let withMainApplication, withAndroidManifest;

try {
  const cp = require('@expo/config-plugins');
  withMainApplication = cp.withMainApplication;
  withAndroidManifest = cp.withAndroidManifest;
} catch {
  // @expo/config-plugins not available locally (no mobile/node_modules).
  // EAS cloud servers install it; just pass through the config unchanged here.
  module.exports = function withPushy(config) { return config; };
  return;
}

function withPushyMainApplication(config) {
  return withMainApplication(config, (config) => {
    const contents = config.modResults.contents;
    const filePath = config.modResults.path || '';
    const isKotlin = filePath.endsWith('.kt');

    const importStatement = isKotlin
      ? 'import me.pushy.sdk.Pushy'
      : 'import me.pushy.sdk.Pushy;';

    let updated = contents;

    // --- Import injection -----------------------------------------------
    if (!updated.includes('me.pushy.sdk.Pushy')) {
      // Match 'import android.app.Application' with or without semicolon
      const importRegex = /(import android\.app\.Application[;]?)/;
      if (importRegex.test(updated)) {
        updated = updated.replace(importRegex, `$1\n${importStatement}`);
      } else {
        console.warn('[withPushy] Could not find import anchor in MainApplication; Pushy import not injected.');
      }
    }

    // --- Pushy.listen() injection ----------------------------------------
    if (!updated.includes('Pushy.listen(this)')) {
      // Match 'super.onCreate()' or 'super.onCreate();' with leading whitespace.
      // Use [ \t]* (not \s*) to avoid consuming the newline after the call,
      // which would merge the next statement onto the same line and break Kotlin syntax.
      const onCreateRegex = /([ \t]*super\.onCreate\(\)[ \t]*;?)/;
      if (onCreateRegex.test(updated)) {
        const callStatement = isKotlin
          ? '\n    Pushy.listen(this)'
          : '\n    Pushy.listen(this);';
        // Replace only the first occurrence (the one inside onCreate)
        updated = updated.replace(onCreateRegex, `$1${callStatement}`);
      } else {
        console.warn('[withPushy] Could not find super.onCreate() in MainApplication; Pushy.listen not injected.');
      }
    }

    config.modResults.contents = updated;
    return config;
  });
}

function withPushyManifest(config) {
  return withAndroidManifest(config, (config) => {
    const manifest = config.modResults.manifest;
    if (!manifest['uses-permission']) {
      manifest['uses-permission'] = [];
    }
    const perms = manifest['uses-permission'];
    const wakeLock = 'android.permission.WAKE_LOCK';
    if (!perms.some((p) => p.$?.['android:name'] === wakeLock)) {
      perms.push({ $: { 'android:name': wakeLock } });
    }
    return config;
  });
}

module.exports = function withPushy(config) {
  config = withPushyMainApplication(config);
  config = withPushyManifest(config);
  return config;
};