import { existsSync } from "node:fs";
import { argv, env, exit } from "node:process";

const args = new Set(argv.slice(2));
const failures = [];

const requireVariable = (name) => {
  if (!env[name]) {
    failures.push(`Missing ${name}`);
  }
};

const requireOneVariable = (names, label) => {
  if (!names.some((name) => env[name])) {
    failures.push(`Missing ${label}: set one of ${names.join(", ")}`);
  }
};

const decodeBase64 = (name) => {
  if (!env[name]) {
    return null;
  }
  try {
    const decoded = Buffer.from(env[name], "base64");
    if (decoded.length === 0) {
      failures.push(`${name} is empty after base64 decoding`);
      return null;
    }
    return decoded;
  } catch {
    failures.push(`${name} is not valid base64`);
    return null;
  }
};

const decodeBase64Json = (name) => {
  const decoded = decodeBase64(name);
  if (!decoded) {
    return null;
  }
  try {
    return JSON.parse(decoded.toString("utf8"));
  } catch {
    failures.push(`${name} is not base64-encoded JSON`);
    return null;
  }
};

const isEnabled = (name) => !["false", "0", "no"].includes(String(env[name] ?? "true").toLowerCase());

const checkAndroid = () => {
  requireVariable("MOBILE_VERSION_NAME");
  requireVariable("MOBILE_VERSION_CODE");
  requireOneVariable(["ANDROID_KEYSTORE_BASE64", "ANDROID_KEYSTORE_FILE"], "Android release keystore");
  requireVariable("ANDROID_KEYSTORE_PASSWORD");
  requireVariable("ANDROID_KEY_ALIAS");
  requireVariable("ANDROID_KEY_PASSWORD");

  if (env.ANDROID_KEYSTORE_FILE && !existsSync(env.ANDROID_KEYSTORE_FILE)) {
    failures.push("ANDROID_KEYSTORE_FILE does not point to an existing file");
  }

  decodeBase64("ANDROID_KEYSTORE_BASE64");

  if (!isEnabled("UPLOAD_ANDROID_TO_PLAY")) {
    return;
  }

  requireVariable("ANDROID_PACKAGE_NAME");
  requireVariable("ANDROID_AAB_PATH");
  requireVariable("GOOGLE_PLAY_SERVICE_ACCOUNT_JSON_BASE64");

  const validTracks = new Set(["production", "beta", "alpha", "internal"]);
  const validStatuses = new Set(["completed", "draft", "inProgress", "halted"]);
  const track = env.PLAY_STORE_TRACK || "production";
  const status = env.PLAY_STORE_RELEASE_STATUS || "completed";

  if (!validTracks.has(track)) {
    failures.push(`PLAY_STORE_TRACK must be one of ${Array.from(validTracks).join(", ")}`);
  }
  if (!validStatuses.has(status)) {
    failures.push(`PLAY_STORE_RELEASE_STATUS must be one of ${Array.from(validStatuses).join(", ")}`);
  }
  if (status === "inProgress") {
    const fraction = Number(env.PLAY_STORE_USER_FRACTION);
    if (!(fraction > 0 && fraction < 1)) {
      failures.push("PLAY_STORE_USER_FRACTION must be greater than 0 and less than 1 when status is inProgress");
    }
  }

  const serviceAccount = decodeBase64Json("GOOGLE_PLAY_SERVICE_ACCOUNT_JSON_BASE64");
  if (serviceAccount) {
    if (!serviceAccount.client_email) {
      failures.push("Google Play service account JSON is missing client_email");
    }
    if (!serviceAccount.private_key) {
      failures.push("Google Play service account JSON is missing private_key");
    }
  }
};

const checkIos = () => {
  requireVariable("MOBILE_VERSION_NAME");
  requireVariable("MOBILE_VERSION_CODE");
  requireVariable("IOS_CERTIFICATE_BASE64");
  requireVariable("IOS_CERTIFICATE_PASSWORD");
  requireVariable("IOS_PROVISION_PROFILE_BASE64");
  requireVariable("IOS_KEYCHAIN_PASSWORD");
  requireVariable("APPLE_TEAM_ID");

  decodeBase64("IOS_CERTIFICATE_BASE64");
  decodeBase64("IOS_PROVISION_PROFILE_BASE64");

  if (!isEnabled("UPLOAD_IOS_TO_APP_STORE")) {
    return;
  }

  requireVariable("APP_STORE_CONNECT_API_KEY_ID");
  requireVariable("APP_STORE_CONNECT_ISSUER_ID");
  requireVariable("APP_STORE_CONNECT_API_PRIVATE_KEY_BASE64");

  const privateKey = decodeBase64("APP_STORE_CONNECT_API_PRIVATE_KEY_BASE64");
  if (privateKey && !privateKey.toString("utf8").includes("PRIVATE KEY")) {
    failures.push("APP_STORE_CONNECT_API_PRIVATE_KEY_BASE64 does not look like a .p8 private key");
  }
};

if (args.has("--android")) {
  checkAndroid();
}

if (args.has("--ios")) {
  checkIos();
}

if (!args.has("--android") && !args.has("--ios")) {
  failures.push("Pass --android or --ios");
}

if (failures.length > 0) {
  console.error("Mobile store upload environment is not configured:");
  for (const failure of failures) {
    console.error(`- ${failure}`);
  }
  exit(1);
}

console.log("Mobile store upload environment is configured.");