import camelize from 'camelize'

import firebase from 'firebase'

import globalConfig from '../config'

import { redirectTo } from './navigation'

export const CURRENT_USER = 'linksf::currentUser'

export const authenticate = () => {

const user = currentUser()

if (!user) {

redirectTo('/login')

return false

}

return user

}

export const currentUser = () => {

const sessionData = sessionStorage[CURRENT_USER]

let user = null

try {

user = sessionData && JSON.parse(sessionData)

} catch (e) {

console.warn('Failed to load current user', e)

}

return user

}

export const setCurrentUser = (user) => {

try {

sessionStorage[CURRENT_USER] = JSON.stringify(user)

} catch (e) {

console.warn('Failed to set current user', e)

return false

}

}

export const destroySession = () => {

delete sessionStorage[CURRENT_USER]

}

export const login = (email, password, loginSuccessCallback, loginFailureCallback) => {

const firebase = firebaseClient()

firebase

.auth()

.onAuthStateChanged((user) => {

if (user) {

const userData = camelize({

name: user.displayName,

email: user.email,

photo: user.photoUrl,

})

user.getToken().then((token) => {

userData.token = token

setCurrentUser(userData)

})

}

})

firebase

.auth()

.signInWithEmailAndPassword(email, password)

.then(loginSuccessCallback)

.catch((error) => {

loginFailureCallback(error.message)

})

}

function firebaseClient() {

if (firebase.apps.length == 1) {

return firebase // Don't initialize more than one client

}

const config = {

apiKey: globalConfig.firebaseApiKey,

authDomain: globalConfig.firebaseAuthDomain,

}

firebase.initializeApp(config)

return firebase

}