<?php

namespace App\Http\Controllers\Api\Tenant;

use App\Http\Controllers\Controller;
use App\Models\Event;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use SimpleSoftwareIO\QrCode\Facades\QrCode;

class LiveShowLinkController extends Controller
{
    public function show(Request $request, Event $event): JsonResponse
    {
        $this->authorizeEvent($request, $event);

        $token = $event->ensureLiveShowToken();

        return response()->json([
            'data' => $this->buildPayload($event, $token),
        ]);
    }

    public function rotate(Request $request, Event $event): JsonResponse
    {
        $this->authorizeEvent($request, $event);

        $token = $event->rotateLiveShowToken();

        return response()->json([
            'data' => $this->buildPayload($event, $token),
        ]);
    }

    private function authorizeEvent(Request $request, Event $event): void
    {
        $tenantId = $request->attributes->get('tenant_id');

        if ($event->tenant_id !== $tenantId) {
            abort(404, 'Event not found');
        }
    }

    private function buildPayload(Event $event, string $token): array
    {
        $url = $this->buildLiveShowUrl($event, $token);

        return [
            'token' => $token,
            'url' => $url,
            'qr_code_data_url' => $this->buildQrCodeDataUrl($url),
            'rotated_at' => $event->live_show_token_rotated_at?->toIso8601String(),
        ];
    }

    private function buildLiveShowUrl(Event $event, string $token): string
    {
        $baseUrl = $this->resolveBaseUrl($event);

        return rtrim($baseUrl, '/').'/show/'.$token;
    }

    private function resolveBaseUrl(Event $event): string
    {
        $settings = is_array($event->settings) ? $event->settings : [];
        $customDomain = $settings['custom_domain'] ?? null;

        if (is_string($customDomain) && $customDomain !== '') {
            return sprintf('%s://%s', $this->resolveScheme(), $customDomain);
        }

        $publicUrl = $settings['public_url'] ?? null;

        if (is_string($publicUrl) && $publicUrl !== '') {
            $parsed = parse_url($publicUrl);
            $host = is_array($parsed) ? ($parsed['host'] ?? null) : null;

            if (is_string($host) && $host !== '') {
                $scheme = $parsed['scheme'] ?? $this->resolveScheme();
                $port = $parsed['port'] ?? null;
                $base = $scheme.'://'.$host;

                if ($port) {
                    $base .= ':'.$port;
                }

                return $base;
            }
        }

        return (string) config('app.url');
    }

    private function resolveScheme(): string
    {
        $appUrl = config('app.url');

        if (is_string($appUrl)) {
            $scheme = parse_url($appUrl, PHP_URL_SCHEME);

            if (is_string($scheme) && $scheme !== '') {
                return $scheme;
            }
        }

        return 'https';
    }

    private function buildQrCodeDataUrl(string $url): ?string
    {
        if ($url === '') {
            return null;
        }

        try {
            $png = QrCode::format('png')
                ->size(360)
                ->margin(1)
                ->errorCorrection('M')
                ->generate($url);

            $pngBinary = (string) $png;

            if ($pngBinary === '') {
                return null;
            }

            return 'data:image/png;base64,'.base64_encode($pngBinary);
        } catch (\Throwable $exception) {
            report($exception);
        }

        return null;
    }
}