import { execFileSync, spawn } from 'node:child_process';
import { existsSync, readFileSync } from 'node:fs';
import { resolve } from 'node:path';

const repoRoot = process.cwd();
const apiServerExePath = resolve(
  repoRoot,
  'server-rs/target/debug/api-server.exe',
);

function loadEnvFile(path, target) {
  if (!existsSync(path)) {
    return;
  }

  const rawText = readFileSync(path, 'utf8');
  for (const rawLine of rawText.split(/\r?\n/u)) {
    const line = rawLine.trim();
    if (!line || line.startsWith('#')) {
      continue;
    }

    const match = line.match(/^([A-Za-z_][A-Za-z0-9_]*)=(.*)$/u);
    if (!match) {
      continue;
    }

    const [, key, rawValue] = match;
    if (target[key] !== undefined) {
      continue;
    }

    target[key] = rawValue.replace(/^['"]|['"]$/gu, '');
  }
}

const mergedEnv = { ...process.env };
loadEnvFile(resolve(repoRoot, '.env'), mergedEnv);
loadEnvFile(resolve(repoRoot, '.env.local'), mergedEnv);

mergedEnv.GENARRATIVE_API_HOST = mergedEnv.GENARRATIVE_API_HOST || '127.0.0.1';
mergedEnv.GENARRATIVE_API_PORT = mergedEnv.GENARRATIVE_API_PORT || '3100';
mergedEnv.GENARRATIVE_SPACETIME_SERVER_URL =
  mergedEnv.GENARRATIVE_SPACETIME_SERVER_URL || 'http://127.0.0.1:3101';
mergedEnv.GENARRATIVE_SPACETIME_DATABASE = mergedEnv.GENARRATIVE_SPACETIME_DATABASE || '';
mergedEnv.GENARRATIVE_SPACETIME_TOKEN = mergedEnv.GENARRATIVE_SPACETIME_TOKEN || '';

if (!mergedEnv.GENARRATIVE_SPACETIME_DATABASE) {
  console.error(
    '[api-server] 缺少 GENARRATIVE_SPACETIME_DATABASE。',
  );
  process.exit(1);
}

function stopExistingWindowsApiServer() {
  if (process.platform !== 'win32') {
    return;
  }

  // Windows 下 cargo 重新编译时无法覆盖仍在运行的 exe，只清理本仓库 target 内的旧进程。
  const command = [
    '$ErrorActionPreference = "Continue"',
    '$target = [System.IO.Path]::GetFullPath($env:GENARRATIVE_API_SERVER_EXE_TARGET)',
    '$processes = Get-Process -Name api-server -ErrorAction SilentlyContinue | Where-Object {',
    '  $_.Path -and ([System.IO.Path]::GetFullPath($_.Path) -ieq $target)',
    '}',
    'foreach ($process in $processes) {',
    '  try {',
    '    Stop-Process -Id $process.Id -Force -ErrorAction Stop',
    '    Wait-Process -Id $process.Id -Timeout 5 -ErrorAction SilentlyContinue',
    '    Write-Output $process.Id',
    '  } catch {',
    '    Write-Error "[api-server] 忽略旧进程清理瞬时失败 pid=$($process.Id): $($_.Exception.Message)"',
    '  }',
    '}',
    'exit 0',
  ].join('\n');

  const output = execFileSync(
    'powershell.exe',
    ['-NoProfile', '-ExecutionPolicy', 'Bypass', '-Command', command],
    {
      encoding: 'utf8',
      env: {
        ...process.env,
        GENARRATIVE_API_SERVER_EXE_TARGET: apiServerExePath,
      },
    },
  ).trim();

  if (output) {
    console.log(`[api-server] 已停止旧 api-server 进程: ${output}`);
  }
}

try {
  stopExistingWindowsApiServer();
} catch (error) {
  console.error(
    `[api-server] 清理旧 api-server 进程失败: ${error.message}`,
  );
  process.exit(1);
}

console.log(
  `[api-server] SpacetimeDB ${mergedEnv.GENARRATIVE_SPACETIME_DATABASE} @ ${mergedEnv.GENARRATIVE_SPACETIME_SERVER_URL}`,
);

const child = spawn(
  'cargo',
  ['run', '-p', 'api-server', '--manifest-path', 'server-rs/Cargo.toml'],
  {
    cwd: repoRoot,
    env: mergedEnv,
    stdio: 'inherit',
  },
);

child.on('error', (error) => {
  console.error(`[api-server] 启动 cargo 失败: ${error.message}`);
  process.exit(1);
});

child.on('exit', (code, signal) => {
  if (signal) {
    console.error(`[api-server] api-server 被信号终止: ${signal}`);
    process.exit(1);
  }

  process.exit(code ?? 0);
});