<?php

namespace App\Filament\Resources;

use App\Filament\Clusters\DailyOps\DailyOpsCluster;
use App\Filament\Resources\EventResource\Pages;
use App\Filament\Resources\EventResource\RelationManagers\EventPackagesRelationManager;
use App\Models\Event;
use App\Models\EventJoinTokenEvent;
use App\Models\EventType;
use App\Models\Tenant;
use App\Services\Audit\SuperAdminAuditLogger;
use App\Support\JoinTokenLayoutRegistry;
use BackedEnum;
use Carbon\Carbon;
use Filament\Actions;
use Filament\Forms\Components\DatePicker;
use Filament\Forms\Components\KeyValue;
use Filament\Forms\Components\Select;
use Filament\Forms\Components\TextInput;
use Filament\Forms\Components\Toggle;
use Filament\Resources\Resource;
use Filament\Schemas\Schema;
use Filament\Tables;
use Filament\Tables\Table;
use Illuminate\Database\Eloquent\Collection;
use UnitEnum;

class EventResource extends Resource
{
    protected static ?string $model = Event::class;

    protected static ?string $cluster = DailyOpsCluster::class;

    protected static BackedEnum|string|null $navigationIcon = 'heroicon-o-calendar';

    protected static UnitEnum|string|null $navigationGroup = null;

    protected static ?int $navigationSort = 20;

    public static function getNavigationGroup(): UnitEnum|string|null
    {
        return __('admin.nav.events');
    }

    public static function form(Schema $form): Schema
    {
        return $form->schema([
            Select::make('tenant_id')
                ->label(__('admin.events.fields.tenant'))
                ->options(Tenant::query()->pluck('name', 'id'))
                ->searchable()
                ->required(),
            TextInput::make('name.de')
                ->label(__('admin.events.fields.name'))
                ->required()
                ->maxLength(255),
            TextInput::make('slug')
                ->label(__('admin.events.fields.slug'))
                ->required()
                ->unique(ignoreRecord: true)
                ->maxLength(255),
            TextInput::make('join_link_display')
                ->label(__('admin.events.fields.join_link'))
                ->afterStateHydrated(function (TextInput $component, ?Event $record) {
                    if (! $record) {
                        return;
                    }
                    $token = $record->joinTokens()->latest()->first();
                    $component->state($token ? url('/e/'.$token->token) : '-');
                })
                ->readOnly()
                ->dehydrated(false)
                ->visibleOn('edit'),
            DatePicker::make('date')
                ->label(__('admin.events.fields.date'))
                ->required(),
            Select::make('event_type_id')
                ->label(__('admin.events.fields.type'))
                ->options(fn () => EventType::all()->pluck('name.de', 'id'))
                ->searchable(),
            Select::make('package_id')
                ->label(__('admin.events.fields.package'))
                ->options(\App\Models\Package::query()->where('type', 'endcustomer')->pluck('name', 'id'))
                ->searchable()
                ->preload()
                ->required()
                ->visibleOn('create'),
            TextInput::make('default_locale')
                ->label(__('admin.events.fields.default_locale'))
                ->default('de')
                ->maxLength(5),
            Toggle::make('is_active')
                ->label(__('admin.events.fields.is_active'))
                ->default(true),
            KeyValue::make('settings')
                ->label(__('admin.events.fields.settings'))
                ->keyLabel(__('admin.common.key'))
                ->valueLabel(__('admin.common.value'))
                ->addButtonLabel(__('admin.common.add'))
                ->reorderable()
                ->columnSpanFull(),
        ])->columns(2);
    }

    public static function table(Table $table): Table
    {
        return $table
            ->columns([
                Tables\Columns\TextColumn::make('id')->sortable(),
                Tables\Columns\TextColumn::make('tenant.name')->label(__('admin.events.table.tenant'))->searchable(),
                Tables\Columns\TextColumn::make('name')
                    ->label(__('admin.events.fields.name'))
                    ->formatStateUsing(fn (mixed $state): string => static::formatEventName($state))
                    ->limit(30),
                Tables\Columns\TextColumn::make('slug')->searchable(),
                Tables\Columns\TextColumn::make('date')->date(),
                Tables\Columns\IconColumn::make('is_active')->boolean(),
                Tables\Columns\TextColumn::make('eventPackage.package.name')
                    ->label(__('admin.events.table.package'))
                    ->badge()
                    ->color('success'),
                Tables\Columns\TextColumn::make('eventPackage.used_photos')
                    ->label(__('admin.events.table.used_photos'))
                    ->badge(),
                Tables\Columns\TextColumn::make('eventPackage.remaining_photos')
                    ->label(__('admin.events.table.remaining_photos'))
                    ->badge()
                    ->color(fn ($state) => $state < 1 ? 'danger' : 'success')
                    ->getStateUsing(fn ($record) => $record->eventPackage?->remaining_photos ?? 0),
                Tables\Columns\TextColumn::make('created_at')->since(),
            ])
            ->filters([])
            ->actions([
                Actions\EditAction::make()
                    ->after(fn (array $data, Event $record) => app(SuperAdminAuditLogger::class)->recordModelMutation(
                        'updated',
                        $record,
                        SuperAdminAuditLogger::fieldsMetadata($data),
                        static::class
                    )),
                Actions\Action::make('toggle')
                    ->label(__('admin.events.actions.toggle_active'))
                    ->icon('heroicon-o-power')
                    ->action(function (Event $record): void {
                        $record->update(['is_active' => ! $record->is_active]);

                        app(SuperAdminAuditLogger::class)->record(
                            'event.toggled',
                            $record,
                            SuperAdminAuditLogger::fieldsMetadata(['is_active']),
                            source: static::class
                        );
                    }),
                Actions\Action::make('download_photos')
                    ->label(__('admin.events.actions.download_photos'))
                    ->icon('heroicon-o-arrow-down-tray')
                    ->url(fn (Event $record) => route('tenant.events.photos.archive', $record))
                    ->openUrlInNewTab()
                    ->visible(fn (Event $record) => $record->photos()->where('status', 'approved')->exists()),
                Actions\Action::make('join_tokens')
                    ->label(__('admin.events.actions.join_link_qr'))
                    ->icon('heroicon-o-qr-code')
                    ->modalHeading(__('admin.events.modal.join_link_heading'))
                    ->modalSubmitActionLabel(__('admin.common.close'))
                    ->modalWidth('xl')
                    ->modalContent(function ($record) {
                        $tokens = $record->joinTokens()
                            ->orderByDesc('created_at')
                            ->get();

                        if ($tokens->isEmpty()) {
                            return view('filament.events.join-link', [
                                'event' => $record,
                                'tokens' => collect(),
                            ]);
                        }

                        $tokenIds = $tokens->pluck('id');
                        $now = now();

                        $totals = EventJoinTokenEvent::query()
                            ->selectRaw('event_join_token_id, event_type, COUNT(*) as total')
                            ->whereIn('event_join_token_id', $tokenIds)
                            ->groupBy('event_join_token_id', 'event_type')
                            ->get()
                            ->groupBy('event_join_token_id');

                        $recent24h = EventJoinTokenEvent::query()
                            ->selectRaw('event_join_token_id, COUNT(*) as total')
                            ->whereIn('event_join_token_id', $tokenIds)
                            ->where('occurred_at', '>=', $now->copy()->subHours(24))
                            ->groupBy('event_join_token_id')
                            ->pluck('total', 'event_join_token_id');

                        $lastSeen = EventJoinTokenEvent::query()
                            ->whereIn('event_join_token_id', $tokenIds)
                            ->selectRaw('event_join_token_id, MAX(occurred_at) as last_at')
                            ->groupBy('event_join_token_id')
                            ->pluck('last_at', 'event_join_token_id');

                        $tokens = $tokens->map(function ($token) use ($record, $totals, $recent24h, $lastSeen) {
                            $layouts = JoinTokenLayoutRegistry::toResponse(function (string $layoutId, string $format) use ($record, $token) {
                                return route('api.v1.tenant.events.join-tokens.layouts.download', [
                                    'event' => $record->slug,
                                    'joinToken' => $token->getKey(),
                                    'layout' => $layoutId,
                                    'format' => $format,
                                ]);
                            });

                            $analyticsGroup = $totals->get($token->id, collect());
                            $analytics = $analyticsGroup->mapWithKeys(function ($row) {
                                return [$row->event_type => (int) $row->total];
                            });

                            $successCount = (int) ($analytics['access_granted'] ?? 0) + (int) ($analytics['gallery_access_granted'] ?? 0);
                            $failureCount = (int) ($analytics['invalid_token'] ?? 0)
                                + (int) ($analytics['token_expired'] ?? 0)
                                + (int) ($analytics['token_revoked'] ?? 0)
                                + (int) ($analytics['token_rate_limited'] ?? 0)
                                + (int) ($analytics['event_not_public'] ?? 0)
                                + (int) ($analytics['gallery_expired'] ?? 0);

                            $lastSeenAt = $lastSeen->get($token->id);

                            return [
                                'id' => $token->id,
                                'label' => $token->label,
                                'token' => $token->token,
                                'url' => url('/e/'.$token->token),
                                'usage_limit' => $token->usage_limit,
                                'usage_count' => $token->usage_count,
                                'expires_at' => optional($token->expires_at)->toIso8601String(),
                                'revoked_at' => optional($token->revoked_at)->toIso8601String(),
                                'is_active' => $token->isActive(),
                                'created_at' => optional($token->created_at)->toIso8601String(),
                                'layouts' => $layouts,
                                'layouts_url' => route('api.v1.tenant.events.join-tokens.layouts.index', [
                                    'event' => $record->slug,
                                    'joinToken' => $token->getKey(),
                                ]),
                                'analytics' => [
                                    'success_total' => $successCount,
                                    'failure_total' => $failureCount,
                                    'rate_limited_total' => (int) ($analytics['token_rate_limited'] ?? 0),
                                    'recent_24h' => (int) $recent24h->get($token->id, 0),
                                    'last_seen_at' => $lastSeenAt ? Carbon::parse($lastSeenAt)->toIso8601String() : null,
                                ],
                            ];
                        });

                        return view('filament.events.join-link', [
                            'event' => $record,
                            'tokens' => $tokens,
                        ]);
                    }),
            ])
            ->bulkActions([
                Actions\DeleteBulkAction::make()
                    ->after(function (Collection $records): void {
                        $logger = app(SuperAdminAuditLogger::class);

                        foreach ($records as $record) {
                            $logger->recordModelMutation(
                                'deleted',
                                $record,
                                source: static::class
                            );
                        }
                    }),
            ]);
    }

    public static function getRelations(): array
    {
        return [
            EventPackagesRelationManager::class,
        ];
    }

    /**
     * @param  array<string, mixed>|string|null  $name
     */
    private static function formatEventName(mixed $name): string
    {
        if (is_array($name)) {
            $candidates = [
                $name['de'] ?? null,
                $name['en'] ?? null,
                reset($name) ?: null,
            ];

            foreach ($candidates as $candidate) {
                if (is_string($candidate) && $candidate !== '') {
                    return $candidate;
                }
            }

            return '';
        }

        return is_string($name) ? $name : '';
    }

    public static function getPages(): array
    {
        return [
            'index' => Pages\ListEvents::route('/'),
            'create' => Pages\CreateEvent::route('/create'),
            'view' => Pages\ViewEvent::route('/{record}'),
            'edit' => Pages\EditEvent::route('/{record}/edit'),
            'watermark' => Pages\ManageWatermark::route('/{record}/watermark'),
        ];
    }
}