module Examples.Text exposing (example, State, Msg)

{-|

@docs example, State, Msg

-}

import Category exposing (Category(..))
import CommonControls
import Css
import Debug.Control as Control exposing (Control)
import Debug.Control.Extra as ControlExtra
import Debug.Control.View as ControlView
import Example exposing (Example)
import Html.Styled as Html exposing (Html)
import Html.Styled.Attributes exposing (css)
import Nri.Ui.Heading.V2 as Heading
import Nri.Ui.Text.V6 as Text


{-| -}
example : Example State Msg
example =
    { name = "Text"
    , version = 6
    , categories = [ Text ]
    , keyboardSupport = []
    , state = init
    , update = update
    , subscriptions = \_ -> Sub.none
    , preview =
        [ Text.caption [ Text.plaintext "caption" ]
        , Text.smallBody [ Text.plaintext "smallBody" ]
        , Text.mediumBody [ Text.plaintext "mediumBody" ]
        , Text.ugMediumBody [ Text.plaintext "ugMediumBody" ]
        ]
    , view =
        \state ->
            let
                attributes =
                    List.map Tuple.second (Control.currentValue state.control)
            in
            [ Text.caption [ Text.plaintext "NOTE: When using these styles, please read the documentation in the Elm module about \"Understanding spacing\"" ]
            , ControlView.view
                { update = UpdateControl
                , settings = state.control
                , toExampleCode =
                    \settings ->
                        let
                            toExampleCode name =
                                { sectionName = name
                                , code =
                                    "Text."
                                        ++ name
                                        ++ "\n    [ "
                                        ++ String.join "\n    , " (List.map Tuple.first settings)
                                        ++ "\n    ]"
                                }
                        in
                        [ toExampleCode "mediumBody"
                        , toExampleCode "smallBody"
                        , toExampleCode "smallBodyGray"
                        , toExampleCode "caption"
                        , toExampleCode "ugMediumBody"
                        , toExampleCode "ugSmallBody"
                        ]
                }
            , Heading.h2 [] [ Html.text "Examples" ]
            , Heading.h3 [] [ Html.text "Paragraph styles" ]
            , viewExamples
                [ ( "mediumBody", Text.mediumBody )
                , ( "smallBody", Text.smallBody )
                , ( "smallBodyGray", Text.smallBodyGray )
                , ( "caption", Text.caption )
                ]
                attributes
            , Heading.h3 [] [ Html.text "Paragraph styles for user-authored content" ]
            , viewExamples
                [ ( "ugMediumBody", Text.ugMediumBody )
                , ( "ugSmallBody", Text.ugSmallBody )
                ]
                attributes
            ]
    }


viewExamples : List ( String, List (Text.Attribute msg) -> Html msg ) -> List (Text.Attribute msg) -> Html msg
viewExamples examples attributes =
    let
        viewExample ( name, view ) =
            Html.tr []
                [ Html.th [] [ Html.text name ]
                , Html.td [] [ view attributes ]
                ]
    in
    Html.table [ css [ Css.width (Css.pct 100) ] ]
        [ Html.tbody [] <|
            List.map viewExample examples
        ]


{-| -}
type alias State =
    { control : Control (List ( String, Text.Attribute Msg ))
    }


{-| -}
init : State
init =
    { control =
        ControlExtra.list
            |> ControlExtra.listItem "content" controlContent
            |> ControlExtra.optionalBoolListItem "noBreak"
                ( "Text.noBreak True", Text.noBreak True )
            |> CommonControls.css { moduleName = "Text", use = Text.css }
    }


controlContent : Control ( String, Text.Attribute msg )
controlContent =
    CommonControls.content
        { moduleName = "Text"
        , plaintext = Text.plaintext
        , markdown = Just Text.markdown
        , html = Text.html
        , httpError = Nothing
        }


{-| -}
type Msg
    = UpdateControl (Control (List ( String, Text.Attribute Msg )))


{-| -}
update : Msg -> State -> ( State, Cmd Msg )
update msg state =
    case msg of
        UpdateControl newControl ->
            ( { state | control = newControl }, Cmd.none )