/*
 *   This file is a part of the SteamWar software.
 *
 *   Copyright (C) 2025 SteamWar.de-Serverteam
 *
 *   This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU Affero General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *   GNU Affero General Public License for more details.
 *
 *   You should have received a copy of the GNU Affero General Public License
 *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

package de.steamwar.messages;

import com.velocitypowered.api.command.CommandSource;
import com.velocitypowered.api.event.ResultedEvent;
import com.velocitypowered.api.event.connection.LoginEvent;
import com.velocitypowered.api.proxy.Player;
import com.velocitypowered.api.proxy.ServerConnection;
import de.steamwar.persistent.Subserver;
import de.steamwar.sql.SteamwarUser;
import de.steamwar.sql.UserPerm;
import de.steamwar.velocitycore.VelocityCore;
import de.steamwar.velocitycore.commands.StreamingCommand;
import net.kyori.adventure.text.Component;
import net.kyori.adventure.text.event.ClickEvent;
import net.kyori.adventure.text.event.HoverEvent;
import net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer;
import net.kyori.adventure.text.serializer.plain.PlainTextComponentSerializer;

import java.text.DateFormat;
import java.text.MessageFormat;
import java.util.Date;
import java.util.Locale;
import java.util.ResourceBundle;
import java.util.UUID;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.function.Supplier;
import java.util.stream.Stream;

public interface Chatter {
    LegacyComponentSerializer SERIALIZER = LegacyComponentSerializer.builder().extractUrls().build();

    static Stream<Player> allPlayers() {
        return VelocityCore.getProxy().getAllPlayers().stream();
    }

    static Stream<Chatter> allStream() {
        return Stream.concat(Stream.of(Chatter.console()), allPlayers().map(Chatter::of));
    }

    static ChatterGroup broadcast() {
        return new ChatterGroup(allStream());
    }

    static ChatterGroup globalChat() {
        return new ChatterGroup(Stream.concat(Stream.of(Chatter.console()), allPlayers().filter(player -> {
            Subserver subserver = Subserver.getSubserver(player);
            return !(Subserver.isArena(subserver) && subserver.getServer() == player.getCurrentServer().map(ServerConnection::getServerInfo).orElse(null));
        }).map(Chatter::of)));
    }

    static ChatterGroup serverteam() {
        return new ChatterGroup(allStream()
                .filter(player -> player.user().hasPerm(UserPerm.TEAM))
                .filter(StreamingCommand::isNotStreaming));
    }

    SteamwarUser user();

    Locale getLocale();
    boolean chatShown();
    void sendMessage(Component msg);
    Player getPlayer();

    default <T> T withPlayerOrOffline(Function<Player, T> withPlayer, Supplier<T> withOffline) {
        Player player = getPlayer();
        if(player == null)
            return withOffline.get();
        else
            return withPlayer.apply(player);
    }
    default void withPlayerOrOffline(Consumer<Player> withPlayer, Runnable withOffline) {
        Player player = getPlayer();
        if(player == null) {
            withOffline.run();
        } else {
            withPlayer.accept(player);
        }
    }
    default void withPlayer(Consumer<Player> function) {
        withPlayerOrOffline(function, () -> {});
    }

    default void system(String format, Object... params) {
        system(new Message(format, params));
    }

    default void system(Message message) {
        send(true, null, null, message);
    }

    default void system(String format, Message onHover, ClickEvent onClick, Object... params) {
        send(true, onHover, onClick, new Message(format, params));
    }

    default void prefixless(String format, Object... params) {
        prefixless(format, null, null, params);
    }

    default void prefixless(String format, Message onHover, ClickEvent onClick, Object... params) {
        send(false, onHover, onClick, new Message(format, params));
    }

    default void send(boolean prefixed, Message onHover, ClickEvent onClick, Message message) {
        Component msg = parse(prefixed, message);
        if(onHover != null)
            msg = msg.hoverEvent(HoverEvent.showText(parse(false, onHover)));
        if(onClick != null)
            msg = msg.clickEvent(onClick);
        sendMessage(msg);
    }

    default String parseToPlain(String format, Object... params) {
        return parseToPlain(new Message(format, params));
    }

    default String parseToPlain(Message message) {
        return PlainTextComponentSerializer.plainText().serialize(parse(message));
    }

    default String parseToLegacy(String format, Object... params) {
        return parseToLegacy(new Message(format, params));
    }

    default String parseToLegacy(Message message) {
        return SERIALIZER.serialize(parse(message));
    }

    default Component parse(String format, Object... params) {
        return parse(false, new Message(format, params));
    }

    default Component parse(Message message) {
        return parse(false, message);
    }

    default Component parse(boolean prefixed, String format, Object... params) {
        return parse(prefixed, new Message(format, params));
    }

    default Component parse(boolean prefixed, Message message) {
        Locale locale = getLocale();
        ResourceBundle resourceBundle = SteamwarResourceBundle.getResourceBundle(locale);
        String pattern = "";
        if(prefixed)
            pattern = resourceBundle.getObject("PREFIX") + " ";
        pattern += (String)resourceBundle.getObject(message.format());

        MessageFormat format = new MessageFormat(pattern, locale);
        Object[] params = message.params();
        for (int i = 0; i < params.length; i++) {
            if(params[i] instanceof Message msg) {
                params[i] = parseToLegacy(msg);
            } else if(params[i] instanceof Date date) {
                params[i] = DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT, locale).format(date);
            } else if(params[i] instanceof SteamwarUser user) {
                params[i] = user.getUserName();
            } else if(params[i] instanceof Player player) {
                params[i] = player.getUsername();
            } else if(params[i] instanceof Chatter chatter) {
                params[i] = chatter.user().getUserName();
            } else if(params[i] instanceof Function func) {
                params[i] = func.apply(this);
            }
        }
        return SERIALIZER.deserialize(format.format(params));
    }

    static PlayerChatter of(Player player) {
        return new PlayerChatter(player, player::sendMessage);
    }

    static PlayerChatter disconnect(Player player) {
        return new PlayerChatter(player, player::disconnect);
    }

    static Chatter of(CommandSource sender) {
        if(sender instanceof Player player)
            return of(player);

        //Console
        return new PlayerlessChatter() {
            @Override
            public SteamwarUser user() {
                return SteamwarUser.get(-1);
            }

            @Override
            public boolean chatShown() {
                return true;
            }

            @Override
            public void sendMessage(Component msg) {
                sender.sendMessage(msg);
            }
        };
    }

    static Chatter of(SteamwarUser user) {
        return of(user.getUUID(), false);
    }

    static Chatter of(UUID uuid) {
        return of(uuid, false);
    }

    static Chatter of(UUID uuid, boolean playerlessChatShown) {
        Player player = VelocityCore.getProxy().getPlayer(uuid).orElse(null);
        if(player != null)
            return Chatter.of(player);

        return new PlayerlessChatter() {
            @Override
            public SteamwarUser user() {
                return SteamwarUser.get(uuid);
            }

            @Override
            public boolean chatShown() {
                return playerlessChatShown;
            }

            @Override
            public void sendMessage(Component msg) {
                // Nowhere to send
            }
        };
    }

    static Chatter console() {
        return of(VelocityCore.getProxy().getConsoleCommandSource());
    }

    static Chatter of(LoginEvent event) {
        return new PlayerlessChatter() {
            @Override
            public SteamwarUser user() {
                return SteamwarUser.get(event.getPlayer().getUniqueId());
            }

            @Override
            public boolean chatShown() {
                return false;
            }

            @Override
            public void sendMessage(Component msg) {
                event.setResult(ResultedEvent.ComponentResult.denied(msg));
            }
        };
    }

    abstract class PlayerlessChatter implements Chatter {
        @Override
        public Locale getLocale() {
            return user().getLocale();
        }

        @Override
        public Player getPlayer() {
            return VelocityCore.getProxy().getPlayer(user().getUUID()).orElse(null);
        }
    }
}