import io.ktor.server.application.*
import io.ktor.server.request.*
import io.ktor.server.response.*
import io.ktor.server.routing.*
import io.ktor.util.pipeline.*
import kotlinx.html.*

fun Routing.racePage() {
    get("/race/list") {
        raceOverviewPage(RaceHolder.races)
    }

    get("/races/{id}/show") {

    }

    get("/races/{raceId}/remove/{trackId}") {
        val raceId = call.parameters["raceId"]
        val trackId = call.parameters["trackId"]?.toLong()

        RaceHolder.races.find { it.name == raceId }?.let { raceData ->
            val toBeRemovedTrack = raceData.getTracks().find { it.trackId == trackId }
            toBeRemovedTrack?.let {
                raceData.removeTrack(it)
            }
        }
        call.respondRedirect("/races/$raceId/show")
    }

    get("/race/new") {
        newRacePage()
    }

    post("/race/new") {
        val parameters = call.receiveParameters()
        val name = parameters["name"]
        val description = parameters["description"]

        if (name == null || description == null) {
            newRacePage("Not all parameters given.", name ?: "", description ?: "")
            return@post
        }
        if (RaceHolder.races.any { it.name == name }) {
            newRacePage("Race with the same name already exists.", name, description)
            return@post
        }

        RaceHolder.races.add(RaceData(name, description))
        call.respondRedirect("/race/list")
    }
}

private suspend fun PipelineContext<Unit, ApplicationCall>.raceOverviewPage(races: ArrayList<RaceData>) {
    respondThemedHtml("Race Overview") {
        div("raceList") {
            races.forEach {
                div("raceEntry") {
                    h1 { +it.name }
                    p { +it.description }
                }
            }
        }
    }
}

private suspend fun PipelineContext<Unit, ApplicationCall>.newRacePage(
    error: String? = null,
    name: String = "",
    description: String = ""
) {
    respondThemedHtml("Race Overview") {
        form("/race/new", encType = FormEncType.applicationXWwwFormUrlEncoded, method = FormMethod.post) {
            error?.let {
                p(classes = "error") {
                    +it
                }
            }
            p {
                +"Name:"
                textInput(name = "name") {
                    value = name
                }
            }
            p {
                +"Description:"
            }
            p {
                TEXTAREA(mapOf("name" to "description", "rows" to "4", "cols" to "40"), consumer).visit {
                    +description
                }
            }
            p {
                submitInput()
            }
        }
    }
}