export class GameObjManager {
  map;
  opts = {
    bgColor: "303030",
    bgFocusColor: "505030",
    bgHoverColor: "505050",
    bgFocusHoverColor: "707050",
    bgClickColor: "202020",
    bgFocusClickColor: "404020",
    borderColor: "000000",
    borderFocusColor: "808000",
    font: "monospace",
    fontSize: 24,
    maxFontWidth: 16,
    floorOpacity: 0.75,
    roomOpacity: 0.75,
  };

  mainmanager;

  floorObject;
  roomObjects = new Map([]);

  constructor(map, opts = {}) {
    this.map = map;
    this.opts = {
      ...this.opts,
      ...opts,
    };
  }

  generateFloor() {
    if (this.floorObject) this.floorObject.destroy();

    const currentFloor = this.mainmanager.getCurrentFocusObject("floor");

    const polygon = new this.map.kp.Polygon(
      currentFloor.poly.map(([x, y]) => this.map.kp.vec2(x, y))
    );

    this.floorObject = this.map.kp.make([
      this.map.kp.polygon(polygon.pts),
      this.map.kp.color(this.map.kp.Color.fromHex("303030")),
      this.map.kp.opacity(this.opts.floorOpacity),
      this.map.kp.pos(),
      this.map.kp.z(5),
    ]);

    const bounds = polygon.bbox();

    this.map.camBounds = bounds;

    this.floorObject.onDraw(() => {
      const camScale = 1 / this.map.kp.camScale().y;

      this.map.kp.drawPolygon({
        pts: polygon.pts,
        pos: this.map.kp.vec2(0),
        fill: false,
        outline: {
          color: this.map.kp.Color.fromHex(this.opts.borderColor),
          width: 8 * camScale,
        },
      });

      this.map.kp.drawText({
        text: currentFloor.name,
        size: 24 * camScale,
        pos: this.map.kp.vec2(-4 * camScale, -8 * camScale),
        color: this.map.kp.WHITE,
        anchor: "botleft",
      });
    });

    this.map.kp.add(this.floorObject);
  }

  zoomToBounds(boundingBox) {
    // Get screen size
    const width = this.map.kp.width();
    const height = this.map.kp.height();

    // Get bbox size
    const bBoxWidth = boundingBox.width * 2;
    const bBoxHeight = boundingBox.height * 2;

    // Compare bounds
    const scaledWidth = width / bBoxWidth;
    const scaledHeight = height / bBoxHeight;

    // Whichever one is biggest
    const scale = Math.min(scaledWidth, scaledHeight);

    this.map.zoomToAbs(
      Math.log2(scale), // log scale
      boundingBox.center()
    );
  }

  zoomToFloor() {
    const objectBounds = this.floorObject.renderArea().bbox();

    this.zoomToBounds(objectBounds);
  }

  zoomToRoom(id) {
    const selectedObject = this.roomObjects.get(id);
    if (selectedObject == null) return;

    const objectBounds = selectedObject.renderArea().bbox();

    this.zoomToBounds(objectBounds);
  }

  generateRooms() {
    if (this.roomObjects.size > 0) {
      this.roomObjects.forEach((x) => x.destroy());
      this.roomObjects.clear();
    }

    const currentRooms = this.mainmanager.getAllFocusObject("room");

    currentRooms.forEach((room) => {
      const polygon = new this.map.kp.Polygon(
        room.poly.map(([x, y]) => this.map.kp.vec2(x, y))
      );

      const obj = this.map.kp.make([
        this.map.kp.polygon(polygon.pts),
        this.map.kp.color(this.map.kp.Color.fromHex(this.opts.bgColor)),
        this.map.kp.opacity(this.opts.roomOpacity),
        this.map.kp.area(),
        this.map.kp.pos(),
        this.map.kp.z(6),
        {
          clickForgiveness: 5,
          startClickPosition: null,
        },
      ]);

      this.roomObjects.set(room.id, obj);

      obj.onUpdate(() => {
        const roomFocused = this.mainmanager.getCurrentFocus("room") == room.id;

        if (roomFocused) {
          obj.z = 7;
        } else {
          obj.z = 6;
        }

        if (obj.isHovering()) {
          if (roomFocused)
            obj.color = this.map.kp.Color.fromHex(this.opts.bgFocusHoverColor);
          else obj.color = this.map.kp.Color.fromHex(this.opts.bgHoverColor);
        } else {
          if (roomFocused)
            obj.color = this.map.kp.Color.fromHex(this.opts.bgFocusColor);
          else obj.color = this.map.kp.Color.fromHex(this.opts.bgColor);
        }

        if (this.map.kp.isMousePressed() && obj.isHovering()) {
          obj.startClickPosition = this.map.kp.mousePos();
        }

        if (this.map.kp.isMouseDown() && obj.isHovering()) {
          if (roomFocused)
            obj.color = this.map.kp.Color.fromHex(this.opts.bgFocusClickColor);
          else obj.color = this.map.kp.Color.fromHex(this.opts.bgClickColor);
        }

        if (this.map.kp.isMouseReleased() && obj.isHovering()) {
          const endClickPosition = this.map.kp.mousePos();
          if (
            obj.startClickPosition &&
            obj.startClickPosition.dist(endClickPosition) < obj.clickForgiveness
          ) {
            window.location.hash = room.id;
          }
          if (roomFocused)
            obj.color = this.map.kp.Color.fromHex(this.opts.bgFocusHoverColor);
          this.map.clearMouseMode();
        }
      });

      obj.onDraw(() => {
        const camScale = 1 / this.map.kp.camScale().y;
        const roomFocused = this.mainmanager.getCurrentFocus("room") == room.id;

        this.map.kp.drawPolygon({
          pts: polygon.pts,
          pos: this.map.kp.vec2(0),
          fill: false,
          outline: {
            color: this.map.kp.Color.fromHex(
              roomFocused ? this.opts.borderFocusColor : this.opts.borderColor
            ),
            width: 8 * camScale,
          },
        });

        if (
          this.opts.maxFontWidth * camScale * room.name.length >
          polygon.bbox().width
        )
          this.map.kp.drawText({
            text: room.shortName + "…",
            size: this.opts.fontSize * camScale,
            pos: polygon.bbox().center(),
            color: this.map.kp.WHITE,
            align: "center",
            anchor: "center",
          });
        else
          this.map.kp.drawText({
            text: room.name,
            width: polygon.bbox().width,
            size: this.opts.fontSize * camScale,
            pos: polygon.bbox().center(),
            color: this.map.kp.WHITE,
            align: "center",
            anchor: "center",
          });
      });

      this.floorObject.add(obj);
    });
  }
}