port module Main exposing (main)

import Browser
import Browser.Navigation as Nav
import Html exposing (..)
import Html.Attributes exposing (..)
import Html.Events exposing (onClick, onInput)
import Model exposing (Model)
import Navigation
import Random
import Url
import Url.Parser
import WsMessage exposing (createSession)


main =
    Browser.application
        { init = init
        , onUrlChange = UrlChanged
        , onUrlRequest = LinkClicked
        , subscriptions = subscriptions
        , update = update
        , view = view
        }


port wsout : String -> Cmd msg


port wsin : (String -> msg) -> Sub msg


{-| currently no flags are needed
that's the reason for the generic type and \_ as param name
-}
init : { userUuid : String } -> Url.Url -> Nav.Key -> ( Model, Cmd Msg )
init flags url key =
    let
        route : Navigation.Route
        route =
            Url.Parser.parse Navigation.routeParser url
                |> Maybe.withDefault Navigation.Home

        initInfo : Model.InitInfo
        initInfo =
            Model.InitInfo key route url flags.userUuid

        model : Model
        model =
            Model.initialModel initInfo
    in
    routeChanged route model


subscriptions : Model -> Sub Msg
subscriptions _ =
    wsin WsIn


type Msg
    = UrlChanged Url.Url
    | LinkClicked Browser.UrlRequest
    | WsIn String
    | WsOut String
    | CreateRetro
    | CreatePoker
    | NameChanged String
    | NameGenerated ScrambledName
    | RandomizeName



-- BOOT TIME


type alias ScrambledName =
    { prefix : String
    , suffix : String
    }


randomUserName : Cmd Msg
randomUserName =
    let
        prefixes =
            [ "Joyful"
            , "Squiddly"
            , "Fast"
            , "Tinkering"
            , "Freezy"
            , "Warm-To-The-Touch"
            , "Red"
            , "Pale"
            , "Hardy"
            , "Hardened"
            , "Rocky"
            , "Pokey"
            , "Screeching"
            , "Sweet"
            , "Grumpy"
            , "Tempered"
            , "Bendy"
            ]

        suffixes =
            [ "Rock"
            , "Impala"
            , "Liliac"
            , "Bike"
            , "Tinker"
            , "Red"
            , "Green"
            , "Squid"
            , "Sponge"
            , "Star"
            , "Fish"
            , "Tandem"
            , "Ground dweller"
            , "Bird"
            , "Ice cream"
            , "Brush"
            , "Highborn"
            ]
    in
    Random.generate NameGenerated
        (Random.map2 ScrambledName
            (Random.uniform "Chuck" prefixes)
            (Random.uniform "Norris" suffixes)
        )



-- UPDATE PART


update : Msg -> Model -> ( Model, Cmd Msg )
update msg model =
    case msg of
        -- Navigation based messages
        LinkClicked urlRequest ->
            Navigation.linkClicked urlRequest model.key model

        UrlChanged url ->
            case Url.Parser.parse Navigation.routeParser url of
                Just route ->
                    routeChanged route model

                Nothing ->
                    -- TODO error reporting
                    ( { model | route = Navigation.Home }, Cmd.none )

        -- WEBSOCKETS
        WsOut wsmsg ->
            ( model, wsout wsmsg )

        WsIn strmsg ->
            ( model, Cmd.none )

        -- INIT
        NameChanged name ->
            ( { model | userName = name }, Cmd.none )

        NameGenerated scrambled ->
            ( { model | userName = scrambled.prefix ++ " " ++ scrambled.suffix }, Cmd.none )

        RandomizeName ->
            ( model, randomUserName )

        -- RETRO
        CreateRetro ->
            Debug.todo "implement create retro"

        -- POKER
        CreatePoker ->
            Debug.log (createSession model)
                ( model, wsout (createSession model) )


routeChanged : Navigation.Route -> Model -> ( Model, Cmd Msg )
routeChanged route model =
    case route of
        Navigation.Home ->
            ( { model | route = route }
            , randomUserName
            )

        Navigation.Poker session ->
            ( { model | route = route, session = Just session }
            , Cmd.none
            )



-- HTML STUFF


view : Model -> Browser.Document Msg
view model =
    { title = "Open-Retro"
    , body =
        [ nav []
            [ h1 [ class "app-title" ] [ text "Open-Retro" ]
            , ul []
                [ li []
                    [ input [ onInput NameChanged, value model.userName ]
                        []
                    ]
                , li []
                    [ button
                        [ onClick RandomizeName ]
                        [ text "🎲" ]
                    ]
                , li []
                    [ button
                        [ onClick CreateRetro ]
                        [ text "🂿 New retro" ]
                    ]
                , li []
                    [ button
                        [ onClick CreatePoker ]
                        [ text "🃠 New poker" ]
                    ]
                ]
            ]
        , main_ [] (appContent model)
        , node "link" [ rel "stylesheet", href "/compiled/css/style.css" ] []
        ]
    }


appContent : Model -> List (Html Msg)
appContent model =
    case model.route of
        Navigation.Home ->
            homePage model

        Navigation.Poker _ ->
            pokerPage model


homePage : Model -> List (Html Msg)
homePage _ =
    []


pokerPage : Model -> List (Html Msg)
pokerPage _ =
    []