module LoggedIn.Income.View
  ( view
  ) where

import Dict
import Date
import Time exposing (Time)

import Html exposing (..)
import Html.Events exposing (..)
import Html.Attributes exposing (..)
import Form exposing (Form)
import Form.Input as Input

import LoggedData exposing (LoggedData)

import Model.Income exposing (IncomeId, Income, userCumulativeIncomeSince)
import Model.Translations exposing (getMessage, getParamMessage)
import Model.Payer exposing (useIncomesFrom)
import Model.User exposing (UserId, User)
import LoggedIn.Income.Model as IncomeModel

import Mailbox

import Action
import LoggedIn.Action as LoggedInAction
import LoggedIn.Income.Action as IncomeAction

import LoggedIn.View.Date exposing (renderShortDate)
import LoggedIn.View.Format as Format

import Utils.Maybe exposing (isJust)

import LoggedIn.View.Date exposing (renderLongDate)
import View.Events exposing (onSubmitPrevDefault)

view : LoggedData -> IncomeModel.Model -> Html
view loggedData incomeModel =
  div
    [ class "income" ]
    [ case useIncomesFrom loggedData.users loggedData.incomes loggedData.payments of
        Just since -> cumulativeIncomesView loggedData since
        Nothing -> text ""
    , h1 [] [ text <| getMessage "AddIncome" loggedData.translations ]
    , addIncomeView loggedData incomeModel.addIncome
    , h1 [] [ text <| getMessage "MonthlyNetIncomes" loggedData.translations ]
    , incomesView loggedData
    ]

cumulativeIncomesView : LoggedData -> Time -> Html
cumulativeIncomesView loggedData since =
  let longDate = renderLongDate (Date.fromTime since) loggedData.translations
  in  div
        []
        [ h1 [] [ text <| getParamMessage [longDate] "CumulativeIncomesSince" loggedData.translations ]
        , ul
            []
            ( Dict.toList loggedData.users
                |> List.map (\(userId, user) ->
                     (user.name, userCumulativeIncomeSince loggedData.currentTime since loggedData.incomes userId)
                   )
                |> List.sortBy snd
                |> List.map (\(userName, cumulativeIncome) ->
                     li
                       []
                       [ text userName
                       , text " − "
                       , text <| Format.price loggedData.conf cumulativeIncome
                       ]
                   )
            )
        ]

addIncomeView : LoggedData -> Form () IncomeModel.AddIncome -> Html
addIncomeView loggedData addIncome =
  let
    formAddress = Signal.forwardTo Mailbox.address (Action.UpdateLoggedIn << LoggedInAction.IncomeAction << IncomeAction.AddIncomeAction)
    errorFor error field =
      if isJust field.liveError
        then div [ class "error" ] [ text (getMessage error loggedData.translations) ]
        else text ""
    creation = Form.getFieldAsString "creation" addIncome
    amount = Form.getFieldAsString "amount" addIncome
  in
    Html.form
      [ onSubmitPrevDefault Mailbox.address Action.NoOp ]
      [ label [] [ text "Creation" ]
      , Input.textInput creation formAddress []
      , errorFor "DateValidationError" creation

      , label [] [ text "amount" ]
      , Input.textInput amount formAddress []
      , errorFor "IncomeValidationError" amount

      , button
          [ case Form.getOutput addIncome of
              Just data ->
                onClick Mailbox.address (Action.UpdateLoggedIn <| LoggedInAction.AddIncome data.creation data.amount)
              Nothing ->
                onClick formAddress Form.Submit
          ]
          [ text (getMessage "Add" loggedData.translations) ]
      ]

incomesView : LoggedData -> Html
incomesView loggedData =
  ul
    []
    ( loggedData.incomes
        |> Dict.toList
        |> List.filter ((==) loggedData.me << .userId << snd)
        |> List.sortBy (.creation << snd)
        |> List.reverse
        |> List.map (incomeView loggedData)
    )

incomeView : LoggedData -> (IncomeId, Income) -> Html
incomeView loggedData (incomeId, income) =
  li
    []
    [ text <| renderShortDate (Date.fromTime income.creation) loggedData.translations
    , text "    −    "
    , text <| Format.price loggedData.conf income.amount
    , text "    −    "
    , button
        [ onClick Mailbox.address (Action.UpdateLoggedIn <| LoggedInAction.DeleteIncome incomeId) ]
        [ text "x" ]
    ]