<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class ProjectCodingConfig extends Model
{
    use HasFactory;

    protected $fillable = [
        'project_id',
        'format',
        'elements',
        'next_sequence',
        'year_format',
        'separator',
        'sequence_length',
        'auto_generate'
    ];

    protected $casts = [
        'elements' => 'array',
        'auto_generate' => 'boolean',
    ];

    public function project()
    {
        return $this->belongsTo(Project::class);
    }

    // Método para generar un código de documento
    public function generateCode($type = 'DOC', $year = null)
    {
        $code = $this->format;
        
        // Reemplazar variables
        $replacements = [
            '[PROJECT]' => $this->project->code ?? 'PROJ',
            '[TYPE]' => $type,
            '[YEAR]' => $year ?? date($this->year_format),
            '[MONTH]' => date('m'),
            '[DAY]' => date('d'),
            '[SEQUENCE]' => str_pad($this->next_sequence, $this->sequence_length, '0', STR_PAD_LEFT),
            '[RANDOM]' => strtoupper(substr(md5(uniqid()), 0, 6)),
        ];

        // Si hay elementos personalizados, agregarlos
        if (is_array($this->elements)) {
            foreach ($this->elements as $key => $value) {
                $replacements["[{$key}]"] = $value;
            }
        }

        $code = str_replace(array_keys($replacements), array_values($replacements), $code);
        
        // Incrementar secuencia
        if (strpos($this->format, '[SEQUENCE]') !== false && $this->auto_generate) {
            $this->increment('next_sequence');
        }

        return $code;
    }

    // Método para obtener elementos disponibles
    public static function getAvailableElements()
    {
        return [
            'project' => [
                'label' => 'Código del Proyecto',
                'description' => 'Código único del proyecto',
                'variable' => '[PROJECT]',
            ],
            'type' => [
                'label' => 'Tipo de Documento',
                'description' => 'Tipo de documento (DOC, IMG, PDF, etc.)',
                'variable' => '[TYPE]',
            ],
            'year' => [
                'label' => 'Año',
                'description' => 'Año actual en formato configurable',
                'variable' => '[YEAR]',
            ],
            'month' => [
                'label' => 'Mes',
                'description' => 'Mes actual (01-12)',
                'variable' => '[MONTH]',
            ],
            'day' => [
                'label' => 'Día',
                'description' => 'Día actual (01-31)',
                'variable' => '[DAY]',
            ],
            'sequence' => [
                'label' => 'Secuencia',
                'description' => 'Número secuencial autoincremental',
                'variable' => '[SEQUENCE]',
            ],
            'random' => [
                'label' => 'Aleatorio',
                'description' => 'Cadena aleatoria de 6 caracteres',
                'variable' => '[RANDOM]',
            ],
        ];
    }
}