            # Copy the image file
            if service.logo and os.path.exists(service.logo.path):
                with open(service.logo.path, "rb") as f:
                    image_lib.image.save(
                        os.path.basename(service.logo.name),
                        ContentFile(f.read()),
                        save=True,
                    )

                self.stdout.write(
                    self.style.SUCCESS(f"  - Migrated: {service.name} logo")
                )
            else:
                self.stdout.write(
                    self.style.ERROR(
                        f"  - Failed to migrate: {service.name} logo (file not found)"
                    )
                )

    def migrate_cloud_provider_logos(self, dry_run, force):
        """
        Migrate cloud provider logos to the image library.
        """
        self.stdout.write("Migrating cloud provider logos...")

        providers = CloudProvider.objects.filter(logo__isnull=False).exclude(logo="")

        for provider in providers:
            if not provider.logo:
                continue

            # Check if image already exists in library
            existing_image = ImageLibrary.objects.filter(
                name=f"{provider.name} Logo"
            ).first()

            if existing_image and not force:
                self.stdout.write(
                    self.style.WARNING(
                        f"  - Skipping {provider.name} logo (already exists)"
                    )
                )
                continue

            if dry_run:
                self.stdout.write(
                    self.style.SUCCESS(f"  - Would migrate: {provider.name} logo")
                )
                continue

            # Create image library entry
            image_lib = ImageLibrary(
                name=f"{provider.name} Logo",
                slug=slugify(f"{provider.name}-logo"),
                description=f"Logo for {provider.name} cloud provider",
                alt_text=f"{provider.name} logo",
                category="logo",
                tags=f"cloud, provider, logo, {provider.name.lower()}",
            )

            # Copy the image file
            if provider.logo and os.path.exists(provider.logo.path):
                with open(provider.logo.path, "rb") as f:
                    image_lib.image.save(
                        os.path.basename(provider.logo.name),
                        ContentFile(f.read()),
                        save=True,
                    )

                self.stdout.write(
                    self.style.SUCCESS(f"  - Migrated: {provider.name} logo")
                )
            else:
                self.stdout.write(
                    self.style.ERROR(
                        f"  - Failed to migrate: {provider.name} logo (file not found)"
                    )
                )

    def migrate_partner_logos(self, dry_run, force):
        """
        Migrate consulting partner logos to the image library.
        """
        self.stdout.write("Migrating consulting partner logos...")

        partners = ConsultingPartner.objects.filter(logo__isnull=False).exclude(logo="")

        for partner in partners:
            if not partner.logo:
                continue

            # Check if image already exists in library
            existing_image = ImageLibrary.objects.filter(
                name=f"{partner.name} Logo"
            ).first()

            if existing_image and not force:
                self.stdout.write(
                    self.style.WARNING(
                        f"  - Skipping {partner.name} logo (already exists)"
                    )
                )
                continue

            if dry_run:
                self.stdout.write(
                    self.style.SUCCESS(f"  - Would migrate: {partner.name} logo")
                )
                continue

            # Create image library entry
            image_lib = ImageLibrary(
                name=f"{partner.name} Logo",
                slug=slugify(f"{partner.name}-logo"),
                description=f"Logo for {partner.name} consulting partner",
                alt_text=f"{partner.name} logo",
                category="logo",
                tags=f"consulting, partner, logo, {partner.name.lower()}",
            )

            # Copy the image file
            if partner.logo and os.path.exists(partner.logo.path):
                with open(partner.logo.path, "rb") as f:
                    image_lib.image.save(
                        os.path.basename(partner.logo.name),
                        ContentFile(f.read()),
                        save=True,
                    )

                self.stdout.write(
                    self.style.SUCCESS(f"  - Migrated: {partner.name} logo")
                )
            else:
                self.stdout.write(
                    self.style.ERROR(
                        f"  - Failed to migrate: {partner.name} logo (file not found)"
                    )
                )

    def migrate_article_images(self, dry_run, force):
        """
        Migrate article images to the image library.
        """
        self.stdout.write("Migrating article images...")

        articles = Article.objects.filter(image__isnull=False).exclude(image="")

        for article in articles:
            if not article.image:
                continue

            # Check if image already exists in library
            existing_image = ImageLibrary.objects.filter(
                name=f"{article.title} Image"
            ).first()

            if existing_image and not force:
                self.stdout.write(
                    self.style.WARNING(
                        f"  - Skipping {article.title} image (already exists)"
                    )
                )
                continue

            if dry_run:
                self.stdout.write(
                    self.style.SUCCESS(f"  - Would migrate: {article.title} image")
                )
                continue

            # Create image library entry
            image_lib = ImageLibrary(
                name=f"{article.title} Image",
                slug=slugify(f"{article.title}-image"),
                description=f"Feature image for article: {article.title}",
                alt_text=f"{article.title} feature image",
                category="article",
                tags=f"article, {article.title.lower()}",
            )

            # Copy the image file
            if article.image and os.path.exists(article.image.path):
                with open(article.image.path, "rb") as f:
                    image_lib.image.save(
                        os.path.basename(article.image.name),
                        ContentFile(f.read()),
                        save=True,
                    )

                self.stdout.write(
                    self.style.SUCCESS(f"  - Migrated: {article.title} image")
                )
            else:
                self.stdout.write(
                    self.style.ERROR(
                        f"  - Failed to migrate: {article.title} image (file not found)"
                    )
                )