require('dotenv').config();
const express = require('express');
const session = require('express-session');
const passport = require('passport');
const bodyParser = require('body-parser');
const path = require('path');
const flash = require('connect-flash');
const crypto = require('crypto');
const fs = require('fs').promises;
const cron = require('node-cron');
const chalk = require('chalk');

// Import des services et configurations
const { logger, logRequestInfo, ErrorLogger } = require('./config/logs');
const { version } = require('./package.json');
const routes = require('./routes/routes.js');
const fileCleanup = require('./services/fileCleanupService');
const reportManager = require('./services/reportService.js');

// Configuration de l'application
const app = express();
const PORT = process.env.PORT || 5053;

// Import des modèles requis
require('./models/fileCreated.js');

// Lecture du fichier de configuration
const loadSetup = async () => {
  try {
    const setupPath = path.join(__dirname, 'data', 'setup.json');
    const setupData = await fs.readFile(setupPath, 'utf8');
    return JSON.parse(setupData);
  } catch (err) {
    logger.error('Error reading setup.json:', err);
    return {};
  }
};

// Configuration de l'application
const configureApp = async () => {
  const setup = await loadSetup();

  // Configuration des stratégies d'authentification
  if (setup.discord) require('./models/Passport-Discord.js');
  if (setup.ldap) require('./models/Passport-ActiveDirectory.js');

  // Middleware de base
  app.set('trust proxy', 1);
  app.set('view engine', 'ejs');
  app.set('views', path.join(__dirname, 'views'));

  // Gestionnaire de favicon.ico
  app.get('/favicon.ico', (req, res) => {
    res.status(204).end();
  });

  // Protection des fichiers sensibles
  app.get(['/data/user.json', '/data/file_info.json', '/data/setup.json'], 
    (req, res) => res.status(403).json({ error: 'Access Denied' }));

  // Configuration des middlewares
  app.use(express.static(path.join(__dirname, 'public')));
  app.use('/public', express.static(path.join(__dirname, 'public'))); 
  app.use(express.urlencoded({ extended: true }));
  app.use(bodyParser.json());
  app.use(session({
    secret: crypto.randomBytes(64).toString('hex'),
    resave: false,
    saveUninitialized: true,
    cookie: { 
      secure: process.env.NODE_ENV === 'production',
      maxAge: 24 * 60 * 60 * 1000
    }
  }));
  app.use(passport.initialize());
  app.use(passport.session());
  app.use(flash());
  app.use(logRequestInfo);
  app.use(routes);

  app.use((req, res, next) => {
    if (req.accepts('html')) {
      res.status(404).render('unauthorized', { url: req.url });
    } else {
      // Pour les requêtes API ou autres
      res.status(404).json({ error: 'Not Found' });
    }
  });

  app.use((err, req, res, next) => {
    ErrorLogger.error('Unhandled error:', err);
       
    res.status(500).json(response);
  });
};

process.removeAllListeners('warning');
process.on('warning', (warning) => {
  if (warning.name === 'DeprecationWarning' && warning.message.includes('punycode')) {
    return;
  }
  console.warn(warning.name, warning.message);
});

// Configuration des tâches planifiées
const configureCronJobs = () => {

  // Service de nettoyage des fichiers
  fileCleanup.start();

  // Service de rreport système
  reportManager.start();
};

// Utilitaires pour la vérification des fichiers
const fileUtils = {
  async fileExists(filePath) {
    try {
      await fs.access(filePath);
      return true;
    } catch {
      return false;
    }
  }
};

// Démarrage du serveur
const startServer = () => {
  const server = app.listen(PORT, () => {
    server.timeout = 300000;
    console.clear()
    
    if (logger) {
      logger.info('☀️  Welcome to the Content Delivery Network Server');
      logger.info(`🚀 Server running on port ${PORT}`);
      logger.info(`⚜️  Application developed by Dinawo, part of the Myaxrin Labs group`);
      logger.info(`♨️  Version: ${version}`);
    } else {
      console.error('🔴 Logger is not initialized');
    }
  });

  return server;
};

// Gestion des erreurs globales
const configureErrorHandling = () => {
  process.on('uncaughtException', (err) => {
    ErrorLogger.error('Uncaught Exception:', err);
  });

  process.on('unhandledRejection', (reason, promise) => {
    ErrorLogger.error('Unhandled Rejection at:', promise, 'reason:', reason);
  });
};

// Initialisation de l'application
const initializeApp = async () => {
  try {
    configureErrorHandling();
    await configureApp();
    configureCronJobs();
    const server = startServer();

    return server;
  } catch (err) {
    logger.error('Failed to initialize application:', err);
    process.exit(1);
  }
};

// Démarrage de l'application
initializeApp();

// Export pour les tests
module.exports = { app, fileUtils };