<?php

namespace App\Models;

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

class ProductSheet extends Model
{
    use HasFactory;

    protected $fillable = [
        'user_id',
        'business_setting_id',
        'name',
        'sku',
        'description',
        'category',
        'currency',
        'cmv_total',
        'sale_price',
        'markup_used',
        'contribution_margin',
        'is_active',
    ];

    protected $casts = [
        'cmv_total' => 'decimal:2',
        'sale_price' => 'decimal:2',
        'markup_used' => 'decimal:4',
        'contribution_margin' => 'decimal:2',
        'is_active' => 'boolean',
    ];

    /**
     * Relacionamento com usuário
     */
    public function user(): BelongsTo
    {
        return $this->belongsTo(User::class);
    }

    /**
     * Relacionamento com configuração de negócio
     */
    public function businessSetting(): BelongsTo
    {
        return $this->belongsTo(BusinessSetting::class);
    }

    /**
     * Itens/componentes de custo desta ficha técnica
     */
    public function items(): HasMany
    {
        return $this->hasMany(ProductSheetItem::class)->orderBy('sort_order');
    }

    /**
     * Recalcula o CMV total baseado nos itens
     * 
     * @return float
     */
    public function recalculateCmv(): float
    {
        $this->cmv_total = $this->items()->sum('unit_cost');
        $this->save();
        
        return $this->cmv_total;
    }

    /**
     * Calcula e atualiza o preço de venda usando o Markup da configuração
     * 
     * @param BusinessSetting|null $businessSetting
     * @return float
     */
    public function calculateSalePrice(?BusinessSetting $businessSetting = null): float
    {
        $setting = $businessSetting ?? $this->businessSetting;
        
        if (!$setting) {
            return 0;
        }
        
        $markup = $setting->markup_factor ?? $setting->calculateMarkup();
        
        if ($markup <= 0) {
            return 0;
        }
        
        $this->markup_used = $markup;
        $this->sale_price = round($this->cmv_total * $markup, 2);
        $this->contribution_margin = $this->sale_price - $this->cmv_total;
        $this->save();
        
        return $this->sale_price;
    }

    /**
     * Retorna a margem de contribuição percentual
     * 
     * @return float
     */
    public function getContributionMarginPercentAttribute(): float
    {
        if ($this->sale_price <= 0) {
            return 0;
        }
        
        return round(($this->contribution_margin / $this->sale_price) * 100, 2);
    }

    /**
     * Scope para buscar fichas do usuário
     */
    public function scopeOfUser($query, $userId)
    {
        return $query->where('user_id', $userId);
    }

    /**
     * Scope para buscar apenas fichas ativas
     */
    public function scopeActive($query)
    {
        return $query->where('is_active', true);
    }

    /**
     * Scope para buscar por categoria
     */
    public function scopeByCategory($query, $category)
    {
        return $query->where('category', $category);
    }
}