/* 引入Cesium */
// import * as Cesium from 'Cesium';

/**
 * 分屏
 */
class ViewerSplitScreen {
	/**
	 * 默认初始化
	 */
	constructor() {}
}

/**
 * 通用对外公开函数 
 */
Object.assign(ViewerSplitScreen.prototype, /** @lends ViewerSplitScreen.prototype */ {

	/**
	 * 开启分屏
	 * @param {Object} viewer1 视窗1
	 * @param {Object} viewer2 视窗2
	 */
	initHandler(viewer1, viewer2) {
		var _self = this;
		if (_self.handler1 && _self.handler1.getInputAction(Cesium.ScreenSpaceEventType.MOUSE_MOVE)) {
			return;
		}
		_self.handler1 = new Cesium.ScreenSpaceEventHandler(viewer1.scene.canvas);
		_self.handler2 = new Cesium.ScreenSpaceEventHandler(viewer2.scene.canvas);

		_self.handler1.setInputAction(function(movement) {
			var _camerca = viewer1.camera;
			viewer2.camera.setView({
				destination: _camerca.position,
				orientation: {
					direction: _camerca._direction,
					up: _camerca.up,
					heading: _camerca.heading,
					pitch: _camerca.pitch,
					roll: _camerca.roll
				}
			});
		}, Cesium.ScreenSpaceEventType.MOUSE_MOVE);

		_self.handler1.setInputAction(function(movement) {
			var _camerca = viewer1.camera;
			viewer2.camera.setView({
				destination: _camerca.position,
				orientation: {
					direction: _camerca._direction,
					up: _camerca.up,
					heading: _camerca.heading,
					pitch: _camerca.pitch,
					roll: _camerca.roll
				}
			});
		}, Cesium.ScreenSpaceEventType.WHEEL);


		_self.handler2.setInputAction(function(movement) {
			var _camerca = viewer2.camera;
			viewer1.camera.setView({
				destination: _camerca.position,
				orientation: {
					direction: _camerca._direction,
					up: _camerca.up,
					heading: _camerca.heading,
					pitch: _camerca.pitch,
					roll: _camerca.roll
				}
			});
		}, Cesium.ScreenSpaceEventType.MOUSE_MOVE);

		_self.handler2.setInputAction(function(movement) {
			var _camerca = viewer2.camera;
			viewer1.camera.setView({
				destination: _camerca.position,
				orientation: {
					direction: _camerca._direction,
					up: _camerca.up,
					heading: _camerca.heading,
					pitch: _camerca.pitch,
					roll: _camerca.roll
				}
			});
		}, Cesium.ScreenSpaceEventType.WHEEL);
	},

	/**
	 * 移除分屏效果
	 */
	clearHandler() {
		var _self = this;
		if (_self.handler1) {
			_self.handler1.removeInputAction(Cesium.ScreenSpaceEventType.MOUSE_MOVE);
			_self.handler1.removeInputAction(Cesium.ScreenSpaceEventType.WHEEL);
		}
		if (_self.handler2) {
			_self.handler2.removeInputAction(Cesium.ScreenSpaceEventType.MOUSE_MOVE);
			_self.handler2.removeInputAction(Cesium.ScreenSpaceEventType.WHEEL);
		}
	}
});

export default ViewerSplitScreen;