{-
   - This file is part of `typers`.
   -
   - `typers` is free software: you can redistribute it and/or modify
   - it under the terms of the GNU Affero Public License as published by
   - the Free Software Foundation, either version 3 of the License, or
   - (at your option) any later version.
   -
   - `typers` is distributed in the hope that it will be useful,
   - but WITHOUT ANY WARRANTY; without even the implied warranty of
   - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   - GNU Affero Public License for more details.
   -
   - You should have received a copy of the GNU Affero Public License
   - along with `typers`.  If not, see <https://www.gnu.org/licenses/>.
-}


module Views exposing (..)

import Array exposing (..)
import Base exposing (..)
import Css exposing (..)
import Html
import Html.Styled exposing (..)
import Html.Styled.Attributes exposing (css, href)
import Html.Styled.Events exposing (onClick)
import Styles exposing (..)
import Time exposing (Posix, toHour, toMinute, toSecond, utc)
import Utils exposing (diffDuration, isNothing, wordCountWith)


viewTime : Posix -> String
viewTime t =
    let
        hh =
            toHour utc t

        mm =
            toMinute utc t

        ss =
            toSecond utc t
    in
    String.join ":" (List.map String.fromInt [ hh, mm, ss ])


viewWpm : Model -> Maybe String
viewWpm model =
    let
        t1 =
            model.begin

        t2 =
            model.end

        duration =
            Maybe.map2 diffDuration t1 t2

        correctWords =
            wordCountWith model.words ((==) Correct)
    in
    Maybe.map (String.fromInt << truncate << (*) 60 << (/) (toFloat correctWords)) duration


viewProgress : Model -> String
viewProgress model =
    let
        soFar =
            model.currentWord + 1

        total =
            model.config.length
    in
    String.fromInt soFar ++ ":" ++ String.fromInt total


viewAccuracy : Model -> Maybe String
viewAccuracy model =
    if isNothing model.end then
        Nothing

    else
        let
            words =
                model.words

            wordsAttempted =
                toFloat <| wordCountWith words ((/=) Todo)

            correctCount =
                toFloat <| wordCountWith words ((==) Correct)

            accuracy =
                if wordsAttempted == 0.0 then
                    Nothing

                else
                    Just <| String.fromInt <| truncate <| correctCount / wordsAttempted * 100
        in
        accuracy


viewWordLengthOptions : Base.Config -> Html Msg
viewWordLengthOptions config =
    let
        wl =
            [ 10, 25, 50, 100 ]
    in
    ul
        [ css
            [ margin zero
            , listStyle Css.none
            , display inlineBlock
            , paddingLeft (px 0)
            ]
        ]
        (List.map
            (\len ->
                li
                    [ css [ display inline ] ]
                    [ styledButton
                        [ onClick (Base.WordLengthChanged len)
                        , css <|
                            List.singleton <|
                                if config.length == len then
                                    textDecoration underline

                                else
                                    textDecoration Css.none
                        ]
                        [ text <| String.fromInt len ]
                    ]
            )
            wl
        )


viewStats : Model -> Html Msg
viewStats model =
    let
        wpm =
            viewWpm model

        acc =
            viewAccuracy model

        stats =
            Maybe.map2 (\w a -> w ++ " words per minute · " ++ a ++ "% accuracy") wpm acc
    in
    p []
        [ text (Maybe.withDefault "" stats) ]


viewFooter : Html Msg
viewFooter =
    let
        footerItems =
            [ ( "src", "https://git.peppe.rs/web/typers/about" )
            , ( "license", "https://git.peppe.rs/web/typers/tree/COPYING" )
            ]
    in
    styledUnorderedList []
        (List.map
            (\( inner, hr ) ->
                styledListItem []
                    [ styledExternalLink [ href hr ] [ text inner ] ]
            )
            footerItems
        )