import sha256 from 'crypto-js/sha256'
import siteConfig from '../config/site.json'

// Hash password token with SHA256
function encryptToken(token: string): string {
  return sha256(token).toString()
}

// Fetch stored token from localStorage and encrypt with SHA256
export function getStoredToken(path: string): string | null {
  const storedToken =
    typeof window !== 'undefined' ? JSON.parse(localStorage.getItem(matchProtectedRoute(path)) as string) : ''
  return storedToken ? encryptToken(storedToken) : null
}

/**
 * Compares the hash of .password and od-protected-token header
 * @param odTokenHeader od-protected-token header (sha256 hashed token)
 * @param dotPassword non-hashed .password file
 * @returns whether the two hashes are the same
 */
export function compareHashedToken({
  odTokenHeader,
  dotPassword,
}: {
  odTokenHeader: string
  dotPassword: string
}): boolean {
  return encryptToken(dotPassword.trim()) === odTokenHeader
}
/**
 * Match the specified route against a list of predefined routes
 * @param route directory path
 * @returns whether the directory is protected
 */

export function matchProtectedRoute(route: string): string {
  const protectedRoutes: string[] = siteConfig.protectedRoutes
  let authTokenPath = ''

  for (const r of protectedRoutes) {
    // protected route array could be empty
    if (r) {
      if (
        route.startsWith(
          r
            .split('/')
            .map(p => encodeURIComponent(p))
            .join('/')
        )
      ) {
        authTokenPath = r
        break
      }
    }
  }
  return authTokenPath
}