import type { KeybindEmitter } from "./keybindEmitter";

export type KeyCode = string;
export enum ModifierKey {
  Shift = 'Shift',
  Control = 'Ctrl',
  Alt = 'Alt',
  Meta = 'Meta'
}
export type Modifiers = Array<ModifierKey>;

export interface KeyCommand{
  key: KeyCode;
  modifiers: Modifiers;
}

export interface CommandMap {
  command: KeyCommand[];
  callback: () => void;
}

export const KeybindEventTypes = {
  SequenceProgress: "sequenceProgress",
  CommandMatched: "commandMatched",
  SequenceTimeout: "sequenceTimeout",
  SequenceNoMatch: "sequenceNoMatch",
} as const;

export type KeybindEventType = (typeof KeybindEventTypes)[keyof typeof KeybindEventTypes];

export type KeybindEvent =
  | { type: typeof KeybindEventTypes.SequenceProgress; pressedKeys: KeyCommand[] }
  | { type: typeof KeybindEventTypes.CommandMatched; callback: (() => void) | null }
  | { type: typeof KeybindEventTypes.SequenceTimeout; }
  | { type: typeof KeybindEventTypes.SequenceNoMatch; };

export type KeyEventHandler = (event: KeyboardEvent) => void;
export interface KeyHandlerReturn {
  handler: KeyEventHandler;
  emitter: KeybindEmitter;
}