<?php

namespace App\Http\Controllers;

use App\Models\ServiceSong;
use App\Models\Song;
use App\Services\SongMatchingService;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;

class ServiceSongController extends Controller
{
    public function __construct(
        private readonly SongMatchingService $songMatchingService,
    ) {
    }

    /**
     * Manuell einen Song aus der DB einem ServiceSong zuordnen.
     */
    public function assignSong(int $serviceSongId, Request $request): JsonResponse
    {
        $validated = $request->validate([
            'song_id' => ['required', 'integer', 'exists:songs,id'],
        ]);

        $serviceSong = ServiceSong::findOrFail($serviceSongId);
        $song = Song::findOrFail($validated['song_id']);

        $this->songMatchingService->manualAssign($serviceSong, $song);

        return response()->json([
            'message' => 'Song erfolgreich zugeordnet',
            'service_song' => $serviceSong->fresh(),
        ]);
    }

    /**
     * E-Mail-Anfrage für fehlenden Song senden.
     */
    public function requestSong(int $serviceSongId): JsonResponse
    {
        $serviceSong = ServiceSong::findOrFail($serviceSongId);

        $this->songMatchingService->requestCreation($serviceSong);

        return response()->json([
            'message' => 'Anfrage wurde gesendet',
            'service_song' => $serviceSong->fresh(),
        ]);
    }

    /**
     * Song-Zuordnung entfernen.
     */
    public function unassign(int $serviceSongId): JsonResponse
    {
        $serviceSong = ServiceSong::findOrFail($serviceSongId);

        $this->songMatchingService->unassign($serviceSong);

        return response()->json([
            'message' => 'Zuordnung entfernt',
            'service_song' => $serviceSong->fresh(),
        ]);
    }

    public function update(int $serviceSongId, Request $request): JsonResponse
    {
        $validated = $request->validate([
            'song_arrangement_id' => ['nullable', 'integer', 'exists:song_arrangements,id'],
            'use_translation' => ['sometimes', 'boolean'],
        ]);

        $serviceSong = ServiceSong::with('song')->findOrFail($serviceSongId);

        if (array_key_exists('song_arrangement_id', $validated) && $validated['song_arrangement_id'] !== null) {
            if ($serviceSong->song_id === null || $serviceSong->song === null) {
                return response()->json([
                    'message' => 'Arrangement kann ohne zugeordneten Song nicht gespeichert werden.',
                ], 422);
            }

            $isValidArrangement = $serviceSong->song
                ->arrangements()
                ->whereKey($validated['song_arrangement_id'])
                ->exists();

            if (! $isValidArrangement) {
                return response()->json([
                    'message' => 'Das Arrangement gehoert nicht zu diesem Song.',
                ], 422);
            }
        }

        $serviceSong->update($validated);

        return response()->json([
            'message' => 'Service-Song wurde aktualisiert.',
            'service_song' => $serviceSong->fresh(),
        ]);
    }
}