<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;

class ImportMapping extends Model
{
    protected $fillable = [
        'user_id',
        'name',
        'bank_name',
        'file_type',
        'header_row',
        'data_start_row',
        'date_format',
        'decimal_separator',
        'thousands_separator',
        'column_mappings',
        'default_account_id',
        'default_category_id',
        'default_cost_center_id',
        'is_active',
    ];

    protected $casts = [
        'column_mappings' => 'array',
        'header_row' => 'integer',
        'data_start_row' => 'integer',
        'is_active' => 'boolean',
    ];

    /**
     * System fields that can be mapped
     * Nota: O campo balance é usado APENAS para gerar o hash de duplicidade,
     * NÃO é armazenado na BD para não interferir no cálculo dinâmico de saldo.
     */
    public const MAPPABLE_FIELDS = [
        'effective_date' => ['label' => 'Data Efetiva', 'required' => true, 'type' => 'date'],
        'planned_date' => ['label' => 'Data Planejada', 'required' => false, 'type' => 'date'],
        'description' => ['label' => 'Descrição', 'required' => true, 'type' => 'string'],
        'amount' => ['label' => 'Valor', 'required' => true, 'type' => 'decimal'],
        'balance' => ['label' => 'Saldo (apenas para duplicidade)', 'required' => false, 'type' => 'decimal'],
        'type' => ['label' => 'Tipo (Crédito/Débito)', 'required' => false, 'type' => 'string'],
        'notes' => ['label' => 'Observações', 'required' => false, 'type' => 'string'],
        'reference' => ['label' => 'Referência', 'required' => false, 'type' => 'string'],
        'category' => ['label' => 'Categoria', 'required' => false, 'type' => 'string'],
    ];

    /**
     * Supported file types
     */
    public const FILE_TYPES = ['xlsx', 'xls', 'csv', 'ofx', 'pdf'];

    /**
     * Common date formats
     */
    public const DATE_FORMATS = [
        'd/m/Y' => 'DD/MM/AAAA (31/12/2025)',
        'm/d/Y' => 'MM/DD/AAAA (12/31/2025)',
        'Y-m-d' => 'AAAA-MM-DD (2025-12-31)',
        'd-m-Y' => 'DD-MM-AAAA (31-12-2025)',
        'd.m.Y' => 'DD.MM.AAAA (31.12.2025)',
    ];

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

    public function defaultAccount(): BelongsTo
    {
        return $this->belongsTo(Account::class, 'default_account_id');
    }

    public function defaultCategory(): BelongsTo
    {
        return $this->belongsTo(Category::class, 'default_category_id');
    }

    public function defaultCostCenter(): BelongsTo
    {
        return $this->belongsTo(CostCenter::class, 'default_cost_center_id');
    }

    public function importLogs(): HasMany
    {
        return $this->hasMany(ImportLog::class);
    }

    /**
     * Get the column mapping for a specific field
     */
    public function getMappingForField(string $field): ?array
    {
        return $this->column_mappings[$field] ?? null;
    }

    /**
     * Check if a field is mapped
     */
    public function hasFieldMapping(string $field): bool
    {
        return isset($this->column_mappings[$field]) && !empty($this->column_mappings[$field]['columns']);
    }

    /**
     * Scope for active mappings
     */
    public function scopeActive($query)
    {
        return $query->where('is_active', true);
    }

    /**
     * Scope for specific file type
     */
    public function scopeForFileType($query, string $type)
    {
        return $query->where('file_type', $type);
    }
}