@extends('backend.layouts.app')

@section('title', __('Scan'))

@section('content')
    <div class="nk-content-wrap">
        <div class="row">
            <div class="col-md-6 offset-md-3">
                <div class="card">
                    <div class="card-body text-center">
                        <h6>Scan User QR</h6>
                        <div>
                            <b>Device has camera: </b>
                            <span id="cam-has-camera"></span>
                            <br>
                            <b>Device has flash: </b>
                            <span id="cam-has-flash"></span>
                            <br>
                            <div class="">
                                <video id="qr-video" width="200px"></video>
                            </div>
                            <br>
                        </div>
                        <div>
                            <button class="btn btn-info btn-xs" id="flash-toggle">📸 Flash: <span id="flash-state">off</span></button>
                        </div>
                        <div>
                            <select class="form-control" id="inversion-mode-select">
                                <option value="original">Scan original (dark QR code on bright background)</option>
                                <option value="invert">Scan with inverted colors (bright QR code on dark background)</option>
                                <option value="both">Scan both</option>
                            </select>
                            <br>
                        </div>
                        <b>Detected QR code: </b>
                        <span id="cam-qr-result">None</span>
                        <br>
                        <b>Last detected at: </b>
                        <span id="cam-qr-result-timestamp"></span>
                        <hr>

                        <a href="{{ route('admin.parcel.index') }}" class="btn btn-primary">
                            <i class="fas fa-home"></i> Back
                        </a>
                    </div>
                </div>
            </div>
        </div>
    </div>
@endsection
@push('after-scripts')
    <script type="module">
        import QrScanner from "{{ asset('plugin/qr/qr-scanner.min.js') }}";
        QrScanner.WORKER_PATH = "{{ asset('plugin/qr/qr-scanner-worker.min.js') }}";

        const video = document.getElementById('qr-video');
        const camHasCamera = document.getElementById('cam-has-camera');
        const camHasFlash = document.getElementById('cam-has-flash');
        const flashToggle = document.getElementById('flash-toggle');
        const flashState = document.getElementById('flash-state');
        const camQrResult = document.getElementById('cam-qr-result');
        const camQrResultTimestamp = document.getElementById('cam-qr-result-timestamp');
        const fileSelector = document.getElementById('file-selector');
        const fileQrResult = document.getElementById('file-qr-result');

        function setResult(label, result) {


            let url = new URL(result);
            let params = new URLSearchParams(url.search);

            let checkParam = params.has('tracking_no') ;

            if(checkParam){
                let tracking_no = params.get('tracking_no');
                let uid = params.get('uid');

                window.location='{{ route('admin.parcel.view') }}'+"?tracking_no="+tracking_no+"&uid="+uid;
                scanner.stop();
                label.textContent = result;
                camQrResultTimestamp.textContent = new Date().toString();
                label.style.color = 'teal';
                clearTimeout(label.highlightTimeout);
                label.highlightTimeout = setTimeout(() => label.style.color = 'inherit', 100);

            }
        }

        // ####### Web Cam Scanning #######

        QrScanner.hasCamera().then(hasCamera => camHasCamera.textContent = hasCamera);

        const scanner = new QrScanner(video, result => setResult(camQrResult, result), error => {
            camQrResult.textContent = error;
            camQrResult.style.color = 'inherit';
        });
        scanner.start().then(() => {
            scanner.hasFlash().then(hasFlash => {
                camHasFlash.textContent = hasFlash;
                if (hasFlash) {
                    flashToggle.style.display = 'inline-block';
                    flashToggle.addEventListener('click', () => {
                        scanner.toggleFlash().then(() => flashState.textContent = scanner.isFlashOn() ? 'on' : 'off');
                    });
                }
            });
        });

        // for debugging
        window.scanner = scanner;

        document.getElementById('show-scan-region').addEventListener('change', (e) => {
            const input = e.target;
            const label = input.parentNode;
            label.parentNode.insertBefore(scanner.$canvas, label.nextSibling);
            scanner.$canvas.style.display = input.checked ? 'block' : 'none';
        });

        document.getElementById('inversion-mode-select').addEventListener('change', event => {
            scanner.setInversionMode(event.target.value);
        });

        document.getElementById('start-button').addEventListener('click', () => {
            scanner.start();
        });

        document.getElementById('stop-button').addEventListener('click', () => {
            scanner.stop();
        });


    </script>
@endpush