{% extends "base.html" %}
{% load static %}

{% block additional_css %}
    <link rel="preload" as="style" onload="this.rel='stylesheet';this.onload=null" href="https://unpkg.com/normalize.css@8.0.0/normalize.css">
    <link rel="preload" as="style" onload="this.rel='stylesheet';this.onload=null" href="https://unpkg.com/milligram@1.3.0/dist/milligram.min.css">
{% endblock %}

{% block title %}Smartphone Scanner{% endblock %}

{% block content %}
    <div class="container" >

        <div class="row-mb8" id="video-button-content">
            <a class="button" id="startButton">Start</a>
            <a class="button-outline" id="resetButton">Reset</a>
        </div>
        <div class="row" id="video-content">
            <div class="col-6">
                <video id="video" width="450" height="320" style="border: 1px solid gray"></video>
            </div>

            <div class="col-2" id="sourceSelectPanel" style="display:none">
                <label for="sourceSelect">Change video source:</label>
                <select id="sourceSelect" style="max-width:400px">
                </select>
            </div>

            <div class="col-2">
                <label>Result:</label>
                <pre><code id="result"></code></pre>
                <ul id="barcode-list"></ul>
            </div>
        </div>

    </div>

    <script type="text/javascript">
    function beep() {
        var audio = new Audio("{% static 'sound/beep.mp3' %}");
        audio.volume = 0.1
        console.log("Audio play {% static 'sound/beep.mp3' %}")
        audio.play();
    }

    // check compatibility
    if (!('BarcodeDetector' in window)) {
      console.log('Barcode Detector is not supported by this browser.');
    } else {
      console.log('Barcode Detector supported!');

      // create new detector
      // var barcodeDetector = new BarcodeDetector({formats: ['code_128', 'code_39', 'code_93', 'codabar', 'data_matrix', 'ean_13', 'ean_8', 'qr_code', 'upc_a', 'upc_e']});
      var barcodeDetector = new BarcodeDetector({formats: ['code_128', 'ean_13']});
      console.log('Supported code formats:');
      BarcodeDetector.getSupportedFormats().then(supportedFormats => {
        supportedFormats.forEach(format => console.log(format));
      });
      console.log('end-of-format-list');
    }

    async function detect() {
        const mediaStream = await navigator.mediaDevices.getUserMedia({
            video: {facingMode: 'environment'}
        });
        const video = document.getElementById('video');
        // const video = document.createElement('video');
        let itemsFound = [];

        video.srcObject = mediaStream;
        video.autoplay = true;
        const list = document.getElementById('barcode-list');
        // list.before(video);

        function render() {
            barcodeDetector
                .detect(video)
                .then(barcodes => {
                    barcodes.forEach(barcode => {
                        if (!itemsFound.includes(barcode.rawValue)) {
                            itemsFound.push(barcode.rawValue);
                            const li = document.createElement('li');
                            li.innerHTML = barcode.rawValue;
                            list.appendChild(li);
                            console.log('Got scan ' + barcode.rawValue);
                        }
                    });
                    // beep();
                })
                .catch(console.error);
        }

        (function renderLoop() {
            requestAnimationFrame(renderLoop);
            render();
        })();
    }

    window.addEventListener('load', function () {
        detect();
        document.getElementById('resetButton').addEventListener('click', () => {
            document.getElementById('result').textContent = '';
            codeReader.reset();
            console.log('Reset.')
        });
    });
    </script>

<hr />
<div class="row mb-3">
    <div class="col-8">
        <div class="input-group">
            <input class="form-control" type="text" maxlength="40" id="container_id" placeholder="Container ID">
            <input class="form-control" type="text" maxlength="40" id="asset_id" placeholder="Asset ID">
        </div>
    </div>
    <div class="col-2">
        <div class="input-group">
            <input class="btn btn-primary" id="book-in-button" type="button" value="+Book">
            <input class="btn btn-primary" id="book-out-button" type="button" value="-Book">
        </div>
    </div>
    <div class="col-8">
        <div class="input-group">
            <textarea class="form-control" readonly="readonly" rows="4" id="container_details"></textarea>
            <textarea class="form-control" readonly="readonly" rows="4" id="asset_details"></textarea>
        </div>
    </div>
</div>
<div class="row">
    <div class="input-group">
        <textarea class="form-control mb-2" id="chat-log" cols="100" rows="10"></textarea>
        <input class="btn btn-secondary" id="clear-chat-area" type="button" value="Clear">
    </div>
</div>
<script>
    var containerIsValid = false;
    var assetIsValid = false;

    async function getContainerInfo(containerId) {
        document.querySelector('#container_id').value = containerId;
        url = '/api/containers?named_id=' + containerId;
        document.querySelector('#container_details').value = 'Trying ' + url;
        const response = await fetch(url);
        const container = await response.json();
        if (container.count >= 1) {
            document.querySelector('#container_details').value = container.results[0].description;
            containerIsValid = true;
        } else {
            document.querySelector('#container_details').value = document.querySelector('#container_details').value + "\nERROR: No result\n";
            console.log(response);
            containerIsValid = false;
        }
    }

    async function getAssetInfo(assetId) {
        document.querySelector('#asset_id').value = assetId;
        url = '/api/assets?named_id=' + assetId;
        document.querySelector('#asset_details').value = 'Trying ' + url;
        const response = await fetch(url);
        const asset = await response.json();
        if (asset.count >= 1) {
            document.querySelector('#asset_details').value = asset.results[0].description;
            assetIsValid = true;
        } else {
            document.querySelector('#asset_details').value = document.querySelector('#asset_details').value + "\nERROR: No result\n";
            console.log(response);
            assetIsValid = false;
        }
    }

    function useScannedText(msg) {
        // const data = JSON.parse(e.data);
        // msg = String(data.message);
        document.querySelector('#chat-log').value += (msg + '\n');
        if (msg.startsWith('C-')) {
            getContainerInfo(data.message);
            // document.querySelector('#container_id').value = msg;
        } else if (msg.startsWith('A-')) {
            getAssetInfo(data.message);
            // document.querySelector('#asset_id').value = msg;
        } else {
            assetId = 'A-' + msg;
            document.querySelector('#asset_id').value = assetId;
            getAssetInfo(assetId);
        }
    };

    document.querySelector('#clear-chat-area').onclick = function(e) {
        document.querySelector('#chat-log').value = "cleared\n";
    }

    document.querySelector('#book-in-button').onclick = function(e) {
        if (!containerIsValid) {
            msg = 'Cannot book-in as container is invalid';
            console.log(msg);
            document.querySelector('#chat-log').value += ('ERROR: ' + msg + '\n');
            return;
        }
        if (!assetIsValid) {
            msg = 'Cannot book-in as asset is invalid';
            console.log(msg);
            document.querySelector('#chat-log').value += ('ERROR: ' + msg + '\n');
            return;
        }
    }

    document.querySelector('#book-out-button').onclick = function(e) {
        if (!containerIsValid) {
            msg = 'Cannot book-out as container is invalid';
            console.log(msg);
            document.querySelector('#chat-log').value += ('ERROR: ' + msg + '\n');
            return;
        }
        if (!assetIsValid) {
            msg = 'Cannot book-out as asset is invalid';
            console.log(msg);
            document.querySelector('#chat-log').value += ('ERROR: ' + msg + '\n');
            return;
        }
    }

</script>


{% endblock %}