import {
  AndroidConfig,
  type ConfigPlugin,
  createRunOncePlugin,
  IOSConfig,
  withAndroidManifest,
  withEntitlementsPlist,
} from '@expo/config-plugins';

const {
  addMetaDataItemToMainApplication,
  getMainApplicationOrThrow,
  removeMetaDataItemFromMainApplication,
} = AndroidConfig.Manifest;

const pkg = require('stripe-react-native-apple-pay/package.json');

type StripePluginProps = {
  /**
   * The iOS merchant ID used for enabling Apple Pay.
   * Without this, the error "Missing merchant identifier" will be thrown on iOS.
   */
  merchantIdentifier: string | string[];
  enableGooglePay: boolean;
};

const withStripe: ConfigPlugin<StripePluginProps> = (config, props) => {
  config = withStripeIos(config, props);
  config = withNoopSwiftFile(config);
  config = withStripeAndroid(config, props);
  return config;
};

const withStripeIos: ConfigPlugin<StripePluginProps> = (
  expoConfig,
  { merchantIdentifier }
) => {
  return withEntitlementsPlist(expoConfig, (config) => {
    config.modResults = setApplePayEntitlement(
      merchantIdentifier,
      config.modResults
    );
    return config;
  });
};

/**
 * Adds the following to the entitlements:
 *
 * <key>com.apple.developer.in-app-payments</key>
 * <array>
 *	 <string>[MERCHANT_IDENTIFIER]</string>
 * </array>
 */
export function setApplePayEntitlement(
  merchantIdentifiers: string | string[],
  entitlements: Record<string, any>
): Record<string, any> {
  const key = 'com.apple.developer.in-app-payments';

  const merchants: string[] = entitlements[key] ?? [];

  if (!Array.isArray(merchantIdentifiers)) {
    merchantIdentifiers = [merchantIdentifiers];
  }

  for (const id of merchantIdentifiers) {
    if (id && !merchants.includes(id)) {
      merchants.push(id);
    }
  }

  if (merchants.length) {
    entitlements[key] = merchants;
  }
  return entitlements;
}

/**
 * Add a blank Swift file to the Xcode project for Swift compatibility.
 */
export const withNoopSwiftFile: ConfigPlugin = (config) => {
  return IOSConfig.XcodeProjectFile.withBuildSourceFile(config, {
    filePath: 'noop-file.swift',
    contents: [
      '//',
      '// @generated',
      '// A blank Swift file must be created for native modules with Swift files to work correctly.',
      '//',
      '',
    ].join('\n'),
  });
};

const withStripeAndroid: ConfigPlugin<StripePluginProps> = (
  expoConfig,
  { enableGooglePay = false }
) => {
  return withAndroidManifest(expoConfig, (config) => {
    config.modResults = setGooglePayMetaData(
      enableGooglePay,
      config.modResults
    );

    return config;
  });
};

/**
 * Adds the following to AndroidManifest.xml:
 *
 * <application>
 *   ...
 *	 <meta-data
 *     android:name="com.google.android.gms.wallet.api.enabled"
 *     android:value="true|false" />
 * </application>
 */
export function setGooglePayMetaData(
  enabled: boolean,
  modResults: AndroidConfig.Manifest.AndroidManifest
): AndroidConfig.Manifest.AndroidManifest {
  const GOOGLE_PAY_META_NAME = 'com.google.android.gms.wallet.api.enabled';
  const mainApplication = getMainApplicationOrThrow(modResults);
  if (enabled) {
    addMetaDataItemToMainApplication(
      mainApplication,
      GOOGLE_PAY_META_NAME,
      'true'
    );
  } else {
    removeMetaDataItemFromMainApplication(
      mainApplication,
      GOOGLE_PAY_META_NAME
    );
  }

  return modResults;
}

export default createRunOncePlugin(withStripe, pkg.name, pkg.version);