<?php

namespace App\Http\Controllers\Api\Mini;

use App\Http\Controllers\Controller;
use App\Models\QrCode;
use App\Services\Qr\QrCodeManagerService;
use App\Services\Qr\QrImageGeneratorService;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use RuntimeException;
use Symfony\Component\HttpFoundation\Response;

class PaymentQrController extends Controller
{
    public function __construct(
        private QrCodeManagerService $manager,
        private QrImageGeneratorService $imageGenerator,
    ) {}

    public function index(): JsonResponse
    {
        $qrCodes = ladill_account()->qrCodes()
            ->where('type', QrCode::TYPE_PAYMENT)
            ->latest()
            ->get();

        return response()->json([
            'data' => $qrCodes->map(fn (QrCode $qr) => PaymentPresenter::presentQr($qr, $this->previewUrl($qr)))->values(),
        ]);
    }

    public function store(Request $request): JsonResponse
    {
        abort_unless($request->user()->tokenCan('mini:write'), 403, 'Token requires mini:write ability.');

        $data = $request->validate([
            'label' => ['required', 'string', 'max:120'],
            'business_name' => ['required', 'string', 'max:120'],
            'branch_label' => ['nullable', 'string', 'max:80'],
        ]);

        $data['type'] = QrCode::TYPE_PAYMENT;
        $data['currency'] = 'GHS';

        try {
            $qrCode = $this->manager->create(ladill_account(), $data);
        } catch (RuntimeException $e) {
            return response()->json(['message' => $e->getMessage()], 422);
        }

        return response()->json([
            'data' => PaymentPresenter::presentQr($qrCode->fresh(), $this->previewUrl($qrCode)),
        ], 201);
    }

    public function show(QrCode $paymentQr): JsonResponse
    {
        $this->authorizePaymentQr($paymentQr);

        return response()->json([
            'data' => PaymentPresenter::presentQr($paymentQr, $this->previewUrl($paymentQr)),
        ]);
    }

    public function update(Request $request, QrCode $paymentQr): JsonResponse
    {
        abort_unless($request->user()->tokenCan('mini:write'), 403, 'Token requires mini:write ability.');
        $this->authorizePaymentQr($paymentQr);

        $data = $request->validate([
            'label' => ['sometimes', 'string', 'max:120'],
            'business_name' => ['sometimes', 'string', 'max:120'],
            'branch_label' => ['nullable', 'string', 'max:80'],
            'is_active' => ['sometimes', 'boolean'],
        ]);

        if ($request->has('is_active')) {
            $data['is_active'] = $request->boolean('is_active');
        }

        try {
            $this->manager->update($paymentQr, $data);
        } catch (RuntimeException $e) {
            return response()->json(['message' => $e->getMessage()], 422);
        }

        return response()->json([
            'data' => PaymentPresenter::presentQr($paymentQr->fresh(), $this->previewUrl($paymentQr)),
        ]);
    }

    public function destroy(QrCode $paymentQr): JsonResponse
    {
        abort_unless(request()->user()->tokenCan('mini:write'), 403, 'Token requires mini:write ability.');
        $this->authorizePaymentQr($paymentQr);

        $this->manager->delete($paymentQr);

        return response()->json(['data' => ['message' => 'Payment QR deleted.']]);
    }

    public function preview(QrCode $paymentQr): Response
    {
        $this->authorizePaymentQr($paymentQr);

        $qrCode = $this->imageGenerator->ensureValidImages($paymentQr);
        $bytes = $this->imageGenerator->normalizeStoredPng($qrCode->png_path);

        if ($bytes === null) {
            $bytes = $this->imageGenerator->renderPng($qrCode->encodedPayload(), $qrCode->style());
            $this->imageGenerator->generateAndStore($qrCode);
        }

        return response($bytes, 200, [
            'Content-Type' => 'image/png',
            'Cache-Control' => 'private, max-age=3600',
        ]);
    }

    private function previewUrl(QrCode $qr): string
    {
        return route('api.mini.payment-qrs.preview', $qr);
    }

    private function authorizePaymentQr(QrCode $paymentQr): void
    {
        abort_unless($paymentQr->type === QrCode::TYPE_PAYMENT, 404);
        abort_unless($paymentQr->user_id === ladill_account()->id, 403);
    }
}