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package moe.nea.firmament.commands
import com.mojang.brigadier.arguments.ArgumentType
import com.mojang.brigadier.builder.ArgumentBuilder
import com.mojang.brigadier.builder.RequiredArgumentBuilder
import com.mojang.brigadier.context.CommandContext
import com.mojang.brigadier.suggestion.SuggestionProvider
import kotlinx.coroutines.launch
import moe.nea.firmament.Firmament
import moe.nea.firmament.util.MinecraftDispatcher
import moe.nea.firmament.util.iterate
import net.fabricmc.fabric.api.client.command.v2.FabricClientCommandSource
import java.lang.reflect.ParameterizedType
import java.lang.reflect.Type
import java.lang.reflect.TypeVariable
typealias DefaultSource = FabricClientCommandSource
inline val <T : CommandContext<*>> T.context get() = this
operator fun <T : Any, C : CommandContext<*>> C.get(arg: TypeSafeArg<T>): T {
return arg.get(this)
}
fun literal(
name: String,
block: CaseInsensitiveLiteralCommandNode.Builder<DefaultSource>.() -> Unit
): CaseInsensitiveLiteralCommandNode.Builder<DefaultSource> =
CaseInsensitiveLiteralCommandNode.Builder<DefaultSource>(name).also(block)
private fun normalizeGeneric(argument: Type): Class<*> {
return when (argument) {
is Class<*> -> argument
is TypeVariable<*> -> normalizeGeneric(argument.bounds[0])
is ParameterizedType -> normalizeGeneric(argument.rawType)
else -> Any::class.java
}
}
data class TypeSafeArg<T : Any>(val name: String, val argument: ArgumentType<T>) {
val argClass by lazy {
argument.javaClass
.iterate<Class<in ArgumentType<T>>> {
it.superclass
}
.flatMap {
it.genericInterfaces.toList()
}
.filterIsInstance<ParameterizedType>()
.find { it.rawType == ArgumentType::class.java }!!
.let { normalizeGeneric(it.actualTypeArguments[0]) }
}
@JvmName("getWithThis")
fun <S> CommandContext<S>.get(): T =
get(this)
fun <S> get(ctx: CommandContext<S>): T {
try {
return ctx.getArgument(name, argClass) as T
} catch (e: Exception) {
if (ctx.child != null) {
return get(ctx.child)
}
throw e
}
}
}
fun <T : Any> argument(
name: String,
argument: ArgumentType<T>,
block: RequiredArgumentBuilder<DefaultSource, T>.(TypeSafeArg<T>) -> Unit
): RequiredArgumentBuilder<DefaultSource, T> =
RequiredArgumentBuilder.argument<DefaultSource, T>(name, argument).also { block(it, TypeSafeArg(name, argument)) }
fun <T : ArgumentBuilder<DefaultSource, T>, AT : Any> T.thenArgument(
name: String,
argument: ArgumentType<AT>,
block: RequiredArgumentBuilder<DefaultSource, AT>.(TypeSafeArg<AT>) -> Unit
): T = then(argument(name, argument, block))
fun <T : RequiredArgumentBuilder<DefaultSource, String>> T.suggestsList(provider: CommandContext<DefaultSource>.() -> Iterable<String>) {
suggests(SuggestionProvider<DefaultSource> { context, builder ->
provider(context)
.asSequence()
.filter { it.startsWith(builder.remaining, ignoreCase = true) }
.forEach {
builder.suggest(it)
}
builder.buildFuture()
})
}
fun <T : ArgumentBuilder<DefaultSource, T>> T.thenLiteral(
name: String,
block: CaseInsensitiveLiteralCommandNode.Builder<DefaultSource>.() -> Unit
): T =
then(literal(name, block))
fun <T : ArgumentBuilder<DefaultSource, T>> T.then(node: ArgumentBuilder<DefaultSource, *>, block: T.() -> Unit): T =
then(node).also(block)
fun <T : ArgumentBuilder<DefaultSource, T>> T.thenExecute(block: suspend CommandContext<DefaultSource>.() -> Unit): T =
executes {
Firmament.coroutineScope.launch(MinecraftDispatcher) {
block(it)
}
1
}
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