package net.minecraft.server;

import com.mojang.datafixers.util.Either;
import io.netty.buffer.ByteBuf;
import java.net.URI;
import java.util.List;
import java.util.Optional;
import java.util.function.IntFunction;
import net.minecraft.network.chat.Component;
import net.minecraft.network.chat.ComponentSerialization;
import net.minecraft.network.codec.ByteBufCodecs;
import net.minecraft.network.codec.StreamCodec;
import net.minecraft.util.ByIdMap;

public record ServerLinks(List<ServerLinks.Entry> entries) {
	public static final ServerLinks EMPTY = new ServerLinks(List.of());
	public static final StreamCodec<ByteBuf, Either<ServerLinks.KnownLinkType, Component>> TYPE_STREAM_CODEC = ByteBufCodecs.either(
		ServerLinks.KnownLinkType.STREAM_CODEC, ComponentSerialization.TRUSTED_CONTEXT_FREE_STREAM_CODEC
	);
	public static final StreamCodec<ByteBuf, List<ServerLinks.UntrustedEntry>> UNTRUSTED_LINKS_STREAM_CODEC = ServerLinks.UntrustedEntry.STREAM_CODEC
		.apply(ByteBufCodecs.list());

	public boolean isEmpty() {
		return this.entries.isEmpty();
	}

	public Optional<ServerLinks.Entry> findKnownType(final ServerLinks.KnownLinkType type) {
		return this.entries.stream().filter(e -> e.type.<Boolean>map(l -> l == type, r -> false)).findFirst();
	}

	public List<ServerLinks.UntrustedEntry> untrust() {
		return this.entries.stream().map(e -> new ServerLinks.UntrustedEntry(e.type, e.link.toString())).toList();
	}

	public record Entry(Either<ServerLinks.KnownLinkType, Component> type, URI link) {
		public static ServerLinks.Entry knownType(final ServerLinks.KnownLinkType type, final URI link) {
			return new ServerLinks.Entry(Either.left(type), link);
		}

		public static ServerLinks.Entry custom(final Component displayName, final URI link) {
			return new ServerLinks.Entry(Either.right(displayName), link);
		}

		public Component displayName() {
			return this.type.map(ServerLinks.KnownLinkType::displayName, r -> r);
		}
	}

	public static enum KnownLinkType {
		BUG_REPORT(0, "report_bug"),
		COMMUNITY_GUIDELINES(1, "community_guidelines"),
		SUPPORT(2, "support"),
		STATUS(3, "status"),
		FEEDBACK(4, "feedback"),
		COMMUNITY(5, "community"),
		WEBSITE(6, "website"),
		FORUMS(7, "forums"),
		NEWS(8, "news"),
		ANNOUNCEMENTS(9, "announcements");

		private static final IntFunction<ServerLinks.KnownLinkType> BY_ID = ByIdMap.continuous(e -> e.id, values(), ByIdMap.OutOfBoundsStrategy.ZERO);
		public static final StreamCodec<ByteBuf, ServerLinks.KnownLinkType> STREAM_CODEC = ByteBufCodecs.idMapper(BY_ID, e -> e.id);
		private final int id;
		private final String name;

		private KnownLinkType(final int id, final String name) {
			this.id = id;
			this.name = name;
		}

		private Component displayName() {
			return Component.translatable("known_server_link." + this.name);
		}

		public ServerLinks.Entry create(final URI link) {
			return ServerLinks.Entry.knownType(this, link);
		}
	}

	public record UntrustedEntry(Either<ServerLinks.KnownLinkType, Component> type, String link) {
		public static final StreamCodec<ByteBuf, ServerLinks.UntrustedEntry> STREAM_CODEC = StreamCodec.composite(
			ServerLinks.TYPE_STREAM_CODEC,
			ServerLinks.UntrustedEntry::type,
			ByteBufCodecs.STRING_UTF8,
			ServerLinks.UntrustedEntry::link,
			ServerLinks.UntrustedEntry::new
		);
	}
}