content: /*
   * Copyright (c) 2016-2017 Daniel Ennis (Aikar) - MIT License
   *
   *  Permission is hereby granted, free of charge, to any person obtaining
   *  a copy of this software and associated documentation files (the
   *  "Software"), to deal in the Software without restriction, including
   *  without limitation the rights to use, copy, modify, merge, publish,
   *  distribute, sublicense, and/or sell copies of the Software, and to
   *  permit persons to whom the Software is furnished to do so, subject to
   *  the following conditions:
   *
   *  The above copyright notice and this permission notice shall be
   *  included in all copies or substantial portions of the Software.
   *
   *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
   *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
   *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
   *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   */
  
  package co.aikar.commands;
  
  import com.google.common.collect.HashMultimap;
  import com.google.common.collect.SetMultimap;
  import net.kyori.adventure.text.Component;
  import org.spongepowered.api.command.Command;
  import org.spongepowered.api.command.CommandCause;
  import org.spongepowered.api.command.CommandCompletion;
  import org.spongepowered.api.command.CommandResult;
  import org.spongepowered.api.command.exception.CommandException;
  import org.spongepowered.api.command.parameter.ArgumentReader;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Optional;
  import java.util.Set;
  import java.util.stream.Collectors;
  
  import static net.kyori.adventure.text.Component.text;
  
  public class SpongeRootCommand implements Command.Raw, RootCommand {
  
      private final SpongeCommandManager manager;
      private final String name;
      private BaseCommand defCommand;
      private SetMultimap<String, RegisteredCommand> subCommands = HashMultimap.create();
      private List<BaseCommand> children = new ArrayList<>();
      boolean isRegistered = false;
  
      SpongeRootCommand(SpongeCommandManager manager, String name) {
          this.manager = manager;
          this.name = name;
      }
  
      @Override
      public String getCommandName() {
          return name;
      }
  
      private CommandResult executeSponge(CommandIssuer sender, String commandLabel, String[] args) {
          BaseCommand cmd = execute(sender, commandLabel, args);
          SpongeCommandOperationContext lastContext = (SpongeCommandOperationContext) cmd.getLastCommandOperationContext();
          return lastContext != null ? lastContext.getResult() : CommandResult.success();
      }
  
      public void addChild(BaseCommand command) {
          if (this.defCommand == null || !command.subCommands.get(BaseCommand.DEFAULT).isEmpty()) {
              this.defCommand = command;
          }
          addChildShared(this.children, this.subCommands, command);
      }
  
      @Override
      public BaseCommand getDefCommand() {
          return defCommand;
      }
  
      @Override
      public CommandManager getManager() {
          return manager;
      }
  
      @Override
      public SetMultimap<String, RegisteredCommand> getSubCommands() {
          return subCommands;
      }
  
      @Override
      public List<BaseCommand> getChildren() {
          return children;
      }
  
      @Override
      public CommandResult process(CommandCause cause, ArgumentReader.Mutable arguments) throws CommandException {
          String[] args = argToStrlist(arguments);
          return this.executeSponge(manager.getCommandIssuer(cause), this.name, args);
      }
  
      @Override
      public List<CommandCompletion> complete(CommandCause cause, ArgumentReader.Mutable arguments) throws CommandException {
          String[] args = argToStrlist(arguments);
          return getTabCompletions(manager.getCommandIssuer(cause), this.name, args).stream().map(it -> new CommandCompletion() {
              @Override
              public String completion() {
                  return it;
              }
  
              @Override
              public Optional<Component> tooltip() {
                  return Optional.empty();
              }
          }).collect(Collectors.toList());
      }
  
      @Override
      public List<String> getTabCompletions(CommandIssuer sender, String alias, String[] args, boolean commandsOnly, boolean isAsync) {
          Set<String> completions = new HashSet<>();
          getChildren().forEach(child -> {
              if (!commandsOnly) {
                  completions.addAll(child.tabComplete(sender, this, args, isAsync));
              }
              completions.addAll(child.getCommandsForCompletion(sender, args));
          });
  
          return completions.stream()
                  .filter(it -> Arrays
                          .stream(args)
                          .noneMatch(it::equals))
                  .collect(Collectors.toList());
      }
  
      @Override
      public boolean canExecute(CommandCause cause) {
          return this.hasAnyPermission(manager.getCommandIssuer(cause));
      }
  
      @Override
      public Optional<Component> shortDescription(CommandCause cause) {
          String description = getDescription();
          return description != null ? Optional.of(text(description)) : Optional.empty();
      }
  
      @Override
      public Optional<Component> extendedDescription(CommandCause cause) {
          return Optional.empty();
      }
  
      @Override
      public Component usage(CommandCause cause) {
          String usage = getUsage();
          return usage != null ? text(usage) : text("");
      }
  
      private String[] argToStrlist(ArgumentReader.Mutable arguments) {
          return Arrays.stream(arguments.input().split(" "))
                  .filter(string -> (!string.isEmpty()))
                  .toArray(String[]::new);
      }
  }
  