import { readFileSync, writeFileSync, existsSync } from 'fs';
import { join, dirname } from 'path';
import { fileURLToPath } from 'url';

const __dirname = dirname(fileURLToPath(import.meta.url));
const PROJECT_ROOT = join(__dirname, '..', '..');

// Shared Coolify config from gitea.repo.management
const COOLIFY_CONFIG_PATH = join(PROJECT_ROOT, '..', 'gitea.repo.management', 'config.json');

// Local deployment config
const DEPLOY_CONFIG_PATH = join(PROJECT_ROOT, 'deployment-config.json');

// SSH credentials from app/.env
const ENV_PATH = join(PROJECT_ROOT, 'app', '.env');

let _coolifyCache = null;
let _deployCache = null;

export function loadConfig() {
  if (_coolifyCache) return _coolifyCache;
  if (!existsSync(COOLIFY_CONFIG_PATH)) {
    throw new Error(`Coolify config not found at ${COOLIFY_CONFIG_PATH}`);
  }
  _coolifyCache = JSON.parse(readFileSync(COOLIFY_CONFIG_PATH, 'utf8'));
  return _coolifyCache;
}

export function reloadConfig() {
  _coolifyCache = null;
  return loadConfig();
}

export function loadDeployConfig() {
  if (_deployCache) return _deployCache;
  if (!existsSync(DEPLOY_CONFIG_PATH)) {
    _deployCache = { servers: [], projectsRoot: 'C:\\.bucket\\repos.gitea', projects: {} };
    return _deployCache;
  }
  _deployCache = JSON.parse(readFileSync(DEPLOY_CONFIG_PATH, 'utf8'));
  return _deployCache;
}

export function saveDeployConfig(config) {
  writeFileSync(DEPLOY_CONFIG_PATH, JSON.stringify(config, null, 2));
  _deployCache = config;
}

export function reloadDeployConfig() {
  _deployCache = null;
  return loadDeployConfig();
}

export function loadEnv() {
  if (!existsSync(ENV_PATH)) return {};
  const content = readFileSync(ENV_PATH, 'utf8');
  const env = {};
  for (const line of content.split('\n')) {
    if (line.startsWith('#') || !line.includes('=')) continue;
    const [key, ...valueParts] = line.split('=');
    if (key && valueParts.length > 0) {
      env[key.trim()] = valueParts.join('=').trim();
    }
  }
  return env;
}

export function getProjectsRoot() {
  return loadDeployConfig().projectsRoot || 'C:\\.bucket\\repos.gitea';
}

export function getServerSshConfig(server) {
  const env = loadEnv();
  return {
    host: server.host,
    port: 22,
    username: env.SSH_USERNAME || server.username,
    password: env.SSH_PASSWORD || server.password,
    useSudo: server.useSudo || false,
  };
}