const { withAppDelegate, withInfoPlist } = require('expo/config-plugins');

/**
 * iOS 27 aborts at launch unless the app adopts the UIScene life cycle. Expo
 * ships `ExpoAppSceneDelegate` for this, but the SDK 57 template still starts
 * React Native from the app delegate, so register the scene delegate and let it
 * own the window.
 */
function withSceneManifest(config) {
  return withInfoPlist(config, (cfg) => {
    cfg.modResults.UIApplicationSceneManifest = {
      UIApplicationSupportsMultipleScenes: false,
      UISceneConfigurations: {
        UIWindowSceneSessionRoleApplication: [
          {
            UISceneConfigurationName: 'Default Configuration',
            UISceneDelegateClassName: 'EXExpoAppSceneDelegate',
          },
        ],
      },
    };
    return cfg;
  });
}

function withSceneAppDelegate(config) {
  return withAppDelegate(config, (cfg) => {
    if (cfg.modResults.language !== 'swift') {
      throw new Error('withSceneLifecycle only supports a Swift AppDelegate');
    }
    let src = cfg.modResults.contents;

    if (!src.includes('ExpoReactNativeFactoryProvider')) {
      src = src.replace(
        /class AppDelegate: ExpoAppDelegate \{/,
        'class AppDelegate: ExpoAppDelegate, ExpoReactNativeFactoryProvider {',
      );
    }

    src = src.replace(
      /\n#if os\(iOS\) \|\| os\(tvOS\)\n\s*window = UIWindow\(frame: UIScreen\.main\.bounds\)\n\s*factory\.startReactNative\([\s\S]*?\)\n#endif\n/,
      '',
    );

    if (!src.includes('ExpoReactNativeFactoryProvider') || src.includes('UIWindow(frame: UIScreen.main.bounds)')) {
      throw new Error('withSceneLifecycle could not patch AppDelegate.swift; the Expo template has changed');
    }
    cfg.modResults.contents = src;
    return cfg;
  });
}

module.exports = function withSceneLifecycle(config) {
  return withSceneAppDelegate(withSceneManifest(config));
};