package io.dico.parcels2.command

import io.dico.dicore.command.*
import io.dico.dicore.command.registration.reflect.ReflectiveRegistration
import io.dico.parcels2.Interactables
import io.dico.parcels2.ParcelsPlugin
import io.dico.parcels2.logger
import java.util.LinkedList
import java.util.Queue

@Suppress("UsePropertyAccessSyntax")
fun getParcelCommands(plugin: ParcelsPlugin): ICommandDispatcher =
    with(CommandBuilder()) {
        val parcelsAddress = SpecialCommandAddress()

        setChatController(ParcelsChatController())
        addParameterType(false, ParcelParameterType(plugin.parcelProvider))
        addParameterType(false, ProfileParameterType())
        addParameterType(true, ParcelTarget.PType(plugin.parcelProvider, parcelsAddress))

        group(parcelsAddress, "parcel", "plot", "plots", "p") {
            addRequiredPermission("parcels.command")
            registerCommands(CommandsGeneral(plugin, parcelsAddress))
            registerCommands(CommandsPrivilegesLocal(plugin))

            group("option", "opt", "o") {
                setGroupDescription(
                    "changes interaction options for this parcel",
                    "Sets whether players who are not allowed to",
                    "build here can interact with certain things."
                )

                group("interact", "i") {
                    val command = ParcelOptionsInteractCommand(plugin.parcelProvider)
                    Interactables.classesById.forEach {
                        addSubCommand(it.name, command)
                    }
                }
            }

            group("global", "g") {
                registerCommands(CommandsPrivilegesGlobal(plugin))
            }

            group("admin", "a") {
                registerCommands(CommandsAdmin(plugin))
            }

            if (!logger.isDebugEnabled) return@group

            group("debug", "d") {
                registerCommands(CommandsDebug(plugin))
            }
        }

        generateHelpAndSyntaxCommands()
        getDispatcher()
    }

inline fun CommandBuilder.group(name: String, vararg aliases: String, config: CommandBuilder.() -> Unit) {
    group(name, *aliases)
    config()
    parent()
}

inline fun CommandBuilder.group(address: ICommandAddress, name: String, vararg aliases: String, config: CommandBuilder.() -> Unit) {
    group(address, name, *aliases)
    config()
    parent()
}

private fun CommandBuilder.generateHelpAndSyntaxCommands(): CommandBuilder {
    generateCommands(dispatcher as ICommandAddress, "help", "syntax")
    return this
}

private fun generateCommands(address: ICommandAddress, vararg names: String) {
    val addresses: Queue<ICommandAddress> = LinkedList()
    addresses.offer(address)

    while (addresses.isNotEmpty()) {
        val cur = addresses.poll()
        addresses.addAll(cur.children.values.distinct())
        if (cur.hasCommand()) {
            ReflectiveRegistration.generateCommands(cur, names)
        }
    }
}

class SpecialCommandAddress : ChildCommandAddress() {
    private val speciallyTreatedKeys = mutableListOf<String>()

    // Used to allow /p h:1 syntax, which is the same as what PlotMe uses.
    var speciallyParsedIndex: Int? = null; private set

    fun addSpeciallyTreatedKeys(vararg keys: String) {
        for (key in keys) {
            speciallyTreatedKeys.add(key + ":")
        }
    }

    @Throws(CommandException::class)
    override fun getChild(key: String, context: ExecutionContext): ChildCommandAddress? {
        speciallyParsedIndex = null

        for (specialKey in speciallyTreatedKeys) {
            if (key.startsWith(specialKey)) {
                val result = getChild(specialKey.substring(0, specialKey.length - 1))
                    ?: return null

                val text = key.substring(specialKey.length)
                val num = text.toIntOrNull() ?: throw CommandException("$text is not a number")
                speciallyParsedIndex = num

                return result
            }
        }

        return super.getChild(key)
    }

}