import colormap from 'colormap';

import {
    Vector3,
    Mesh,
    BoxGeometry,
    MeshBasicMaterial,
    Box3,
    Box3Helper,
    Group,
    Plane,
} from 'three';
import { MapControls } from 'three/examples/jsm/controls/MapControls.js';

import Instance from '@giro3d/giro3d/core/Instance.js';
import ColorLayer from '@giro3d/giro3d/core/layer/ColorLayer.js';
import Tiles3D from '@giro3d/giro3d/entities/Tiles3D.js';
import Tiles3DSource from '@giro3d/giro3d/sources/Tiles3DSource.js';
import Inspector from '@giro3d/giro3d/gui/Inspector.js';
import Extent from '@giro3d/giro3d/core/geographic/Extent.js';
import ElevationLayer from '@giro3d/giro3d/core/layer/ElevationLayer.js';
import BilFormat from '@giro3d/giro3d/formats/BilFormat.js';
import Map from '@giro3d/giro3d/entities/Map.js';
import PointCloudMaterial, { MODE } from '@giro3d/giro3d/renderer/PointCloudMaterial.js';
import DrawTool from '@giro3d/giro3d/interactions/DrawTool.js';
import WmtsSource from '@giro3d/giro3d/sources/WmtsSource.js';

/**
 * Create an array of {@link Color}s from the specified colormap preset.
 * @param {string} preset The name of the colormap preset.
 * @param {boolean} [discrete=false] If `true`, the color array will have 10 steps, otherwise 256.
 * @param {boolean} [invert=false] If `true`, the color array will be reversed.
 * @returns {Color[]} The color array.
 */
function makeColorRamp(preset, discrete = false, invert = false, mirror = false) {
    let nshades = discrete ? 10 : 256;

    // eslint-disable-next-line no-undef
    const values = colormap({ colormap: preset, nshades });
    // eslint-disable-next-line no-undef
    const colors = values.map(v => new Color(v));

    if (invert) {
        colors.reverse();
    }

    if (mirror) {
        const mirrored = [...colors, ...colors.reverse()];
        return mirrored;
    }

    return colors;
}

/**
 * Binds a toggle switch or checkbox.
 * @param {string} id The id of the <input> element.
 * @param {(v: boolean) => void} onChange The callback when the dropdown value changes.
 * @returns {(v: boolean) => void} The function to update the value from outside.
 */
function bindToggle(id, onChange) {
    /** @type {HTMLInputElement} */
    const toggle = document.getElementById(id);

    toggle.oninput = function oninput() {
        onChange(toggle.checked);
    };

    return v => {
        toggle.checked = v;
        onChange(toggle.checked);
    };
}

/**
 * Binds a text-value dropdown.
 * @param {string} id The id of the <input> element.
 * @param {(v: string) => void} onChange The callback when the dropdown value changes.
 * @returns {(v: string) => void} The function to update the value from outside.
 */
function bindDropDown(id, onChange) {
    /** @type {HTMLInputElement} */
    const mode = document.getElementById(id);
    mode.onchange = () => {
        onChange(mode.value);
    };

    return v => {
        mode.value = v;
        onChange(mode.value);
    };
}

/**
 * Binds a button.
 * @param {string} id The id of the <button> element.
 * @param {(button: HTMLButtonElement) => void} onClick The click handler.
 * @returns {HTMLButtonElement} The button element.
 */
function bindButton(id, onClick) {
    const element = document.getElementById(id);
    element.onclick = () => {
        onClick(element);
    };

    return element;
}

// Defines projection that we will use (taken from https://epsg.io/2154, Proj4js section)
Instance.registerCRS(
    'EPSG:2154',
    '+proj=lcc +lat_0=46.5 +lon_0=3 +lat_1=49 +lat_2=44 +x_0=700000 +y_0=6600000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs',
);
Instance.registerCRS(
    'IGNF:WGS84G',
    'GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]',
);

const viewerDiv = document.getElementById('viewerDiv');

const instance = new Instance(viewerDiv, { crs: 'EPSG:2154' });

instance.renderingOptions.enableEDL = true;

// Creates controls
const controls = new MapControls(instance.camera.camera3D, instance.domElement);
controls.enableDamping = true;
controls.dampingFactor = 0.2;

instance.useTHREEControls(controls);

const material = new PointCloudMaterial({
    size: 4,
    mode: MODE.ELEVATION,
});

material.colorMap.colors = makeColorRamp('rdbu').reverse();
material.colorMap.min = 200;
material.colorMap.max = 1800;

const pointCloud = new Tiles3D(
    'pointcloud',
    new Tiles3DSource('https://3d.oslandia.com/lidar_hd/tileset.json'),
    {
        material,
    },
);

instance.add(pointCloud);

/**
 * @type {Plane[]}
 */
let planes = null;

let boxSize = 3000;

/**
 * @param {Box3} box The box
 */
function getPlanesFromBoxSides(box) {
    const result = [];

    // Notice that when the plane has a positive normal, the distance to the box must be negated
    result.push(new Plane(new Vector3(0, 0, +1), -box.min.z));
    result.push(new Plane(new Vector3(0, 0, -1), +box.max.z));
    result.push(new Plane(new Vector3(+1, 0, 0), -box.min.x));
    result.push(new Plane(new Vector3(-1, 0, 0), +box.max.x));
    result.push(new Plane(new Vector3(0, +1, 0), -box.min.y));
    result.push(new Plane(new Vector3(0, -1, 0), +box.max.y));

    return result;
}

const extent = new Extent(
    'EPSG:2154',
    902000.3307342547,
    927999.9889373797,
    6444999.999618538,
    6466999.990463264,
);
const options = {
    showHelper: true,
    enableClippingPlanes: true,
    applyOnMap: false,
    showMap: true,
    applyOnPointCloud: true,
    showPointCloud: true,
    mode: 'slice',
};

// create a map
const map = new Map('terrain', {
    extent,
    hillshading: false,
    discardNoData: true,
    doubleSided: true,
});
instance.add(map);

const noDataValue = -1000;

const capabilitiesUrl =
    'https://data.geopf.fr/wmts?SERVICE=WMTS&VERSION=1.0.0&REQUEST=GetCapabilities';

WmtsSource.fromCapabilities(capabilitiesUrl, {
    layer: 'ELEVATION.ELEVATIONGRIDCOVERAGE.HIGHRES',
    format: new BilFormat(),
    noDataValue,
})
    .then(elevationWmts => {
        map.addLayer(
            new ElevationLayer({
                name: 'wmts_elevation',
                extent: map.extent,
                // We don't need the full resolution of terrain because we are not using any shading
                resolutionFactor: 0.25,
                minmax: { min: 0, max: 5000 },
                noDataOptions: {
                    replaceNoData: false,
                },
                source: elevationWmts,
            }),
        );
    })
    .catch(console.error);

WmtsSource.fromCapabilities(capabilitiesUrl, {
    layer: 'HR.ORTHOIMAGERY.ORTHOPHOTOS',
})
    .then(orthophotoWmts => {
        map.addLayer(
            new ColorLayer({
                name: 'wmts_orthophotos',
                extent: map.extent,
                source: orthophotoWmts,
            }),
        );
    })
    .catch(console.error);

const box3 = new Box3();
const center = map.extent.centerAsVector2();
const boxCenter = new Vector3(center.x, center.y, 800);

const volumeHelpers = new Group();
instance.scene.add(volumeHelpers);

/** @type {Box3Helper} */
let helper;
/** @type {Mesh} */
let box;

const helperMaterial = new MeshBasicMaterial({
    color: 'yellow',
    opacity: 0.1,
    transparent: true,
});

function deleteBox() {
    box?.geometry?.dispose();
    box?.removeFromParent();
    helper?.dispose();
    helper?.removeFromParent();
}

function generateBoxHelper() {
    deleteBox();

    box3.setFromCenterAndSize(boxCenter, new Vector3(boxSize, boxSize, boxSize));
    const boxGeometry = new BoxGeometry(boxSize, boxSize, boxSize);
    box = new Mesh(boxGeometry, helperMaterial);
    helper = new Box3Helper(box3, 'yellow');
    box.renderOrder = 2;
    volumeHelpers.add(helper);
    volumeHelpers.add(box);
    box.position.copy(boxCenter);
    box.updateMatrixWorld();
    helper.updateMatrixWorld();
    volumeHelpers.updateMatrixWorld();
}

// refresh scene
instance.notifyChange(instance.camera.camera3D);

function update() {
    volumeHelpers.visible = options.showHelper && options.enableClippingPlanes;
    map.visible = options.showMap;
    pointCloud.visible = options.showPointCloud;
    map.clippingPlanes = options.enableClippingPlanes && options.applyOnMap ? planes : null;
    pointCloud.clippingPlanes =
        options.enableClippingPlanes && options.applyOnPointCloud ? planes : null;
    instance.notifyChange();
}

const updateFromBox = () => {
    generateBoxHelper();
    planes = getPlanesFromBoxSides(box3);

    update();
};

let currentSegment;

bindDropDown('mode', mode => {
    options.mode = mode;
    const volumeOptions = document.getElementById('volume-options');
    const sliceOptions = document.getElementById('slice-options');

    volumeOptions.style.display = 'block';
    sliceOptions.style.display = 'block';

    switch (mode) {
        case 'slice':
            volumeOptions.style.display = 'none';
            planes = [];
            deleteBox();
            update();
            break;
        case 'volume':
            sliceOptions.style.display = 'none';
            if (currentSegment) {
                instance.remove(currentSegment);
                currentSegment = null;
            }
            updateFromBox();
            break;
    }
});

const drawTool = new DrawTool({ instance });
drawTool.addEventListener('start-drag', () => (controls.enabled = false));
drawTool.addEventListener('end-drag', () => (controls.enabled = true));
drawTool.enterEditMode();

bindButton('draw', () => {
    const plane = new Plane();

    if (currentSegment) {
        instance.remove(currentSegment);
        currentSegment = null;
    }

    const updatePlanes = shape => {
        if (shape && shape.points.length === 2) {
            const a = shape.points[0];
            const b = shape.points[1];
            const c = shape.points[1].clone().setZ(b.z + 100);

            plane.setFromCoplanarPoints(a, b, c);

            planes = [plane];

            update();
        }
    };

    drawTool
        .createSegment({
            onTemporaryPointMoved: updatePlanes,
            afterUpdatePoint: ({ shape }) => updatePlanes(shape),
        })
        .then(shape => {
            currentSegment = shape;
            updatePlanes(shape);
        });
});

bindToggle('toggle-show-volume', v => {
    options.showHelper = v;
    updateFromBox();
});

bindToggle('toggle-pointcloud', v => {
    options.applyOnPointCloud = v;
    update();
});

bindToggle('toggle-show-pointcloud', v => {
    options.showPointCloud = v;
    update();
});

bindToggle('toggle-show-map', v => {
    options.showMap = v;
    update();
});

bindToggle('toggle-map', v => {
    options.applyOnMap = v;
    update();
});

const slider = document.getElementById('slider-size');
slider.oninput = function oninput() {
    boxSize = slider.value;
    updateFromBox();
};

Inspector.attach(document.getElementById('panelDiv'), instance);

// configure camera
const lookAt = new Vector3(915833, 6455879, 121);
instance.camera.camera3D.position.set(909914, 6448629, 7925);
instance.camera.camera3D.lookAt(lookAt);
controls.target.copy(lookAt);
controls.saveState();

// Bind events

<!doctype html>
<html lang="en">
    <head>
        <title>Clipping planes</title>
        <meta charset="UTF-8" />
        <meta name="name" content="clipping_planes" />
        <meta name="description" content="Clip various entities with clipping planes." />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />

        <link rel="icon" href="https://giro3d.org/images/favicon.svg" />
        <link href="https://giro3d.org/assets/bootstrap-custom.css" rel="stylesheet" />
        <script src="https://giro3d.org/assets/bootstrap.bundle.min.js"></script>
        <link
            rel="stylesheet"
            type="text/css"
            href="https://giro3d.org/next/css/example.css"
        />

        
    </head>

    <body>
        <div id="viewerDiv" class="m-0 p-0 w-100 h-100"></div>
        <div id="panelDiv" class="position-absolute top-0 start-0 mh-100 overflow-auto"></div>

        <div class="side-pane-with-status-bar">
            <div class="card">
                <div class="card-header">Parameters</div>
                <div class="card-body">
                    <fieldset id="options">
                        <!-- Mode -->
                        <div class="input-group mb-2">
                            <label class="input-group-text" for="mode">Mode</label>
                            <select class="form-select" id="mode" autocomplete="off">
                                <option value="slice" selected>Slice</option>
                                <option value="volume">Volume</option>
                            </select>
                        </div>

                        <div id="volume-options" class="my-3" style="display: none">
                            <div class="form-check form-switch">
                                <input
                                    class="form-check-input"
                                    type="checkbox"
                                    checked="true"
                                    role="switch"
                                    id="toggle-show-volume"
                                    autocomplete="off"
                                />
                                <label class="form-check-label" for="toggle-show-volume">Show volume</label>
                            </div>

                            <label for="slider-size" class="form-label">Volume size</label>
                            <div class="input-group">
                                <input
                                    type="range"
                                    min="1"
                                    max="30000"
                                    value="3000"
                                    step="10"
                                    class="form-range"
                                    id="slider-size"
                                    autocomplete="off"
                                />
                            </div>
                        </div>

                        <div id="slice-options" class="my-3">
                            <button class="btn btn-primary w-100" id="draw">
                                <i class="bi bi-pencil-fill"></i> Draw cross-section
                            </button>
                        </div>

                        <hr />

                        <div class="form-check form-switch">
                            <input
                                class="form-check-input"
                                type="checkbox"
                                checked="true"
                                role="switch"
                                id="toggle-show-map"
                                autocomplete="off"
                            />
                            <label class="form-check-label" for="toggle-show-map">Show Map</label>
                        </div>
                        <div class="form-check form-switch">
                            <input
                                class="form-check-input"
                                type="checkbox"
                                checked="true"
                                role="switch"
                                id="toggle-show-pointcloud"
                                autocomplete="off"
                            />
                            <label class="form-check-label" for="toggle-show-pointcloud"
                                >Show point cloud</label
                            >
                        </div>
                        <div class="form-check form-switch">
                            <input class="form-check-input" type="checkbox" role="switch" id="toggle-map" />
                            <label class="form-check-label" for="toggle-map"
                                >Apply clipping planes on map</label
                            >
                        </div>
                        <div class="form-check form-switch">
                            <input
                                class="form-check-input"
                                type="checkbox"
                                checked="true"
                                role="switch"
                                id="toggle-pointcloud"
                                autocomplete="off"
                            />
                            <label class="form-check-label" for="toggle-pointcloud"
                                >Apply clipping planes on point cloud</label
                            >
                        </div>
                    </fieldset>
                </div>
            </div>
        </div>

        <script type="module" src="index.js"></script>
        <script>
            /* activate popovers */
            const popoverTriggerList = [].slice.call(
                document.querySelectorAll('[data-bs-toggle="popover"]'),
            );
            popoverTriggerList.map(
                // bootstrap is used as script in the template, disable warning about undef
                // eslint-disable-next-line no-undef
                popoverTriggerEl =>
                    new bootstrap.Popover(popoverTriggerEl, {
                        trigger: 'hover',
                        placement: 'left',
                        content: document.getElementById(
                            popoverTriggerEl.getAttribute('data-bs-content'),
                        ).innerHTML,
                        html: true,
                    }),
            );
        </script>
    </body>
</html>

{
    "name": "clipping_planes",
    "dependencies": {
        "@giro3d/giro3d": "git+https://gitlab.com/giro3d/giro3d.git"
    },
    "devDependencies": {
        "vite": "^3.2.3"
    },
    "scripts": {
        "start": "vite",
        "build": "vite build"
    }
}