import * as zrUtil from 'zrender/src/core/util';
import zrender from 'zrender';
import Painter from './painter';
import Options from './options';
import MouseController from './mouseController';
import deviceState from './constant/deviceState';
import { selectSkinStyle } from './config/deviceStyle';
import deviceType from './constant/deviceType';
import { parser, deviceFactory } from './utils/parser';

const renderer = 'canvas';
const devicePixelRatio = 2;

class Jmap {
	constructor(opts) {
		// 回调事件
		this.methods = opts.methods;

		// 鼠标事件
		this.events = { Pan: 'pan', Zoom: 'zoom', Selected: 'selected', Contextmenu: 'contextmenu' };

		// 原始数据
		this.data = {};

		// 皮肤参数
		this.skinStyle = '';

		// 皮肤风格
		this.styleDict = {};

		// 设备数据
		this.mapDevice = {};

		// 默认状态
		this.defaultStateDict = this.loadDefaultState();

		this.initMapInstance(opts);
	}

	// 初始化属性有鼠标事件 缩放等
	initMapInstance(opts) {
		const width = opts.dom.clientWidth;
		const height = opts.dom.clientHeight;

		this.optionsHandler = this.setOptions.bind(this);

		this.$zr = zrender.init(opts.dom, Object.assign({ renderer, devicePixelRatio, width, height }, opts.config));

		this.$options = new Options(Object.assign({ scaleRate: 1, offsetX: 0, offsetY: 0 }, opts.options || {})); // 缩放

		this.$painter = new Painter(this); // 绘画层
		this.$painter.updateZoomTransform(this.$options);

		this.$mouseController = new MouseController(this);
		this.$mouseController.enable();

		this.$mouseController.on(this.events.Pan, this.optionsHandler);
		this.$mouseController.on(this.events.Zoom, this.optionsHandler);
	}

	load(data) {
		// 保存皮肤类型
		this.skinStyle = data.skinVO.code;

		// 保存原始数据
		this.data = data;

		// 加载对应皮肤
		this.styleDict = this.loadStyle(this.skinStyle);

		// 解析地图数据
		this.mapDevice = parser(data, this);

		// 数据加载完成 回调
		if (this.methods.dataLoaded instanceof Function) { this.methods.dataLoaded(); }

		// 初次渲染视图
		this.$painter.repaint(this.mapDevice);

		// 视图加载完成 回调
		if (this.methods.viewLoaded instanceof Function) { this.methods.viewLoaded(); }
	}

	loadStyle(skinStyle) {
		return selectSkinStyle(skinStyle);
	}

	loadDefaultState() {
		const defaultStateDict = {};

		zrUtil.each(Object.keys(deviceState), (type) => {
			defaultStateDict[type] = {};
			zrUtil.each(Object.keys(deviceState[type] || {}), (state) => {
				defaultStateDict[type][state] = deviceState[type][state].Default;
			});
		});

		return defaultStateDict;
	}

	setDefaultState() {
		const list = [];

		Object.values(this.mapDevice).forEach(elem => {
			const code = elem._code;
			const type = elem._type;
			list.push(Object.assign({ code, type }, this.defaultStateDict[type]));
		});

		this.update(list);

		if (this.methods.stateLoaded instanceof Function) { this.methods.stateLoaded(); }
	}

	pullBack(payload) {
		if (payload.type === 'zoom') {
			const zrWidth = this.$zr.getWidth();
			const zrHeight = this.$zr.getHeight();
			const originX = this.$options.zoomOnMouseWheel ? payload.originX : zrWidth / 2;
			const originY = this.$options.zoomOnMouseWheel ? payload.originY : zrHeight / 2;
			const x = (this.$options.offsetX + originX) / this.$options.scaleRate;
			const y = (this.$options.offsetY + originY) / this.$options.scaleRate;
			const newScaleRate = this.$options.getScaleRate(payload.scale);
			const dx = originX - (x * newScaleRate - this.$options.offsetX);
			const dy = originY - (y * newScaleRate - this.$options.offsetY);
			payload.dx = dx;
			payload.dy = dy;
		}

		return payload || {};
	}

	setOptions(zoom) {
		this.$options.update(this.pullBack(zoom));
		this.$painter.updateZoomTransform(this.$options);
		if (this.methods.optionsUpdate instanceof Function) { this.methods.optionsUpdate(); }
	}

	setLevelVisible(list, show) {
		this.$painter.setLevelVisible(list, show);
	}

	render(list) {
		(list || []).forEach(elem => {
			const type = elem.type;
			const code = elem.code;
			const oDevice = this.mapDevice[code] || deviceFactory(type, this.styleDict[type], elem);
			const model = Object.assign(oDevice.model || {}, elem);
			this.dataSync(model, model._dispose, !this.mapDevice[code]);
			this.$painter.delete(oDevice);
			if (!elem._dispose) {
				const nDevice = Object.assign(oDevice, { model });
				this.mapDevice[code] = nDevice;
				this.$painter.add(nDevice);
			}
		});

		if (this.methods.viewUpdate instanceof Function) { this.methods.viewUpdate(); }
	}

	update(list) {
		(list || []).forEach(elem => {
			const code = elem.code;
			const oDevice = this.mapDevice[code] || {};
			if (elem._dispose) {
				this.$painter.delete(oDevice);
			} else {
				const state = Object.assign(oDevice.state || {}, elem);
				const nDevice = Object.assign(oDevice, { state });
				this.mapDevice[code] = nDevice;
				this.$painter.update(nDevice);
			}
		});

		if (this.methods.stateUpdate instanceof Function) { this.methods.stateUpdate(); }
	}

	dataSync(model, isDel, isAdd) {
		const code = model.code;
		const type = model.type;

		let prop = null;
		switch (type) {
		case deviceType.Link: prop = 'linkList'; break;
		case deviceType.Sction: prop = 'sectionList'; break;
		case deviceType.Switch: prop = 'switchList'; break;
		case deviceType.Signal: prop = 'signalList'; break;
		case deviceType.Station: prop = 'stationList'; break;
		case deviceType.StationStand: prop = 'stationStandList'; break;
		case deviceType.StationControl: prop = 'stationControlList'; break;
		case deviceType.StationCounter: prop = 'stationCounterList'; break;
		case deviceType.ZcControl: prop = 'zcControlList'; break;
		case deviceType.StationDelayUnlock: prop = 'stationDelayUnlockList'; break;
		case deviceType.LcControl: prop = 'lcControlList'; break;
		case deviceType.LimitControl: prop = 'tempSpeedLimitList'; break;
		case deviceType.ImageControl: prop = 'imageControl'; break;
		case deviceType.Train: prop = 'trainList'; break;
		case deviceType.TrainWindow: prop = 'trainWindowList'; break;
		case deviceType.Line: prop = 'lineList'; break;
		case deviceType.Text: prop = 'textList'; break;
		}

		const list = this.data[prop];
		if (list) {
			if (isAdd) {
				list.push(model);
			}
			if (isDel) {
				const idex = list.findIndex(elem => { return elem.code == code; });
				if (idex >= 0) {
					list.splice(idex, 1);
				}
			}
		}
	}

	getZr() {
		return this.$zr;
	}

	getPainter() {
		return this.$painter;
	}

	getEvents() {
		return this.events;
	}

	getSkinStyle() {
		return this.skinStyle;
	}

	getStyleDict() {
		return this.styleDict;
	}

	getDefaultStateDict() {
		return this.defaultStateDict;
	}

	getMapDevice() {
		return this.mapDevice;
	}

	getDeviceByCode(code) {
		return this.mapDevice[code];
	}

	refresh() {
		this.$painter.refresh();
	}

	clear() {
		this.$painter.clear();
	}

	dispose() {
		this.off(this.events.Pan, this.optionsHandler);
		this.off(this.events.Zoom, this.optionsHandler);

		this.skinStyle = '';
		this.styleDict = {};
		this.mapDevice = {};

		this.$mouseController.dispose();
		this.$zr && zrender.dispose(this.$zr);
		this.$painter.dispose();
	}

	on(eventname, cb, context) {
		const idx = Object.values(this.events).indexOf(eventname);
		if (idx >= 0) {
			switch (eventname) {
			case this.events.Selected: {
				this.$mouseController.on(this.events.Selected, cb, context);
				break;
			}
			case this.events.Contextmenu: {
				this.$mouseController.on(this.events.Contextmenu, cb, context);
				break;
			}
			}
		}
	}

	off(eventname, cb) {
		const idx = Object.values(this.events).indexOf(eventname);
		if (idx >= 0) {
			switch (eventname) {
			case this.events.Selected: {
				this.$mouseController.off(this.events.Selected, cb);
				break;
			}
			case this.events.Contextmenu: {
				this.$mouseController.off(this.events.Contextmenu, cb);
				break;
			}
			}
		}
	}

}

export default Jmap;