<?php

namespace App\Modules\Taxonomy\Domain;

use App\Modules\Courses\Domain\CourseVersion;
use App\Modules\Courses\Domain\Enums\CourseVersionStatus;
use App\Modules\Taxonomy\Domain\Enums\MappableType;
use App\Modules\Taxonomy\Domain\Enums\MappingConfirmationStatus;
use App\Modules\Taxonomy\Domain\Enums\MappingSource;
use App\Modules\Taxonomy\Domain\Enums\MappingType;
use DomainException;
use Illuminate\Database\Eloquent\Concerns\HasUlids;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;

class ContentTaxonomyMapping extends Model
{
    use HasUlids;

    protected $fillable = [
        'organization_id', 'course_version_id', 'mappable_type', 'mappable_id',
        'taxonomy_node_id', 'mapping_type', 'mastery_level', 'weight', 'source', 'confidence',
        'confirmation_status', 'confirmed_by', 'confirmed_at',
    ];

    protected function casts(): array
    {
        return [
            'mappable_type' => MappableType::class,
            'mapping_type' => MappingType::class,
            'source' => MappingSource::class,
            'confirmation_status' => MappingConfirmationStatus::class,
            'weight' => 'decimal:4',
            'confidence' => 'decimal:4',
            'confirmed_at' => 'immutable_datetime',
        ];
    }

    protected static function booted(): void
    {
        $assertDraftVersion = function (self $mapping): void {
            $version = CourseVersion::query()->findOrFail($mapping->course_version_id);

            if ($version->status === CourseVersionStatus::Published) {
                throw new DomainException('Mappings for published course versions are immutable.');
            }
        };

        static::updating($assertDraftVersion);
        static::deleting($assertDraftVersion);
    }

    public function courseVersion(): BelongsTo
    {
        return $this->belongsTo(CourseVersion::class);
    }

    public function taxonomyNode(): BelongsTo
    {
        return $this->belongsTo(TaxonomyNode::class);
    }
}