<?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
    {
        if (!Schema::hasTable('variant_stock_movements')) {
            Schema::create('variant_stock_movements', function (Blueprint $table) {
                $table->id();
                $table->foreignId('variant_id')->constrained('product_variants')->onDelete('cascade');
                $table->enum('type', ['opening_stock', 'restock', 'sale'])->default('restock');
                $table->integer('quantity'); // Can be positive or negative
                $table->text('notes')->nullable();
                $table->foreignId('created_by')->constrained('users')->onDelete('cascade');
                $table->timestamps();

                $table->index('variant_id');
                $table->index('type');
                $table->index('created_at');
            });
        }
    }

    /**
     * Reverse the migrations.
     */
    public function down(): void
    {
        Schema::dropIfExists('variant_stock_movements');
    }
};