// server/InfoServer.js
'use strict';

const express            = require('express');
const https              = require('https');
const path               = require('path');
const robotConfigService = require('./RobotConfigService');

const PUBLIC_DIR = path.join(__dirname, '..', 'public');

function createInfoServer(httpsOptions, sharedState, robot, GCode, senders, options = {}) {
  const app = express();

  // ── Statische Dateien ────────────────────────────────────────────────────
  const staticFile = (file) => (req, res) =>
    res.sendFile(path.join(PUBLIC_DIR, file), err => {
      if (err) res.status(404).end('Not found');
    });

  app.get('/',           staticFile('index.html'));
  app.get('/app.js',     staticFile('app.js'));
  app.get('/style.css',  staticFile('style.css'));
  app.get('/allApps.css', staticFile('allApps.css'));

  // ── API ──────────────────────────────────────────────────────────────────
  app.get('/api/status', (req, res) => {
    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 connectedSenders = sendersStatus.filter(s => s.health === 'ok').length;
    res.json({
      generatedAt: new Date().toISOString(),
      health: {
        ok:               sendersStatus.length > 0 && sendersStatus.every(s => s.health === 'ok'),
        connectedSenders,
        totalSenders:     sendersStatus.length
      },
      clients:      sharedState.connectedClients,
      senders:      sendersStatus,
      lastCommands: sharedState.lastCommands,
      lastPings:    sharedState.lastPings
    });
  });

  app.get('/api/position', (req, res) => {
    res.json(JSON.parse(GCode.getM114(robot)));
  });

  // ── Robot-Config-Service ─────────────────────────────────────────────────
  robotConfigService.register(app, { apiKey: options.apiKey });

  // ── 404 ──────────────────────────────────────────────────────────────────
  app.use((req, res) => res.status(404).end('Not found'));

  return https.createServer(httpsOptions, app);
}

module.exports = createInfoServer;