import VectorType from "../enum/VectorType.js";
import SelectState from "../enum/SelectState.js";
import VectorCategory from "../enum/VectorCategory.js";
import { dataService } from "./DataService.js";

export default class StateService {
  constructor() {
    this.eventName = null;
    this.selectItem = null; //选中
    this.focusItem = null; //点击
    this.draggingItem = null; //拖拽
  }

  getEventName() {
    return this.eventName;
  }

  setEventName(eventName) {
    this.eventName = eventName;
  }

  clearEventName() {
    this.eventName = null;
  }

  // type表示类型，state默认是select，但是有的元素需要知道选中的是哪个顶点
  setSelectItem(vectorId, type, state, dir) {
    this.selectItem = {};
    this.selectItem.vectorId = vectorId;
    this.selectItem.type = type;
    this.selectItem.state = state;
    this.selectItem.dir = dir;

    if (type == VectorType.Line) {
      const line = dataService.getLine(vectorId);
      this.selectItem.category = line.getCategory();
    } else if (type == VectorType.Point) {
      const point = dataService.getPoint(vectorId);
      this.selectItem.category = point.getCategory();
    }
    // console.log("选中的元素：" + JSON.stringify(this.selectItem));
  }
  setSelectState(state) {
    if (!state || !this.selectItem) {
      return;
    }

    this.selectItem.state = state;
  }
  getSelectItem() {
    return this.selectItem;
  }

  clearSelectItem() {
    this.selectItem = null;
  }

  getDraggingItem() {
    return this.draggingItem;
  }

  setDraggingItem(draggingItem) {
    this.draggingItem = draggingItem;
    if (this.draggingItem == null) {
      return;
    } else if (this.draggingItem.type == VectorType.Line) {
      const line = dataService.getLine(this.draggingItem.vectorId);
      if (!line) {
        return;
      }
      this.draggingItem.category = line.getCategory();
    } else if (this.draggingItem.type == VectorType.Point) {
      const point = dataService.getPoint(this.draggingItem.vectorId);
      this.draggingItem.category = point.getCategory();
    }
  }

  clearDraggingItem() {
    this.draggingItem = null;
  }

  getFocusItem() {
    return this.focusItem;
  }

  setFocusItem(focusItem) {
    this.focusItem = {};
    for (let key in focusItem) {
      this.focusItem[key] = focusItem[key];
    }
  }

  clearFocusItem() {
    this.focusItem = null;
  }

  clearItems() {
    this.selectItem = null;
    this.focusItem = null;
    this.draggingItem = null;
  }

  clear() {
    this.clearItems();
    this.clearEventName();
  }
}

const stateService = new StateService();
window.stateService = stateService;
export { stateService };