import { Color } from "./base.ts";

/**
 * Color palette requirements.
 *
 * The array represents the "ideal" colors desired by the application.
 * When drawing things, *bg* and *fg* color information should be an index
 * in this palette.
 *
 * For each palette index, a single color can be requested, or an
 * array of accepted alternatives, with decreasing priority.
 *
 * The first color is considered the default background color.
 */
export type UIPalette = ReadonlyArray<Color | ReadonlyArray<Color>>;

/**
 * Configuration of the UI
 */
export type UIConfig = Readonly<{
  // Set the automatic loop interval on init
  // If left undefined, a call to ui.loop() will be required after init
  loopInterval?: number;
  // Ignore the ctrl+c key combo to quit the UI
  ignoreCtrlC: boolean;
  // Initially hide the cursor
  hideCursor: boolean;
  // Palette of colors that will be used by the UI
  palette: UIPalette;
  // Callback to receive resizes
  // The screen has been cleared before this is called
  onResize: (size: { w: number; h: number }) => void;
  // Callback to receive key strokes
  onKeyStroke: (key: string) => void;
  // Callback to receive clicks
  onMouseClick: (loc: { x: number; y: number }) => void;
}>;

export const UI_CONFIG_DEFAULTS: UIConfig = {
  ignoreCtrlC: false,
  hideCursor: true,
  palette: [],
  onResize: () => {},
  onKeyStroke: () => {},
  onMouseClick: () => {},
};