module Update
  ( update
  ) where

import Task

import Effects exposing (Effects)

import ServerCommunication exposing (sendRequest)

import Model exposing (Model)
import Model.Action exposing (..)
import Model.View as V
import Model.View.SignInView exposing (..)
import Model.View.LoggedInView exposing (..)
import Model.Communication exposing (Communication)

import Update.LoggedIn exposing (updateLoggedIn)
import Update.SignIn exposing (updateSignIn)

update : Action -> Model -> (Model, Effects Action)
update action model =
  case action of

    NoOp ->
      (model, Effects.none)

    ServerCommunication communication ->
      ( model
      , sendRequest communication
          |> flip Task.onError (always <| Task.succeed NoOp)
          |> Effects.task
      )

    UpdateTime time ->
      ({ model | currentTime = time }, Effects.none)

    GoSignInView ->
      ({ model | view = V.SignInView initSignInView }, Effects.none)

    GoLoggedInView users me monthlyPayments payments paymentsCount payers ->
      ( { model | view = V.LoggedInView (initLoggedInView users me monthlyPayments payments paymentsCount payers) }
      , Effects.none
      )

    UpdateSignIn signInAction ->
      case model.view of
        V.SignInView signInView ->
          ( { model | view = V.SignInView (updateSignIn signInAction signInView) }
          , Effects.none
          )
        _ ->
          (model, Effects.none)

    UpdateLoggedIn loggedAction ->
      case model.view of
        V.LoggedInView loggedInView ->
          ( { model | view = V.LoggedInView (updateLoggedIn model loggedAction loggedInView) }
          , Effects.none
          )
        _ ->
          (model, Effects.none)