import io.javalin.Javalin

fun main() {
    val app = Javalin.create().start(7000)
    app.get("/") { ctx -> ctx.result("Hello World") }
}

val app = Javalin.create { config ->
    config.defaultContentType = "application/json"
    config.autogenerateEtags = true
    config.addStaticFiles("/public")
    config.asyncRequestTimeout = 10_000L
    config.dynamicGzip = true
    config.enforceSsl = true
}.routes {
    path("users") {
        get(UserController::getAll)
        post(UserController::create)
        path(":user-id") {
            get(UserController::getOne)
            patch(UserController::update)
            delete(UserController::delete)
        }
        ws("events", userController::webSocketEvents)
    }
}.start(port)

app.ws("/websocket/:path") { ws ->
    ws.onConnect { ctx -> println("Connected") }
    ws.onMessage { ctx ->
        val user = ctx.message<User>(); // convert from json string to object
        ctx.send(user); // convert to json string and send back
    }
    ws.onClose { ctx -> println("Closed") }
    ws.onError { ctx -> println("Errored") }
}

app.before("/some-path/*") { ctx ->  ... } // runs before requests to /some-path/*
app.before { ctx -> ... } // runs before all requests
app.after { ctx -> ... } // runs after all requests
app.exception(Exception.class) { e, ctx -> ... } // runs if uncaught Exception
app.error(404) { ctx -> ... } // runs if status is 404 (after all other handlers)

app.wsBefore("/some-path/*") { ws ->  ... } // runs before ws events on /some-path/*
app.wsBefore { ws -> ... } // runs before all ws events
app.wsAfter { ws -> ... } // runs after all ws events
app.wsException(Exception.class) { e, ctx -> ... } // runs if uncaught Exception in ws handler

var todos = arrayOf(...)
app.get("/todos") { ctx -> // map array of Todos to json-string
    ctx.json(todos)
}
app.put("/todos") { ctx -> // map request-body (json) to array of Todos
    todos = ctx.body<Array<Todo>>()
    ctx.status(204)
}

app.post("/upload") { ctx ->
    ctx.uploadedFiles("files").forEach { (contentType, content, name, extension) ->
        FileUtil.streamToFile(content, "upload/$name")
    }
}