import { ModuleControl } from "queenjs";
import { reactive } from "vue";
import { EditorModule } from "../../module";
import { DesignComp } from "../../objects/DesignTemp/DesignComp";
import { Matrix } from "./matrix";
import { GroupActionCtrl } from "../TransferCtrl/GroupCtrl";
import { Point } from "./objects/point";
import { ObjsContainer } from "./ObjsContainer";
import Event from "./event";
import { DisplayObject } from "./objects/displayObject";
import { CompObject } from "./compObj";
import { each, eachRight } from "lodash";
import { string } from "vue-types";
import { Project, VectorLenth } from "./objects/mathUtils";

/**
 *  页面画布空间进行选择
 */
const MODE_SEL_RECT = 1;
const MODE_MOVING = 2;
const MODE_ROTATE = 3;
const MODE_SCALE = 4;

const MODE_NONE = 0;

export class SelectCtrl extends ModuleControl<EditorModule> {
  transEvent = {
    startX: 0,
    startY: 0,
    offsetX: 0,
    offsetY: 0,
    width: 0,
    height: 0,
  };

  transferStyle = reactive({
    showGizmo: false,
    width: 0,
    height: 0,
    matrix: "matrix(1,0,0,1,0,0)",
    matrixInvert: "matrix(1,0,0,1,0,0)",
  });

  selected: any[] = []; //选中的所有组件ids
  mouseDownSelects: any[] = []; //鼠标按下时选中的

  pageEl?: HTMLElement;
  selCanvas = {} as HTMLCanvasElement;

  _downed = false;
  _selCtx = {} as CanvasRenderingContext2D;
  _state = MODE_SEL_RECT;

  _selDownX = 0;
  _selDownY = 0;
  _selBox = {} as DOMRect;
  _selCanvaseSize = { w: 0, h: 0 };
  _downClientX = 0;
  _downClientY = 0;
  //groupCtrl = new GroupActionCtrl(this.module);
  bus = new Event();
  viewport?:HTMLElement;

  initEvents(pageEl: HTMLElement, selCanvas: HTMLCanvasElement, viewport:HTMLElement) {
    this.viewport = viewport;
    this.pageEl = pageEl;
    this.selCanvas = selCanvas;
    const b = selCanvas.getBoundingClientRect();
    selCanvas.width = b.width * 2;
    selCanvas.height = b.height * 2;

    this._selCtx = selCanvas.getContext("2d") as CanvasRenderingContext2D;

    this._selCanvaseSize.w = selCanvas.width * 2;
    this._selCanvaseSize.h = selCanvas.height * 2;

    document.addEventListener("mousedown", this.onDocMouseDown.bind(this));
    document.addEventListener("mousemove", this.onDocMouseMove.bind(this));
    document.addEventListener("mouseup", this.onDocMouseUp.bind(this));

    window.addEventListener("resize", this.onResize.bind(this));
  }

  _mouseDownFlag = "";
  onDocMouseDown(e: MouseEvent) {
    if (!this.pageEl || !this.selCanvas) return;

    let box = this.pageEl.getBoundingClientRect();
    const pageX = e.clientX - box?.left;
    const pageY = e.clientY - box?.top;

    const card = this.store.currStreamCard.$el;
    box = card.getBoundingClientRect();
    const cardX = pageX;
    const cardY = e.clientY - box.top;

    const sel = this.selCanvas.getBoundingClientRect();
    const selX = e.clientX - sel.left;
    const sely = e.clientY - sel.top;
    this._selDownX = selX;
    this._selDownY = sely;
    this._selBox = sel;

    this._downClientX = e.clientX;
    this._downClientY = e.clientY;

    console.log(cardX, selX, cardY, sely);

    this._downed = true;
    this._mouseDownFlag = this.getDivFlag(e.target as any);
    if (!this._mouseDownFlag) {
      //选框点击判断
      let isClickSelRect = false;
      if (this.selected.length > 0) {
        isClickSelRect = this.objContainer?.testClick(cardX, cardY) as boolean;
        if (isClickSelRect) {
          this._state = MODE_MOVING;
        }
      }

      if (!isClickSelRect) {
        //判断是否有点击到card stream
        const comps = this.compClickTest(e);
        this.mouseDownSelects = comps;
        console.log("comps=>", comps);
        if (comps.length < 1) {
            const view =  this.viewport?.getBoundingClientRect() as any;
            const isOut = (e.clientX < view.left || e.clientX > (view.right) || e.clientY < view.top || e.clientY > view.bottom)
            if (!isOut) {
                this._state = MODE_SEL_RECT;
            }
        } else {
          this._state = MODE_MOVING;
          const obj = this.compMap[comps[0].id];
          this.selecteObjs([new CompObject(obj)]);
        }
      }
    } else if (this._mouseDownFlag == "rotate") {
      this._state = MODE_ROTATE;
    } else if (this._mouseDownFlag == "move") {
      this._state = MODE_MOVING;
    } else if (this._mouseDownFlag.indexOf("scale") > -1) {
      this._state = MODE_SCALE;
    }

    this._movePreClientX = this._downClientX;
    this._movePreClientY = this._downClientY;
  }

  getDivFlag(div: HTMLElement) {
    let c: any = div;
    if (!c) return;
    let i = 0;
    do {
      if (c.editable) return c.editable;
      c = div.parentElement;
      i += 1;
      if (i > 3) {
        return;
      }
    } while (c);
  }

  compClickTest(e: MouseEvent) {
    const cards = this.store.streamCardIds;
    let n = cards.length;
    const compMap = this.store.designData.compMap;
    //@ts-ignore
    const pbox = this.pageEl.getBoundingClientRect();
    const pageX = e.clientX - pbox?.left;

    const Out = [];
    while (n--) {
      const cardComp = compMap[cards[n]];
      const box = cardComp.$el.getBoundingClientRect();
      const cardY = e.clientY - box.top;

      const cardChilds = cardComp.children.default || [];
      for (const key of cardChilds) {
        const c = compMap[key];
        const m = Matrix.createFromDiv(c.$el);
        const localp = m.applyInverse(new Point(pageX, cardY));
        const cw = this.helper.designSizeToPx(c.layout.size?.[0] as number);
        const ch = this.helper.designSizeToPx(c.layout.size?.[1] as number);
        const out =
          localp.x < 0 || localp.x > cw || localp.y < 0 || localp.y > ch;
        if (!out) {
          Out.push({
            id: key,
            el: c.$el,
            cardX: pageX,
            cardY: cardY,
            cardId: cards[n],
            startMatrix: m,
          });
        }
      }
    }
    return Out;
  }

  streamCardClickTest(e: MouseEvent) {
    const cards = this.store.streamCardIds;
    let n = cards.length;
    const compMap = this.store.designData.compMap;
    //@ts-ignore
    const pbox = this.pageEl.getBoundingClientRect();
    const pageX = e.clientX - pbox?.left;
    if (pageX < 0 || pageX > pbox.width) return "";
    while (n--) {
      const card = compMap[cards[n]];
      const box = card.$el.getBoundingClientRect();
      if (e.clientY >= box.top && e.clientY <= box.bottom)
        return { id: cards[n], x: pageX, y: e.clientY - box.top };
    }
    return "";
  }

  _moveSelectUpdated = false;

  updateSelects() {
    if (this._moveSelectUpdated) return;
    this._moveSelectUpdated = true;

    //鼠标按下并移动中 修正当前选中的对象
    if (this.selected.length < 1) {
      //没有被选中的
      this.selected = this.mouseDownSelects;
    } else {
      //当前有选中的
      let findSeleted = false;
      let n = this.selected.length;
      if (this.mouseDownSelects.length > 0) {
        while (n--) {
          const item = this.mouseDownSelects.find(
            (item) => item.id == this.selected[n].id
          );
          if (item) findSeleted = true;
        }
      }
      if (!findSeleted) {
        this.selected = this.mouseDownSelects;
      }
    }
    if (this.selected.length > 0) {
      this._state = MODE_MOVING;
    }
  }

  translate(xOffset:number, yOffset:number) {
    const objContainer = this.objContainer as ObjsContainer;
    objContainer.translate(xOffset, yOffset);
    this.upgateGizmoStyle();
  }

  movingMousemove(e: MouseEvent) {
    const objContainer = this.objContainer as ObjsContainer;

    objContainer.translate(
      e.clientX - this._movePreClientX,
      e.clientY - this._movePreClientY
    );

    this.upgateGizmoStyle();
  }

  _movePreClientX = 0;
  _movePreClientY = 0;

  onDocMouseMove(e: MouseEvent) {
    if (!this.pageEl) return;

    if (!this._downed) {
      this.checkHover();
      return;
    }

    switch (this._state) {
      case MODE_SEL_RECT: //选框模式
        this.drawSelRect(e);
        break;
      case MODE_MOVING:
        this.movingMousemove(e);
        break;
      case MODE_ROTATE:
        this.rotateMousemove(e);
        break;
      case MODE_SCALE:
        this.scaleMousemove(e);
    }

    this._movePreClientY = e.clientY;
    this._movePreClientX = e.clientX;
  }

  get compMap() {
    return this.store.designData.compMap;
  }

  onDocMouseUp(e: MouseEvent) {
    let isClick = false;
    const dx = Math.abs(e.clientX - this._downClientX);
    const dy = Math.abs(e.clientY - this._downClientY);
    if (dx < 2 && dy < 2) {
      isClick = true;
    }
    if (isClick) {
      this._state = MODE_NONE;
      if (this.mouseDownSelects.length < 1) this.selecteObjs([]);
      else {
        const objs = this.mouseDownSelects.map(
          (item) => new CompObject(this.compMap[item.id])
        );
        this.selecteObjs(objs);
      }
    }

    console.log("up");

    if (this._state == MODE_SEL_RECT && !isClick) {
      //选择空间转 streamCard空间
      const card = this.store.currStreamCard;
      const box = card.$el.getBoundingClientRect();
      this.rectSelect(
        this._lastSelRect[0] - box.left,
        this._lastSelRect[1] - box.top,
        this._lastSelRect[2],
        this._lastSelRect[3]
      );
    }

    if (this._state == MODE_ROTATE) {
      this.rotateMouseUp(e);
    }
    if (this._state == MODE_SCALE) {
      this.scaleMouseUp(e);
    }
    this._state = MODE_NONE;
    this._downed = false;
    this._moveSelectUpdated = false;
    this._selCtx?.clearRect(
      0,
      0,
      this._selCanvaseSize.w,
      this._selCanvaseSize.h
    );

    this.upgateGizmoStyle();
  }

  rectSelect(x: number, y: number, width: number, height: number) {
    const childs =
      this.compMap[this.store.currStreamCardId].children.default || [];
    let n = childs.length;
    const outs = [];
    while (n--) {
      const o = new CompObject(this.compMap[childs[n]]);
      if (o.testRect({ x, y, w: width, h: height }, true)) {
        //相交
        outs.push(o);
      }
    }
    console.log(outs);

    this.selecteObjs(outs);
  }

  upgateGizmoStyle() {
    if (this.selected.length < 1) {
      this.transferStyle.showGizmo = false;
      return;
    }

    this.transferStyle.showGizmo = false;

    const selector = this.objContainer as ObjsContainer;
    if (!selector) {
      return;
    }
    this.transferStyle.showGizmo = true;

    let obj = selector.parent;
    let w = selector.rect.width,
      h = selector.rect.height;

    let tmp = new Matrix();
    tmp.copyFrom(obj.worldTransform);
    // tmp.scale(0.5 , 0.5);

    let matrix = `matrix(${tmp.a},${tmp.b},${tmp.c},${tmp.d},${tmp.tx},${tmp.ty})`;
    tmp.invert();
    let matrixInvert = `matrix(${tmp.a},${tmp.b},${tmp.c},${tmp.d},0,0)`;

    this.transferStyle.width = w;
    this.transferStyle.height = h;
    this.transferStyle.matrix = matrix;
    this.transferStyle.matrixInvert = matrixInvert;
  }

  selectId(id: string) {
    //选中ids之前 id对应组件必须已经渲染
    console.log("selectId=>", id);
  }

  _lastSelRect = [0, 0, 0, 0];

  drawSelRect(e: MouseEvent) {
    const ctx = this._selCtx;

    const dx = this._selDownX;
    const dy = this._selDownY;
    const currX = e.clientX - this._selBox.left;
    const currY = e.clientY - this._selBox.top;
    const x = Math.min(currX, dx),
      y = Math.min(dy, currY);
    ctx.clearRect(0, 0, this._selCanvaseSize.w, this._selCanvaseSize.h);

    ctx.fillStyle = "rgba(232, 139, 0, 0.16)";
    const w = Math.abs(currX - dx);
    const h = Math.abs(currY - dy);
    ctx.fillRect(x * 2, y * 2, w * 2, h * 2);

    ctx.lineWidth = 2;
    ctx.strokeStyle = "#E88B00";
    ctx.strokeRect(x * 2, y * 2, w * 2, h * 2);

    this._lastSelRect[0] = x + this._selBox.left;
    this._lastSelRect[1] = y + this._selBox.top;
    this._lastSelRect[2] = w;
    this._lastSelRect[3] = h;
  }

  checkHover() {
    this.selCanvas;
  }

  onResize() {
    const b = this.selCanvas.getBoundingClientRect();
    this.selCanvas.width = b.width * 2;
    this.selCanvas.height = b.height * 2;
    this._selCtx = this.selCanvas.getContext("2d") as CanvasRenderingContext2D;
    this._selCanvaseSize.w = b.width * 2;
    this._selCanvaseSize.h = b.height * 2;
  }
  //
  checkIntersect(compId: string, e: MouseEvent) {
    const currCard = this.store.currStreamCard.$el;

    const comp = this.store.designData.compMap[compId];

    //排除坐标没有在streamCard空间内的坐标

    //把当前的card坐标转为 组件的自己local坐标判断是否在方框外面
    const cardBox = currCard.getBoundingClientRect();
    const cardX = e.clientX - cardBox.left;
    const cardY = e.clientY - cardBox.top;

    //const m = Matrix.createFromComp(comp.layout.transform)
  }
  objContainer?: ObjsContainer;

  selecteObjs(objs: any[], ContainerBox?: ObjsContainer) {
    if (this.selected.length == 0 && objs.length == 0) return;
    if (
      this.selected.length == 1 &&
      objs.length == 1 &&
      this.selected[0] == objs[0]
    )
      return;

    if (objs.length == 1) {
        this.actions.pickComp(objs[0].comp.id);
    }

    // objs = this.getSceneObjOrderArr(objs);

    const preObjContainer = this.objContainer;

    if (this.objContainer) {
      this.objContainer.destroy();
      this.objContainer = undefined;
    }

    let newObjContainer = undefined;

    if (objs.length > 0 && objs[0]) {
      newObjContainer = ContainerBox ? ContainerBox : new ObjsContainer(objs);
      if (ContainerBox) {
        objs.forEach((obj) => {
          ContainerBox.parent.addChildWorldNoChange(obj);
        });
        ContainerBox.selected = objs;
        ContainerBox.parent.updateTransform();
      }
    }
    this.objContainer = newObjContainer;

    const pre = this.selected.slice(0);
    this.selected = objs;

    // if (history) {
    //     this.editor.history.record({
    //         undo: () => {

    //             this.selected = pre;

    //             if (preObjContainer) {
    //                 let parent = preObjContainer.parent;
    //                 pre.forEach(obj => {
    //                     parent.addChildWorldNoChange(obj);
    //                 });
    //                 parent.updateTransform();
    //                 this.objContainer = preObjContainer;
    //             } else {
    //                 this.objContainer = null;
    //             }

    //             this.emitChange();

    //         }, redo: () => {
    //             this.selected = objs;

    //             if (preObjContainer) {
    //                 preObjContainer.destroy();
    //             }

    //             if (newObjContainer) {
    //                 let parent = newObjContainer.parent;
    //                 objs.forEach(obj => {
    //                     parent.addChildWorldNoChange(obj);
    //                 });
    //                 parent.updateTransform();
    //                 this.objContainer = newObjContainer;
    //             } else {
    //                 this.objContainer = null;
    //             }
    //             this.emitChange();
    //         }
    //     })
    // }
    this.emitChange();
    this.upgateGizmoStyle();

    return this.selected;
  }

  emitChange() {
    const selected = this.selected;
    if (selected.length && selected[0]) {
      this.bus.emit("showProps", selected[0].from);
    } else {
      this.bus.emit("showProps");
    }
    this.bus.emit("selectedChange");
  }

  rotateCenter?: { x: number; y: number };
  ratatePre = 0;
  objinitAngleRad = 0;
  rotateCmd = false;
  lastRad = 0;

  rotateMousemove(e: MouseEvent) {
    const card = this.store.currStreamCard;

    const rect = card.$el.getBoundingClientRect();
    let StartX = e.clientX - rect.left;
    let StartY = e.clientY - rect.top;

    const objContainer = this.objContainer as ObjsContainer;

    //获取当前屏幕坐标和选框中心点坐标，计算旋转值
    if (!this.rotateCenter) {
      //let rect = this.objContainer.parent.getBounds(false);
      let center = objContainer.setPivot(4);

      this.rotateCenter = center;

      let vec = { x: StartX - center.x, y: StartY - center.y };

      let angle = Math.atan2(vec.y, vec.x);
      if (angle < 0) angle += 2 * Math.PI;
      this.ratatePre = angle;

      this.objinitAngleRad = objContainer.parent.rotation;

      this.rotateCmd = true;
      return;
    }

    let center = this.rotateCenter;
    let vec = { x: StartX - center.x, y: StartY - center.y };
    let angle = Math.atan2(vec.y, vec.x);
    if (angle < 0) angle += 2 * Math.PI;

    let dta = this.objinitAngleRad + angle - this.ratatePre;
    if (e.shiftKey) {
      //规整到0 90 180 270
      if (dta < 0) dta += 2 * Math.PI;
      let Deg45 = Math.PI / 4.0;
      let Deg90 = Math.PI / 2.0;
      let Deg135 = Deg45 * 3;
      let Deg225 = Deg45 * 5;
      let Deg270 = Deg45 * 6;
      let Deg315 = Deg45 * 7;
      if (dta < Deg45) {
        dta = 0;
      } else if (dta < Deg135) {
        dta = Deg90;
      } else if (dta < Deg225) {
        dta = Math.PI;
      } else if (dta < Deg315) {
        dta = Deg270;
      } else {
        dta = 0;
      }
    }
    this.lastRad = dta;
    console.log("rotate=>", dta);

    objContainer.rotate(dta);

    //   this.emit("translateChange", this.objContainer)
    this.upgateGizmoStyle();
  }

  rotateMouseUp(e: MouseEvent) {
    this.rotateCenter = undefined;
    if (!this.rotateCmd) return;
    let scope = this;
    let last = this.lastRad;
    let initrad = scope.objinitAngleRad;

    // this.editor.history.record({undo:function(){
    //         scope.objContainer.setPivot(4);
    //         scope.objContainer.rotate( initrad );
    //         scope.emitChange();
    //     }, redo:function(){
    //         scope.objContainer.setPivot(4);
    //         scope.objContainer.rotate( last );
    //         scope.emitChange();
    // }});
    this.rotateCmd = false;
  }

  //缩放选中的对象
  scalePivot?: any;
  scaleIndex = 0;
  mainAxisVector = { x: 0, y: 0 };
  initScale = { x: 1, y: 1 };
  mainAxisVectorLenth = 0;
  xAxisVector = { x: 1, y: 1 };
  xAxisVectorLength = 0;
  yAxisVector = { x: 1, y: 1 };
  yAxisVectorLength = 0;
  scaleCmd = false;
  lastScale = { x: 1, y: 1 };

  scaleMousemove(event: MouseEvent) {
    let dirIndexs = [
      "scaleBottomright",
      "scaleBottomleft",
      "scaleTopleft",
      "scaleTopright",
    ];
    let dirOrth = ["scaleright", "scaleleft", "scalebottom", "scaletop"];

    const rect = this.store.currStreamCard.$el.getBoundingClientRect();
    let StartX = event.clientX - rect.left;
    let StartY = event.clientY - rect.top;
    const objContainer = this.objContainer as ObjsContainer;

    //获取当前屏幕坐标和选框中心点坐标，计算旋转值
    if (!this.scalePivot) {
      let dir = this._mouseDownFlag;
      let scaleIndex = dirIndexs.indexOf(dir);
      if (scaleIndex == -1) {
        scaleIndex = dirOrth.indexOf(dir);
        if (scaleIndex == 2) scaleIndex = 0;
      }
      let pivot = objContainer.setPivot(scaleIndex);

      this.scaleIndex = scaleIndex;
      this.scalePivot = pivot;

      this.mainAxisVector = { x: StartX - pivot.x, y: StartY - pivot.y };
      let scale = objContainer.parent.scale;
      this.initScale = { x: scale.x, y: scale.y };
      this.mainAxisVectorLenth = VectorLenth(
        this.mainAxisVector.x,
        this.mainAxisVector.y
      );

      let ret = objContainer.getPivotXY(scaleIndex);

      this.xAxisVector = ret.x;
      this.xAxisVectorLength = VectorLenth(ret.x.x, ret.x.y);
      this.yAxisVector = ret.y;
      this.yAxisVectorLength = VectorLenth(ret.y.x, ret.y.y);
      return;
    }

    this.scaleCmd = true;

    let center = this.scalePivot;
    let vec = { x: StartX - center.x, y: StartY - center.y };

    if (event.shiftKey) {
      //按住shift 自由缩放
      let dtaX = Project(vec, this.xAxisVector) / this.xAxisVectorLength;
      let dtaY = Project(vec, this.yAxisVector) / this.yAxisVectorLength;
      this.lastScale.x = dtaX * this.initScale.x;
      this.lastScale.y = dtaY * this.initScale.y;
      objContainer.scale(this.lastScale.x, this.lastScale.y);
    } else {
      let mainVec = this.mainAxisVector;
      let dtaScale = Project(vec, mainVec) / this.mainAxisVectorLenth;

      let i = dirOrth.indexOf(this._mouseDownFlag);
      if (i == -1) {
        this.lastScale.x = dtaScale * this.initScale.x;
        this.lastScale.y = dtaScale * this.initScale.y;
        objContainer.scale(this.lastScale.x, this.lastScale.y);
      } else if (i == 0 || i == 1) {
        this.lastScale.x = dtaScale * this.initScale.x;
        objContainer.scaleX(this.lastScale.x);
      } else if (i == 2 || i == 3) {
        this.lastScale.y = dtaScale * this.initScale.y;
        objContainer.scaleY(this.lastScale.y);
      }
    }
    this.upgateGizmoStyle();
  }

  scaleMouseUp(event: MouseEvent) {
    this.scalePivot = undefined;
    if (this.scaleCmd) {
      let preScale = { x: this.initScale.x, y: this.initScale.y };
      let scaleIndex = this.scaleIndex;
      let lastScale = { x: this.lastScale.x, y: this.lastScale.y };

      // this.editor.history.record({
      //     undo:()=>{
      //         this.objContainer.setPivot( scaleIndex );
      //         this.objContainer.scale(preScale.x, preScale.y);

      //         this.emitChange();
      //     },
      //     redo:()=>{
      //         this.objContainer.setPivot( scaleIndex );
      //         this.objContainer.scale(lastScale.x, lastScale.y);

      //         this.emitChange();
      //     }
      // });
      this.scaleCmd = false;

      // this.emit("objSizeChanged");
      // this.editor.draw();
    }
    // this.emitTransformed  = false;
  }
}