package com.taxes.commands;

import com.taxes.TaxesPlugin;
import com.taxes.tax.Tax;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.command.TabCompleter;
import org.bukkit.entity.Player;
import org.bukkit.util.StringUtil;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class TaxesTabCompleter implements TabCompleter {
   private final TaxesPlugin plugin;

   public TaxesTabCompleter(TaxesPlugin plugin) {
      this.plugin = plugin;
   }

   @Override
   public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
      List<String> completions = new ArrayList<>();

      if (args.length == 1) {
         String cmdName = command.getName().toLowerCase();

         if (cmdName.equals("taxes-collect") || cmdName.equals("tax-collect")) {
            return getAvailableTaxes(sender, args[0], false);
         } else if (cmdName.equals("taxes-info") || cmdName.equals("tax-info")) {
            return getAvailableTaxes(sender, args[0], false);
         } else if (cmdName.equals("taxes-infoall") || cmdName.equals("tax-infoall")) {
            return getAvailableTaxes(sender, args[0], true);
         } else if (cmdName.equals("taxes-list") || cmdName.equals("tax-list")) {
            return Collections.emptyList();
         } else if (cmdName.equals("taxes-listall") || cmdName.equals("tax-listall")) {
            return Collections.emptyList();
         } else if (cmdName.equals("taxes-collectall") || cmdName.equals("tax-collectall")) {
            return Collections.emptyList();
         } else if (cmdName.equals("taxes-reload") || cmdName.equals("tax-reload")) {
            return Collections.emptyList();
         } else if (cmdName.equals("taxes") || cmdName.equals("tax")) {
            return Collections.emptyList();
         }
      }

      return completions;
   }

   /**
    * Gibt alle verfügbaren Steuern für Tab-Completion zurück
    * @param sender Der Command-Sender (Player oder Console)
    * @param input Das aktuelle Input-String für Partial Matching
    * @param showAll Alle Steuern zeigen (true) oder nur aktivierte (false)
    * @return Liste der Steuernamen zum Completen
    */
   private List<String> getAvailableTaxes(CommandSender sender, String input, boolean showAll) {
      List<String> completions = new ArrayList<>();

      for (Tax tax : this.plugin.getTaxConfigData().getTaxes()) {
         // Wenn showAll=false, nur aktivierte Steuern zeigen
         if (!showAll && !tax.getTaxData().isEnabled()) {
            continue;
         }

         String taxName = tax.getTaxData().getName().getConfigTag();
         
         // StringUtil.copyPartialMatches für Partial String Matching
         if (StringUtil.startsWithIgnoreCase(taxName, input)) {
            completions.add(taxName);
         }
      }

      // Alphabetisch sortieren für bessere UX
      Collections.sort(completions);
      return completions;
   }
}