<?php

namespace Modules\Restaurant\Models;

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

class PurchaseItem extends Model
{
    use SoftDeletes;

    protected $fillable = [
        'restaurant_id',
        'purchase_id',
        'ingredient_id',
        'food_variant_id',
        'quantity',
        'unit_price',
        'total_cost',
        'tax_amount',
        'discount_amount',
        'batch_no',
        'expiry_date',
        'received_quantity',
        'wastage_quantity',
        'returned_quantity',
        'status',
        'created_at',
        'updated_at',
        'deleted_at',
    ];

    public const TABLE_NAME = 'purchase_items';

    protected $table = self::TABLE_NAME;

    protected $casts = [
        'expiry_date' => 'date:Y-m-d',
    ];

    // 🔗 Relationships
    public function purchase(): BelongsTo
    {
        return $this->belongsTo(Purchase::class, 'purchase_id');
    }

    public function ingredient(): BelongsTo
    {
        return $this->belongsTo(Ingredient::class, 'ingredient_id')->with('unit');
    }

    public function variant(): BelongsTo
    {
        return $this->belongsTo(FoodVariant::class, 'food_variant_id');
    }

    public function returns(): HasMany
    {
        return $this->hasMany(PurchaseReturn::class, 'purchase_item_id', 'id');
    }
}