<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

class CreateCartsTable extends Migration
{
    public function up()
    {
        Schema::create('carts', function (Blueprint $table) {
            $table->id();
            $table->string('session_id');
            $table->foreignId('product_id')->constrained()->cascadeOnDelete();
            $table->foreignId('variation_id')->nullable()->constrained('product_variations')->nullOnDelete();
            $table->integer('quantity')->default(1);
            $table->timestamps();

            $table->index('session_id');
        });
    }

    public function down()
    {
        Schema::dropIfExists('carts');
    }
}