<?php

namespace App\Models;

use App\Enums\TemplateGenerationSource;
use App\Enums\TemplateGenerationStatus;
use Illuminate\Database\Eloquent\Attributes\Fillable;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;

#[Fillable([
    'template_id',
    'uuid',
    'source',
    'title',
    'language',
    'slide_count',
    'source_text',
    'status',
    'values',
    'output_path',
    'error_message',
    'requested_by',
])]
class TemplateGeneration extends Model
{
    /**
     * @return BelongsTo<Template, $this>
     */
    public function template(): BelongsTo
    {
        // Keep resolving the template even after it has been soft-deleted, so past
        // generations stay downloadable and keep their labels.
        return $this->belongsTo(Template::class)->withTrashed();
    }

    /**
     * @return BelongsTo<User, $this>
     */
    public function requester(): BelongsTo
    {
        return $this->belongsTo(User::class, 'requested_by');
    }

    /**
     * A human-friendly name for this generation, used in the admin panel and as the
     * downloaded file name. Falls back to the template title plus a short id.
     */
    public function displayName(): string
    {
        $base = $this->title ?: $this->template?->title ?: 'presentation';

        return trim($base).' - '.$this->uuid;
    }

    /**
     * Sanitized file name (without extension) for downloads. Keeps Persian characters
     * but drops anything a filesystem or HTTP header would choke on.
     */
    public function downloadFilename(): string
    {
        $base = $this->title ?: $this->template?->title ?: $this->template?->slug ?: 'presentation';

        $clean = preg_replace('/[\/\\\\?%*:|"<>\r\n]+/u', ' ', (string) $base) ?? '';
        $clean = trim(preg_replace('/\s+/u', ' ', $clean) ?? '');

        return ($clean !== '' ? $clean : 'presentation').' - '.substr($this->uuid, 0, 8);
    }

    /**
     * @return array<string, string>
     */
    protected function casts(): array
    {
        return [
            'source' => TemplateGenerationSource::class,
            'status' => TemplateGenerationStatus::class,
            'values' => 'array',
            'slide_count' => 'integer',
        ];
    }
}