package net.minecraft.server.commands;

import com.google.common.collect.Lists;
import com.mojang.brigadier.CommandDispatcher;
import com.mojang.brigadier.arguments.BoolArgumentType;
import com.mojang.brigadier.arguments.StringArgumentType;
import com.mojang.brigadier.exceptions.CommandSyntaxException;
import com.mojang.brigadier.exceptions.SimpleCommandExceptionType;
import java.util.Collection;
import java.util.Collections;
import net.minecraft.ChatFormatting;
import net.minecraft.commands.CommandBuildContext;
import net.minecraft.commands.CommandSourceStack;
import net.minecraft.commands.Commands;
import net.minecraft.commands.arguments.ColorArgument;
import net.minecraft.commands.arguments.ComponentArgument;
import net.minecraft.commands.arguments.ScoreHolderArgument;
import net.minecraft.commands.arguments.TeamArgument;
import net.minecraft.network.chat.Component;
import net.minecraft.network.chat.ComponentUtils;
import net.minecraft.world.scores.PlayerTeam;
import net.minecraft.world.scores.ScoreHolder;
import net.minecraft.world.scores.Scoreboard;
import net.minecraft.world.scores.Team;

public class TeamCommand {
	private static final SimpleCommandExceptionType ERROR_TEAM_ALREADY_EXISTS = new SimpleCommandExceptionType(
		Component.translatable("commands.team.add.duplicate")
	);
	private static final SimpleCommandExceptionType ERROR_TEAM_ALREADY_EMPTY = new SimpleCommandExceptionType(
		Component.translatable("commands.team.empty.unchanged")
	);
	private static final SimpleCommandExceptionType ERROR_TEAM_ALREADY_NAME = new SimpleCommandExceptionType(
		Component.translatable("commands.team.option.name.unchanged")
	);
	private static final SimpleCommandExceptionType ERROR_TEAM_ALREADY_COLOR = new SimpleCommandExceptionType(
		Component.translatable("commands.team.option.color.unchanged")
	);
	private static final SimpleCommandExceptionType ERROR_TEAM_ALREADY_FRIENDLYFIRE_ENABLED = new SimpleCommandExceptionType(
		Component.translatable("commands.team.option.friendlyfire.alreadyEnabled")
	);
	private static final SimpleCommandExceptionType ERROR_TEAM_ALREADY_FRIENDLYFIRE_DISABLED = new SimpleCommandExceptionType(
		Component.translatable("commands.team.option.friendlyfire.alreadyDisabled")
	);
	private static final SimpleCommandExceptionType ERROR_TEAM_ALREADY_FRIENDLYINVISIBLES_ENABLED = new SimpleCommandExceptionType(
		Component.translatable("commands.team.option.seeFriendlyInvisibles.alreadyEnabled")
	);
	private static final SimpleCommandExceptionType ERROR_TEAM_ALREADY_FRIENDLYINVISIBLES_DISABLED = new SimpleCommandExceptionType(
		Component.translatable("commands.team.option.seeFriendlyInvisibles.alreadyDisabled")
	);
	private static final SimpleCommandExceptionType ERROR_TEAM_NAMETAG_VISIBLITY_UNCHANGED = new SimpleCommandExceptionType(
		Component.translatable("commands.team.option.nametagVisibility.unchanged")
	);
	private static final SimpleCommandExceptionType ERROR_TEAM_DEATH_MESSAGE_VISIBLITY_UNCHANGED = new SimpleCommandExceptionType(
		Component.translatable("commands.team.option.deathMessageVisibility.unchanged")
	);
	private static final SimpleCommandExceptionType ERROR_TEAM_COLLISION_UNCHANGED = new SimpleCommandExceptionType(
		Component.translatable("commands.team.option.collisionRule.unchanged")
	);

	public static void register(CommandDispatcher<CommandSourceStack> dispatcher, CommandBuildContext context) {
		dispatcher.register(
			Commands.literal("team")
				.requires(commandSourceStack -> commandSourceStack.hasPermission(2))
				.then(
					Commands.literal("list")
						.executes(commandContext -> listTeams(commandContext.getSource()))
						.then(
							Commands.argument("team", TeamArgument.team())
								.executes(commandContext -> listMembers(commandContext.getSource(), TeamArgument.getTeam(commandContext, "team")))
						)
				)
				.then(
					Commands.literal("add")
						.then(
							Commands.argument("team", StringArgumentType.word())
								.executes(commandContext -> createTeam(commandContext.getSource(), StringArgumentType.getString(commandContext, "team")))
								.then(
									Commands.argument("displayName", ComponentArgument.textComponent(context))
										.executes(
											commandContext -> createTeam(
												commandContext.getSource(),
												StringArgumentType.getString(commandContext, "team"),
												ComponentArgument.getResolvedComponent(commandContext, "displayName")
											)
										)
								)
						)
				)
				.then(
					Commands.literal("remove")
						.then(
							Commands.argument("team", TeamArgument.team())
								.executes(commandContext -> deleteTeam(commandContext.getSource(), TeamArgument.getTeam(commandContext, "team")))
						)
				)
				.then(
					Commands.literal("empty")
						.then(
							Commands.argument("team", TeamArgument.team())
								.executes(commandContext -> emptyTeam(commandContext.getSource(), TeamArgument.getTeam(commandContext, "team")))
						)
				)
				.then(
					Commands.literal("join")
						.then(
							Commands.argument("team", TeamArgument.team())
								.executes(
									commandContext -> joinTeam(
										commandContext.getSource(), TeamArgument.getTeam(commandContext, "team"), Collections.singleton(commandContext.getSource().getEntityOrException())
									)
								)
								.then(
									Commands.argument("members", ScoreHolderArgument.scoreHolders())
										.suggests(ScoreHolderArgument.SUGGEST_SCORE_HOLDERS)
										.executes(
											commandContext -> joinTeam(
												commandContext.getSource(),
												TeamArgument.getTeam(commandContext, "team"),
												ScoreHolderArgument.getNamesWithDefaultWildcard(commandContext, "members")
											)
										)
								)
						)
				)
				.then(
					Commands.literal("leave")
						.then(
							Commands.argument("members", ScoreHolderArgument.scoreHolders())
								.suggests(ScoreHolderArgument.SUGGEST_SCORE_HOLDERS)
								.executes(commandContext -> leaveTeam(commandContext.getSource(), ScoreHolderArgument.getNamesWithDefaultWildcard(commandContext, "members")))
						)
				)
				.then(
					Commands.literal("modify")
						.then(
							Commands.argument("team", TeamArgument.team())
								.then(
									Commands.literal("displayName")
										.then(
											Commands.argument("displayName", ComponentArgument.textComponent(context))
												.executes(
													commandContext -> setDisplayName(
														commandContext.getSource(), TeamArgument.getTeam(commandContext, "team"), ComponentArgument.getResolvedComponent(commandContext, "displayName")
													)
												)
										)
								)
								.then(
									Commands.literal("color")
										.then(
											Commands.argument("value", ColorArgument.color())
												.executes(
													commandContext -> setColor(
														commandContext.getSource(), TeamArgument.getTeam(commandContext, "team"), ColorArgument.getColor(commandContext, "value")
													)
												)
										)
								)
								.then(
									Commands.literal("friendlyFire")
										.then(
											Commands.argument("allowed", BoolArgumentType.bool())
												.executes(
													commandContext -> setFriendlyFire(
														commandContext.getSource(), TeamArgument.getTeam(commandContext, "team"), BoolArgumentType.getBool(commandContext, "allowed")
													)
												)
										)
								)
								.then(
									Commands.literal("seeFriendlyInvisibles")
										.then(
											Commands.argument("allowed", BoolArgumentType.bool())
												.executes(
													commandContext -> setFriendlySight(
														commandContext.getSource(), TeamArgument.getTeam(commandContext, "team"), BoolArgumentType.getBool(commandContext, "allowed")
													)
												)
										)
								)
								.then(
									Commands.literal("nametagVisibility")
										.then(
											Commands.literal("never")
												.executes(commandContext -> setNametagVisibility(commandContext.getSource(), TeamArgument.getTeam(commandContext, "team"), Team.Visibility.NEVER))
										)
										.then(
											Commands.literal("hideForOtherTeams")
												.executes(
													commandContext -> setNametagVisibility(
														commandContext.getSource(), TeamArgument.getTeam(commandContext, "team"), Team.Visibility.HIDE_FOR_OTHER_TEAMS
													)
												)
										)
										.then(
											Commands.literal("hideForOwnTeam")
												.executes(
													commandContext -> setNametagVisibility(commandContext.getSource(), TeamArgument.getTeam(commandContext, "team"), Team.Visibility.HIDE_FOR_OWN_TEAM)
												)
										)
										.then(
											Commands.literal("always")
												.executes(commandContext -> setNametagVisibility(commandContext.getSource(), TeamArgument.getTeam(commandContext, "team"), Team.Visibility.ALWAYS))
										)
								)
								.then(
									Commands.literal("deathMessageVisibility")
										.then(
											Commands.literal("never")
												.executes(
													commandContext -> setDeathMessageVisibility(commandContext.getSource(), TeamArgument.getTeam(commandContext, "team"), Team.Visibility.NEVER)
												)
										)
										.then(
											Commands.literal("hideForOtherTeams")
												.executes(
													commandContext -> setDeathMessageVisibility(
														commandContext.getSource(), TeamArgument.getTeam(commandContext, "team"), Team.Visibility.HIDE_FOR_OTHER_TEAMS
													)
												)
										)
										.then(
											Commands.literal("hideForOwnTeam")
												.executes(
													commandContext -> setDeathMessageVisibility(
														commandContext.getSource(), TeamArgument.getTeam(commandContext, "team"), Team.Visibility.HIDE_FOR_OWN_TEAM
													)
												)
										)
										.then(
											Commands.literal("always")
												.executes(
													commandContext -> setDeathMessageVisibility(commandContext.getSource(), TeamArgument.getTeam(commandContext, "team"), Team.Visibility.ALWAYS)
												)
										)
								)
								.then(
									Commands.literal("collisionRule")
										.then(
											Commands.literal("never")
												.executes(commandContext -> setCollision(commandContext.getSource(), TeamArgument.getTeam(commandContext, "team"), Team.CollisionRule.NEVER))
										)
										.then(
											Commands.literal("pushOwnTeam")
												.executes(
													commandContext -> setCollision(commandContext.getSource(), TeamArgument.getTeam(commandContext, "team"), Team.CollisionRule.PUSH_OWN_TEAM)
												)
										)
										.then(
											Commands.literal("pushOtherTeams")
												.executes(
													commandContext -> setCollision(commandContext.getSource(), TeamArgument.getTeam(commandContext, "team"), Team.CollisionRule.PUSH_OTHER_TEAMS)
												)
										)
										.then(
											Commands.literal("always")
												.executes(commandContext -> setCollision(commandContext.getSource(), TeamArgument.getTeam(commandContext, "team"), Team.CollisionRule.ALWAYS))
										)
								)
								.then(
									Commands.literal("prefix")
										.then(
											Commands.argument("prefix", ComponentArgument.textComponent(context))
												.executes(
													commandContext -> setPrefix(
														commandContext.getSource(), TeamArgument.getTeam(commandContext, "team"), ComponentArgument.getResolvedComponent(commandContext, "prefix")
													)
												)
										)
								)
								.then(
									Commands.literal("suffix")
										.then(
											Commands.argument("suffix", ComponentArgument.textComponent(context))
												.executes(
													commandContext -> setSuffix(
														commandContext.getSource(), TeamArgument.getTeam(commandContext, "team"), ComponentArgument.getResolvedComponent(commandContext, "suffix")
													)
												)
										)
								)
						)
				)
		);
	}

	private static Component getFirstMemberName(Collection<ScoreHolder> scores) {
		return ((ScoreHolder)scores.iterator().next()).getFeedbackDisplayName();
	}

	/**
	 * Removes the listed players from their teams.
	 */
	private static int leaveTeam(CommandSourceStack source, Collection<ScoreHolder> players) {
		Scoreboard scoreboard = source.getServer().getScoreboard();

		for (ScoreHolder scoreHolder : players) {
			scoreboard.removePlayerFromTeam(scoreHolder.getScoreboardName());
		}

		if (players.size() == 1) {
			source.sendSuccess(() -> Component.translatable("commands.team.leave.success.single", getFirstMemberName(players)), true);
		} else {
			source.sendSuccess(() -> Component.translatable("commands.team.leave.success.multiple", players.size()), true);
		}

		return players.size();
	}

	private static int joinTeam(CommandSourceStack source, PlayerTeam team, Collection<ScoreHolder> players) {
		Scoreboard scoreboard = source.getServer().getScoreboard();

		for (ScoreHolder scoreHolder : players) {
			scoreboard.addPlayerToTeam(scoreHolder.getScoreboardName(), team);
		}

		if (players.size() == 1) {
			source.sendSuccess(() -> Component.translatable("commands.team.join.success.single", getFirstMemberName(players), team.getFormattedDisplayName()), true);
		} else {
			source.sendSuccess(() -> Component.translatable("commands.team.join.success.multiple", players.size(), team.getFormattedDisplayName()), true);
		}

		return players.size();
	}

	private static int setNametagVisibility(CommandSourceStack source, PlayerTeam team, Team.Visibility visibility) throws CommandSyntaxException {
		if (team.getNameTagVisibility() == visibility) {
			throw ERROR_TEAM_NAMETAG_VISIBLITY_UNCHANGED.create();
		} else {
			team.setNameTagVisibility(visibility);
			source.sendSuccess(
				() -> Component.translatable("commands.team.option.nametagVisibility.success", team.getFormattedDisplayName(), visibility.getDisplayName()), true
			);
			return 0;
		}
	}

	private static int setDeathMessageVisibility(CommandSourceStack source, PlayerTeam team, Team.Visibility visibility) throws CommandSyntaxException {
		if (team.getDeathMessageVisibility() == visibility) {
			throw ERROR_TEAM_DEATH_MESSAGE_VISIBLITY_UNCHANGED.create();
		} else {
			team.setDeathMessageVisibility(visibility);
			source.sendSuccess(
				() -> Component.translatable("commands.team.option.deathMessageVisibility.success", team.getFormattedDisplayName(), visibility.getDisplayName()), true
			);
			return 0;
		}
	}

	private static int setCollision(CommandSourceStack source, PlayerTeam team, Team.CollisionRule rule) throws CommandSyntaxException {
		if (team.getCollisionRule() == rule) {
			throw ERROR_TEAM_COLLISION_UNCHANGED.create();
		} else {
			team.setCollisionRule(rule);
			source.sendSuccess(() -> Component.translatable("commands.team.option.collisionRule.success", team.getFormattedDisplayName(), rule.getDisplayName()), true);
			return 0;
		}
	}

	private static int setFriendlySight(CommandSourceStack source, PlayerTeam team, boolean value) throws CommandSyntaxException {
		if (team.canSeeFriendlyInvisibles() == value) {
			if (value) {
				throw ERROR_TEAM_ALREADY_FRIENDLYINVISIBLES_ENABLED.create();
			} else {
				throw ERROR_TEAM_ALREADY_FRIENDLYINVISIBLES_DISABLED.create();
			}
		} else {
			team.setSeeFriendlyInvisibles(value);
			source.sendSuccess(
				() -> Component.translatable("commands.team.option.seeFriendlyInvisibles." + (value ? "enabled" : "disabled"), team.getFormattedDisplayName()), true
			);
			return 0;
		}
	}

	private static int setFriendlyFire(CommandSourceStack source, PlayerTeam team, boolean value) throws CommandSyntaxException {
		if (team.isAllowFriendlyFire() == value) {
			if (value) {
				throw ERROR_TEAM_ALREADY_FRIENDLYFIRE_ENABLED.create();
			} else {
				throw ERROR_TEAM_ALREADY_FRIENDLYFIRE_DISABLED.create();
			}
		} else {
			team.setAllowFriendlyFire(value);
			source.sendSuccess(
				() -> Component.translatable("commands.team.option.friendlyfire." + (value ? "enabled" : "disabled"), team.getFormattedDisplayName()), true
			);
			return 0;
		}
	}

	private static int setDisplayName(CommandSourceStack source, PlayerTeam team, Component value) throws CommandSyntaxException {
		if (team.getDisplayName().equals(value)) {
			throw ERROR_TEAM_ALREADY_NAME.create();
		} else {
			team.setDisplayName(value);
			source.sendSuccess(() -> Component.translatable("commands.team.option.name.success", team.getFormattedDisplayName()), true);
			return 0;
		}
	}

	private static int setColor(CommandSourceStack source, PlayerTeam team, ChatFormatting value) throws CommandSyntaxException {
		if (team.getColor() == value) {
			throw ERROR_TEAM_ALREADY_COLOR.create();
		} else {
			team.setColor(value);
			source.sendSuccess(() -> Component.translatable("commands.team.option.color.success", team.getFormattedDisplayName(), value.getName()), true);
			return 0;
		}
	}

	private static int emptyTeam(CommandSourceStack source, PlayerTeam team) throws CommandSyntaxException {
		Scoreboard scoreboard = source.getServer().getScoreboard();
		Collection<String> collection = Lists.<String>newArrayList(team.getPlayers());
		if (collection.isEmpty()) {
			throw ERROR_TEAM_ALREADY_EMPTY.create();
		} else {
			for (String string : collection) {
				scoreboard.removePlayerFromTeam(string, team);
			}

			source.sendSuccess(() -> Component.translatable("commands.team.empty.success", collection.size(), team.getFormattedDisplayName()), true);
			return collection.size();
		}
	}

	private static int deleteTeam(CommandSourceStack source, PlayerTeam team) {
		Scoreboard scoreboard = source.getServer().getScoreboard();
		scoreboard.removePlayerTeam(team);
		source.sendSuccess(() -> Component.translatable("commands.team.remove.success", team.getFormattedDisplayName()), true);
		return scoreboard.getPlayerTeams().size();
	}

	private static int createTeam(CommandSourceStack source, String name) throws CommandSyntaxException {
		return createTeam(source, name, Component.literal(name));
	}

	private static int createTeam(CommandSourceStack source, String name, Component displayName) throws CommandSyntaxException {
		Scoreboard scoreboard = source.getServer().getScoreboard();
		if (scoreboard.getPlayerTeam(name) != null) {
			throw ERROR_TEAM_ALREADY_EXISTS.create();
		} else {
			PlayerTeam playerTeam = scoreboard.addPlayerTeam(name);
			playerTeam.setDisplayName(displayName);
			source.sendSuccess(() -> Component.translatable("commands.team.add.success", playerTeam.getFormattedDisplayName()), true);
			return scoreboard.getPlayerTeams().size();
		}
	}

	private static int listMembers(CommandSourceStack source, PlayerTeam team) {
		Collection<String> collection = team.getPlayers();
		if (collection.isEmpty()) {
			source.sendSuccess(() -> Component.translatable("commands.team.list.members.empty", team.getFormattedDisplayName()), false);
		} else {
			source.sendSuccess(
				() -> Component.translatable("commands.team.list.members.success", team.getFormattedDisplayName(), collection.size(), ComponentUtils.formatList(collection)),
				false
			);
		}

		return collection.size();
	}

	private static int listTeams(CommandSourceStack source) {
		Collection<PlayerTeam> collection = source.getServer().getScoreboard().getPlayerTeams();
		if (collection.isEmpty()) {
			source.sendSuccess(() -> Component.translatable("commands.team.list.teams.empty"), false);
		} else {
			source.sendSuccess(
				() -> Component.translatable(
					"commands.team.list.teams.success", collection.size(), ComponentUtils.formatList(collection, PlayerTeam::getFormattedDisplayName)
				),
				false
			);
		}

		return collection.size();
	}

	private static int setPrefix(CommandSourceStack source, PlayerTeam team, Component prefix) {
		team.setPlayerPrefix(prefix);
		source.sendSuccess(() -> Component.translatable("commands.team.option.prefix.success", prefix), false);
		return 1;
	}

	private static int setSuffix(CommandSourceStack source, PlayerTeam team, Component suffix) {
		team.setPlayerSuffix(suffix);
		source.sendSuccess(() -> Component.translatable("commands.team.option.suffix.success", suffix), false);
		return 1;
	}
}