import { invoke } from "@tauri-apps/api/tauri";

type PermissionState = "granted" | "denied";

type Format =
  | "QR_CODE"
  | "UPC_A"
  | "UPC_E"
  | "EAN_8"
  | "EAN_13"
  | "CODE_39"
  | "CODE_93"
  | "CODE_128"
  | "CODABAR"
  | "ITF"
  | "AZTEC"
  | "DATA_MATRIX"
  | "PDF_417";

interface ScanOptions {
  cameraDirection?: "back" | "front";
  formats?: Format[];
  windowed?: boolean;
}

interface PrepareOptions {
  cameraDirection?: "back" | "front";
  windowed?: boolean;
}

interface Scanned {
  content: string;
  bounds: unknown;
}

/**
 * Prepare the camera before starting scanning.
 * This is optional, only use it if you need a small performance improvement when preparing a scan in advance.
 * @param options
 */
export async function prepare(options?: PrepareOptions): Promise<void> {
  return await invoke("plugin:barcodeScanner|prepare", { ...options });
}

/**
 * Start scanning.
 * @param options
 */
export async function scan(options?: ScanOptions): Promise<Scanned> {
  return await invoke("plugin:barcodeScanner|scan", { ...options });
}

/**
 * Cancel the current scan process.
 */
export async function cancel(): Promise<void> {
  return await invoke("plugin:barcodeScanner|cancel");
}

/**
 * Get permission state.
 */
export async function checkPermissions(): Promise<PermissionState> {
  return await invoke<{ camera: PermissionState }>(
    "plugin:barcodeScanner|check_permissions"
  ).then((r) => r.camera);
}

/**
 * Request permissions to use the camera.
 */
export async function requestPermissions(): Promise<PermissionState> {
  return await invoke<{ camera: PermissionState }>(
    "plugin:barcodeScanner|request_permissions"
  ).then((r) => r.camera);
}

/**
 * Open application settings. Useful if permission was denied and the user must manually enable it.
 */
export async function openAppSettings(): Promise<void> {
  return await invoke("plugin:barcodeScanner|open_app_settings");
}