#!/usr/bin/env node
/**
 * ═══════════════════════════════════════════════════════════
 * 🏛️ 铸渊主权服务器 · Zhuyuan Sovereign Server
 * ═══════════════════════════════════════════════════════════
 *
 * 编号: ZY-SVR-002
 * 端口: 3800
 * 守护: 铸渊 · ICE-GL-ZY001
 * 版权: 国作登字-2026-A-00037559
 *
 * 新增GitHub/Notion OAuth API
 */

'use strict';

const express = require('express');
const cors = require('cors');
const fs = require('fs');
const path = require('path');
const os = require('os');
const https = require('https');
const { execSync } = require('child_process');
const emailAuth = require('./modules/email-auth');
const oauth = require('./modules/oauth-providers');
const agentHandshake = require('./modules/agent-handshake');

// ─── 常量 ───
const PORT = process.env.PORT || 3800;
const IS_DEV = process.env.NODE_ENV !== 'production';
const ZY_BASE_URL = process.env.ZY_BASE_URL || `http://localhost:${PORT}`;

// ─── Express 应用 ───
const app = express();
app.use(cors({
  origin: IS_DEV ? '*' : ZY_BASE_URL,
  credentials: true
}));
app.use(express.json());
app.use(express.urlencoded({ extended: true }));

// ─── 健康检查 ───
app.get('/api/health', (req, res) => {
  res.json({
    status: 'healthy',
    version: '1.0.0',
    server: os.hostname(),
    timestamp: new Date().toISOString()
  });
});

// ─── GitHub OAuth API ───
app.get('/api/oauth/github', async (req, res) => {
  try {
    const email = req.query.email;
    if (!email) return res.status(400).json({ error: true, message: '缺少邮箱参数' });
    
    const url = await oauth.getGitHubOAuthUrl(email);
    res.json({ success: true, url });
  } catch (err) {
    res.status(403).json({ error: true, message: err.message });
  }
});

app.get('/api/oauth/github/callback', async (req, res) => {
  try {
    const { code, state } = req.query;
    if (!code || !state) return res.redirect(`${ZY_BASE_URL}/?error=invalid_params`);
    
    const token = await oauth.handleGitHubCallback(code, state);
    res.redirect(`${ZY_BASE_URL}/?token=${token.token}`);
  } catch (err) {
    res.redirect(`${ZY_BASE_URL}/?error=${encodeURIComponent(err.message)}`);
  }
});

// ─── Notion OAuth API ───
app.get('/api/oauth/notion', async (req, res) => {
  try {
    const email = req.query.email;
    if (!email) return res.status(400).json({ error: true, message: '缺少邮箱参数' });
    
    const url = await oauth.getNotionOAuthUrl(email);
    res.json({ success: true, url });
  } catch (err) {
    res.status(403).json({ error: true, message: err.message });
  }
});

app.get('/api/oauth/notion/callback', async (req, res) => {
  try {
    const { code, state } = req.query;
    if (!code || !state) return res.redirect(`${ZY_BASE_URL}/?error=invalid_params`);
    
    const token = await oauth.handleNotionCallback(code, state);
    res.redirect(`${ZY_BASE_URL}/?token=${token.token}`);
  } catch (err) {
    res.redirect(`${ZY_BASE_URL}/?error=${encodeURIComponent(err.message)}`);
  }
});

// ─── Agent握手协议API ───
app.post('/api/agent/handshake/initiate', async (req, res) => {
  try {
    const { initiatorId, targetId, token } = req.body;
    if (!initiatorId || !targetId || !token) {
      return res.status(400).json({ error: true, message: '缺少必要参数' });
    }

    const result = agentHandshake.initiateHandshake(initiatorId, targetId, token);
    res.json({ success: true, ...result });
  } catch (err) {
    res.status(403).json({ error: true, message: err.message });
  }
});

app.post('/api/agent/handshake/complete', async (req, res) => {
  try {
    const { handshakeId, targetId, targetKey, token } = req.body;
    if (!handshakeId || !targetId || !targetKey || !token) {
      return res.status(400).json({ error: true, message: '缺少必要参数' });
    }

    const result = agentHandshake.completeHandshake(handshakeId, targetId, targetKey, token);
    res.json({ success: true, ...result });
  } catch (err) {
    res.status(403).json({ error: true, message: err.message });
  }
});

app.post('/api/agent/handshake/heartbeat', async (req, res) => {
  try {
    const { connectionId, token } = req.body;
    if (!connectionId || !token) {
      return res.status(400).json({ error: true, message: '缺少必要参数' });
    }

    const result = agentHandshake.heartbeat(connectionId, token);
    res.json({ success: true, ...result });
  } catch (err) {
    res.status(403).json({ error: true, message: err.message });
  }
});

app.post('/api/agent/handshake/disconnect', async (req, res) => {
  try {
    const { connectionId, token } = req.body;
    if (!connectionId || !token) {
      return res.status(400).json({ error: true, message: '缺少必要参数' });
    }

    const result = agentHandshake.disconnect(connectionId, token);
    res.json({ success: true, ...result });
  } catch (err) {
    res.status(403).json({ error: true, message: err.message });
  }
});

// 启动服务器
app.listen(PORT, () => {
  console.log(`铸渊主权服务器运行中 · 端口 ${PORT} · ${new Date().toISOString()}`);
});