import zrender from 'zrender';
import Group from 'zrender/src/container/Group';
import deviceType from './config/deviceType';
import shapefactory from './shape/factory';

const renderer = 'svg';
const devicePixelRatio = 2;

class Painter {
    constructor(jamp, opts) {
        // 父级实例
        this.$jamp = jamp;

        // zrender实例
        this.$zr = null;

        // 图层数据
        this.viewLevelMap = {};

        // 视图数据
        this.viewInstance = {};

        // 父级图层
        this.parentLevel = new Group({ name: '__parent__' });

        // 挂载视图
        this.mount(opts.dom, Object.assign({ renderer, devicePixelRatio, width: opts.dom.width, height: opts.dom.clientHeight }, opts.config));
    }

    /**
     * 挂载视图
     * @param {*} dom 
     * @param {*} config 
     */
    mount(dom, config) {
        // 挂载页面视图
        this.$zr = zrender.init(dom, config);

        // 添加父级图层
        this.$zr.add(this.parentLevel);

        // 添加子级图层
        Object.values(deviceType).forEach(type => {
            let level = new Group({ name: `__${type}__` })
            this.viewLevelMap[type] = level;
            this.parentLevel.add(level);
        })
    }

    /**
     * 初次渲染视图
     * @param {*} mapDevice 
     */
    render(mapDevice, styleDict) {
        // 清空视图
        this.viewInstance = {};

        // 清空图层
        Object.values(this.viewLevelMap).forEach(level => {
            level && level.removeAll();
        })

        // 创建视图
        Object.values(mapDevice).forEach(device => {
            device && this.add(device, styleDict);
        })
    }

    /**
     * 添加视图
     * @param {*} device 
     */
    add(device, styleDict) {
        let type = device._type;
        let code = device._code;
        let view = shapefactory(type, device, styleDict);
        if (view) {
            this.viewInstance[code] = view;
            this.viewLevelMap[type].add(view);
        }
    }

    /**
     * 删除视图
     * @param {*} device 
     */
    delete(device) {
        let code = device._code;
        let type = device._type;
        let view = this.viewInstance[code];
        if (view) {
            this.viewLevelMap[type].remove(view);
            delete this.viewInstance[code];
        }
    }

    /**
     * 更新视图
     * @param {*} device 
     */
    update(device) {
        let code = device._code;
        let view = this.viewInstance[code];
        if (view) {
            view.setStatus(device);
        }
    }

    /**
     * 清除所有对象和画布
     */
    clear() {
        this.$zr && this.$zr.clear();
    }

    /**
    * 销毁 ZRender 实例
    */
    dispose() {
        this.$zr && zrender.dispose(this.$zr);
        this.$zr = null;
        this.viewInstance = {};
        this.viewLevelMap = {};
    }
}

export default Painter;