<?php

namespace App\Http\Controllers;

use App\Models\Barang;
use App\Models\Pesanan;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\DB;

class CheckoutController extends Controller
{
    public function __construct()
    {
        $this->middleware('auth');
    }

    public function index(Request $request)
    {
        $request->validate([
            'barang_id' => 'required|exists:barang,id',
            'jumlah' => 'required|integer|min:1',
        ]);

        $barang = Barang::findOrFail($request->barang_id);
        
        if ($barang->stok < $request->jumlah) {
            return redirect()->back()->with('error', 'Stok tidak mencukupi');
        }

        $total = $barang->harga * $request->jumlah;

        return view('checkout.index', compact('barang', 'total'));
    }

    public function store(Request $request)
    {
        $request->validate([
            'barang_id' => 'required|exists:barang,id',
            'jumlah' => 'required|integer|min:1',
            'alamat' => 'required|string',
            'metode_pembayaran' => 'required|in:transfer_bank,e_wallet',
            'catatan' => 'nullable|string',
        ]);

        try {
            DB::beginTransaction();

            $barang = Barang::findOrFail($request->barang_id);
            
            if ($barang->stok < $request->jumlah) {
                throw new \Exception('Stok tidak mencukupi');
            }

            $total = $barang->harga * $request->jumlah;

            $pesanan = Pesanan::create([
                'user_id' => Auth::id(),
                'barang_id' => $barang->id,
                'jumlah' => $request->jumlah,
                'total_harga' => $total,
                'status' => 'menunggu_pembayaran',
                'alamat_pengiriman' => $request->alamat,
                'metode_pembayaran' => $request->metode_pembayaran,
                'catatan' => $request->catatan,
            ]);

            $barang->update([
                'stok' => $barang->stok - $request->jumlah
            ]);

            DB::commit();

            return redirect()->route('pesanan.show', $pesanan->id)
                ->with('success', 'Pesanan berhasil dibuat. Silakan lakukan pembayaran.');

        } catch (\Exception $e) {
            DB::rollBack();
            return redirect()->back()
                ->with('error', 'Terjadi kesalahan: ' . $e->getMessage())
                ->withInput();
        }
    }
}