<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Str;

class Certificate extends Model
{
    protected $fillable = [
        'uuid', 'program_id', 'participant_id', 'certificate_template_id',
        'certificate_no', 'file_path', 'token', 'status', 'error_message',
        'generated_at', 'emailed_at', 'downloaded_at', 'download_count',
    ];

    protected function casts(): array
    {
        return [
            'generated_at'   => 'datetime',
            'emailed_at'     => 'datetime',
            'downloaded_at'  => 'datetime',
            'download_count' => 'integer',
        ];
    }

    protected static function boot(): void
    {
        parent::boot();
        static::creating(function ($model) {
            $model->uuid  ??= (string) Str::uuid();
            $model->token ??= Str::random(48);
        });
    }

    public function program()
    {
        return $this->belongsTo(Program::class);
    }

    public function participant()
    {
        return $this->belongsTo(Participant::class);
    }

    public function template()
    {
        return $this->belongsTo(CertificateTemplate::class, 'certificate_template_id');
    }

    public function emailLogs()
    {
        return $this->hasMany(EmailLog::class);
    }

    public function isGenerated(): bool
    {
        return $this->status === 'generated' || $this->status === 'emailed' || $this->status === 'downloaded';
    }

    public function recordDownload(): void
    {
        $this->increment('download_count');
        if (! $this->downloaded_at) {
            $this->update(['downloaded_at' => now(), 'status' => 'downloaded']);
        }
    }
}