/**
 * @module olcs.RasterSynchronizer
 */
import Map from 'ol/Map';
import { getUid, stableSort } from './util.js';
import olcsAbstractSynchronizer from './AbstractSynchronizer';
import { tileLayerToImageryLayer, updateCesiumLayerProperties } from './core';
import BaseVectorLayer from 'ol/layer/BaseVector';
import LayerGroup from 'ol/layer/Group.js';
class RasterSynchronizer extends olcsAbstractSynchronizer {
    cesiumLayers_;
    ourLayers_;
    /**
     * This object takes care of one-directional synchronization of
     * Openlayers raster layers to the given Cesium globe.
     */
    constructor(map, scene) {
        super(map, scene);
        this.cesiumLayers_ = scene.imageryLayers;
        this.ourLayers_ = new Cesium.ImageryLayerCollection();
    }
    addCesiumObject(object) {
        this.cesiumLayers_.add(object);
        this.ourLayers_.add(object);
    }
    destroyCesiumObject(object) {
        object.destroy();
    }
    removeSingleCesiumObject(object, destroy) {
        this.cesiumLayers_.remove(object, destroy);
        this.ourLayers_.remove(object, false);
    }
    removeAllCesiumObjects(destroy) {
        for (let i = 0; i < this.ourLayers_.length; ++i) {
            this.cesiumLayers_.remove(this.ourLayers_.get(i), destroy);
        }
        this.ourLayers_.removeAll(false);
    }
    /**
     * Creates an array of Cesium.ImageryLayer.
     * May be overriden by child classes to implement custom behavior.
     * The default implementation handles tiled imageries in EPSG:4326 or
     * EPSG:3859.
     */
    convertLayerToCesiumImageries(olLayer, viewProj) {
        const result = tileLayerToImageryLayer(this.map, olLayer, viewProj);
        return result ? [result] : null;
    }
    createSingleLayerCounterparts(olLayerWithParents) {
        const olLayer = olLayerWithParents.layer;
        const uid = getUid(olLayer).toString();
        const viewProj = this.view.getProjection();
        console.assert(viewProj);
        const cesiumObjects = this.convertLayerToCesiumImageries(olLayer, viewProj);
        if (cesiumObjects) {
            const listenKeyArray = [];
            [olLayerWithParents.layer].concat(olLayerWithParents.parents).forEach((olLayerItem) => {
                listenKeyArray.push(olLayerItem.on(['change:opacity', 'change:visible'], () => {
                    // the compiler does not seem to be able to infer this
                    console.assert(cesiumObjects);
                    for (let i = 0; i < cesiumObjects.length; ++i) {
                        updateCesiumLayerProperties(olLayerWithParents, cesiumObjects[i]);
                    }
                }));
            });
            if (olLayer instanceof BaseVectorLayer) {
                let previousStyleFunction = olLayer.getStyleFunction();
                // there is no convenient way to detect a style function change in OL
                listenKeyArray.push(olLayer.on('change', () => {
                    const currentStyleFunction = olLayer.getStyleFunction();
                    if (previousStyleFunction === currentStyleFunction) {
                        return;
                    }
                    previousStyleFunction = currentStyleFunction;
                    for (let i = 0; i < cesiumObjects.length; ++i) {
                        const csObj = cesiumObjects[i];
                        // clear cache and set new style
                        // @ts-ignore TS2341
                        if (csObj._imageryCache) {
                            // @ts-ignore TS2341
                            csObj._imageryCache = {};
                        }
                        const ip = csObj.imageryProvider;
                        if (ip) {
                            // @ts-ignore TS2341
                            ip.tileCache?.clear();
                            // @ts-ignore TS2341
                            ip.styleFunction_ = currentStyleFunction;
                        }
                    }
                    this.scene.requestRender();
                }));
            }
            for (let i = 0; i < cesiumObjects.length; ++i) {
                updateCesiumLayerProperties(olLayerWithParents, cesiumObjects[i]);
            }
            // there is no way to modify Cesium layer extent,
            // we have to recreate when OpenLayers layer extent changes:
            listenKeyArray.push(olLayer.on('change:extent', (e) => {
                for (let i = 0; i < cesiumObjects.length; ++i) {
                    this.cesiumLayers_.remove(cesiumObjects[i], true); // destroy
                    this.ourLayers_.remove(cesiumObjects[i], false);
                }
                delete this.layerMap[getUid(olLayer)]; // invalidate the map entry
                this.synchronize();
            }));
            listenKeyArray.push(olLayer.on('change', (e) => {
                // when the source changes, re-add the layer to force update
                for (let i = 0; i < cesiumObjects.length; ++i) {
                    const position = this.cesiumLayers_.indexOf(cesiumObjects[i]);
                    if (position >= 0) {
                        this.cesiumLayers_.remove(cesiumObjects[i], false);
                        this.cesiumLayers_.add(cesiumObjects[i], position);
                    }
                }
            }));
            this.olLayerListenKeys[uid].push(...listenKeyArray);
        }
        return Array.isArray(cesiumObjects) ? cesiumObjects : null;
    }
    /**
     * Order counterparts using the same algorithm as the Openlayers renderer:
     * z-index then original sequence order.
     * @override
     * @protected
     */
    orderLayers() {
        const layers = [];
        const zIndices = {};
        const queue = [this.mapLayerGroup];
        while (queue.length > 0) {
            const olLayer = queue.splice(0, 1)[0];
            layers.push(olLayer);
            zIndices[getUid(olLayer)] = olLayer.getZIndex() || 0;
            if (olLayer instanceof LayerGroup) {
                const sublayers = olLayer.getLayers();
                if (sublayers) {
                    // Prepend queue with sublayers in order
                    queue.unshift(...sublayers.getArray());
                }
            }
        }
        stableSort(layers, (layer1, layer2) => zIndices[getUid(layer1)] - zIndices[getUid(layer2)]);
        layers.forEach((olLayer) => {
            const olLayerId = getUid(olLayer).toString();
            const cesiumObjects = this.layerMap[olLayerId];
            if (cesiumObjects) {
                cesiumObjects.forEach((cesiumObject) => { this.raiseToTop(cesiumObject); });
            }
        });
    }
    raiseToTop(counterpart) {
        this.cesiumLayers_.raiseToTop(counterpart);
    }
}
export default RasterSynchronizer;
