// Trip authentication token management

const TOKEN_STORAGE_PREFIX = 'juntete_trip_token_'

export function storeTripToken(tripId: number, token: string): void {
  if (typeof window === 'undefined') {
    console.warn('[storeTripToken] Cannot store token - window is undefined')
    return
  }
  const key = `${TOKEN_STORAGE_PREFIX}${tripId}`
  localStorage.setItem(key, token)
  console.log(`[storeTripToken] Stored token for trip ${tripId} in key: ${key}`)
  // Verify it was stored
  const stored = localStorage.getItem(key)
  if (stored !== token) {
    console.error(`[storeTripToken] Token storage verification failed for trip ${tripId}`)
  } else {
    console.log(`[storeTripToken] Token storage verified for trip ${tripId}`)
  }
}

export function getTripToken(tripId: number): string | null {
  if (typeof window === 'undefined') {
    console.warn('[getTripToken] Cannot get token - window is undefined')
    return null
  }
  const key = `${TOKEN_STORAGE_PREFIX}${tripId}`
  const token = localStorage.getItem(key)
  console.log(`[getTripToken] Trip ${tripId}, key: ${key}, token:`, token ? 'found' : 'not found')
  return token
}

export function removeTripToken(tripId: number): void {
  if (typeof window === 'undefined') return
  localStorage.removeItem(`${TOKEN_STORAGE_PREFIX}${tripId}`)
}

export function getAuthHeaders(tripId: number): HeadersInit {
  const token = getTripToken(tripId)
  console.log(`[getAuthHeaders] Trip ${tripId}, token:`, token ? 'present' : 'missing')
  
  const headers: HeadersInit = {
    'Content-Type': 'application/json',
  }
  
  if (token) {
    headers['Authorization'] = `Bearer ${token}`
    console.log(`[getAuthHeaders] Added Authorization header for trip ${tripId}`)
  } else {
    console.warn(`[getAuthHeaders] No token found for trip ${tripId}`)
  }
  
  return headers
}

export async function authenticateTrip(tripId: number, password: string): Promise<string> {
  const response = await fetch('/api/auth/trip/authenticate', {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      trip_id: tripId,
      password: password,
    }),
  })

  if (!response.ok) {
    const errorData = await response.json()
    throw new Error(errorData.detail || 'Authentication failed')
  }

  const data = await response.json()
  storeTripToken(tripId, data.access_token)
  return data.access_token
}