"""
Seed the default AdSurface records and migrate existing boolean flags to placements.

Usage:
    python manage.py seed_surfaces          # seed surfaces only
    python manage.py seed_surfaces --migrate # also migrate is_featured / is_top_event to placements
"""
from django.core.management.base import BaseCommand
from ad_control.models import AdSurface, AdPlacement
from events.models import Event


SURFACES = [
    {
        'key': 'HOME_FEATURED_CAROUSEL',
        'name': 'Featured Carousel',
        'description': 'Homepage hero carousel — high-impact banner-style placement.',
        'max_slots': 8,
        'layout_type': 'carousel',
        'sort_behavior': 'rank',
    },
    {
        'key': 'HOME_TOP_EVENTS',
        'name': 'Top Events',
        'description': 'Homepage "Top Events" grid section below the hero.',
        'max_slots': 10,
        'layout_type': 'grid',
        'sort_behavior': 'rank',
    },
]


class Command(BaseCommand):
    help = 'Seed default ad surfaces and optionally migrate boolean flags to placements.'

    def add_arguments(self, parser):
        parser.add_argument(
            '--migrate',
            action='store_true',
            help='Also migrate existing is_featured / is_top_event flags to AdPlacement rows.',
        )

    def handle(self, *args, **options):
        # --- Seed surfaces ---
        for s in SURFACES:
            obj, created = AdSurface.objects.update_or_create(
                key=s['key'],
                defaults=s,
            )
            status = 'CREATED' if created else 'EXISTS'
            self.stdout.write(f"  [{status}] {obj.key} — {obj.name}")

        # --- Migrate boolean flags ---
        if options['migrate']:
            self.stdout.write('\nMigrating boolean flags to placements...')

            featured_surface = AdSurface.objects.get(key='HOME_FEATURED_CAROUSEL')
            top_surface = AdSurface.objects.get(key='HOME_TOP_EVENTS')

            featured_events = Event.objects.filter(is_featured=True)
            top_events = Event.objects.filter(is_top_event=True)

            created_count = 0

            for rank, event in enumerate(featured_events, start=1):
                _, created = AdPlacement.objects.get_or_create(
                    surface=featured_surface,
                    event=event,
                    defaults={
                        'status': 'ACTIVE',
                        'priority': 'MANUAL',
                        'scope': 'GLOBAL',
                        'rank': rank,
                        'boost_label': 'Featured',
                    },
                )
                if created:
                    created_count += 1

            for rank, event in enumerate(top_events, start=1):
                _, created = AdPlacement.objects.get_or_create(
                    surface=top_surface,
                    event=event,
                    defaults={
                        'status': 'ACTIVE',
                        'priority': 'MANUAL',
                        'scope': 'GLOBAL',
                        'rank': rank,
                        'boost_label': 'Top Event',
                    },
                )
                if created:
                    created_count += 1

            self.stdout.write(self.style.SUCCESS(
                f'  Migrated {created_count} placements '
                f'({featured_events.count()} featured, {top_events.count()} top events).'
            ))

        self.stdout.write(self.style.SUCCESS('\nDone.'))