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

{-|

@docs example, State, Msg

-}

import Accessibility.Styled exposing (..)
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.Attributes exposing (css, href)
import Nri.Ui.BreadCrumbs.V1 as BreadCrumbs exposing (BreadCrumb, BreadCrumbs)
import Nri.Ui.Colors.V1 as Colors
import Nri.Ui.Fonts.V1 as Fonts
import Nri.Ui.Svg.V1 as Svg
import Nri.Ui.Text.V6 as Text
import Nri.Ui.UiIcon.V1 as UiIcon


{-| -}
type alias State =
    Control Settings


moduleName : String
moduleName =
    "BreadCrumbs"


version : Int
version =
    1


{-| -}
example : Example State Msg
example =
    { name = moduleName
    , version = version
    , categories = [ Layout ]
    , keyboardSupport = []
    , state = init
    , update = update
    , subscriptions = \_ -> Sub.none
    , preview =
        [ previewContainer [ previewText "🏠 Home" ]
        , previewContainer [ previewText "🏠 Home", previewArrowRight, previewText "🟠 Category " ]
        , previewContainer [ previewText "🏠", previewArrowRight, previewText "🟠", previewArrowRight, previewText "🟣 Sub-Category " ]
        ]
    , view =
        \ellieLinkConfig state ->
            [ ControlView.view
                { ellieLinkConfig = ellieLinkConfig
                , name = moduleName
                , version = version
                , update = UpdateControl
                , settings = state
                , mainType = "RootHtml.Html msg"
                , extraImports = []
                , toExampleCode =
                    \a ->
                        -- TODO: implement
                        -- List { sectionName : String, code : String }
                        []
                }
            , BreadCrumbs.view
                { aTagAttributes = \route -> [ href route ]
                , isCurrentRoute = \_ -> False
                }
                (Control.currentValue state).breadCrumbs
            ]
    }


previewContainer : List (Html msg) -> Html msg
previewContainer =
    span
        [ css
            [ Css.displayFlex
            , Css.alignItems Css.center
            , Fonts.baseFont
            , Css.fontSize (Css.px 10)
            , Css.fontWeight (Css.int 600)
            , Css.color Colors.navy
            ]
        ]


previewText : String -> Html msg
previewText name =
    span [ css [ Css.margin (Css.px 2) ] ] [ text name ]


previewArrowRight : Html msg
previewArrowRight =
    UiIcon.arrowRight
        |> Svg.withColor Colors.gray75
        |> Svg.withHeight (Css.px 10)
        |> Svg.withWidth (Css.px 8)
        |> Svg.withCss [ Css.flexShrink Css.zero ]
        |> Svg.toHtml


{-| -}
type Msg
    = UpdateControl (Control Settings)


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


type alias Settings =
    { breadCrumbs : BreadCrumbs String
    }


init : Control Settings
init =
    Control.map Settings controlBreadCrumbs


controlBreadCrumbs : Control (BreadCrumbs String)
controlBreadCrumbs =
    Control.map (\f -> f Nothing) (controlBreadCrumbs_ 1)


controlBreadCrumbs_ : Int -> Control (Maybe (BreadCrumbs String) -> BreadCrumbs String)
controlBreadCrumbs_ index =
    Control.record
        (\icon iconStyle text after maybeBase ->
            let
                breadCrumb =
                    { icon = icon
                    , iconStyle = iconStyle
                    , text = text
                    , id = "breadcrumb-id-" ++ String.fromInt index
                    , route = "/breadcrumb=" ++ String.fromInt index
                    }

                newBase =
                    case maybeBase of
                        Just base ->
                            BreadCrumbs.after base breadCrumb

                        Nothing ->
                            BreadCrumbs.init breadCrumb
            in
            Maybe.map (\f -> f (Just newBase)) after |> Maybe.withDefault newBase
        )
        |> Control.field "icon" (Control.maybe False (Control.map Tuple.second CommonControls.uiIcon))
        |> Control.field "iconStyle"
            (Control.choice
                [ ( "Default", Control.value BreadCrumbs.Default )
                , ( "Circled", Control.value BreadCrumbs.Circled )
                ]
            )
        |> Control.field "text" (Control.string ("Category " ++ String.fromInt index))
        |> Control.field ("category " ++ String.fromInt (index + 1))
            (Control.maybe False
                (Control.lazy
                    (\() -> controlBreadCrumbs_ (index + 1))
                )
            )