<?php

namespace App\Console\Commands;

use App\Models\Event;
use App\Models\EventMediaAsset;
use App\Models\EventPackage;
use App\Models\EventType;
use App\Models\Package;
use App\Models\Photo;
use App\Models\TaskCollection;
use App\Models\Tenant;
use App\Models\TenantPackage;
use App\Models\User;
use App\Services\Storage\EventStorageManager;
use Carbon\Carbon;
use Illuminate\Console\Command;
use Illuminate\Support\Arr;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Hash;
use Illuminate\Support\Facades\Http;
use Illuminate\Support\Facades\Storage;
use Illuminate\Support\Str;

class SeedDemoSwitcherTenants extends Command
{
    protected $signature = 'demo:seed-switcher {--with-photos : Download sample photos from Pexels} {--photos-per-event=18 : Target photos per event when downloading} {--cleanup : Remove demo switcher tenants/events/photos instead of seeding}';

    protected $description = 'Seeds demo tenants used by the DevTenantSwitcher (endcustomer + reseller profiles)';

    public function __construct(private EventStorageManager $eventStorageManager)
    {
        parent::__construct();
    }

    public function handle(): int
    {
        if (! app()->environment(['local', 'development', 'demo'])) {
            $this->error('Cleanup/Seeding is restricted to local/development/demo environments.');

            return self::FAILURE;
        }

        if ($this->option('cleanup')) {
            return $this->cleanup();
        }

        $this->info('Seeding demo tenants for switcher...');

        $packages = $this->loadPackages();
        $eventTypes = $this->loadEventTypes();

        DB::transaction(function () use ($packages, $eventTypes) {
            $this->seedCustomerStandardEmpty($packages, $eventTypes);
            $this->seedCustomerStarterWedding($packages, $eventTypes);
            $this->seedResellerActive($packages, $eventTypes);
            $this->seedResellerFull($packages, $eventTypes);
        });

        if ($this->option('with-photos')) {
            $this->seedPhotosFromPexels((int) $this->option('photos-per-event'));
        }

        $this->info('Done.');

        return self::SUCCESS;
    }

    private function cleanup(): int
    {
        $slugs = [
            'demo-standard-empty',
            'demo-starter-wedding',
            'demo-reseller-active',
            'demo-reseller-full',
        ];

        $eventsDeleted = 0;
        $photosDeleted = 0;
        $photoLikesDeleted = 0;
        $usersDeleted = 0;

        foreach ($slugs as $slug) {
            $tenant = Tenant::where('slug', $slug)->first();

            if (! $tenant) {
                continue;
            }

            foreach ($tenant->events as $event) {
                $eventsDeleted++;
                $photos = Photo::where('event_id', $event->id)->get();
                foreach ($photos as $photo) {
                    $deletedLikes = $photo->likes()->count();
                    $photo->likes()->delete();
                    $photoLikesDeleted += $deletedLikes;

                    $this->deleteDemoPhotoAssets($photo, $event);
                    $photo->delete();
                    $photosDeleted++;
                }

                $cleanupDisk = $this->eventStorageManager->getHotDiskForEvent($event);
                Storage::disk($cleanupDisk)->deleteDirectory("events/{$event->id}/gallery");
                Storage::disk($cleanupDisk)->deleteDirectory("events/{$event->id}/gallery/thumbs");

                $event->taskCollections()->detach();
                $event->tasks()->detach();
                $event->eventPackages()->delete();
                $event->delete();
            }

            TenantPackage::where('tenant_id', $tenant->id)->delete();
            $usersDeleted += User::where('tenant_id', $tenant->id)->count();
            User::where('tenant_id', $tenant->id)->delete();
            $tenant->delete();
        }

        $this->info(
            'Cleanup completed. Tenants deleted: '.count($slugs)
            .", Users deleted: {$usersDeleted}, Events deleted: {$eventsDeleted}, Photos deleted: {$photosDeleted}, Photo likes deleted: {$photoLikesDeleted}"
        );

        return self::SUCCESS;
    }

    private function loadPackages(): array
    {
        $slugs = [
            'starter' => 'Starter',
            'standard' => 'Standard',
            's-small-reseller' => 'Reseller S',
        ];

        $packages = [];
        foreach ($slugs as $slug => $label) {
            $package = Package::where('slug', $slug)->first();
            if (! $package) {
                $this->error("Package {$label} ({$slug}) not found. Run PackageSeeder first.");
                abort(1);
            }

            $packages[$slug] = $package;
        }

        return $packages;
    }

    private function loadEventTypes(): array
    {
        $slugs = ['wedding', 'corporate', 'birthday', 'festival'];
        $types = [];

        foreach ($slugs as $slug) {
            $eventType = EventType::where('slug', $slug)->first();
            if ($eventType) {
                $types[$slug] = $eventType;
            }
        }

        return $types;
    }

    private function seedCustomerStandardEmpty(array $packages, array $eventTypes): void
    {
        $tenant = $this->upsertTenant(
            slug: 'demo-standard-empty',
            name: 'Demo Standard (ohne Event)',
            contactEmail: 'standard-empty@demo.fotospiel',
            attributes: [
                'subscription_tier' => 'standard',
                'subscription_status' => 'active',
            ],
        );

        $this->upsertAdmin($tenant, 'standard-empty@demo.fotospiel');

        TenantPackage::updateOrCreate(
            ['tenant_id' => $tenant->id, 'package_id' => $packages['standard']->id],
            [
                'price' => $packages['standard']->price,
                'purchased_at' => Carbon::now()->subDays(1),
                'expires_at' => Carbon::now()->addMonths(12),
                'used_events' => 0,
                'active' => true,
            ]
        );

        $this->comment('Seeded Standard tenant without events.');
    }

    private function seedCustomerStarterWedding(array $packages, array $eventTypes): void
    {
        $tenant = $this->upsertTenant(
            slug: 'demo-starter-wedding',
            name: 'Demo Starter Wedding',
            contactEmail: 'starter-wedding@demo.fotospiel',
            attributes: [
                'subscription_tier' => 'starter',
                'subscription_status' => 'active',
            ],
        );

        $this->upsertAdmin($tenant, 'starter-wedding@demo.fotospiel');

        $event = $this->upsertEvent(
            tenant: $tenant,
            package: $packages['starter'],
            eventType: $eventTypes['wedding'] ?? null,
            attributes: [
                'name' => ['de' => 'Hochzeit Mia & Jonas', 'en' => 'Wedding Mia & Jonas'],
                'slug' => 'demo-starter-wedding',
                'status' => 'published',
                'is_active' => true,
                'date' => Carbon::now()->addWeeks(5),
            ],
        );

        $this->attachDefaultCollections($event);
    }

    private function seedResellerActive(array $packages, array $eventTypes): void
    {
        $tenant = $this->upsertTenant(
            slug: 'demo-reseller-active',
            name: 'Demo Reseller Active',
            contactEmail: 'reseller-active@demo.fotospiel',
            attributes: [
                'subscription_tier' => 'reseller',
                'subscription_status' => 'active',
            ],
        );

        $this->upsertAdmin($tenant, 'reseller-active@demo.fotospiel');

        TenantPackage::updateOrCreate(
            ['tenant_id' => $tenant->id, 'package_id' => $packages['s-small-reseller']->id],
            [
                'price' => $packages['s-small-reseller']->price,
                'purchased_at' => Carbon::now()->subMonths(1),
                'expires_at' => Carbon::now()->addMonths(11),
                'used_events' => 3,
                'active' => true,
            ]
        );

        $events = [
            [
                'name' => ['de' => 'Corporate Summit', 'en' => 'Corporate Summit'],
                'slug' => 'demo-reseller-corporate',
                'type' => $eventTypes['corporate'] ?? null,
                'date' => Carbon::now()->addWeeks(3),
            ],
            [
                'name' => ['de' => 'Sommerfestival', 'en' => 'Summer Festival'],
                'slug' => 'demo-reseller-festival',
                'type' => $eventTypes['festival'] ?? ($eventTypes['birthday'] ?? null),
                'date' => Carbon::now()->addWeeks(6),
            ],
            [
                'name' => ['de' => 'Geburtstag Lisa', 'en' => 'Lisa Birthday'],
                'slug' => 'demo-reseller-birthday',
                'type' => $eventTypes['birthday'] ?? null,
                'date' => Carbon::now()->addWeeks(9),
            ],
        ];

        foreach ($events as $index => $config) {
            $event = $this->upsertEvent(
                tenant: $tenant,
                package: $packages['standard'],
                eventType: $config['type'],
                attributes: [
                    'name' => $config['name'],
                    'slug' => $config['slug'],
                    'status' => 'published',
                    'is_active' => true,
                    'date' => $config['date'],
                ],
            );

            $this->attachDefaultCollections($event);
        }
    }

    private function seedResellerFull(array $packages, array $eventTypes): void
    {
        $tenant = $this->upsertTenant(
            slug: 'demo-reseller-full',
            name: 'Demo Reseller Voll',
            contactEmail: 'reseller-full@demo.fotospiel',
            attributes: [
                'subscription_tier' => 'reseller',
                'subscription_status' => 'active',
            ],
        );

        $this->upsertAdmin($tenant, 'reseller-full@demo.fotospiel');

        TenantPackage::updateOrCreate(
            ['tenant_id' => $tenant->id, 'package_id' => $packages['s-small-reseller']->id],
            [
                'price' => $packages['s-small-reseller']->price,
                'purchased_at' => Carbon::now()->subMonths(6),
                'expires_at' => Carbon::now()->addMonths(6),
                'used_events' => 5,
                'active' => true,
            ]
        );

        $eventConfigs = [
            ['slug' => 'demo-full-wedding', 'name' => ['de' => 'Hochzeit Clara & Ben', 'en' => 'Wedding Clara & Ben'], 'type' => $eventTypes['wedding'] ?? null],
            ['slug' => 'demo-full-corporate', 'name' => ['de' => 'Jahrestagung', 'en' => 'Annual Summit'], 'type' => $eventTypes['corporate'] ?? null],
            ['slug' => 'demo-full-birthday', 'name' => ['de' => 'Geburtstag Jonas', 'en' => 'Birthday Jonas'], 'type' => $eventTypes['birthday'] ?? null],
            ['slug' => 'demo-full-festival', 'name' => ['de' => 'Stadtfest', 'en' => 'City Festival'], 'type' => $eventTypes['festival'] ?? null],
            ['slug' => 'demo-full-christmas', 'name' => ['de' => 'Weihnachtsfeier', 'en' => 'Christmas Party'], 'type' => $eventTypes['corporate'] ?? null],
        ];

        foreach ($eventConfigs as $index => $config) {
            $event = $this->upsertEvent(
                tenant: $tenant,
                package: $packages['standard'],
                eventType: $config['type'],
                attributes: [
                    'name' => $config['name'],
                    'slug' => $config['slug'],
                    'status' => 'archived',
                    'is_active' => false,
                    'date' => Carbon::now()->subWeeks(5 - $index),
                ],
            );

            $this->attachDefaultCollections($event);
        }
    }

    private function upsertTenant(string $slug, string $name, string $contactEmail, array $attributes = []): Tenant
    {
        $defaults = [
            'name' => $name,
            'contact_email' => $contactEmail,
            'subscription_expires_at' => Carbon::now()->addMonths(12),
            'is_active' => true,
            'is_suspended' => false,
            'settings_updated_at' => Carbon::now(),
            'settings' => [
                'branding' => [
                    'logo_url' => null,
                    'primary_color' => '#1D4ED8',
                    'secondary_color' => '#0F172A',
                    'font_family' => 'Inter, sans-serif',
                ],
                'features' => [
                    'photo_likes_enabled' => true,
                    'event_checklist' => true,
                ],
                'contact_email' => $contactEmail,
            ],
        ];

        return Tenant::updateOrCreate(
            ['slug' => $slug],
            array_merge($defaults, $attributes, ['slug' => $slug])
        );
    }

    private function upsertAdmin(Tenant $tenant, string $email): User
    {
        $password = config('seeding.demo_tenant_password', 'Demo1234!');

        $user = User::updateOrCreate(
            ['email' => $email],
            [
                'tenant_id' => $tenant->id,
                'role' => 'tenant_admin',
                'password' => Hash::make($password),
                'first_name' => Str::headline(Str::before($tenant->slug, '-')),
                'last_name' => 'Demo',
            ]
        );

        if (! $user->email_verified_at) {
            $user->forceFill(['email_verified_at' => now()])->save();
        }

        return $user;
    }

    private function upsertEvent(Tenant $tenant, Package $package, ?EventType $eventType, array $attributes): Event
    {
        $resolvedEventType = $eventType ?? $this->fallbackEventType();

        $payload = array_merge([
            'tenant_id' => $tenant->id,
            'event_type_id' => $resolvedEventType?->id,
            'settings' => [
                'features' => [
                    'photo_likes_enabled' => true,
                    'event_checklist' => true,
                ],
            ],
        ], $attributes);

        /** @var Event $event */
        $event = Event::updateOrCreate(
            ['slug' => $attributes['slug']],
            $payload
        );

        EventPackage::updateOrCreate(
            [
                'event_id' => $event->id,
                'package_id' => $package->id,
            ],
            [
                'purchased_price' => $package->price,
                'purchased_at' => Carbon::now()->subDays(2),
                'used_photos' => 0,
                'used_guests' => 0,
                'gallery_expires_at' => Carbon::now()->addDays($package->gallery_days ?? 30),
            ]
        );

        return $event;
    }

    private function fallbackEventType(): ?EventType
    {
        $fallback = EventType::first();

        if (! $fallback) {
            $this->warn('No EventType available, events will miss type. Please run EventTypesSeeder.');
        }

        return $fallback;
    }

    private function attachDefaultCollections(Event $event): void
    {
        if (! $event->event_type_id) {
            return;
        }

        $collection = TaskCollection::where('event_type_id', $event->event_type_id)
            ->where('is_default', true)
            ->orderBy('position')
            ->first();

        if (! $collection) {
            return;
        }

        $event->taskCollections()->syncWithoutDetaching([$collection->id]);

        $taskIds = $collection->tasks()->pluck('tasks.id')->all();
        if ($taskIds !== []) {
            $event->tasks()->syncWithoutDetaching($taskIds);
        }
    }

    private function seedPhotosFromPexels(int $targetPerEvent): void
    {
        $apiKey = config('services.pexels.key') ?? env('PEXELS_API_KEY');
        if (! $apiKey) {
            $this->warn('PEXELS_API_KEY missing, skipping photo download.');

            return;
        }

        $events = Event::whereIn('slug', [
            'demo-starter-wedding',
            'demo-reseller-corporate',
            'demo-reseller-festival',
            'demo-reseller-birthday',
            'demo-full-wedding',
            'demo-full-corporate',
            'demo-full-birthday',
            'demo-full-festival',
            'demo-full-christmas',
        ])->get();

        foreach ($events as $event) {
            $query = $this->guessQueryForEvent($event);
            $this->info("Downloading photos for {$event->slug} ({$query})...");

            $photos = $this->fetchPexels($apiKey, $query, $targetPerEvent);
            if ($photos === []) {
                $this->warn('No photos returned from Pexels.');

                continue;
            }

            $this->storePhotos($event, $photos, $targetPerEvent);
        }
    }

    private function guessQueryForEvent(Event $event): string
    {
        $typeSlug = optional($event->eventType)->slug;

        return match ($typeSlug) {
            'wedding' => 'wedding photography couple',
            'corporate' => 'corporate event people',
            'birthday' => 'birthday party friends',
            default => 'event celebration crowd',
        };
    }

    private function fetchPexels(string $apiKey, string $query, int $count): array
    {
        $perPage = min(40, max(5, $count));

        $response = Http::withHeaders([
            'Authorization' => $apiKey,
        ])->get('https://api.pexels.com/v1/search', [
            'query' => $query,
            'per_page' => $perPage,
            'orientation' => 'landscape',
        ]);

        if (! $response->ok()) {
            $this->warn('Pexels request failed: '.$response->status());

            return [];
        }

        $data = $response->json();

        return Arr::get($data, 'photos', []);
    }

    private function storePhotos(Event $event, array $photos, int $targetPerEvent): void
    {
        $tenantId = $event->tenant_id;
        $disk = $this->eventStorageManager->getHotDiskForEvent($event);
        $storage = Storage::disk($disk);
        $storage->makeDirectory("events/{$event->id}/gallery");
        $storage->makeDirectory("events/{$event->id}/gallery/thumbs");

        $demoPhotos = Photo::where('event_id', $event->id)
            ->where('metadata->demo', true)
            ->get();

        foreach ($demoPhotos as $photo) {
            $this->deleteDemoPhotoAssets($photo, $event);
            $photo->delete();
        }

        $limit = min(count($photos), $targetPerEvent);
        for ($i = 0; $i < $limit; $i++) {
            $photo = $photos[$i];
            $src = $photo['src'] ?? [];
            $originalUrl = $src['large2x'] ?? $src['large'] ?? null;
            $thumbUrl = $src['medium'] ?? $src['small'] ?? $originalUrl;

            if (! $originalUrl) {
                continue;
            }

            $filename = sprintf('%s-demo-%02d.jpg', $event->slug, $i + 1);
            $thumbFilename = sprintf('%s-demo-%02d_thumb.jpg', $event->slug, $i + 1);

            $filePath = "events/{$event->id}/gallery/{$filename}";
            $thumbPath = "events/{$event->id}/gallery/thumbs/{$thumbFilename}";

            $originalBody = null;
            $thumbBody = null;
            try {
                $imageResponse = Http::get($originalUrl);
                if ($imageResponse->ok()) {
                    $originalBody = $imageResponse->body();
                    $storage->put($filePath, $originalBody);
                }

                if ($thumbUrl) {
                    $thumbResponse = Http::get($thumbUrl);
                    if ($thumbResponse->ok()) {
                        $thumbBody = $thumbResponse->body();
                        $storage->put($thumbPath, $thumbBody);
                    }
                }
            } catch (\Throwable $exception) {
                $this->warn('Failed to download image: '.$exception->getMessage());

                continue;
            }

            $timestamp = Carbon::parse($event->date ?? Carbon::now())->addHours($i);

            $photoRecord = Photo::updateOrCreate(
                [
                    'tenant_id' => $tenantId,
                    'event_id' => $event->id,
                    'file_path' => $filePath,
                ],
                [
                    'thumbnail_path' => $thumbPath,
                    'guest_name' => 'Demo Guest '.($i + 1),
                    'likes_count' => rand(1, 25),
                    'is_featured' => $i === 0,
                    'status' => 'approved',
                    'mime_type' => 'image/jpeg',
                    'size' => $originalBody ? strlen($originalBody) : null,
                    'metadata' => ['demo' => true, 'source' => 'pexels'],
                    'created_at' => $timestamp,
                    'updated_at' => $timestamp,
                ]
            );

            $originalAsset = $this->eventStorageManager->recordAsset($event, $disk, $filePath, [
                'variant' => 'original',
                'mime_type' => 'image/jpeg',
                'size_bytes' => $originalBody ? strlen($originalBody) : null,
                'checksum' => $originalBody ? hash('sha256', $originalBody) : null,
                'photo_id' => $photoRecord->id,
            ]);

            if ($thumbBody) {
                $this->eventStorageManager->recordAsset($event, $disk, $thumbPath, [
                    'variant' => 'thumbnail',
                    'mime_type' => 'image/jpeg',
                    'size_bytes' => strlen($thumbBody),
                    'photo_id' => $photoRecord->id,
                    'meta' => [
                        'source_variant_id' => $originalAsset->id,
                    ],
                ]);
            }

            $photoRecord->update(['media_asset_id' => $originalAsset->id]);
        }

        EventPackage::where('event_id', $event->id)->update([
            'used_photos' => max($limit, 0),
            'used_guests' => max(15, $event->eventPackage?->used_guests ?? 0),
        ]);

        $this->info("Seeded {$limit} photos for {$event->slug}");
    }

    private function deleteDemoPhotoAssets(Photo $photo, Event $event): void
    {
        $fallbackDisk = $this->eventStorageManager->getHotDiskForEvent($event);
        $assets = EventMediaAsset::where('photo_id', $photo->id)->get();

        foreach ($assets as $asset) {
            $assetDisk = $asset->disk ?: $fallbackDisk;
            if (! config("filesystems.disks.{$assetDisk}")) {
                $assetDisk = $fallbackDisk;
            }

            if ($asset->path) {
                Storage::disk($assetDisk)->delete($asset->path);
            }

            $asset->delete();
        }

        if ($photo->file_path) {
            Storage::disk($fallbackDisk)->delete($photo->file_path);
        }

        if ($photo->thumbnail_path) {
            Storage::disk($fallbackDisk)->delete($photo->thumbnail_path);
        }
    }
}