import { BrowserWindow } from "@electron/remote";
import { MutableRefObject } from "react";
import {
  HotkeyCallback,
  Keys,
  isHotkeyPressed as _isHotkeyPressed,
  useHotkeys as _useHotkeys,
} from "react-hotkeys-hook";
import { OptionsOrDependencyArray, RefType } from "react-hotkeys-hook/dist/types";
import { Key } from "ts-key-enum";

export const isMacos = process.platform === "darwin";

let forceTarget: HTMLElement | undefined;

const hotkey = (key: string) => {
  if (key.indexOf("ctrl") >= 0 && isMacos) {
    key = key.replace("ctrl", Key.Meta);
  }
  return key.toLowerCase();
};

export const isHotkeyPressed = (key: string) => {
  if (!key) {
    return false;
  } else if (key.indexOf("ctrl") >= 0 && isMacos) {
    key = key.replace("ctrl", Key.Meta);
  }
  return _isHotkeyPressed(key.toLowerCase(), "+");
};

export function useHotkeys<T extends HTMLElement>(
  keys: Keys,
  callback: HotkeyCallback,
  options?: OptionsOrDependencyArray,
  dependencies?: OptionsOrDependencyArray
): MutableRefObject<RefType<T>> {
  if (keys instanceof Array) {
    keys = keys.filter((v) => !!v);
  }
  return _useHotkeys(keys, callback, options, dependencies);
}

export const Hotkey = {
  Backspace: Key.Backspace,
  Build: hotkey("ctrl+b"),
  CloseEditor: hotkey("ctrl+w"),
  Copy: hotkey("ctrl+c"),
  Delete: Key.Delete,
  Duplicate: hotkey("ctrl+d"),
  Enter: Key.Enter,
  Escape: Key.Escape,
  F2: Key.F2,
  Insert: Key.Insert,
  MacDelete: isMacos ? hotkey("ctrl+backspace") : "",
  Paste: hotkey("ctrl+v"),
  Redo: isMacos ? hotkey("shift+ctrl+z") : hotkey("ctrl+y"),
  Replace: hotkey("shift+ctrl+v"),
  Save: hotkey("ctrl+s"),
  Search: hotkey("ctrl+p"),
  Undo: hotkey("ctrl+z"),
};

export const setInputFocus = (target: HTMLElement) => {
  forceTarget = target;
};

export const sendInputEvent = (key: string) => {
  const webContents = BrowserWindow.getFocusedWindow()?.webContents;
  if (webContents) {
    let keyCode: string | undefined;
    const modifiers: Electron.InputEvent["modifiers"] = [];
    key.split("+").forEach((v) => {
      if (v.indexOf("ctrl") >= 0) {
        modifiers.push("ctrl");
      } else if (v.indexOf("shift") >= 0) {
        modifiers.push("shift");
      } else if (v.indexOf("alt") >= 0) {
        modifiers.push("alt");
      } else if (v.indexOf("meta") >= 0) {
        modifiers.push("meta");
      } else {
        keyCode = v;
      }
    });
    if (!keyCode) {
      return;
    }
    forceTarget?.focus();
    modifiers.forEach((mod) => {
      webContents.sendInputEvent({
        type: "keyDown",
        keyCode: mod,
      });
    });
    webContents.sendInputEvent({ type: "keyDown", keyCode: keyCode, modifiers: modifiers });
    webContents.sendInputEvent({ type: "keyUp", keyCode: keyCode, modifiers: modifiers });
    modifiers.forEach((mod) => {
      webContents.sendInputEvent({
        type: "keyUp",
        keyCode: mod,
      });
    });
  }
};