import express from 'express';
import basicAuth from 'express-basic-auth';
import logger from './logger.js';

class APIServer {
  constructor(config, modem, smsProcessor) {
    this.config = config;
    this.modem = modem;
    this.smsProcessor = smsProcessor;
    this.app = express();

    this.setupMiddleware();
    this.setupRoutes();
  }

  setupMiddleware() {
    // JSON解析
    this.app.use(express.json());

    // HTTP Basic认证
    const users = {};
    users[this.config.api.auth.username] = this.config.api.auth.password;

    this.app.use(basicAuth({
      users,
      challenge: true,
      realm: 'SMS Gateway'
    }));

    // 请求日志
    this.app.use((req, res, next) => {
      logger.info(`${req.method} ${req.path}`);
      next();
    });
  }

  setupRoutes() {
    // 状态查询
    this.app.get('/api/status', async (req, res) => {
      try {
        const signal = await this.modem.getSignalQuality();
        const operator = await this.modem.getOperator();

        res.json({
          success: true,
          data: {
            ready: this.modem.ready,
            model: this.modem.modelInfo,
            signal,
            operator,
            uptime: process.uptime()
          }
        });
      } catch (err) {
        logger.error('查询状态失败:', err);
        res.status(500).json({
          success: false,
          error: err.message
        });
      }
    });

    // 发送短信
    this.app.post('/api/sms/send', async (req, res) => {
      try {
        const { phone, message } = req.body;

        if (!phone || !message) {
          return res.status(400).json({
            success: false,
            error: '缺少必要参数: phone, message'
          });
        }

        const success = await this.modem.sendSMS(phone, message);

        res.json({
          success,
          message: success ? '短信发送成功' : '短信发送失败'
        });
      } catch (err) {
        logger.error('发送短信失败:', err);
        res.status(500).json({
          success: false,
          error: err.message
        });
      }
    });

    // 查询信号强度
    this.app.get('/api/modem/signal', async (req, res) => {
      try {
        const signal = await this.modem.getSignalQuality();
        res.json({
          success: true,
          data: signal
        });
      } catch (err) {
        logger.error('查询信号失败:', err);
        res.status(500).json({
          success: false,
          error: err.message
        });
      }
    });

    // 查询模组信息
    this.app.get('/api/modem/info', async (req, res) => {
      try {
        const iccid = await this.modem.getICCID();
        res.json({
          success: true,
          data: {
            model: this.modem.modelInfo,
            iccid,
            ready: this.modem.ready
          }
        });
      } catch (err) {
        logger.error('查询模组信息失败:', err);
        res.status(500).json({
          success: false,
          error: err.message
        });
      }
    });

    // 发送AT命令
    this.app.post('/api/modem/at', async (req, res) => {
      try {
        const { command } = req.body;

        if (!command) {
          return res.status(400).json({
            success: false,
            error: '缺少必要参数: command'
          });
        }

        const response = await this.modem.sendATCommand(command, 5000);

        res.json({
          success: true,
          data: {
            command,
            response
          }
        });
      } catch (err) {
        logger.error('发送AT命令失败:', err);
        res.status(500).json({
          success: false,
          error: err.message
        });
      }
    });

    // 获取日志
    this.app.get('/api/logs', (req, res) => {
      try {
        const logs = logger.getBuffer().getAll();
        res.json({
          success: true,
          data: logs
        });
      } catch (err) {
        logger.error('获取日志失败:', err);
        res.status(500).json({
          success: false,
          error: err.message
        });
      }
    });

    // 健康检查
    this.app.get('/health', (req, res) => {
      res.json({
        status: 'ok',
        uptime: process.uptime()
      });
    });

    // 404处理
    this.app.use((req, res) => {
      res.status(404).json({
        success: false,
        error: 'Not Found'
      });
    });

    // 错误处理
    this.app.use((err, req, res, next) => {
      logger.error('API错误:', err);
      res.status(500).json({
        success: false,
        error: err.message
      });
    });
  }

  start() {
    const port = this.config.api.port;
    this.app.listen(port, () => {
      logger.info(`API服务器已启动，监听端口: ${port}`);
    });
  }
}

export default APIServer;