<?php

namespace App\Models;

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

class Cart extends Model
{
    use HasFactory;

    protected $fillable = [
        'product_id',
        'customer_id',
        'type_product',
        'price',
        'quantity',
        'months',
        'billing_cycle', // Add new field for billing cycle
        'product_pricing_id', // Add new field to link to ProductPricings
    ];

    /**
     * Get product - support both new and legacy system
     */
    public function product()
    {
        // New flow: Check if product exists in Product table first
        if ($this->product_id) {
            $product = Product::find($this->product_id);
            if ($product) {
                return $product;
            }
        }

        // Legacy flow: fallback to old system based on type_product
        return match ($this->type_product) {
            3 => $this->belongsTo(Hosting::class, 'product_id'),
            4 => $this->belongsTo(VPS::class, 'product_id'),
            default => null,
        };
    }

    /**
     * Relationship: Cart belongs to Product (new system)
     */
    public function productNew()
    {
        return $this->belongsTo(Product::class, 'product_id');
    }

    /**
     * Relationship: Cart belongs to Customer
     */
    public function customer()
    {
        return $this->belongsTo(Customer::class, 'customer_id');
    }

    /**
     * Relationship: Cart has pricing info
     */
    public function pricing()
    {
        return $this->belongsTo(ProductPricings::class, 'product_pricing_id');
    }
}