/******************************************************************************
 * Multiverse 2 Copyright (c) the Multiverse Team 2011.                       *
 * Multiverse 2 is licensed under the BSD License.                            *
 * For more information please check the README.md file included              *
 * with this project.                                                         *
 ******************************************************************************/

package com.onarandombox.MultiverseCore.commandsold;

import com.onarandombox.MultiverseCore.MultiverseCore;
import com.onarandombox.MultiverseCore.api.MultiverseWorld;
import com.onarandombox.MultiverseCore.display.ContentDisplay;
import com.onarandombox.MultiverseCore.display.filters.ContentFilter;
import com.onarandombox.MultiverseCore.display.filters.DefaultContentFilter;
import com.onarandombox.MultiverseCore.display.filters.RegexContentFilter;
import com.onarandombox.MultiverseCore.display.handlers.PagedSendHandler;
import com.onarandombox.MultiverseCore.display.parsers.ContentParser;
import org.bukkit.ChatColor;
import org.bukkit.World;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.permissions.PermissionDefault;
import org.jetbrains.annotations.NotNull;

import java.util.List;

/**
 * Displays a listing of all worlds that a player can enter.
 */
public class ListCommand extends MultiverseCommand {

    public ListCommand(MultiverseCore plugin) {
        super(plugin);
        this.setName("World Listing");
        this.setCommandUsage("/mv list [filter] [page]");
        this.setArgRange(0, 2);
        this.addKey("mvlist");
        this.addKey("mvl");
        this.addKey("mv list");
        this.setPermission("multiverse.core.list.worlds", "Displays a listing of all worlds that you can enter.", PermissionDefault.OP);
    }

    @Override
    public void runCommand(CommandSender sender, List<String> args) {
        ContentFilter filter = DefaultContentFilter.getInstance();
        int page = 1;

        // Either page or filter.
        if (args.size() == 1) {
            try {
                page = Integer.parseInt(args.get(0));
            } catch (NumberFormatException ignore) {
                filter = RegexContentFilter.fromString(args.get(0));
            }
        }

        // Filter then page.
        if (args.size() == 2) {
            filter = RegexContentFilter.fromString(args.get(0));
            try {
                page = Integer.parseInt(args.get(1));
            } catch (NumberFormatException ignore) {
                sender.sendMessage(ChatColor.RED + args.get(1) + " is not valid number!");
            }
        }

        ContentDisplay.create()
                .addContentParser(new WorldListContentParser())
                .withSendHandler(PagedSendHandler.create()
                        .withHeader("%s====[ Multiverse World List ]====", ChatColor.GOLD)
                        .withFilter(filter)
                        .withTargetPage(page))
                .send(sender);
    }

    private class WorldListContentParser implements ContentParser {

        @Override
        public void parse(@NotNull CommandSender sender, @NotNull List<String> content) {
            Player player = (sender instanceof Player) ? (Player) sender : null;

            plugin.getMVWorldManager().getMVWorlds().stream()
                    .filter(world -> player == null || plugin.getMVPerms().canEnterWorld(player, world))
                    .filter(world -> canSeeWorld(player, world))
                    .map(world -> hiddenText(world) + world.getColoredWorldString() + " - " + parseColouredEnvironment(world.getEnvironment()))
                    .forEach(content::add);

            plugin.getMVWorldManager().getUnloadedWorlds().stream()
                    .filter(world -> plugin.getMVPerms().hasPermission(sender, "multiverse.access." + world, true))
                    .map(world -> ChatColor.GRAY + world + " - UNLOADED")
                    .forEach(content::add);
        }

        private boolean canSeeWorld(Player player, MultiverseWorld world) {
            return !world.isHidden()
                    || player == null
                    || plugin.getMVPerms().hasPermission(player, "multiverse.core.modify", true);
        }

        private String hiddenText(MultiverseWorld world) {
            return (world.isHidden()) ? String.format("%s[H] ", ChatColor.GRAY) : "";
        }

        private String parseColouredEnvironment(World.Environment env) {
            ChatColor color = ChatColor.GOLD;
            switch (env) {
                case NETHER:
                    color = ChatColor.RED;
                    break;
                case NORMAL:
                    color = ChatColor.GREEN;
                    break;
                case THE_END:
                    color = ChatColor.AQUA;
                    break;
            }
            return color + env.toString();
        }
    }
}