import { Rect } from "konva/lib/shapes/Rect";
import {
  globalWatch,
  installGlobalVar,
  useForciblyShowItemIds,
  useMountParts,
  useStage,
} from "./use-global-vars";
import {
  useGetFormalChildren,
  useFormalLayer,
  useHelperLayer,
} from "./use-layer";
import { themeColor } from "@/constant";
import { dragListener } from "@/utils/event";
import { Layer } from "konva/lib/Layer";
import { useOperMode } from "./use-status";
import {
  computed,
  markRaw,
  nextTick,
  reactive,
  ref,
  toRaw,
  watch,
  watchEffect,
} from "vue";
import { EntityShape } from "@/deconstruction";
import { Util } from "konva/lib/Util";
import { useViewerInvertTransform, useViewerInvertTransformConfig } from "./use-viewer";
import { debounce, diffArrayChange, mergeFuns, onlyId } from "@/utils/shared";
import { IRect } from "konva/lib/types";
import { useMouseShapesStatus } from "./use-mouse-status";
import Icon from "../components/icon/temp-icon.vue";
import { Group } from "konva/lib/Group";
import { Component as GroupComp, GroupData } from "../components/group/";
import { DrawStore, useStore } from "../store";
import { DrawItem } from "../components";
import { Stage } from "konva/lib/Stage";
import { useOnComponentBoundChange } from "./use-component";
import { useHistory } from "./use-history";
import { isRectContained } from "@/utils/math";
import { useTransformer } from "./use-transformer";

const normalSelectIds = (
  store: DrawStore,
  ids: string[],
  needChildren = false
) => {
  if (!store.typeItems.group) return ids;

  const gChildrenIds = store.typeItems.group.map((item) => item.ids);
  const findNdx = (id: string) =>
    gChildrenIds.findIndex((cIds) => cIds.includes(id));
  if (!needChildren) {
    return ids.filter((id) => !~findNdx(id));
  }

  const groupIds = store.typeItems.group.map((item) => item.id);
  const nIds: string[] = [];
  for (let i = 0; i < ids.length; i++) {
    let ndx = findNdx(ids[i]);
    ~ndx || (ndx = groupIds.indexOf(ids[i]));

    if (!~ndx) {
      nIds.push(ids[i]);
      continue;
    }

    const group = store.typeItems.group[ndx];
    const addIds = [group.id, ...group.ids].filter(
      (aid) => !nIds.includes(aid)
    );
    nIds.push(...addIds);
  }
  return nIds;
};

export const normalSelectShapes = (
  stage: Stage,
  store: DrawStore,
  shapes: EntityShape[],
  needChildren = false
) => {
  let ids: string[] = [];
  for (let i = 0; i < shapes.length; i++) {
    const shape = shapes[i];
    const id = shape.id();
    id && ids.push(id);
  }
  ids = normalSelectIds(store, ids, needChildren);
  return ids.map((id) => stage.findOne(`#${id}`)!) as EntityShape[];
};

export const normalSelectItems = (
  store: DrawStore,
  items: DrawItem[],
  needChildren = false
) => {
  return normalSelectIds(
    store,
    items.map((item) => item.id),
    needChildren
  ).map((id) => store.getItemById(id)!);
};

export const useExcludeSelection = installGlobalVar(() => ref<string[]>([]))

export const useSelection = installGlobalVar(() => {
  const layer = useHelperLayer();
  const eSelection = useExcludeSelection()
  const getChildren = useGetFormalChildren();
  const box = new Rect({
    stroke: themeColor, 
    strokeWidth: 1,
    fill: "#fff",
    listening: false,
    opacity: 0.5,
  });
  const stage = useStage();
  const operMode = useOperMode();
  const selections = ref<EntityShape[]>();
  const transformer = useTransformer();

  let shapeBoxs: IRect[] = [];
  let shapes: EntityShape[] = [];

  const updateSelections = () => {
    const boxRect = box.getClientRect();
    selections.value = [];

    for (let i = 0; i < shapeBoxs.length; i++) {
      if (
        
        Util.haveIntersection(boxRect, shapeBoxs[i]) &&
        !isRectContained(shapeBoxs[i], boxRect) &&
        shapes[i] !== toRaw(transformer)
      ) {
        if (!selections.value.includes(shapes[i])) {
          selections.value.push(shapes[i]);
        }
      }
    }
  };

  const init = (dom: HTMLDivElement, layer: Layer) => {
    const stopListener = dragListener(dom, {
      down(pos) {
        layer.add(box);
        box.x(pos.x);
        box.y(pos.y);
        box.width(0);
        box.height(0);
      },
      move({ end }) {
        box.width(end.x - box.x());
        box.height(end.y - box.y());
        updateSelections();
      },
      up() {
        selections.value = undefined;
        box.remove();
      },
    });
    return () => {
      stopListener();
      box.remove();
    };
  };

  const updateInitData = () => {
    shapes = getChildren().filter(shape => !eSelection.value.includes(shape.id()));
    shapeBoxs = shapes.map((shape) => shape.getClientRect());
  };

  const stopWatch = globalWatch(
    () => operMode.value.mulSelection,
    (mulSelection, _, onCleanup) => {
      if (!mulSelection) return;
      const dom = stage.value?.getNode().container()!;
      updateInitData();
      onCleanup(init(dom, layer.value!));
    }
  );

  return {
    onDestroy: stopWatch,
    var: {selections, box},
  };
});

export const useSelectionShowIcons = installGlobalVar(() => {
  const mParts = useMountParts();
  const { on } = useOnComponentBoundChange();
  const iconProps = {
    width: 12,
    height: 12,
    url: "./icons/state_s.svg",
    fill: themeColor,
    stroke: "#fff",
    listening: false,
  };
  const invConfig = useViewerInvertTransformConfig()
  const status = useMouseShapesStatus();
  const getChildren = useGetFormalChildren()

  const store = useStore();
  const invMat = useViewerInvertTransform();
  const getShapeMat = (shape: EntityShape) => {
    const rect = shape.getClientRect();
    const center = invMat.value.point({
      x: rect.x + rect.width / 2,
      y: rect.y + rect.height / 2,
    });
    return [1, 0, 0, 1, center.x, center.y];
  };
  const shapes = computed(() => {
    const child = getChildren()
    return status.selects.filter((shape) => store.getType(shape.id()) !== "group" && child.includes(shape))
  });
  const unMountMap = new WeakMap<EntityShape, () => void>();
  watch(shapes, (shapes, oldShapes) => {
    const { added, deleted } = diffArrayChange(shapes, oldShapes);
    for (const addShape of added) {
      const mat = ref(getShapeMat(addShape));
      const data = reactive({ ...iconProps, mat: mat })
      const unHooks = [
        on(addShape, () => (mat.value = getShapeMat(addShape))),
        watch(invConfig, () => {
          data.width = invConfig.value.scaleX * iconProps.width
          data.height = invConfig.value.scaleY * iconProps.height
        }, {immediate: true}),
        mParts.add({
          comp: markRaw(Icon),
          props: { data },
        }),
      ];
      unMountMap.set(addShape, mergeFuns(unHooks));
    }
    for (const delShape of deleted) {
      const fn = unMountMap.get(delShape);
      fn && fn();
    }
  });
});

const useWatchSelection = () => {
  const status = useMouseShapesStatus();
  const addShapes = (allShapes: Set<EntityShape>, iShapes: EntityShape[]) => {
    iShapes.forEach((shape) => allShapes.add(toRaw(shape)));
    return allShapes;
  };
  const delShapes = (allShapes: Set<EntityShape>, dShapes: EntityShape[]) => {
    dShapes.forEach((item) => allShapes.delete(toRaw(item)));
    return allShapes;
  };

  // 分组管理
  const watchSelection = () =>
    watch(
      () => status.selects,
      (shapes) => {
        const fShapes = Array.from(new Set(shapes));
        const { added, deleted } = diffArrayChange(shapes, fShapes);
        if (added.length || deleted.length) {
          status.selects = fShapes;
        }
      },
      { flush: "post" }
    );

  return {
    addShapes,
    delShapes,
    watchSelection,
  };
};

const useWatchSelectionGroup = () => {
  const stage = useStage();
  const store = useStore();
  const status = useMouseShapesStatus();
  const addShapes = (allShapes: Set<EntityShape>, iShapes: EntityShape[]) => {
    const shapes = normalSelectShapes(
      stage.value!.getNode(),
      store,
      iShapes,
      true
    );
    shapes.forEach((shape) => allShapes.add(shape));
    return allShapes;
  };
  const delShapes = (allShapes: Set<EntityShape>, dShapes: EntityShape[]) => {
    const shapes = normalSelectShapes(
      stage.value!.getNode(),
      store,
      dShapes,
      true
    );
    shapes.forEach((item) => allShapes.delete(item));
    return allShapes;
  };

  // 分组管理
  const watchSelection = () =>
    watch(
      () => status.selects,
      (shapes, oldShapes) => {
        const { added, deleted } = diffArrayChange(shapes, oldShapes);
        const filterShapes = new Set(shapes);
        added.length && addShapes(filterShapes, added);
        deleted.length && delShapes(filterShapes, deleted);

        if (added.length || deleted.length) {
          status.selects = Array.from(filterShapes);
        }
      },
      { flush: "post" }
    );

  return {
    addShapes,
    delShapes,
    watchSelection,
  };
};

export const useSelectionRevise = () => {
  const mParts = useMountParts();
  const status = useMouseShapesStatus();
  const store = useStore();
  const eSelection = useExcludeSelection()

  const { addShapes, delShapes, watchSelection } = useWatchSelection();

  useSelectionShowIcons();

  const getFormatChildren = useGetFormalChildren();
  const filterSelect = debounce(() => {
    const children = getFormatChildren();
    const mouseSelects = status.selects.filter((shape) =>
      !eSelection.value.includes(shape.id()) && children.includes(shape)
    );
    status.selects = mouseSelects;
  }, 16);
  store.bus.on("delItemAfter", filterSelect);
  store.bus.on("clearAfter", filterSelect);
  store.bus.on("dataChangeAfter", filterSelect);
  store.bus.on("setCurrentLayerAfter", filterSelect);

  const { selections: rectSelects } = useSelection();
  let initSelections: EntityShape[] = [];
  let stopWatchSelection = watchSelection();
  watch(
    () => rectSelects.value && [...rectSelects.value],
    (rectSelects, oldRectSelects) => {
      if (!oldRectSelects) {
        initSelections = [...status.selects];
        stopWatchSelection();
      } else if (!rectSelects) {
        initSelections = [];
        stopWatchSelection = watchSelection();
      } else {
        status.selects = Array.from(
          addShapes(new Set(initSelections), rectSelects)
        );
        // filterSelect()
      }
    }
  );

  const ids = computed(() => [...new Set(status.selects.map((item) => item.id()))]);
  const groupConfig = {
    id: onlyId(),
    createTime: Date.now(),
    lock: false,
    opacity: 1,
    ref: false,
    listening: false,
    stroke: themeColor,
  };
  const operMode = useOperMode();
  const layer = useFormalLayer();
  watch(
    () => [!!ids.value.length, operMode.value.mulSelection],
    (_a, _b) => {
      const groupShape = layer.value?.findOne<Group>(`#${groupConfig.id}`);
      if (!groupShape) return;
      if (ids.value.length && !operMode.value.mulSelection) {
        status.actives = [groupShape];
      } else if (status.actives.includes(groupShape)) {
        status.actives = [];
      }
    }
  );

  const stage = useStage();
  const history = useHistory();
  const showItemId = useForciblyShowItemIds();
  watchEffect((onCleanup) => {
    if (!ids.value.length) return;
    const props = {
      data: { ...groupConfig, ids: ids.value },
      key: groupConfig.id,
      onUpdateShape(data: GroupData) {
        status.selects;
        data.ids;
      },
      onDelShape() {
        status.selects = [];
      },
      onAddShape(data: GroupData) {
        history.onceTrack(() => {
          const ids = data.ids;
          const cIds = ids.filter((id) => store.getType(id) !== "group");

          const groups = store.typeItems.group;
          const exists = groups?.some((group) => {
            if (group.ids.length !== cIds.length) return false;
            const diff = diffArrayChange(group.ids, cIds);
            return diff.added.length === 0 && diff.deleted.length == 0;
          });
          if (exists) return;

          let selects = new Set(status.selects);
          for (let i = 0; i < ids.length; i++) {
            if (store.getType(ids[i]) === "group") {
              delShapes(
                selects,
                status.selects.filter((shape) => shape.id() === ids[i])
              );
              store.delItem("group", ids[i]);
            }
          }

          store.addItem("group", { ...data, ids: cIds });
          showItemId.cycle(data.id, async () => {
            await nextTick();
            const $stage = stage.value!.getNode();
            const addShape = $stage.findOne("#" + data.id) as EntityShape;
            addShapes(selects, [addShape]);
            status.selects = Array.from(selects);
          });
        });
      },
    };
    onCleanup(mParts.add({ comp: markRaw(GroupComp), props }));
  });
};