#!/usr/bin/env node
/**
 * Android Release Script - Universal Version
 * 
 * Automatically builds Android APK and uploads to Gitea Release.
 * 
 * Features:
 * - Auto-detect Android project root (standalone or monorepo)
 * - Auto-detect Gitea config from git remote URL (HTTPS/SSH)
 * - Auto-detect Java Home from Android Studio
 * - Support tag-based release workflow
 * 
 * Environment Variables:
 * - GITEA_TOKEN (required): Gitea API token
 * - GITEA_API_URL (optional): Override Gitea API URL
 * - GITEA_OWNER (optional): Override repository owner
 * - GITEA_REPO (optional): Override repository name
 * 
 * Usage:
 *   node release-android.mjs [--project <name>] [android-dir]
 *   
 *   --project <name>  Specify project name (e.g., admin-tool, android)
 *   android-dir       Android project directory (optional, auto-detect if not specified)
 * 
 * Examples:
 *   node release-android.mjs --project admin-tool
 *   node release-android.mjs --project android ./android
 */

import fs from 'node:fs';
import path from 'node:path';
import { execSync } from 'node:child_process';

// ============================================================================
// Project Detection
// ============================================================================

/**
 * Find Android project root directory
 * Looks for app/build.gradle.kts or build.gradle.kts with android plugin
 */
function findAndroidRoot(startDir) {
  const candidates = [
    startDir,                           // Current dir is Android root
    path.join(startDir, 'android'),     // Monorepo: ./android/
    path.join(startDir, '..'),          // Parent dir
  ];

  for (const dir of candidates) {
    const buildGradle = path.join(dir, 'app/build.gradle.kts');
    const buildGradleGroovy = path.join(dir, 'app/build.gradle');
    
    if (fs.existsSync(buildGradle) || fs.existsSync(buildGradleGroovy)) {
      return path.resolve(dir);
    }
  }

  return null;
}

/**
 * Find git repository root
 */
function findGitRoot(startDir) {
  try {
    const result = execSync('git rev-parse --show-toplevel', {
      cwd: startDir,
      encoding: 'utf-8',
      shell: true,
      stdio: ['pipe', 'pipe', 'pipe']
    }).trim();
    return result;
  } catch {
    return null;
  }
}

/**
 * Detect if project is a monorepo (Android is a subdirectory)
 */
function isMonorepo(androidDir, gitRoot) {
  if (!gitRoot) return false;
  return path.resolve(androidDir) !== path.resolve(gitRoot);
}

// ============================================================================
// Git/Gitea Configuration
// ============================================================================

/**
 * Parse git remote URL to extract Gitea configuration
 * Supports both HTTPS and SSH formats
 */
function detectGiteaConfig(gitRoot) {
  try {
    const remoteUrl = execSync('git remote get-url origin', {
      cwd: gitRoot,
      encoding: 'utf-8',
      shell: true,
      stdio: ['pipe', 'pipe', 'pipe']
    }).trim();

    // HTTPS format: https://git.example.com/owner/repo.git
    const httpsMatch = remoteUrl.match(/https?:\/\/([^/]+)\/([^/]+)\/([^/]+?)(\.git)?$/);
    if (httpsMatch) {
      return {
        apiUrl: `https://${httpsMatch[1]}`,
        owner: httpsMatch[2],
        repo: httpsMatch[3]
      };
    }

    // SSH format: git@git.example.com:owner/repo.git
    const sshMatch = remoteUrl.match(/git@([^:]+):([^/]+)\/([^/]+?)(\.git)?$/);
    if (sshMatch) {
      return {
        apiUrl: `https://${sshMatch[1]}`,
        owner: sshMatch[2],
        repo: sshMatch[3]
      };
    }
  } catch {
    // Ignore errors
  }
  return {};
}

// ============================================================================
// Java Detection
// ============================================================================

/**
 * Detect Java Home, prioritizing Android Studio's bundled JDK
 */
function detectJavaHome() {
  const possiblePaths = [
    // macOS - Android Studio bundled JDK
    '/Applications/Android Studio.app/Contents/jbr/Contents/Home',
    '/Applications/Android Studio.app/Contents/jre/Contents/Home',
    // Linux - Android Studio bundled JDK
    `${process.env.HOME}/android-studio/jbr`,
    `${process.env.HOME}/android-studio/jre`,
    // Environment variable
    process.env.JAVA_HOME,
    // Common system paths
    '/usr/lib/jvm/java-11-openjdk',
    '/usr/lib/jvm/java-17-openjdk',
  ];

  for (const javaHome of possiblePaths) {
    if (javaHome && fs.existsSync(javaHome)) {
      const javaBin = path.join(javaHome, 'bin', 'java');
      if (fs.existsSync(javaBin)) {
        return javaHome;
      }
    }
  }

  return null;
}

// ============================================================================
// Version & Tag Management
// ============================================================================

/**
 * Read version from build.gradle.kts
 */
function readVersion(androidDir) {
  const buildGradlePath = path.join(androidDir, 'app/build.gradle.kts');
  const buildGradleGroovyPath = path.join(androidDir, 'app/build.gradle');
  
  let buildGradle;
  if (fs.existsSync(buildGradlePath)) {
    buildGradle = fs.readFileSync(buildGradlePath, 'utf-8');
  } else if (fs.existsSync(buildGradleGroovyPath)) {
    buildGradle = fs.readFileSync(buildGradleGroovyPath, 'utf-8');
  } else {
    return null;
  }

  const versionMatch = buildGradle.match(/versionName\s*[=:]\s*["']([^"']+)["']/);
  return versionMatch ? versionMatch[1] : null;
}

/**
 * Infer project name from Android directory name and git tags
 * Returns the prefix used in tags (e.g., "myapp", "android", or "")
 */
function inferProjectName(gitRoot, androidDir) {
  try {
    // First, try to infer from Android directory name
    const dirName = path.basename(androidDir);
    
    // Get all tags with version pattern
    const tags = execSync('git tag -l --sort=-version:refname', {
      cwd: gitRoot,
      encoding: 'utf-8',
      shell: true,
      stdio: ['pipe', 'pipe', 'pipe']
    }).trim().split('\n').filter(Boolean);

    if (tags.length === 0) {
      return null;
    }

    // If directory name matches any tag prefix, prefer that
    // For example: if dir is "admin-tool", look for "admin-tool-*" tags
    const dirPrefixTags = tags.filter(tag => tag.startsWith(`${dirName}-`));
    if (dirPrefixTags.length > 0) {
      return dirName;
    }

    // If directory is "android" or "app", try "android" prefix
    if (dirName === 'android' || dirName === 'app') {
      const androidTags = tags.filter(tag => tag.startsWith('android-'));
      if (androidTags.length > 0) {
        return 'android';
      }
    }

    // Fallback: try to extract prefix from recent tags
    // Patterns: "myapp-1.0.0", "android-1.0.0", "v1.0.0"
    for (const tag of tags.slice(0, 10)) { // Check recent 10 tags
      const match = tag.match(/^(.+?)-\d+\.\d+/);
      if (match) {
        return match[1]; // Return prefix like "myapp", "android"
      }
      if (tag.match(/^v\d+\.\d+/)) {
        return ''; // v-prefix style (no project name)
      }
    }

    return null;
  } catch {
    return null;
  }
}

/**
 * Get latest tag that matches the pattern
 */
function getLatestTag(gitRoot, projectPrefix) {
  try {
    const pattern = projectPrefix ? `${projectPrefix}-*` : 'v*';
    const tag = execSync(`git tag -l '${pattern}' --sort=-version:refname | head -1`, {
      cwd: gitRoot,
      encoding: 'utf-8',
      shell: true,
      stdio: ['pipe', 'pipe', 'pipe']
    }).trim();

    return tag || null;
  } catch {
    return null;
  }
}

/**
 * Get tag information (check existence and get annotation)
 */
function getTagInfo(tagName, gitRoot) {
  try {
    const tagExists = execSync(`git tag -l ${tagName}`, {
      cwd: gitRoot,
      encoding: 'utf-8',
      shell: true,
      stdio: ['pipe', 'pipe', 'pipe']
    }).trim();

    if (!tagExists) {
      return { exists: false };
    }

    // Get tag annotation
    const annotation = execSync(`git tag -l --format='%(contents)' ${tagName}`, {
      cwd: gitRoot,
      encoding: 'utf-8',
      shell: true,
      stdio: ['pipe', 'pipe', 'pipe']
    }).trim();

    if (annotation) {
      return { exists: true, message: annotation };
    }

    // Fall back to commit message
    const commitMsg = execSync(`git log -1 --format=%B ${tagName}`, {
      cwd: gitRoot,
      encoding: 'utf-8',
      shell: true,
      stdio: ['pipe', 'pipe', 'pipe']
    }).trim();

    return { exists: true, message: commitMsg || `Release ${tagName}` };
  } catch {
    return { exists: false };
  }
}

// ============================================================================
// Build & Upload
// ============================================================================

/**
 * Build Android APK
 */
function buildApk(androidDir, javaHome) {
  console.log('正在构建 APK...');
  execSync('./gradlew assembleRelease --quiet', {
    cwd: androidDir,
    stdio: 'inherit',
    shell: true,
    env: { ...process.env, JAVA_HOME: javaHome }
  });
}

/**
 * Find built APK file
 */
function findApk(androidDir) {
  const signedApkPath = path.join(androidDir, 'app/build/outputs/apk/release/app-release.apk');
  const unsignedApkPath = path.join(androidDir, 'app/build/outputs/apk/release/app-release-unsigned.apk');

  if (fs.existsSync(signedApkPath)) {
    return { path: signedApkPath, signed: true };
  } else if (fs.existsSync(unsignedApkPath)) {
    return { path: unsignedApkPath, signed: false };
  }
  return null;
}

/**
 * Execute curl and return JSON response
 */
function curlJson(cmd) {
  try {
    const result = execSync(cmd, { encoding: 'utf-8', shell: true, stdio: ['pipe', 'pipe', 'pipe'] });
    return JSON.parse(result);
  } catch {
    return null;
  }
}

/**
 * Upload APK to Gitea Release
 */
function uploadToGitea(config) {
  const { apiUrl, owner, repo, token, tagName, fileName, apkPath, releaseMessage } = config;
  
  const repoApiBase = `${apiUrl}/api/v1/repos/${owner}/${repo}`;
  
  // Get or create release
  let releaseId;
  const releases = curlJson(
    `curl -s -H "Authorization: token ${token}" "${repoApiBase}/releases"`
  );

  if (Array.isArray(releases)) {
    const existingRelease = releases.find((r) => r.tag_name === tagName);
    if (existingRelease) {
      releaseId = existingRelease.id;
      console.log(`找到已存在的 Release (ID: ${releaseId})`);

      // Delete existing asset with same name
      const existingAsset = (existingRelease.assets || []).find((a) => a.name === fileName);
      if (existingAsset) {
        console.log(`删除已存在的文件: ${fileName}`);
        execSync(
          `curl -s -X DELETE -H "Authorization: token ${token}" "${repoApiBase}/releases/${releaseId}/assets/${existingAsset.id}"`,
          { shell: true, stdio: ['pipe', 'pipe', 'pipe'] }
        );
      }
    }
  }

  if (!releaseId) {
    console.log('创建新 Release...');
    const releaseData = {
      tag_name: tagName,
      name: `Android APK ${tagName}`,
      body: releaseMessage,
      draft: false,
      prerelease: false
    };

    const tempJsonPath = path.join(process.cwd(), '.release-data.json');
    fs.writeFileSync(tempJsonPath, JSON.stringify(releaseData));

    const releaseInfo = curlJson(
      `curl -s -X POST "${repoApiBase}/releases" \
        -H "Authorization: token ${token}" \
        -H "Content-Type: application/json" \
        -d @${tempJsonPath}`
    );

    fs.unlinkSync(tempJsonPath);

    if (!releaseInfo || !releaseInfo.id) {
      throw new Error(`Failed to create release: ${JSON.stringify(releaseInfo)}`);
    }

    releaseId = releaseInfo.id;
    console.log(`Release 已创建 (ID: ${releaseId})`);
  }

  // Upload APK
  console.log('上传 APK...');
  const uploadUrl = `${repoApiBase}/releases/${releaseId}/assets?name=${encodeURIComponent(fileName)}`;
  const uploadResult = curlJson(
    `curl -s -X POST "${uploadUrl}" \
      -H "Authorization: token ${token}" \
      -F "attachment=@${apkPath}"`
  );

  if (!uploadResult || !uploadResult.id) {
    throw new Error(`Failed to upload APK: ${JSON.stringify(uploadResult)}`);
  }

  return {
    releaseUrl: `${apiUrl}/${owner}/${repo}/releases/tag/${tagName}`,
    fileSize: uploadResult.size
  };
}

// ============================================================================
// Main
// ============================================================================

/**
 * Parse command line arguments
 */
function parseArgs() {
  const args = process.argv.slice(2);
  let projectName = null;
  let androidDir = null;

  for (let i = 0; i < args.length; i++) {
    const arg = args[i];
    if (arg === '--project' && i + 1 < args.length) {
      projectName = args[i + 1];
      i++; // skip next arg
    } else if (!arg.startsWith('--')) {
      androidDir = arg;
    }
  }

  return { projectName, androidDir };
}

function main() {
  const cwd = process.cwd();
  const { projectName, androidDir: argDir } = parseArgs();

  console.log('='.repeat(60));
  console.log('Android 发布脚本');
  console.log('='.repeat(60));

  // 1. Find Android project root
  const searchDir = argDir ? path.resolve(cwd, argDir) : cwd;
  const androidDir = findAndroidRoot(searchDir);
  
  if (!androidDir) {
    console.error('错误：找不到 Android 项目');
    console.error('请确保当前目录是 Android 项目或指定正确的路径');
    console.error('用法: release-android [android-dir]');
    process.exit(1);
  }
  console.log(`Android 项目: ${androidDir}`);

  // 2. Find git root
  const gitRoot = findGitRoot(androidDir);
  if (!gitRoot) {
    console.error('错误：不是 git 仓库');
    process.exit(1);
  }
  console.log(`Git 根目录: ${gitRoot}`);

  const monorepo = isMonorepo(androidDir, gitRoot);
  console.log(`项目类型: ${monorepo ? 'Monorepo' : '独立项目'}`);

  // 3. Detect Gitea configuration
  const detected = detectGiteaConfig(gitRoot);
  const GITEA_TOKEN = process.env.GITEA_TOKEN || '';
  const GITEA_API_URL = process.env.GITEA_API_URL || detected.apiUrl || '';
  const GITEA_OWNER = process.env.GITEA_OWNER || detected.owner || '';
  const GITEA_REPO = process.env.GITEA_REPO || detected.repo || '';

  if (!GITEA_TOKEN) {
    console.error('错误：未设置 GITEA_TOKEN 环境变量');
    console.error('请设置: export GITEA_TOKEN="your_token"');
    process.exit(1);
  }

  if (!GITEA_API_URL || !GITEA_OWNER || !GITEA_REPO) {
    console.error('错误：无法检测 Gitea 仓库配置');
    console.error('请设置环境变量: GITEA_API_URL, GITEA_OWNER, GITEA_REPO');
    process.exit(1);
  }

  console.log(`Gitea: ${GITEA_API_URL}/${GITEA_OWNER}/${GITEA_REPO}`);

  // 4. Read version
  const version = readVersion(androidDir);
  if (!version) {
    console.error('错误：无法从 build.gradle 读取 versionName');
    process.exit(1);
  }
  console.log(`版本: ${version}`);

  // 5. Determine project prefix
  let projectPrefix;
  
  if (projectName) {
    // Use provided project name
    console.log(`项目前缀: ${projectName} (指定)`);
    projectPrefix = projectName;
    
    // Verify that tags with this prefix exist
    const testTag = getLatestTag(gitRoot, projectPrefix);
    if (!testTag) {
      console.error(`错误：找不到匹配 "${projectPrefix}-*" 模式的 git tag`);
      console.error('');
      console.error('可用的 tags:');
      try {
        const allTags = execSync('git tag -l --sort=-version:refname | head -10', {
          cwd: gitRoot,
          encoding: 'utf-8',
          shell: true,
          stdio: ['pipe', 'pipe', 'pipe']
        }).trim();
        console.error(allTags || '  (未找到 tags)');
      } catch {
        console.error('  (无法列出 tags)');
      }
      console.error('');
      console.error(`请创建正确前缀的 tag:`);
      console.error(`  git tag -a ${projectPrefix}-${version} -m "发布说明"`);
      console.error(`  git push origin ${projectPrefix}-${version}`);
      process.exit(1);
    }
  } else {
    // Infer project name from directory and tags
    projectPrefix = inferProjectName(gitRoot, androidDir);
    if (projectPrefix === null) {
      console.error('错误：无法从 git tags 推断项目名称');
      console.error('请确保至少存在一个以下格式的 tag:');
      console.error('  myapp-1.0.0  或  v1.0.0');
      console.error('');
      console.error('或使用 --project 明确指定项目名称:');
      console.error('  node release-android.mjs --project admin-tool');
      process.exit(1);
    }
    console.log(`项目前缀: ${projectPrefix || '(v-style)'} (自动检测)`);
  }

  const tagName = getLatestTag(gitRoot, projectPrefix);
  if (!tagName) {
    const expectedTag = projectPrefix ? `${projectPrefix}-${version}` : `v${version}`;
    console.error(`错误：找不到匹配的 git tag`);
    console.error(`期望的 tag 格式: ${expectedTag}`);
    console.error('');
    console.error('请先创建 tag:');
    console.error(`  git tag -a ${expectedTag} -m "发布说明"`);
    console.error(`  git push origin ${expectedTag}`);
    process.exit(1);
  }

  const tagInfo = getTagInfo(tagName, gitRoot);
  if (!tagInfo.exists) {
    console.error(`错误：Git tag "${tagName}" 不存在`);
    console.error('请推送 tag:');
    console.error(`  git push origin ${tagName}`);
    process.exit(1);
  }
  console.log(`Tag: ${tagName}`);

  // 6. Detect Java
  const javaHome = detectJavaHome();
  if (!javaHome) {
    console.error('错误：找不到 Java 运行环境');
    console.error('请安装 JDK 或确保 Android Studio 已正确安装');
    process.exit(1);
  }
  console.log(`Java: ${javaHome}`);

  console.log('');
  console.log('开始构建...');

  // 7. Build APK
  try {
    buildApk(androidDir, javaHome);
  } catch (err) {
    console.error('构建失败:', err.message);
    process.exit(1);
  }

  // 8. Find APK
  const apk = findApk(androidDir);
  if (!apk) {
    console.error('错误：找不到 APK 文件');
    console.error('检查构建输出: app/build/outputs/apk/release/');
    process.exit(1);
  }
  console.log(`APK: ${apk.path} (${apk.signed ? '已签名' : '未签名'})`);

  // 9. Upload to Gitea
  const fileName = projectPrefix 
    ? `${projectPrefix}-${version}.apk`
    : `${GITEA_REPO}-${version}.apk`;
  
  console.log('');
  console.log('上传到 Gitea...');

  try {
    const result = uploadToGitea({
      apiUrl: GITEA_API_URL,
      owner: GITEA_OWNER,
      repo: GITEA_REPO,
      token: GITEA_TOKEN,
      tagName,
      fileName,
      apkPath: apk.path,
      releaseMessage: tagInfo.message
    });

    console.log('');
    console.log('='.repeat(60));
    console.log('发布成功！');
    console.log(`文件: ${fileName}`);
    console.log(`大小: ${(result.fileSize / 1024 / 1024).toFixed(2)} MB`);
    console.log(`URL: ${result.releaseUrl}`);
    console.log('='.repeat(60));
  } catch (err) {
    console.error('上传失败:', err.message);
    process.exit(1);
  }
}

main();