<?php

namespace Database\Seeders;

use App\Models\Product;
use App\Models\Purchase;
use App\Models\PurchaseItem;
use App\Models\User;
use Illuminate\Database\Seeder;

class PurchaseSeeder extends Seeder
{
    /**
     * Run the database seeds.
     */
    public function run(): void
    {
        $users = User::all();
        $products = Product::all();

        if ($users->isEmpty() || $products->isEmpty()) {
            return;
        }

        Purchase::factory(50)->create()->each(function ($purchase) use ($users, $products) {
            $itemsCount = rand(1, 5);
            $total = 0;

            for ($i = 0; $i < $itemsCount; $i++) {
                $product = $products->random();
                $quantity = rand(1, 10);
                $unitPrice = rand(10000, 500000);
                $totalPrice = $quantity * $unitPrice;

                PurchaseItem::create([
                    'purchase_id' => $purchase->id,
                    'user_id' => $users->random()->id,
                    'product_id' => $product->id,
                    'quantity' => $quantity,
                    'unit_price' => $unitPrice,
                    'total_price' => $totalPrice,
                    'created_at' => $purchase->created_at,
                ]);

                $product->increment('stock', $quantity);

                $total += $totalPrice;
            }

            $purchase->update(['total' => $total]);
        });
    }
}