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<!DOCTYPE html>
<html>

<head>
    <title>Joe BBOX Finder</title>
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css" rel="stylesheet"
        integrity="sha384-1BmE4kWBq78iYhFldvKuhfTAU6auU8tT94WrHftjDbrCEXSU1oBoqyl2QvZ6jIW3" crossorigin="anonymous">
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.8.1/font/bootstrap-icons.css">
    <link rel="stylesheet" href="libs/leaflet.css" />
    <link rel="stylesheet" href="./src/leaflet.draw.css" />

    <script src="libs/leaflet-src.js"></script>

    <script src="./src/Leaflet.draw.js"></script>
    <script src="./src/Leaflet.Draw.Event.js"></script>

    <script src="./src/edit/handler/Edit.Poly.js"></script>
    <script src="./src/edit/handler/Edit.SimpleShape.js"></script>
    <script src="./src/edit/handler/Edit.Rectangle.js"></script>
    <script src="./src/edit/handler/Edit.Marker.js"></script>
    <script src="./src/edit/handler/Edit.CircleMarker.js"></script>
    <script src="./src/edit/handler/Edit.Circle.js"></script>

    <script src="./src/draw/handler/Draw.Feature.js"></script>
    <script src="./src/draw/handler/Draw.Polyline.js"></script>
    <script src="./src/draw/handler/Draw.Polygon.js"></script>
    <script src="./src/draw/handler/Draw.SimpleShape.js"></script>
    <script src="./src/draw/handler/Draw.Rectangle.js"></script>
    <script src="./src/draw/handler/Draw.Circle.js"></script>
    <script src="./src/draw/handler/Draw.Marker.js"></script>
    <script src="./src/draw/handler/Draw.CircleMarker.js"></script>

    <script src="./src/ext/TouchEvents.js"></script>
    <script src="./src/ext/LatLngUtil.js"></script>
    <script src="./src/ext/GeometryUtil.js"></script>
    <script src="./src/ext/LineUtil.Intersect.js"></script>
    <script src="./src/ext/Polyline.Intersect.js"></script>
    <script src="./src/ext/Polygon.Intersect.js"></script>

    <script src="./src/Control.Draw.js"></script>
    <script src="./src/Tooltip.js"></script>
    <script src="./src/Toolbar.js"></script>

    <script src="./src/draw/DrawToolbar.js"></script>
    <script src="./src/edit/EditToolbar.js"></script>
    <script src="./src/edit/handler/EditToolbar.Edit.js"></script>
    <script src="./src/edit/handler/EditToolbar.Delete.js"></script>
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    <link rel="shortcut icon" href="joeicon.png" />
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</head>

<body>
    <style>
        .calculation-box {
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            min-height: 90 px;
            height: auto;
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            width: 600px;
            position: absolute;
            bottom: 25px;
            left: 25px;
            background-color: rgba(255, 255, 255, 0.9);
            padding: 15px;
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            /* text-align: center; */
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            z-index: 1000;
        }

        p {
            /* font-family: 'Open Sans'; */
            margin: 0;
            font-size: 13px;
            font-weight: 600;
        }
    </style>
    <div id="map" style="width: 100%; height: 100vh;"></div>
    <div class="calculation-box text-left">
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        <p class="text-bold text-wrap"> <b>
                <img src="joeicon.png" alt="" width="20px">
                BBOX Finder <i class="bi bi-bounding-box"></i></b>
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            <br>
            <span id="calculated_area">[Hint: Draw a bbox using tool on the right-bottom menu.]</span>
        </p>
    </div>
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/js/bootstrap.bundle.min.js"
        integrity="sha384-ka7Sk0Gln4gmtz2MlQnikT1wXgYsOg+OMhuP+IlRH9sENBO0LRn5q+8nbTov4+1p" crossorigin="anonymous">
    </script>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
    <script src="./libs/proj4js.min.js"></script>
    <script>
        var Stadia_Outdoors = L.tileLayer('https://tiles.stadiamaps.com/tiles/outdoors/{z}/{x}/{y}{r}.png', {
            maxZoom: 20,
            attribution: '&copy; <a href="https://stadiamaps.com/">Stadia Maps</a>, &copy; <a href="https://openmaptiles.org/">OpenMapTiles</a> &copy; <a href="http://openstreetmap.org">OpenStreetMap</a> contributors'
        });
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        var Esri_WorldTopoMap = L.tileLayer(
            'https://server.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer/tile/{z}/{y}/{x}', {
                attribution: 'Tiles &copy; Esri &mdash; Esri, DeLorme, NAVTEQ, TomTom, Intermap, iPC, USGS, FAO, NPS, NRCAN, GeoBase, Kadaster NL, Ordnance Survey, Esri Japan, METI, Esri China (Hong Kong), and the GIS User Community'
            });
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        var tmp_layer
        var osmUrl = 'http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png',
            osmAttrib = '&copy; <a href="http://openstreetmap.org/copyright">OpenStreetMap</a> contributors',
            osm = L.tileLayer(osmUrl, {
                maxZoom: 18,
                attribution: osmAttrib
            }),
            map = new L.Map('map', {
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                layers: [Esri_WorldTopoMap],
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                center: new L.LatLng(48.7758, 9.1829),
                zoom: 15
            });

        var drawnItems = new L.FeatureGroup();
        map.addLayer(drawnItems);

        // Set the title to show on the polygon button
        L.drawLocal.draw.toolbar.buttons.polygon = 'Draw a polygon!';

        var drawControl = new L.Control.Draw({
            position: 'bottomright',
            draw: {
                polyline: false,
                polygon: false,
                circle: false,
                marker: false,
                circlemarker: false

            },
            edit: {
                featureGroup: drawnItems,
                remove: true
            }
        });
        map.addControl(drawControl);

        map.on(L.Draw.Event.CREATED, function (e) {
            if (tmp_layer !== undefined) {
                try {
                    map.removeLayer(tmp_layer)
                } catch (error) {}
            }
            var type = e.layerType,
                layer = e.layer;
            tmp_layer = layer
            if (type === 'marker') {
                layer.bindPopup('A popup!');
            }

            drawnItems.addLayer(layer);
            const answer = document.getElementById('calculated_area');
            // $("#")
            var source = new proj4.Proj('EPSG:4326'); //source coordinates will be in Longitude/Latitude
            proj4.defs("EPSG:31463",
                "+proj=tmerc +lat_0=0 +lon_0=9 +k=1 +x_0=3500000 +y_0=0 +ellps=bessel +towgs84=598.1,73.7,418.2,0.202,0.045,-2.455,6.7 +units=m +no_defs"
            );
            var dest = new proj4.Proj('EPSG:31463'); //source coordinates will be in Longitude/Latitude

            var p_min = new proj4.toPoint([tmp_layer._bounds._southWest.lng, tmp_layer._bounds._southWest
                .lat
            ]); //any object will do as long as it has 'x' and 'y' properties
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            var p_max = new proj4.toPoint([tmp_layer._bounds._northEast.lng, tmp_layer._bounds._northEast
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                .lat
            ]); //any object will do as long as it has 'x' and 'y' properties
            p_dest_min = proj4.transform(source, dest,
                p_min); //do the transformation.  x and y are modified in place
            p_dest_max = proj4.transform(source, dest,
                p_max); //do the transformation.  x and y are modified in place
            answer.innerHTML = `
                BBOX (4326):
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                <input type="text" value="${tmp_layer._bounds._southWest.lng.toFixed(10)},${tmp_layer._bounds._southWest.lat.toFixed(10)},${tmp_layer._bounds._northEast.lng.toFixed(10)},${tmp_layer._bounds._northEast.lat.toFixed(10)}" id="4326" size="60">
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                <button class="badge bg-secondary" onclick="clickToCopy('4326')">click to copy</button>

                <br>
                
                BBOX (31463): 
                <input type="text" value="${p_dest_min.x.toFixed(4)},${p_dest_min.y.toFixed(4)},${p_dest_max.x.toFixed(4)},${p_dest_max.y.toFixed(4)}" id="31463" size="60">
                <button class="badge bg-secondary" onclick="clickToCopy('31463')">click to copy</button>
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                <hr>

                Try other epsg:
                <input type="number" placeholder="e.g. 31464, 3857" id="input_epsg"/> <button class="badge bg-secondary" onclick="convert_epsg()">convert</button>

                <span id="conversion_result"></span>
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                `;

        });

        map.on(L.Draw.Event.EDITED, function (e) {
            var layers = e.layers;
            var countOfEditedLayers = 0;
            layers.eachLayer(function (layer) {
                countOfEditedLayers++;
            });
            console.log("Edited " + countOfEditedLayers + " layers");
        });

        function clickToCopy(id) {
            /* Get the text field */
            var copyText = document.getElementById(id);

            /* Select the text field */
            copyText.select();
            copyText.setSelectionRange(0, 99999); /* For mobile devices */

            /* Copy the text inside the text field */
            navigator.clipboard.writeText(copyText.value);

            /* Alert the copied text */
            alert("BBox Copied:<br>" + copyText.value);
        }
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        function convert_epsg() {
            var input_epsg= $("#input_epsg").val()
            var bbox_latlng =
                `${tmp_layer._bounds._southWest.lng},${tmp_layer._bounds._southWest.lat};${tmp_layer._bounds._northEast.lng},${tmp_layer._bounds._northEast.lat}`
            var conversion_service =
                `https://epsg.io/trans?data=${bbox_latlng}&s_srs=4326&t_srs=${input_epsg}`
            console.log(`request to ${conversion_service}...`)
            $.getJSON(conversion_service, function (data) {
                if (data.status) {
                    $("#conversion_result").html("ESPG Code not support or invalid EPSG Code.")
                } else {
                    var result = `
                        <br>
                        BBOX (${input_epsg}): 
                        <input type="text" value="${parseFloat(data[0]["x"]).toFixed(4)}, ${parseFloat(data[0]["y"]).toFixed(4)},${parseFloat(data[1]["x"]).toFixed(4)}, ${parseFloat(data[1]["y"]).toFixed(4)}" id="${input_epsg}" size="60">
                        <button class="badge bg-secondary" onclick="clickToCopy('31463')">click to copy</button>
                        `
                    $("#conversion_result").html(result)
                    
                }
            });
        }
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    </script>
</body>

</html>

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