import deviceType from './constant/deviceType';
import Eventful from 'zrender/src/mixin/Eventful';
import * as eventTool from 'zrender/src/core/event';
import store from '@/store/index_APP_TARGET';

class EventModel {
    constructor(e) {
        this.clientX = e.event.clientX;
        this.clientY = e.event.clientY;

        let view = e.target;
        while (view) {
            if (Object.values(deviceType).includes(view._type)) {
                this.deviceCode = view._code;
                this.deviceType = view._type;
                this.eventTarget = view;
                break;
            }

            if (view._subType) {
                this.subType = view._subType;
            }
            if (view._val) {
                this.val = view._val;
            }

            view = view.parent;
        }
    }
}

class MouseController extends Eventful {
    constructor(jmap) {
        super();
        this.$jmap = jmap;
        this.deviceList = [];
        this.rightClickPoint = { x: 0, y: 0 }; // 右键点击坐标
        this.$zr = jmap.getZr();
        this.events = jmap.getEvents();
        this.initHandler(this.$zr);
    }

    initHandler(zr) {
        if (zr) {
            zr.on('click', this.click, this);
            zr.on('contextmenu', this.contextmenu, this);
            zr.on('mousemove', this.moveEvent, this);

            this.enable = function (opts) {
                opts = opts || {};
                this._moveOnMouseMove = opts.moveOnMouseMove || true;
                this._zoomOnMouseWheel = opts.zoomOnMouseWheel || false;
                this._preventDefaultMouseMove = opts.preventDefaultMouseMove || true;
                this._previewOrMapDraw = opts.previewOrMapDraw || false;

                this.disable();

                zr.on('mousedown', this.mousedown, this);
                zr.on('mousemove', this.mousemove, this);
                zr.on('mouseup', this.mouseup, this);
                zr.on('mousewheel', this.mousewheel, this);
            };

            this.disable = function () {
                zr.off('mousedown', this.mousedown);
                zr.off('mousemove', this.mousemove);
                zr.off('mouseup', this.mouseup);
                zr.off('mousewheel', this.mousewheel);
            };

            this.dispose = function () {
                zr.off('click', this.click);
                zr.off('contextmenu', this.contextmenu);
                zr.off('mousemove', this.moveEvent);
                this.disable();
            };

            this.isDragging = function () { return this._dragging; };
        }
    }

    mousedown(e) {
        // if (eventTool.notLeftMouse(e)) {
        //     return;
        // }
        this.$zr.dom.focus();
        if (e.which == 1 || e.which == 3) {
            var x = e.offsetX;
            var y = e.offsetY;

            this._x = x;
            this._y = y;
            this._dragging = true;
            if (e.which == 3 && this._zoomOnMouseWheel) {
                this.handleMouseDownRight(e);
            } else if (e.which == 1 && this._zoomOnMouseWheel) {
                this.handleMouseDownLeft(e);
            }
        }
    }

    mousemove(e) {
        // if (eventTool.notLeftMouse(e) ||
        // 	!this._moveOnMouseMove ||
        // 	!this._dragging
        // ) {
        //     return;
        // }

        const oldX = this._x;
        const oldY = this._y;

        const dx = e.offsetX - oldX;
        const dy = e.offsetY - oldY;

        this._x = e.offsetX;
        this._y = e.offsetY;

        if (e.which == 1) {
            this._preventDefaultMouseMove && eventTool.stop(e.event);

            this.trigger(this.events.__Pan, { dx, dy, oldX, oldY, newX: this._x, newY: this._y });
        } else if (e.which === 3 && this._zoomOnMouseWheel && this._previewOrMapDraw) {
            this.handleMouseMoveRight({x: e.offsetX, y: e.offsetY});
        }
    }

    mouseup(e) {
        if (!eventTool.notLeftMouse(e)) {
            this._dragging = false;
        }
        if (this._zoomOnMouseWheel && this.$jmap.mapDevice['check_box'] && this._previewOrMapDraw ) {
            this.eventTarget = this.$jmap.mapDevice['check_box'].instance;
            this.handleBoundingRect(this.eventTarget);
            var em = this.checkEvent(e);
            this.trigger(this.events.Selected, em);
        }
    }

    mousewheel(e) {
        const shouldZoom = this._zoomOnMouseWheel;
        const wheelDelta = e.wheelDelta;
        const originX = e.offsetX;
        const originY = e.offsetY;

        if (wheelDelta === 0 || !shouldZoom) {
            return;
        }

        if (shouldZoom) {
            eventTool.stop(e.event);
            let scale = 1;
            if (wheelDelta > 0) {
                scale = 1;
            } else if (wheelDelta < 0) {
                scale = -1;
            }

            this.trigger(this.events.__Zoom, {type: this.events.__Zoom, scale, originX, originY });
        }
    }

    click(e) {
        var em = this.checkEvent(e);
        this.trigger(this.events.Selected, em);
    }

    contextmenu(e) {
        var em = this.checkEvent(e);
        this.trigger(this.events.Contextmenu, em);
    }

    moveEvent(e) {
        const newEm = new EventModel(e);
        const trainDetails = store.state.map.trainDetails; // 获取当前拿到train详情 对比 移除
        if (trainDetails) {
            if (newEm.deviceType != deviceType.Train || trainDetails.code != newEm.deviceCode) {
                var instance = (this.$jmap.getDeviceByCode(trainDetails.code) || {} ).instance;
                instance && instance.removeTrainDetail && instance.removeTrainDetail();
            }
        }
    }

    checkEvent(e) {
        var oldEm = new EventModel(this.$zr.curEvent || { event: {} });
        var newEm = new EventModel(e);
        if ([1, 3].includes(e.which)) {
            // 查找之前和当前鼠标选中的实例
            var oldDevice = this.$jmap.getDeviceByCode(oldEm.deviceCode) || {};
            var newDevice = this.$jmap.getDeviceByCode(newEm.deviceCode) || {};
            var oldInstance = (this.$jmap.getDeviceByCode(oldEm.deviceCode) || {}).instance || {};
            var newInstance = (this.$jmap.getDeviceByCode(newEm.deviceCode) || {}).instance || {};

            // 如果之前和当前选中的实例不一致
            if (oldInstance != newInstance) {
                // 如果实例有取消选择函数并且被点击，则执行取消选中函数
                if (oldInstance.mouseEvent && oldInstance.mouseEvent.mouseout) {
                    // 视图数据设置点击标志，同步执行
                    oldDevice['down'] = false;
                    oldInstance.mouseEvent['mouseout'](e);
                }

                // 如果实例有选中函数并且被点击，则执行选中函数
                if (e.which == 3 && newInstance.mouseEvent && newInstance.mouseEvent.mouseover) {
                    newDevice['down'] = true;
                    newInstance.mouseEvent['mouseover'](e);
                }
            }

            // 保存当前实例到全局
            this.$zr.curEvent = e;
        }

        return newEm;
    }

    // 处理鼠标右键按下事件
    handleMouseDownRight(e) {
        this.rightClickPoint.x = e.offsetX;
        this.rightClickPoint.y = e.offsetY;
    }
    // 处理鼠标左键按下事件
    handleMouseDownLeft(e) {
        const em = new EventModel(e);
        this.eventTarget = em.eventTarget;
        if (this.eventTarget && this.eventTarget._type === deviceType.CheckBox) {
            this.handleBoundingRect(this.eventTarget);
        } else {
            this.$jmap.deleteCheckBox('check_box');
            this.eventTarget = '';
            this.deviceList = [];
        }
    }
    // 通过包围盒筛选选中区域的元素
    handleBoundingRect(eventTarget) {
        this.deviceList = [];
        const boundingRect = this.createFakeBoundingRect(eventTarget);
        const deviceList = Object.values(this.$jmap.mapDevice);
        const includeDeviceList = [];
        deviceList.forEach( item =>{
            if (item.instance && item.instance._type == deviceType.Section) {
                let deviceBoundingRect = {};
                if (item.type == '04') {
                    deviceBoundingRect = {
                        x1: item.namePosition.x,
                        y1: item.namePosition.y,
                        x2: item.namePosition.x,
                        y2: item.namePosition.y
                    };
                } else {
                    deviceBoundingRect = {
                        x1: item.points[0].x,
                        y1: item.points[0].y,
                        x2: item.points[item.points.length - 1].x,
                        y2: item.points[item.points.length - 1].y
                    };
                }
                if (this.whetherInclude(boundingRect, deviceBoundingRect )) {
                    includeDeviceList.push(item);
                }
            }
            if (item.instance && item.instance._type == deviceType.Switch) {
                const deviceBoundingRect = {
                    x1: item.intersection.x,
                    y1: item.intersection.y,
                    x2: item.intersection.x,
                    y2: item.intersection.y
                };
                if (this.whetherInclude(boundingRect, deviceBoundingRect )) {
                    includeDeviceList.push(item);
                }
            }
            if (item.instance && item.instance._type == deviceType.Signal) {
                const deviceBoundingRect = {
                    x1: item.position.x,
                    y1: item.position.y,
                    x2: item.position.x,
                    y2: item.position.y
                };
                if (this.whetherInclude(boundingRect, deviceBoundingRect )) {
                    includeDeviceList.push(item);
                }
            }
        });
        this.deviceList = includeDeviceList;
        store.commit('map/setSeclectDeviceList', this.deviceList); // 给store设置框选的 model
    }
    // 生成包围盒对象坐标
    createFakeBoundingRect(instance) {
        return {
            x1: instance.model.point.x,
            y1: instance.model.point.y,
            x2: instance.model.point.x + instance.model.width,
            y2: instance.model.point.y + instance.model.height
        };
    }

    // 判断元素包围盒是否在选中区域
    whetherInclude(boundingRect1, boundingRect2) {
        return boundingRect1.x1 <= boundingRect2.x1 && boundingRect1.y1 <= boundingRect2.y1 && boundingRect1.x2 >= boundingRect2.x2 && boundingRect1.y2 >= boundingRect2.y2;
    }

    // 右键拖动区域大小
    handleMouseMoveRight(point2) {
        const point1 = this.rightClickPoint;
        const originX = Math.min(point1.x, point2.x);
        const originY = Math.min(point1.y, point2.y);
        const dx = originX + this.$jmap.$options.offsetX;
        const dy = originY + this.$jmap.$options.offsetY;
        const x = dx / this.$jmap.$options.scaleRate;
        const y = dy / this.$jmap.$options.scaleRate;
        const width = Math.abs(point1.x - point2.x) / this.$jmap.$options.scaleRate;
        const height = Math.abs(point1.y - point2.y) / this.$jmap.$options.scaleRate;
        this.$jmap.renderCheckBox({code: 'check_box', _type: 'CheckBox', point: {x: x, y: y}, width: width, height: height });
    }
}

export default MouseController;