<?php

namespace App\Modules\LearningPaths\Domain;

use App\Modules\Courses\Domain\Enums\CourseVersionStatus;
use DomainException;
use Illuminate\Database\Eloquent\Concerns\HasUlids;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;

class LearningPathVersion extends Model
{
    use HasUlids;

    protected $fillable = ['organization_id', 'learning_path_id', 'source_version_id', 'version_number', 'status', 'title', 'description', 'settings', 'review_submitted_at', 'published_at', 'scheduled_publish_at', 'scheduled_unpublish_at', 'unpublished_at'];

    protected function casts(): array
    {
        return [
            'status' => CourseVersionStatus::class, 'settings' => 'array',
            'review_submitted_at' => 'immutable_datetime', 'published_at' => 'immutable_datetime',
            'scheduled_publish_at' => 'immutable_datetime', 'scheduled_unpublish_at' => 'immutable_datetime', 'unpublished_at' => 'immutable_datetime',
        ];
    }

    protected static function booted(): void
    {
        static::updating(function (self $version) {
            if ($version->getOriginal('status') === CourseVersionStatus::Published->value) {
                throw new DomainException('Published learning path versions are immutable.');
            }
        });
    }

    public function path(): BelongsTo
    {
        return $this->belongsTo(LearningPath::class, 'learning_path_id');
    }

    public function items(): HasMany
    {
        return $this->hasMany(LearningPathItem::class)->orderBy('position');
    }
}