#!/usr/bin/env node

const path = require('path');
const { spawn } = require('child_process');
const { applyWorkspaceContext, workspaceIdentity } = require('../mcp/src/core/runtime-context');
const { buildStartupSummary } = require('../mcp/src/core/startup-summary');
const { ensureRelayDaemon } = require('../mcp/src/core/relay-daemon');

function parseArgs(argv = process.argv.slice(2)) {
  const portIndex = argv.indexOf('--port');
  const port = portIndex >= 0 ? Number(argv[portIndex + 1]) : Number(process.env.QIWEI_DASHBOARD_PORT || 4320);
  if (!Number.isInteger(port) || port < 1 || port > 65535) throw new Error('端口无效，请使用 --port 4320 这类有效端口');
  return { port, openBrowser: !argv.includes('--no-open') };
}

async function requestJson(url, timeoutMs = 15000) {
  const response = await fetch(url, { signal: AbortSignal.timeout(timeoutMs) });
  if (!response.ok) throw new Error(`HTTP ${response.status}`);
  return response.json();
}

async function inspectRunningServer(baseUrl, expectedWorkspaceId) {
  try {
    const health = await requestJson(`${baseUrl}/api/health`, 2500);
    const actualWorkspaceId = health.data?.workspaceId || '';
    if (actualWorkspaceId && actualWorkspaceId !== expectedWorkspaceId) {
      return { running: false, occupied: true, actualWorkspaceId };
    }
    return { running: health.status === 'ok', occupied: false, health };
  } catch {
    return { running: false, occupied: false };
  }
}

function openUrl(url) {
  let command;
  let args;
  if (process.platform === 'win32') {
    command = 'cmd.exe';
    args = ['/d', '/s', '/c', 'start', '', url];
  } else if (process.platform === 'darwin') {
    command = 'open';
    args = [url];
  } else {
    command = 'xdg-open';
    args = [url];
  }
  const child = spawn(command, args, { detached: true, stdio: 'ignore', windowsHide: true });
  child.unref();
}

function printStartupSummary(baseUrl, summary, workspaceRoot, alreadyRunning) {
  process.stdout.write([
    '',
    `企微工作台${alreadyRunning ? '已在运行' : '启动成功'}：${baseUrl}/#agent`,
    `项目目录：${workspaceRoot}`,
    `产品模式：${summary.product?.label || '个人版'} · ${summary.product?.collectionLabel || '本地主动监听'}`,
    '',
    '启动检查：',
    ...summary.checks.map(item => `  ${item.ready ? '[完成]' : '[待处理]'} ${item.label}${item.ready ? '' : ` — ${item.action}`}`),
    '',
    `下一步：${summary.nextAction}`,
    '',
  ].join('\n'));
}

async function main() {
  const options = parseArgs();
  process.env.QIWEI_DASHBOARD_PORT = String(options.port);
  const context = applyWorkspaceContext({ packageRoot: path.resolve(__dirname, '..') });
  ensureRelayDaemon();
  const expectedWorkspaceId = workspaceIdentity(context.workspaceRoot);
  const baseUrl = `http://127.0.0.1:${options.port}`;
  const current = await inspectRunningServer(baseUrl, expectedWorkspaceId);
  if (current.occupied) {
    throw new Error(`端口 ${options.port} 正被另一个企微项目使用。请关闭旧工作台，或使用 npm run preview -- --port ${options.port + 1}`);
  }

  let server = null;
  if (!current.running) {
    const { startServer } = require('../mcp/src/dashboard/server');
    ({ server } = await startServer(options.port));
  }

  let status = {};
  let agent = {};
  try {
    [status, agent] = await Promise.all([
      requestJson(`${baseUrl}/api/status`),
      requestJson(`${baseUrl}/api/agent/status`),
    ]);
  } catch (error) {
    process.stderr.write(`工作台已启动，但启动状态读取失败：${error.message}\n`);
  }
  const summary = buildStartupSummary(status, agent);
  printStartupSummary(baseUrl, summary, context.workspaceRoot, current.running);
  if (options.openBrowser) openUrl(`${baseUrl}/#agent`);
  if (current.running && !server) return;

}

if (require.main === module) {
  main().catch(error => {
    process.stderr.write(`启动预览失败：${error.message}\n`);
    process.exit(1);
  });
}

module.exports = {
  parseArgs,
  inspectRunningServer,
};