<?php

namespace App\Http\Controllers\Public;

use App\Http\Controllers\Controller;
use App\Models\QrCode;
use App\Services\Merchant\BookingSlotService;
use App\Services\Merchant\MerchantSaleService;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\View\View;
use RuntimeException;

class BookingController extends Controller
{
    public function __construct(
        private BookingSlotService $slots,
        private MerchantSaleService $sales,
    ) {}

    public function slots(Request $request, string $shortCode): JsonResponse
    {
        $qrCode = $this->resolveBookingQr($shortCode);
        $validated = $request->validate([
            'date' => ['required', 'date', 'after_or_equal:today'],
            'service_index' => ['required', 'integer', 'min:0'],
        ]);

        return response()->json([
            'slots' => $this->slots->availableSlots(
                $qrCode,
                $validated['date'],
                (int) $validated['service_index'],
            ),
        ]);
    }

    public function store(Request $request, string $shortCode): JsonResponse
    {
        $qrCode = $this->resolveBookingQr($shortCode);

        $validated = $request->validate([
            'customer_name' => ['required', 'string', 'max:120'],
            'customer_email' => ['required', 'email', 'max:200'],
            'customer_phone' => ['nullable', 'string', 'max:30'],
            'service_index' => ['required', 'integer', 'min:0'],
            'starts_at' => ['required', 'date'],
        ]);

        try {
            $result = $this->sales->initiateBooking($qrCode, $validated);
        } catch (RuntimeException $e) {
            return response()->json(['error' => $e->getMessage()], 422);
        }

        if ($result['checkout_url']) {
            return response()->json([
                'checkout_url' => $result['checkout_url'],
                'callback_url' => $result['callback_url'],
            ]);
        }

        return response()->json([
            'confirmed' => true,
            'redirect_url' => route('qr.public.booking.confirmed', [
                'shortCode' => $shortCode,
                'booking' => $result['booking']->id,
            ]),
        ]);
    }

    public function callback(Request $request, string $shortCode): RedirectResponse
    {
        $reference = trim((string) $request->query('reference', ''));
        if ($reference === '') {
            return redirect('/q/'.$shortCode)->with('error', 'Missing payment reference.');
        }

        try {
            $booking = $this->sales->completeBooking($reference);
        } catch (\Throwable) {
            return redirect('/q/'.$shortCode)->with('order_error', 'Payment could not be verified. Reference: '.$reference);
        }

        return redirect()->route('qr.public.booking.confirmed', [
            'shortCode' => $shortCode,
            'booking' => $booking->id,
        ]);
    }

    public function confirmed(string $shortCode, int $booking): View
    {
        $qrCode = $this->resolveBookingQr($shortCode);
        $record = $qrCode->bookings()->whereKey($booking)->firstOrFail();

        return view('public.qr.booking-confirmed', [
            'qrCode' => $qrCode,
            'booking' => $record,
        ]);
    }

    private function resolveBookingQr(string $shortCode): QrCode
    {
        $qrCode = QrCode::query()
            ->where('short_code', $shortCode)
            ->where('is_active', true)
            ->firstOrFail();

        abort_unless($qrCode->isBookingType(), 404);

        return $qrCode;
    }
}