@extends('page.layouts.main')

@section('title', $title)

@section('content')
<div class="flex justify-center items-center min-h-screen bg-gray-100 pt-10">
    <div class="w-full max-w-lg">
        <div class="bg-white shadow rounded-lg">
            <div class="px-6 py-4 border-b border-gray-200 text-lg font-semibold bg-gray-50 rounded-t-lg">
                {{ $title }}
            </div>
            <div class="px-6 py-6">
                <div class="mb-6">
                    <label class="block text-gray-700 font-medium mb-2">{{ __('Scan QR Code') }}</label>
                    <div id="qr-reader" class="w-full"></div>
                </div>
                <div class="mb-6">
                    <small class="text-gray-500 block mb-2">{{ __('Or enter code manually if camera is not available') }}</small>
                    <input type="text" id="barcode" class="w-full px-4 py-3 border border-gray-300 rounded-lg focus:outline-none focus:ring-2 focus:ring-indigo-500 text-lg" autocomplete="off">
                </div>
                <div id="result" class="mt-4"></div>
                <audio id="scan-sound" src="{{ asset('media/beep.mp3') }}" preload="auto"></audio>
            </div>
        </div>
    </div>
</div>
@endsection

@push('scripts')
<script src="https://unpkg.com/html5-qrcode" defer></script>
<script>
    document.addEventListener('DOMContentLoaded', function () {
        const input = document.getElementById('barcode');
        const result = document.getElementById('result');
        const scanSound = document.getElementById('scan-sound');

        function playScanSound() {
            if (scanSound) {
                scanSound.pause();
                scanSound.currentTime = 0;
                scanSound.play().catch(() => {}); // Prevent errors if user gesture required
            }
        }

        function setResult(type, message) {
            if (!result) return;

            result.className = '';
            result.classList.add('alert');

            if (type === 'success') {
                result.classList.add('alert-success');
            } else if (type === 'warning') {
                result.classList.add('alert-warning');
            } else {
                result.classList.add('alert-danger');
            }

            result.textContent = message;
        }

        let lastScanned = null;
        let lastScannedAt = 0;

        function sendCode(code) {
            const trimmed = (code || '').trim();
            if (!trimmed) {
                return;
            }

            const now = Date.now();
            if (trimmed === lastScanned && now - lastScannedAt < 3000) {
                return;
            }

            lastScanned = trimmed;
            lastScannedAt = now;

            // Play sound here for both manual and QR code entry
            playScanSound();

            fetch('{{ route('attendance.scan') }}', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json',
                    'X-CSRF-TOKEN': '{{ csrf_token() }}',
                    'Accept': 'application/json'
                },
                body: JSON.stringify({ barcode: trimmed })
            })
            .then(r => r.json())
            .then(data => {
                setResult(data.status || 'error', data.message || 'Unknown response');
                if (input) {
                    input.value = '';
                    input.focus();
                }
            })
            .catch(() => {
                setResult('error', '{{ __('Error contacting server.') }}');
                if (input) {
                    input.focus();
                }
            });
        }

        if (input) {
            input.addEventListener('keydown', function (e) {
                if (e.key === 'Enter') {
                    sendCode(input.value);
                }
            });
        }

        if (window.Html5QrcodeScanner && document.getElementById('qr-reader')) {
            const qrScanner = new Html5QrcodeScanner('qr-reader', {
                fps: 10,
                qrbox: 250
            });

            qrScanner.render(function (decodedText) {
                sendCode(decodedText);
            }, function () {
                // ignore decode errors
            });
        } else {
            setResult('warning', '{{ __('Camera scanning is not available in this browser.') }}');
        }

        if (input) {
            input.focus();
        }
    });
</script>
@endpush