// server/InfoServer.js
const fs = require('fs');
const https = require('https');

function createInfoServer(httpsOptions, sharedState, robot, GCode, senders) {
  return https.createServer(httpsOptions, (req, res) => {

    if (req.url === '/') {
      return serveFile(res, './public/index.html', 'text/html');
    }

    if (req.url === '/app.js') {
      return serveFile(res, './public/app.js', 'application/javascript');
    }

    if (req.url === '/style.css') {
      return serveFile(res, './public/style.css', 'text/css');
    }

    if (req.url === '/allApps.css') {
      return serveFile(res, './public/allApps.css', 'text/css');
    }

    /* ---------- API ---------- */
    if (req.url === '/api/status') {
      const sendersStatus = senders.map(({ name, instance }) => {
        const status = instance?.getStatus ? instance.getStatus() : {
          state: instance?.isTestMode ? 'connected' : instance?.tSocket ? 'connected' : 'disconnected',
          url: instance?.url || null,
          error: instance?.error || null,
          isTestMode: !!instance?.isTestMode,
          reconnectAttempt: instance?.reconnectAttempt || 0,
          reconnectTimer: !!instance?.reconnectTimer
        };

        const state = status.state || (instance?.tSocket ? 'connected' : 'disconnected');
        const health = state === 'connected'
          ? 'ok'
          : state === 'reconnecting'
            ? 'warning'
            : 'disconnected';
        const reason = state === 'disconnected'
          ? status.error || 'no active socket connection'
          : undefined;

        return {
          name,
          state,
          url: status.url || null,
          isTestMode: !!status.isTestMode,
          error: status.error || null,
          reconnectAttempt: status.reconnectAttempt || 0,
          reconnectTimer: !!status.reconnectTimer,
          health,
          reason
        };
      });

      const status = {
        clients: sharedState.connectedClients,
        senders: sendersStatus,
        lastCommands: sharedState.lastCommands,
        lastPings: sharedState.lastPings
      };

      res.writeHead(200, {'Content-Type': 'application/json'});
      return res.end(JSON.stringify(status));
    }

    if (req.url === '/api/position') {
      res.writeHead(200, {'Content-Type': 'application/json'});
      return res.end(GCode.getM114(robot));
    }

    res.writeHead(404);
    res.end('Not found');
  });
}

/* ---------- Helper ---------- */

function serveFile(res, path, type) {
  fs.readFile(path, (err, data) => {
    if (err) {
      res.writeHead(404);
      return res.end('Not found');
    }
    res.writeHead(200, {'Content-Type': type});
    res.end(data);
  });
}

module.exports = createInfoServer;