import dotenv from 'dotenv'

// Cargar variables de entorno
dotenv.config()

// Configuración de variables de entorno
export const config = {
  // NextAuth
  nextAuth: {
    url: process.env.NEXTAUTH_URL || 'http://localhost:3000',
    secret: process.env.NEXTAUTH_SECRET || 'tu-clave-secreta-por-defecto-cambiar-en-produccion',
  },
  
  // Database
  database: {
    url: process.env.DATABASE_URL || 'file:./dev.db',
  },
  
  // OpenRouter
  openRouter: {
    apiKey: process.env.OPENROUTER_API_KEY || '',
    url: process.env.OPENROUTER_URL || 'https://openrouter.ai/api/v1',
    model: process.env.OPENROUTER_MODEL || 'deepseek/deepseek-chat-v3-0324:free',
  },
  
  // Session Configuration
  session: {
    maxAge: parseInt(process.env.SESSION_MAX_AGE || '4') * 60 * 60, // Convert hours to seconds
    jwtMaxAge: parseInt(process.env.JWT_MAX_AGE || '4') * 60 * 60, // Convert hours to seconds
  },
  
  // UTB API
  utbApi: {
    url: process.env.UTB_API_URL || 'https://sai.utb.edu.ec/v2/ws/auth/login',
    appId: process.env.UTB_API_APP_ID || '',
    appToken: process.env.UTB_API_APP_TOKEN || '',
  },

  // Jitsi Meet
  jitsi: {
    domain: process.env.JITSI_DOMAIN || '',
    appId: process.env.JITSI_APP_ID || '',
    appSecret: process.env.JITSI_APP_SECRET || '',
    useJWT: process.env.JITSI_USE_JWT === 'true',
  },

  // Environment
  env: process.env.NODE_ENV || 'development',
  port: process.env.PORT || '3000',
} as const

// Logger para verificar variables de entorno
export function logEnvironmentConfig() {
  console.log('🔧 Configuración de Variables de Entorno:')
  console.log('==========================================')
  
  // NextAuth
  console.log('📋 NextAuth:')
  console.log(`   URL: ${config.nextAuth.url}`)
  console.log(`   Secret: ${config.nextAuth.secret ? '✅ Configurado' : '❌ No configurado'}`)
  
  // Database
  console.log('🗄️ Database:')
  console.log(`   URL: ${config.database.url}`)
  
  // OpenRouter
  console.log('🤖 OpenRouter:')
  console.log(`   API Key: ${config.openRouter.apiKey ? '✅ Configurada' : '❌ No configurada'}`)
  console.log(`   URL: ${config.openRouter.url}`)
  console.log(`   Model: ${config.openRouter.model}`)
  
  // Session
  console.log('🔐 Session:')
  console.log(`   Max Age: ${config.session.maxAge / 3600} horas (${config.session.maxAge} segundos)`)
  console.log(`   JWT Max Age: ${config.session.jwtMaxAge / 3600} horas (${config.session.jwtMaxAge} segundos)`)
  
  // UTB API
  console.log('🎓 UTB API:')
  console.log(`   URL: ${config.utbApi.url}`)
  console.log(`   App ID: ${config.utbApi.appId ? '✅ Configurado' : '❌ No configurado'}`)
  console.log(`   App Token: ${config.utbApi.appToken ? '✅ Configurado' : '❌ No configurado'}`)

  // Jitsi Meet
  console.log('🎥 Jitsi Meet:')
  console.log(`   Domain: ${config.jitsi.domain}`)
  console.log(`   App ID: ${config.jitsi.appId ? '✅ Configurado' : '❌ No configurado'}`)
  console.log(`   App Secret: ${config.jitsi.appSecret ? '✅ Configurado' : '❌ No configurado'}`)
  console.log(`   Use JWT: ${config.jitsi.useJWT ? '✅ Habilitado' : '❌ Deshabilitado'}`)

  // Environment
  console.log('🌍 Environment:')
  console.log(`   NODE_ENV: ${config.env}`)
  console.log(`   PORT: ${config.port}`)

  console.log('==========================================')
  
  // Advertencias
  if (!config.nextAuth.secret || config.nextAuth.secret === 'tu-clave-secreta-por-defecto-cambiar-en-produccion') {
    console.log('⚠️ ADVERTENCIA: NEXTAUTH_SECRET no está configurado correctamente')
  }
  
  if (!config.openRouter.apiKey) {
    console.log('⚠️ ADVERTENCIA: OPENROUTER_API_KEY no está configurada - El chat funcionará con respuestas de fallback')
  }
  
  if (!config.utbApi.appId || !config.utbApi.appToken) {
    console.log('⚠️ ADVERTENCIA: UTB API credentials no están configuradas')
  }

  if (config.jitsi.useJWT && (!config.jitsi.appId || !config.jitsi.appSecret)) {
    console.log('⚠️ ADVERTENCIA: Jitsi JWT está habilitado pero las credenciales no están configuradas')
  }

  console.log('')
}

// Función para validar configuración crítica
export function validateConfig() {
  const errors: string[] = []
  
  if (!config.nextAuth.secret || config.nextAuth.secret === 'tu-clave-secreta-por-defecto-cambiar-en-produccion') {
    errors.push('NEXTAUTH_SECRET no está configurado correctamente')
  }
  
  if (!config.database.url) {
    errors.push('DATABASE_URL no está configurado')
  }
  
  return {
    isValid: errors.length === 0,
    errors
  }
}