package com.massivecraft.factions.cmd;

import com.massivecraft.factions.Conf;
import com.massivecraft.factions.Faction;
import com.massivecraft.factions.Factions;
import com.massivecraft.factions.FactionsPlugin;
import com.massivecraft.factions.struct.Permission;
import com.massivecraft.factions.zcore.util.TL;
import com.massivecraft.factions.zcore.util.TagUtil;

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


public class CmdList extends FCommand {

     private String[] defaults = new String[3];

     public CmdList() {
          super();
          this.aliases.add("list");
          this.aliases.add("ls");

          // default values in case user has old config
          defaults[0] = "&e&m----------&r&e[ &2Faction List &9{pagenumber}&e/&9{pagecount} &e]&m----------";
          defaults[1] = "<i>Factionless<i> {factionless} online";
          defaults[2] = "<a>{faction} <i>{online} / {members} online, <a>Land / Power / Maxpower: <i>{chunks}/{power}/{maxPower}";

          //this.requiredArgs.add("");
          this.optionalArgs.put("page", "1");

          this.requirements = new CommandRequirements.Builder(Permission.LIST)
                  .playerOnly()
                  .build();
     }

     @Override
     public void perform(CommandContext context) {
          // if economy is enabled, they're not on the bypass list, and this command has a cost set, make 'em pay
          if (!context.payForCommand(Conf.econCostList, "to list the factions", "for listing the factions"))
               return;

          ArrayList<Faction> factionList = Factions.getInstance().getAllFactions();
          factionList.remove(Factions.getInstance().getWilderness());
          factionList.remove(Factions.getInstance().getSafeZone());
          factionList.remove(Factions.getInstance().getWarZone());

          // remove exempt factions
          if (context.fPlayer != null && context.fPlayer.getPlayer() != null && !context.fPlayer.getPlayer().hasPermission("factions.show.bypassexempt")) {
               List<String> exemptFactions = FactionsPlugin.getInstance().getConfig().getStringList("show-exempt");

               factionList.removeIf(next -> exemptFactions.contains(next.getTag()));
          }

          // Sort by total followers first
          factionList.sort((f1, f2) -> {
               int f1Size = f1.getFPlayers().size();
               int f2Size = f2.getFPlayers().size();
               if (f1Size < f2Size) {
                    return 1;
               } else if (f1Size > f2Size) {
                    return -1;
               }
               return 0;
          });

          // Then sort by how many members are online now
          factionList.sort((f1, f2) -> {
               int f1Size = f1.getFPlayersWhereOnline(true).size();
               int f2Size = f2.getFPlayersWhereOnline(true).size();
               if (f1Size < f2Size) {
                    return 1;
               } else if (f1Size > f2Size) {
                    return -1;
               }
               return 0;
          });

          ArrayList<String> lines = new ArrayList<>();

          factionList.add(0, Factions.getInstance().getWilderness());

          final int pageheight = 9;
          int pagenumber = context.argAsInt(0, 1);
          int pagecount = (factionList.size() / pageheight) + 1;
          if (pagenumber > pagecount) {
               pagenumber = pagecount;
          } else if (pagenumber < 1) {
               pagenumber = 1;
          }
          int start = (pagenumber - 1) * pageheight;
          int end = start + pageheight;
          if (end > factionList.size()) {
               end = factionList.size();
          }


          String header = FactionsPlugin.getInstance().getConfig().getString("list.header", defaults[0]);
          header = header.replace("{pagenumber}", String.valueOf(pagenumber)).replace("{pagecount}", String.valueOf(pagecount));
          lines.add(FactionsPlugin.getInstance().txt.parse(header));

          for (Faction faction : factionList.subList(start, end)) {
               if (faction.isWilderness()) {
                    lines.add(FactionsPlugin.getInstance().txt.parse(TagUtil.parsePlain(faction, FactionsPlugin.getInstance().getConfig().getString("list.factionless", defaults[1]))));
                    continue;
               }
               lines.add(FactionsPlugin.getInstance().txt.parse(TagUtil.parsePlain(faction, context.fPlayer, FactionsPlugin.getInstance().getConfig().getString("list.entry", defaults[2]))));
          }
          context.sendMessage(lines);
     }

     @Override
     public TL getUsageTranslation() {
          return TL.COMMAND_LIST_DESCRIPTION;
     }
}