const fs = require("node:fs");
const path = require("node:path");
const { withAppBuildGradle } = require("expo/config-plugins");

const CREDENTIAL_PATH = path.resolve(
  __dirname,
  "../credentials/credentials.json"
);

const KEYSTORE_PATH = path.resolve(
  __dirname,
  "../credentials/oneao-android.keystore"
);

module.exports = function withAndroidSignature(config) {
  return withAppBuildGradle(config, (config) => {
    if (config.modResults.language !== "groovy") {
      throw new Error("only groovy build.gradle is supported");
    }

    config.modResults.contents = setAndroidSignature(
      config.modResults.contents
    );

    return config;
  });
};

// ======================== 主入口 ========================
function setAndroidSignature(appBuildGradle) {
  if (!fs.existsSync(CREDENTIAL_PATH)) {
    console.warn("⚠️ credentials.json 不存在，跳过签名配置");
    return appBuildGradle;
  }

  const info = JSON.parse(
    fs.readFileSync(CREDENTIAL_PATH, "utf8")
  );

  let output = appBuildGradle;

  // ⭐ 1. 重写 signingConfigs（关键）
  output = replaceSigningConfigs(output, info);

  // ⭐ 2. 确保所有 debug/release 使用统一 keystore
  output = unifySigningUsage(output);

  return output;
}

// ======================== ⭐核心：重写 signingConfigs ========================
function replaceSigningConfigs(appBuildGradle, info) {
  const block = `
    signingConfigs {
        release {
            storeFile file(${JSON.stringify(KEYSTORE_PATH)})
            storePassword ${JSON.stringify(info.android.keystore.keystorePassword)}
            keyAlias ${JSON.stringify(info.android.keystore.keyAlias)}
            keyPassword ${JSON.stringify(info.android.keystore.keyPassword)}
        }

        debug {
            storeFile file(${JSON.stringify(KEYSTORE_PATH)})
            storePassword ${JSON.stringify(info.android.keystore.keystorePassword)}
            keyAlias ${JSON.stringify(info.android.keystore.keyAlias)}
            keyPassword ${JSON.stringify(info.android.keystore.keyPassword)}
        }
    }
  `;

  const regex = /signingConfigs\s*\{[\s\S]*?\n\s*\}/m;

  if (regex.test(appBuildGradle)) {
    return appBuildGradle.replace(regex, block.trim());
  }

  // 没有就插入
  return appBuildGradle.replace(
    /(android\s*\{)/,
    `$1\n${block.trim()}`
  );
}

// ======================== ⭐统一使用 signingConfig ========================
function unifySigningUsage(appBuildGradle) {
  let output = appBuildGradle;

  // debug -> release（你如果想 debug 也用 release，可以改这里）
  output = output.replace(
    /signingConfig\s+signingConfigs\.debug/g,
    "signingConfig signingConfigs.release"
  );

  return output;
}