<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Casts\Attribute;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\HasMany;

class Service extends Model
{
    use HasFactory;

    protected $fillable = [
        'cts_event_id',
        'title',
        'date',
        'preacher_name',
        'beamer_tech_name',
        'finalized_at',
        'last_synced_at',
        'cts_data',
    ];

    protected function casts(): array
    {
        return [
            'date' => 'date',
            'finalized_at' => 'datetime',
            'last_synced_at' => 'datetime',
            'cts_data' => 'array',
        ];
    }

    public function serviceSongs(): HasMany
    {
        return $this->hasMany(ServiceSong::class);
    }

    public function slides(): HasMany
    {
        return $this->hasMany(Slide::class);
    }

    /**
     * Check finalization prerequisites and return warnings.
     *
     * @return array{ready: bool, warnings: string[]}
     */
    public function finalizationStatus(): array
    {
        $warnings = [];

        $totalSongs = $this->serviceSongs()->count();
        $mappedSongs = $this->serviceSongs()->whereNotNull('song_id')->count();
        $arrangedSongs = $this->serviceSongs()->whereNotNull('song_arrangement_id')->count();
        $sermonSlides = $this->slides()->where('type', 'sermon')->count();

        if ($totalSongs > 0 && $mappedSongs < $totalSongs) {
            $warnings[] = "Nur {$mappedSongs} von {$totalSongs} Songs sind zugeordnet.";
        }

        if ($totalSongs > 0 && $arrangedSongs < $totalSongs) {
            $warnings[] = "Nur {$arrangedSongs} von {$totalSongs} Songs haben ein Arrangement.";
        }

        if ($sermonSlides === 0) {
            $warnings[] = 'Es wurden keine Predigtfolien hochgeladen.';
        }

        return [
            'ready' => empty($warnings),
            'warnings' => $warnings,
        ];
    }

    protected function isReadyToFinalize(): Attribute
    {
        return Attribute::get(fn () => $this->finalizationStatus()['ready']);
    }
}