import axios from 'axios'
import { Dispatch, Store } from 'redux'
import {
  AuthResponse,
  DeviceStorage,
  VerificationParams,
  UserAttributes,
  UserRegistrationDetails,
  UserSignInCredentials,
  UserSignOutCredentials,
  ActionsExport,
  REGISTRATION_REQUEST_SENT,
  REGISTRATION_REQUEST_SUCCEEDED,
  REGISTRATION_REQUEST_FAILED,
  REGISTRATION_UPDATE_REQUEST_SENT,
  REGISTRATION_UPDATE_REQUEST_SUCCEEDED,
  REGISTRATION_UPDATE_REQUEST_FAILED,
  VERIFY_TOKEN_REQUEST_SENT,
  VERIFY_TOKEN_REQUEST_SUCCEEDED,
  VERIFY_TOKEN_REQUEST_FAILED,
  SIGNIN_REQUEST_SENT,
  SIGNIN_REQUEST_SUCCEEDED,
  SIGNIN_REQUEST_FAILED,
  SIGNOUT_REQUEST_SENT,
  SIGNOUT_REQUEST_SUCCEEDED,
  SIGNOUT_REQUEST_FAILED,
  SET_HAS_VERIFICATION_BEEN_ATTEMPTED,
  RegistrationRequestSentAction,
  RegistrationRequestSucceededAction,
  RegistrationRequestFailedAction,
  RegistrationUpdateRequestSentAction,
  RegistrationUpdateRequestSucceededAction,
  RegistrationUpdateRequestFailedAction,
  VerifyTokenRequestSentAction,
  VerifyTokenRequestSucceededAction,
  VerifyTokenRequestFailedAction,
  SignInRequestSentAction,
  SignInRequestSucceededAction,
  SignInRequestFailedAction,
  SignOutRequestSentAction,
  SignOutRequestSucceededAction,
  SignOutRequestFailedAction,
  SetHasVerificationBeenAttemptedAction
} from './types'
import AsyncLocalStorage from './AsyncLocalStorage'
import {
  deleteAuthHeaders,
  deleteAuthHeadersFromDeviceStorage,
  getUserAttributesFromResponse,
  persistAuthHeadersInDeviceStorage,
  setAuthHeaders
} from './services/auth'

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Pure Redux actions:
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

export const registrationRequestSent = (): RegistrationRequestSentAction => ({
  type: REGISTRATION_REQUEST_SENT
})

export const registrationRequestSucceeded = (
  userAttributes: UserAttributes
): RegistrationRequestSucceededAction => ({
  type: REGISTRATION_REQUEST_SUCCEEDED,
  payload: {
    userAttributes
  }
})

export const registrationRequestFailed = (): RegistrationRequestFailedAction => ({
  type: REGISTRATION_REQUEST_FAILED
})

export const registrationUpdateRequestSent = (): RegistrationUpdateRequestSentAction => ({
  type: REGISTRATION_UPDATE_REQUEST_SENT
})

export const registrationUpdateRequestSucceeded = (
  userAttributes: UserAttributes
): RegistrationUpdateRequestSucceededAction => ({
  type: REGISTRATION_UPDATE_REQUEST_SUCCEEDED,
  payload: {
    userAttributes
  }
})

export const registrationUpdateRequestFailed = (): RegistrationUpdateRequestFailedAction => ({
  type: REGISTRATION_UPDATE_REQUEST_FAILED
})

export const verifyTokenRequestSent = (): VerifyTokenRequestSentAction => ({
  type: VERIFY_TOKEN_REQUEST_SENT
})

export const verifyTokenRequestSucceeded = (
  userAttributes: UserAttributes
): VerifyTokenRequestSucceededAction => ({
  type: VERIFY_TOKEN_REQUEST_SUCCEEDED,
  payload: {
    userAttributes
  }
})

export const verifyTokenRequestFailed = (): VerifyTokenRequestFailedAction => ({
  type: VERIFY_TOKEN_REQUEST_FAILED
})

export const signInRequestSent = (): SignInRequestSentAction => ({
  type: SIGNIN_REQUEST_SENT
})

export const signInRequestSucceeded = (
  userAttributes: UserAttributes
): SignInRequestSucceededAction => ({
  type: SIGNIN_REQUEST_SUCCEEDED,
  payload: {
    userAttributes
  }
})

export const signInRequestFailed = (): SignInRequestFailedAction => ({
  type: SIGNIN_REQUEST_FAILED
})

export const signOutRequestSent = (): SignOutRequestSentAction => ({
  type: SIGNOUT_REQUEST_SENT
})

export const signOutRequestSucceeded = (): SignOutRequestSucceededAction => ({
  type: SIGNOUT_REQUEST_SUCCEEDED
})

export const signOutRequestFailed = (): SignOutRequestFailedAction => ({
  type: SIGNOUT_REQUEST_FAILED
})

export const setHasVerificationBeenAttempted = (
  hasVerificationBeenAttempted: boolean
): SetHasVerificationBeenAttemptedAction => ({
  type: SET_HAS_VERIFICATION_BEEN_ATTEMPTED,
  payload: {
    hasVerificationBeenAttempted
  }
})

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Async Redux Thunk actions:
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

const generateAuthActions = (config: { [key: string]: any }): ActionsExport => {
  const {
    authUrl,
    storage,
    userAttributes,
    userRegistrationAttributes
  } = config

  const Storage: DeviceStorage = Boolean(storage.flushGetRequests)
    ? storage
    : AsyncLocalStorage

  const registerUser = (userRegistrationDetails: UserRegistrationDetails) =>
    async function(dispatch: Dispatch<{}>): Promise<void> {
      dispatch(registrationRequestSent())
      const { email, password, passwordConfirmation } = userRegistrationDetails
      const data = {
        email,
        password,
        password_confirmation: passwordConfirmation
      }
      Object.keys(userRegistrationAttributes).forEach((key: string) => {
        const backendKey = userRegistrationAttributes[key]
        data[backendKey] = userRegistrationDetails[key]
      })
      try {
        const response: AuthResponse = await axios({
          method: 'POST',
          url: authUrl,
          data
        })
        setAuthHeaders(Storage, response.headers)
        persistAuthHeadersInDeviceStorage(Storage, response.headers)
        const userAttributesToSave = getUserAttributesFromResponse(
          userAttributes,
          response
        )
        dispatch(registrationRequestSucceeded(userAttributesToSave))
      } catch (error) {
        dispatch(registrationRequestFailed())
        throw error
      }
    }

  const updateUser = (userRegistrationDetails: UserRegistrationDetails) =>
    async function(dispatch: Dispatch<{}>): Promise<void> {
      dispatch(registrationUpdateRequestSent())
      const { email, password, passwordConfirmation } = userRegistrationDetails
      const data = {
        email,
        password,
        password_confirmation: passwordConfirmation
      }
      Object.keys(userRegistrationAttributes).forEach((key: string) => {
        const backendKey = userRegistrationAttributes[key]
        data[backendKey] = userRegistrationDetails[key]
      })
      try {
        const response: AuthResponse = await axios({
          method: 'PUT',
          url: authUrl,
          data
        })
        setAuthHeaders(Storage, response.headers)
        persistAuthHeadersInDeviceStorage(Storage, response.headers)
        const userAttributesToSave = getUserAttributesFromResponse(
          userAttributes,
          response
        )
        dispatch(registrationUpdateRequestSucceeded(userAttributesToSave))
      } catch (error) {
        dispatch(registrationUpdateRequestFailed())
        throw error
      }
    }

  const verifyToken = (verificationParams: VerificationParams) =>
    async function(dispatch: Dispatch<{}>): Promise<void> {
      dispatch(verifyTokenRequestSent())
      try {
        const response = await axios({
          method: 'GET',
          url: `${authUrl}/validate_token`,
          params: verificationParams
        })
        setAuthHeaders(Storage, response.headers)
        persistAuthHeadersInDeviceStorage(Storage, response.headers)
        const userAttributesToSave = getUserAttributesFromResponse(
          userAttributes,
          response
        )
        dispatch(verifyTokenRequestSucceeded(userAttributesToSave))
      } catch (error) {
        dispatch(verifyTokenRequestFailed())
      }
    }

  const signInUser = (userSignInCredentials: UserSignInCredentials) =>
    async function(dispatch: Dispatch<{}>): Promise<void> {
      dispatch(signInRequestSent())
      const { email, password } = userSignInCredentials
      try {
        const response = await axios({
          method: 'POST',
          url: `${authUrl}/sign_in`,
          data: {
            email,
            password
          }
        })
        setAuthHeaders(Storage, response.headers)
        persistAuthHeadersInDeviceStorage(Storage, response.headers)
        const userAttributesToSave = getUserAttributesFromResponse(
          userAttributes,
          response
        )
        dispatch(signInRequestSucceeded(userAttributesToSave))
      } catch (error) {
        dispatch(signInRequestFailed())
        throw error
      }
    }

  const signOutUser = () =>
    async function(dispatch: Dispatch<{}>): Promise<void> {
      const userSignOutCredentials: UserSignOutCredentials = {
        'access-token': (await Storage.getItem('access-token')) as string,
        client: (await Storage.getItem('client')) as string,
        uid: (await Storage.getItem('uid')) as string
      }
      dispatch(signOutRequestSent())
      try {
        await axios({
          method: 'DELETE',
          url: `${authUrl}/sign_out`,
          data: userSignOutCredentials
        })
        deleteAuthHeaders()
        deleteAuthHeadersFromDeviceStorage(Storage)
        dispatch(signOutRequestSucceeded())
      } catch (error) {
        dispatch(signOutRequestFailed())
        throw error
      }
    }

  const verifyCredentials = async (store: Store<{}>): Promise<void> => {
    if (await Storage.getItem('access-token')) {
      const verificationParams: VerificationParams = {
        'access-token': (await Storage.getItem('access-token')) as string,
        client: (await Storage.getItem('client')) as string,
        uid: (await Storage.getItem('uid')) as string
      }
      store.dispatch<any>(verifyToken(verificationParams))
    } else {
      store.dispatch(setHasVerificationBeenAttempted(true))
    }
  }

  return {
    registerUser,
    verifyToken,
    signInUser,
    signOutUser,
    updateUser,
    verifyCredentials
  }
}

export default generateAuthActions