import { useEffect, useState } from 'react'
import { formatAuthError } from '../lib/authError'
import { getAuthSession, logout, type AuthSession } from '../services/api/auth'

const signedOutSession: AuthSession = {
  authentication_required: true,
  authenticated: false,
  username: null,
  expires_at: null,
  role: null,
  guest_access_enabled: false,
  guest_project_id: null,
}

export function useOperatorSession() {
  const [session, setSession] = useState<AuthSession | null>(null)
  const [sessionError, setSessionError] = useState<string | null>(null)
  const [loggingOut, setLoggingOut] = useState(false)

  useEffect(() => {
    let active = true
    getAuthSession()
      .then((value) => {
        if (active) {
          setSession(value)
          setSessionError(null)
        }
      })
      .catch((error) => {
        if (active) {
          setSession(signedOutSession)
          setSessionError(formatAuthError(error, 'De aanmeldservice is tijdelijk niet bereikbaar. Probeer het over enkele ogenblikken opnieuw.'))
        }
      })
    return () => {
      active = false
    }
  }, [])

  useEffect(() => {
    const expireSession = () => {
      setSession((current) => ({
        ...signedOutSession,
        guest_access_enabled: current?.guest_access_enabled ?? false,
      }))
      setSessionError('Uw sessie is verlopen. Meld u opnieuw aan.')
    }
    window.addEventListener('geointel:session-expired', expireSession)
    return () => window.removeEventListener('geointel:session-expired', expireSession)
  }, [])

  const handleLogout = async () => {
    setLoggingOut(true)
    try {
      setSession(await logout())
      setSessionError(null)
    } catch (error) {
      setSessionError(formatAuthError(error, 'Uitloggen is niet gelukt. Vernieuw de pagina en probeer opnieuw.'))
    } finally {
      setLoggingOut(false)
    }
  }

  const handleAuthenticated = (authenticatedSession: AuthSession) => {
    setSession(authenticatedSession)
    setSessionError(null)
  }

  return { session, sessionError, loggingOut, handleAuthenticated, handleLogout }
}