<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

return new class extends Migration
{
    /**
     * Run the migrations.
     */
    public function up(): void
    {
        Schema::create('stock_audit_items', function (Blueprint $table) {
            $table->id();
            $table->foreignId('audit_id')->constrained('stock_audits')->onDelete('cascade');
            $table->foreignId('product_id')->constrained('products')->onDelete('cascade');
            $table->unsignedBigInteger('variant_id')->nullable();
            $table->decimal('system_qty', 10, 2);
            $table->decimal('physical_qty', 10, 2)->nullable();
            $table->decimal('difference_qty', 10, 2)->nullable();
            $table->timestamps();

            $table->foreign('variant_id')->references('id')->on('products')->onDelete('cascade');
            $table->index('audit_id');
            $table->unique(['audit_id', 'product_id', 'variant_id'], 'stock_audit_items_audit_product_variant_unique');
        });
    }

    /**
     * Reverse the migrations.
     */
    public function down(): void
    {
        Schema::dropIfExists('stock_audit_items');
    }
};