import type { Dispatch } from "@commands/dispatcher";

export type Keybind = string;

export type KeybindEvent = {
  key: string;
  code: string;
  altKey: boolean;
  ctrlKey: boolean;
  metaKey: boolean;
  shiftKey: boolean;
};

export type GlobalKeybindConsumer = (event: KeybindEvent) => boolean;

export type CommandKeybind = {
  commandId: string;
  payload?: unknown;
};

export type KeybindMap = ReadonlyMap<Keybind, CommandKeybind>;

export function keybindFromEvent(event: KeybindEvent): Keybind {
  const parts = [
    event.metaKey ? "Meta" : undefined,
    event.ctrlKey ? "Ctrl" : undefined,
    event.altKey ? "Alt" : undefined,
    event.shiftKey ? "Shift" : undefined,
    event.key,
  ].filter(Boolean);

  return parts.join("+");
}

export function handleKeybind(options: {
  event: KeybindEvent;
  globalConsumer: GlobalKeybindConsumer;
  keybindMap: KeybindMap;
  dispatch: Dispatch;
}): boolean {
  if (options.globalConsumer(options.event)) return true;

  const command = options.keybindMap.get(keybindFromEvent(options.event));
  if (!command) return false;

  options.dispatch(command.commandId, command.payload);
  return true;
}