// Makes `expo prebuild` safe to re-run: re-applies the hand-maintained Android
// release config that a fresh prebuild would otherwise reset to template
// defaults (android/ is committed; CI builds it and relies on all of this).
const { withAppBuildGradle, withGradleProperties } = require("expo/config-plugins");

const RELEASE_SIGNING = `        release {
            // Keystore path + password come from env (CI) or ~/.android-keys (local).
            def ksPath = System.getenv("KEYSTORE_FILE") ?: "\${System.properties['user.home']}/.android-keys/gtd-release.jks"
            def passFile = new File("\${System.properties['user.home']}/.android-keys/gtd-release.password")
            def ksPass = System.getenv("KEYSTORE_PASSWORD") ?: (passFile.exists() ? passFile.text.trim() : null)
            if (new File(ksPath).exists() && ksPass != null) {
                storeFile file(ksPath)
                storePassword ksPass
                keyAlias System.getenv("KEY_ALIAS") ?: "gtd"
                keyPassword System.getenv("KEY_PASSWORD") ?: ksPass
            }
        }
`;

function patchBuildGradle(gradle) {
  gradle = gradle.replace(/versionCode \d+\n/, 'versionCode ((System.getenv("VERSION_CODE") ?: "1").toInteger())\n');
  gradle = gradle.replace(/versionName "[^"]*"\n/, 'versionName (System.getenv("VERSION_NAME") ?: "1.0-dev")\n');
  if (!gradle.includes("KEYSTORE_FILE")) {
    // Insert the release signing config right after the debug one.
    gradle = gradle.replace(
      /(signingConfigs \{\n        debug \{[\s\S]*?\n        \}\n)/,
      `$1${RELEASE_SIGNING}`,
    );
  }
  // Release builds use the release key when present, debug key otherwise.
  gradle = gradle.replace(
    /(release \{\n)(?:\s*\/\/[^\n]*\n)*\s*signingConfig signingConfigs\.debug\n/,
    "$1            signingConfig signingConfigs.release.storeFile ? signingConfigs.release : signingConfigs.debug\n",
  );
  return gradle;
}

const GRADLE_PROPS = [
  // RN/NDK builds want headroom; the template default is 2 GB.
  { key: "org.gradle.jvmargs", value: "-Xmx8192m -XX:MaxMetaspaceSize=1024m" },
  // arm64 only: Pixel is arm64-v8a; x86/v7a builds are wasted time + APK bloat.
  { key: "reactNativeArchitectures", value: "arm64-v8a" },
];

module.exports = function withAndroidRelease(config) {
  config = withAppBuildGradle(config, (c) => {
    c.modResults.contents = patchBuildGradle(c.modResults.contents);
    return c;
  });
  config = withGradleProperties(config, (c) => {
    for (const { key, value } of GRADLE_PROPS) {
      const existing = c.modResults.find((p) => p.type === "property" && p.key === key);
      if (existing) existing.value = value;
      else c.modResults.push({ type: "property", key, value });
    }
    return c;
  });
  return config;
};