import { SystemSettings, ISystemSettings } from '@/models/system-settings'
import { connectDB } from '@/lib/mongodb'

// Cache for system settings to avoid database calls on every request
let settingsCache: any = null
let cacheTimestamp = 0
const CACHE_DURATION = 60000 // 1 minute cache

async function getSettingsFromDB() {
  await connectDB()
  let settings = await (SystemSettings as any).findOne({})

  if (!settings) {
    // Create default settings if none exist
    settings = new SystemSettings({
      maintenanceMode: false,
      registrationEnabled: true,
      emailVerificationRequired: true,
      maxUserBalance: 1000000,
      defaultUserRole: 'user',
      systemMessage: '',
      paymentGatewayEnabled: true,
      developerHireEnabled: true,
      vpsDeploymentEnabled: true,
      kubernetesDeploymentEnabled: true,
      vpnServiceEnabled: true,
      lastUpdated: new Date(),
      updatedBy: 'System',
    })
    await settings.save()
  }

  return settings
}

export async function getSystemSettings() {
  const now = Date.now()

  // Return cached settings if still valid
  if (settingsCache && now - cacheTimestamp < CACHE_DURATION) {
    return settingsCache
  }

  // Fetch fresh settings from database
  const settings = await getSettingsFromDB()
  settingsCache = settings.toObject()
  cacheTimestamp = now

  return settingsCache
}

export async function updateSystemSettings(newSettings: any) {
  await connectDB()

  const settings = await (SystemSettings as any).findOneAndUpdate(
    {},
    { ...newSettings, lastUpdated: new Date() },
    { new: true, upsert: true }
  )

  // Clear cache to force refresh
  settingsCache = null
  cacheTimestamp = 0

  return settings
}

export async function checkServiceAvailability(
  service: 'vps' | 'developer' | 'kubernetes' | 'vpn'
): Promise<boolean> {
  const serviceMap = {
    vps: 'vpsDeploymentEnabled',
    developer: 'developerHireEnabled',
    kubernetes: 'kubernetesDeploymentEnabled',
    vpn: 'vpnServiceEnabled',
  }

  const settings = await getSystemSettings()
  const settingKey = serviceMap[service]
  return settings[settingKey] as boolean
}