import {
  installGlobalVar,
  useCursor,
  useInstanceProps,
  useLayers,
  useMountMenusAttachs,
  useStage,
  useTempStatus,
} from "./use-global-vars.ts";
import { useMode, useOperMode } from "./use-status";
import { Stage } from "konva/lib/Stage";
import { useInteractiveProps } from "./use-interactive.ts";
import { useStore } from "../store/index.ts";
import { useGetViewBoxPositionPixel, useSetViewport, useViewer } from "./use-viewer.ts";
import { useGlobalResize, useListener } from "./use-event.ts";
import { useInteractiveDrawShapeAPI } from "./use-draw.ts";
import { useHistory } from "./use-history.ts";
import { watchEffect } from "vue";
import { usePaste } from "./use-paste.ts";
import { useMouseShapesStatus } from "./use-mouse-status.ts";
import { Mode } from "@/constant/mode.ts";
import { ElMessageBox } from "element-plus";
import { mergeFuns } from "@/utils/shared.ts";
import { themeColor } from "@/constant";
import { getImage, isSvgString } from "@/utils/resource.ts";
import { useResourceHandler } from "./use-fetch.ts";
import { useConfig } from "./use-config.ts";
import { useSelectionRevise } from "./use-selection.ts";
import { useFormalLayer, useGetFormalChildren } from "./use-layer.ts";
import { components } from "../components/index.ts";
import { useProportion } from "./use-proportion.ts";
import { ShapeType } from "@/index.ts";
import { useGetDXF } from "./use-dxf.ts";

// 自动粘贴服务
export const useAutoPaste = () => {
  const paste = usePaste();
  const drawAPI = useInteractiveDrawShapeAPI();
  const resourceHandler = useResourceHandler();
  paste.push({
    ["text/plain"]: {
      async handler(pos, val) {
        console.log(val);
        if (isSvgString(val)) {
          const url = await resourceHandler(val, "svg");
          drawAPI.addShape("icon", { url, stroke: themeColor }, pos, true);
        } else {
          drawAPI.addShape("text", { content: val }, pos, true);
        }
      },
      type: "string",
    },
    ["image"]: {
      async handler(pos, val, type) {
        const url = await resourceHandler(val, type);
        if (type.includes("svg")) {
          drawAPI.addShape("icon", { url, stroke: themeColor }, pos, true);
        } else {
          const image = await getImage(url);
          drawAPI.addShape(
            "image",
            { url, width: image.width, height: image.height },
            pos,
            true
          );
        }
      },
      type: "file",
    },
  });
};

// 快捷键服务
export const useShortcutKey = () => {
  // 自动退出添加模式
  const { quitDrawShape, enterDrawShape } = useInteractiveDrawShapeAPI();
  const interactiveProps = useInteractiveProps();
  const store = useStore();
  useListener(
    "contextmenu",
    (ev) => {
      const iProps = interactiveProps.value;
      if (!iProps?.type || ev.button !== 2) return;

      const addCount = quitDrawShape();
      // 钢笔工具需要右键两次才退出，右键一次相当于完成
      const isDots = ['dots', 'single-dots'].includes(components[iProps.type].addMode);
      if (isDots && addCount > 0) {
        setTimeout(() => {
          enterDrawShape(iProps.type, iProps.preset, iProps.operate?.single);
        }, 10);
      }
    },
    document.documentElement
  );

  const history = useHistory();
  const status = useMouseShapesStatus();
  const getChildren = useGetFormalChildren();
  const operMode = useOperMode();
  useListener(
    "keydown",
    (ev) => {
      if (ev.target !== document.body) return;
      
      if (ev.key === "z" && ev.ctrlKey) {
        history.hasUndo.value && history.undo();
      } else if (ev.key === "y" && ev.ctrlKey) {
        history.hasRedo.value && history.redo();
      } else if (ev.key === "s" && ev.ctrlKey) {
        // 保存
        // history.saveLocal();
      } else if (ev.key === "Delete" || ev.key === "Backspace") {
        // 删除
        
        const isSelect = status.selects.length;
        const shapes = isSelect ? status.selects : status.actives;
        const delItems = shapes.map((shape) => {
          const id = shape.id();
          if (!id) return;
          const item = store.getItemById(id)
          const type = store.getType(id);
          if (!item?.disableDelete && type) {
            return [type, item] as const
          }
        }).filter(item => !!item);
        history.onceTrack(() => {

          delItems.forEach(([type, item]) => {
            if (components[type as ShapeType].delItem) {
              components[type as ShapeType].delItem!(store, item as any)
            } else {
              store.delItem(type as ShapeType, item!.id);
            }
          })
        });
        if (delItems.length) {
          if (isSelect) {
            status.selects = [];
          } else {
            status.actives = [];
          }
        }
      } else if (operMode.value.mulSelection && ev.key === "A") {
        if (status.selects.length) {
          status.selects = [];
        } else {
          status.selects = getChildren();
        }
      }
    },
    window
  );
};

export const useAutoService = () => {
  useAutoPaste();
  useShortcutKey();
  // 鼠标自动变化服务
  const status = useMouseShapesStatus();
  const operMode = useOperMode();
  const mode = useMode();
  const cursor = useCursor();
  const { set: setCursor } = cursor.push("initial");

  watchEffect(() => {
    let style: string | null = null;
    if (operMode.value.freeView) {
      style = "pointer";
    } else if (mode.include(Mode.update)) {
      style = "./icons/m_move.png";
    } else if (status.hovers.length) {
      style = "pointer";
    } else {
      style = "initial";
    }
    setCursor(style);
  });

  // 自动保存历史及恢复服务
  const history = useHistory();
  const instanceProps = useInstanceProps();
  const init = (id: any) => {
    const quitHooks: (() => void)[] = [];
    if (!id) return quitHooks;

    const unloadHandler = () => {
      if (history.hasRedo.value || history.hasUndo.value) {
        // history.saveLocal();
      }
    };
    history.setLocalId(id);
    window.addEventListener("beforeunload", unloadHandler);
    quitHooks.push(() =>
      window.removeEventListener("beforeunload", unloadHandler)
    );

    if (!history.hasLocal()) return quitHooks;

    if (!import.meta.env.DEV) {
      let isOpen = true;
      ElMessageBox.confirm("检测到有历史数据，是否要恢复？", {
        type: "info",
        confirmButtonText: "恢复",
        cancelButtonText: "取消",
      })
        .then(() => {
          history.loadLocalStorage();
        })
        .catch(() => {
          history.clearLocal();
        })
        .finally(() => {
          isOpen = false;
        });
      quitHooks.push(() => isOpen && ElMessageBox.close());
    }
    return quitHooks;
  };
  watchEffect((onCleanup) => {
    onCleanup(mergeFuns(init(instanceProps.get().id)));
  });

  useSelectionRevise();
};

export type DrawExpose = ReturnType<typeof useExpose>;
type PickParams<K extends keyof Stage, O extends string> = Stage[K] extends (
  ...args: any
) => any
  ? Omit<Required<Parameters<Stage[K]>>[0], O>
  : never;

export const useExpose = installGlobalVar(() => {
  const mode = useMode();
  const interactiveProps = useInteractiveProps();
  const stage = useStage();
  const layers = useLayers();
  const store = useStore();
  const history = useHistory();
  const viewer = useViewer().viewer;
  const { updateSize } = useGlobalResize();
  const exposeBlob = (config?: PickParams<"toBlob", "callback">) => {
    const $stage = stage.value!.getStage();
    return new Promise<Blob>((resolve) => {
      $stage.toBlob({ ...config, resolve } as any);
    });
  };

  const toggleHit = () => {
    if (!layers.value) return;
    layers.value.forEach((layer) => {
      layer.toggleHitCanvas();
    });
  };

  
  return {
    ...useInteractiveDrawShapeAPI(),
    get stage() {
      const $store = stage.value?.getStage();
      return $store;
    },
    ...useTempStatus(),
    exposeBlob,
    toggleHit,
    formalLayer: useFormalLayer(),
    updateSize,
    history,
    store,
    ...useSetViewport(),
    mode,
    getData() {
      return store.data;
    },
    getViewBoxPositionPixel: useGetViewBoxPositionPixel(),
    viewer,
    presetAdd: interactiveProps,
    config: useConfig(),
    mountMenus: useMountMenusAttachs(),
    proportion: useProportion(),
    getDXF: useGetDXF()
  };
});