<?php

namespace App\Modules\Movies\Services\Browse\Entities;

use App\Modules\Movies\Models\{Genre, Movie};
use App\Modules\Movies\Services\Contracts\GetGenreWithMoviesServiceInterface;
use Illuminate\Contracts\Pagination\LengthAwarePaginator;
use Illuminate\Database\Eloquent\ModelNotFoundException;

class GetGenreWithMoviesService implements GetGenreWithMoviesServiceInterface
{
    /**
     * @param int $id
     * @param array{q?: string|null, per_page?: int|null} $params
     * @return array{entity: Genre, movies: LengthAwarePaginator}
     */
    public function handle(int $id, array $params = []): array
    {
        $genre = Genre::query()->find($id);
        if (!$genre) {
            throw (new ModelNotFoundException())->setModel(Genre::class, [$id]);
        }

        $perPage = max(1, min((int)($params['per_page'] ?? 20), 50));
        $q = isset($params['q']) ? trim((string)$params['q']) : '';
        $sort = isset($params['sort']) ? trim((string)$params['sort']) : 'title_asc';

        $moviesQuery = Movie::query()
            ->whereHas('genres', fn($q2) => $q2->whereKey($genre->id))
            ->with(['genres'])
            ->when($q !== '', fn($query) => $query->where('title', 'like', "%{$q}%"));

        switch ($sort) {
            case 'title_desc':
                $moviesQuery->orderBy('title', 'desc');
                break;
            case 'newest':
                $moviesQuery->orderBy('created_at', 'desc');
                break;
            case 'oldest':
                $moviesQuery->orderBy('created_at', 'asc');
                break;
            case 'year_asc':
                $moviesQuery->orderBy('year', 'asc');
                break;
            case 'year_desc':
                $moviesQuery->orderBy('year', 'desc');
                break;
            case 'title_asc':
            default:
                $moviesQuery->orderBy('title', 'asc');
                break;
        }

        $movies = $moviesQuery->paginate($perPage);

        return [
            'entity' => $genre,
            'movies' => $movies,
        ];
    }
}