package com.alttd.velocitychat.handlers;

import com.alttd.chat.config.Config;
import com.alttd.chat.database.Queries;
import com.alttd.chat.managers.ChatUserManager;
import com.alttd.chat.managers.PartyManager;
import com.alttd.chat.managers.RegexManager;
import com.alttd.chat.objects.*;
import com.alttd.chat.objects.chat_log.ChatLogHandler;
import com.alttd.chat.objects.chat_log.ChatLogType;
import com.alttd.chat.util.ALogger;
import com.alttd.chat.util.Utility;
import com.alttd.velocitychat.VelocityChat;
import com.google.common.io.ByteArrayDataOutput;
import com.google.common.io.ByteStreams;
import com.velocitypowered.api.command.CommandSource;
import com.velocitypowered.api.proxy.Player;
import com.velocitypowered.api.proxy.ServerConnection;
import net.kyori.adventure.text.Component;
import net.kyori.adventure.text.ComponentLike;
import net.kyori.adventure.text.TextReplacementConfig;
import net.kyori.adventure.text.minimessage.MiniMessage;
import net.kyori.adventure.text.minimessage.tag.resolver.Placeholder;
import net.kyori.adventure.text.minimessage.tag.resolver.TagResolver;
import net.kyori.adventure.text.serializer.gson.GsonComponentSerializer;
import net.kyori.adventure.text.serializer.plain.PlainTextComponentSerializer;
import org.jetbrains.annotations.Nullable;

import java.time.Duration;
import java.util.Date;
import java.util.List;
import java.util.Optional;
import java.util.UUID;

public class ChatHandler {

    private final ChatLogHandler chatLogHandler;

    public ChatHandler(ChatLogHandler chatLogHandler) {
        this.chatLogHandler = chatLogHandler;
    }

    public void privateMessage(String sender, String target, String message) {
        UUID uuid = UUID.fromString(sender);
        ChatUser senderUser = ChatUserManager.getChatUser(uuid);
        Optional<Player> optionalPlayer = VelocityChat.getPlugin().getProxy().getPlayer(uuid);
        if (optionalPlayer.isEmpty()) {
            return;
        }
        Player player = optionalPlayer.get();

        Optional<Player> optionalPlayer2 = VelocityChat.getPlugin().getProxy().getPlayer(target);
        if (optionalPlayer2.isEmpty()) {
            return;
        }
        Player player2 = optionalPlayer2.get();
        ChatUser targetUser = ChatUserManager.getChatUser(player2.getUniqueId());

        TagResolver Placeholders = TagResolver.resolver(
                Placeholder.component("sender", senderUser.getDisplayName()),
                Placeholder.unparsed("sendername", player.getUsername()),
                Placeholder.component("receiver", targetUser.getDisplayName()),
                Placeholder.unparsed("receivername", player2.getUsername()),
                Placeholder.component("message", GsonComponentSerializer.gson().deserialize(message)),
                Placeholder.unparsed("server",
                        player.getCurrentServer().isPresent() ? player.getCurrentServer()
                                .get()
                                .getServerInfo()
                                .getName() : "Altitude"
                )
        );

        ServerConnection serverConnection;
        //Log handled on receiving server since it is only received on one server and that's where the ignore check happens
        if (player.getCurrentServer().isPresent() && player2.getCurrentServer().isPresent()) {
            // redirect to the sender
            serverConnection = player.getCurrentServer().get();
            Component component = Utility.parseMiniMessage(Config.MESSAGESENDER
                    .replaceAll("<sendername>", player.getUsername())
                    .replaceAll("<receivername>", player2.getUsername()), Placeholders
            ).asComponent();
            ByteArrayDataOutput buf = ByteStreams.newDataOutput();
            buf.writeUTF("privatemessageout");
            buf.writeUTF(player.getUniqueId().toString());
            buf.writeUTF(player2.getUsername());
            buf.writeUTF(GsonComponentSerializer.gson().serialize(component));
            buf.writeUTF(player2.getUniqueId().toString());
            serverConnection.sendPluginMessage(VelocityChat.getPlugin().getChannelIdentifier(), buf.toByteArray());

            //redirect to the receiver
            serverConnection = player2.getCurrentServer().get();
            component = Utility.parseMiniMessage(Config.MESSAGERECIEVER
                    .replaceAll("<sendername>", player.getUsername())
                    .replaceAll("<receivername>", player2.getUsername()), Placeholders
            ).asComponent();
            buf = ByteStreams.newDataOutput();
            buf.writeUTF("privatemessagein");
            buf.writeUTF(player2.getUniqueId().toString());
            buf.writeUTF(player.getUsername());
            buf.writeUTF(GsonComponentSerializer.gson().serialize(component));
            buf.writeUTF(player.getUniqueId().toString());
            serverConnection.sendPluginMessage(VelocityChat.getPlugin().getChannelIdentifier(), buf.toByteArray());
        }

    }

    public static void sendBlockedNotification(String prefix, Player player, String input, String target, ServerConnection serverConnection) {
        TagResolver Placeholders = TagResolver.resolver(
                Placeholder.unparsed("prefix", prefix),
                Placeholder.parsed("displayname", Utility.getDisplayName(player.getUniqueId(), player.getUsername())),
                Placeholder.unparsed("target", (target.isEmpty() ? " tried to say: " : " -> " + target + ": ")),
                Placeholder.unparsed("input", input)
        );
        ComponentLike blockedNotification = Utility.parseMiniMessage(Config.NOTIFICATIONFORMAT, Placeholders);

        serverConnection.getServer().getPlayersConnected().forEach(pl -> {
            if (pl.hasPermission("chat.alert-blocked")) {
                pl.sendMessage(blockedNotification);
            }
        });
        player.sendMessage(Utility.parseMiniMessage("<red>The language you used in your message is not allowed, " +
                                                    "this constitutes as your only warning. Any further attempts at bypassing the filter will result in staff intervention.</red>"));
    }

    public void sendPartyMessage(Party party, Component message, @Nullable List<UUID> ignoredPlayers) {
        VelocityChat.getPlugin().getProxy().getAllPlayers().stream()
                .filter(pl -> {
                    UUID uuid = pl.getUniqueId();
                    if (ignoredPlayers != null && ignoredPlayers.contains(uuid)) {
                        return false;
                    }
                    return party.getPartyUsers().stream().anyMatch(pu -> pu.getUuid().equals(uuid));
                }).forEach(pl -> {
                    pl.sendMessage(message);
                    // TODO forward sound to backend server.
                    // https://canary.discord.com/channels/514920774923059209/1020498592219271189
                });
    }

    public void sendPartyMessage(UUID uuid, String message, Component item, ServerConnection serverConnection) {
        Optional<Player> optionalPlayer = VelocityChat.getPlugin().getProxy().getPlayer(uuid);
        if (optionalPlayer.isEmpty()) {
            return;
        }
        Player player = optionalPlayer.get();
        ChatUser user = ChatUserManager.getChatUser(uuid);
        Party party = PartyManager.getParty(user.getPartyId());
        if (party == null) {
            player.sendMessage(Utility.parseMiniMessage(Config.NOT_IN_A_PARTY));
            return;
        }
        ComponentLike senderName = user.getDisplayName();

        TagResolver placeholders = TagResolver.resolver(
                Placeholder.component("sender", senderName),
                Placeholder.component("sendername", senderName),
                Placeholder.unparsed("partyname", party.getPartyName()),
                Placeholder.component("message", parseMessageContent(player, message)),
                Placeholder.unparsed("server", serverConnection.getServer().getServerInfo().getName())
        );

        Component partyMessage = Utility.parseMiniMessage(Config.PARTY_FORMAT, placeholders).asComponent()
                .replaceText(TextReplacementConfig.builder().once().matchLiteral("[i]").replacement(item).build());

        ModifiableString modifiableString = new ModifiableString(partyMessage);
        if (!RegexManager.filterText(player.getUsername(), uuid, modifiableString, "party")) {
            sendBlockedNotification("Party Language", player, message, "", serverConnection);
            return; // the message was blocked
        }

        partyMessage = modifiableString.component();

        sendPartyMessage(party, partyMessage, user.getIgnoredBy());

        chatLogHandler.addChatLog(uuid,
                serverConnection.getServer().getServerInfo().getName(),
                PlainTextComponentSerializer.plainText().serialize(partyMessage),
                ChatLogType.PARTY,
                String.valueOf(party.getPartyId()),
                null,
                partyMessage,
                false
        );

        ComponentLike spyMessage = Utility.parseMiniMessage(Config.PARTY_SPY, placeholders);
        for (Player pl : serverConnection.getServer().getPlayersConnected()) {
            if (pl.hasPermission(Config.SPYPERMISSION) && !party.getPartyUsersUuid().contains(pl.getUniqueId())) {
                pl.sendMessage(spyMessage);
            }
        }
        ALogger.info(PlainTextComponentSerializer.plainText().serialize(partyMessage));
    }

    public void globalAdminChat(String message) {
        Component component = GsonComponentSerializer.gson().deserialize(message);

        VelocityChat.getPlugin().getProxy().getAllPlayers()
                .stream()
                .filter(target -> target.hasPermission("command.chat.globaladminchat"))
                .forEach(target -> target.sendMessage(component));

        chatLogHandler.addChatLog(
                new UUID(0, 0), //No origin uuid for GAC
                "GAC", //No server for GAC
                PlainTextComponentSerializer.plainText().serialize(component),
                ChatLogType.GAC,
                null,
                null,
                component,
                false
        );
    }

    public void globalAdminChat(CommandSource commandSource, String message) {
        ComponentLike senderName = Component.text(Config.CONSOLENAME);
        String serverName = "Altitude";
        if (commandSource instanceof Player sender) {
            ChatUser user = ChatUserManager.getChatUser(sender.getUniqueId());
            if (user == null) {
                return;
            }
            senderName = user.getDisplayName();
            serverName = sender.getCurrentServer().isPresent() ? sender.getCurrentServer()
                    .get()
                    .getServerInfo()
                    .getName() : "Altitude";
        }

        TagResolver Placeholders = TagResolver.resolver(
                Placeholder.component("message", parseMessageContent(commandSource, message)),
                Placeholder.component("sender", senderName),
                Placeholder.unparsed("server", serverName)
        );

        ComponentLike component = Utility.parseMiniMessage(Config.GACFORMAT, Placeholders);

        VelocityChat.getPlugin().getProxy().getAllPlayers()
                .stream()
                .filter(target -> target.hasPermission("command.chat.globaladminchat"))
                .forEach(target -> target.sendMessage(component));
    }

    public void sendMail(CommandSource commandSource, String recipient, String message) {
        UUID uuid = Config.CONSOLEUUID;
        String senderName = Config.CONSOLENAME;
        UUID targetUUID;
        if (commandSource instanceof Player player) {
            uuid = player.getUniqueId();
            senderName = player.getUsername();
        }
        Optional<Player> optionalPlayer = VelocityChat.getPlugin().getProxy().getPlayer(recipient);
        if (optionalPlayer.isEmpty()) {
            targetUUID = ServerHandler.getPlayerUUID(recipient);
            if (targetUUID == null) {
                commandSource.sendMessage(Utility.parseMiniMessage(
                        "<red>A player with this name hasn't logged in recently.")); // TOOD load from config
                return;
            }
        } else {
            targetUUID = optionalPlayer.get().getUniqueId();
        }
        Mail mail = new Mail(targetUUID, uuid, message);
        ChatUser chatUser = ChatUserManager.getChatUser(targetUUID);
        if (chatUser.getIgnoredPlayers().contains(uuid)) {
            commandSource.sendMessage(Utility.parseMiniMessage("<red>You cannot mail this player</red>"));
            return;
        }
        chatUser.addMail(mail);
        // TODO load from config
        String finalSenderName = senderName;
        optionalPlayer.ifPresent(player -> player.sendMessage(Utility.parseMiniMessage("<yellow>New mail from " + finalSenderName)));
        commandSource.sendMessage(Utility.parseMiniMessage("<yellow>Sent mail to " + recipient + "!"));
    }

    public void readMail(CommandSource commandSource, String targetPlayer, String senderPlayer) {
        UUID uuid = ServerHandler.getPlayerUUID(targetPlayer);
        if (uuid == null) {
            commandSource.sendMessage(Utility.parseMiniMessage(Config.mailNoUser));
            return;
        }

        ChatUser chatUser = ChatUserManager.getChatUser(uuid);
        if (senderPlayer == null) {
            commandSource.sendMessage(parseMails(chatUser.getMails(), false));
        }

        UUID sender = ServerHandler.getPlayerUUID(senderPlayer);
        if (sender == null) {
            commandSource.sendMessage(Utility.parseMiniMessage(Config.mailNoUser));
            return;
        }

        List<Mail> mails = chatUser.getMails().stream()
                .filter(mail -> mail.getSender().equals(sender))
                .toList();
        commandSource.sendMessage(parseMails(mails, false));
    }

    public void readMail(CommandSource commandSource, boolean unread) {
        if (commandSource instanceof Player player) {
            ChatUser chatUser = ChatUserManager.getChatUser(player.getUniqueId());
            commandSource.sendMessage(parseMails(unread ? chatUser.getUnReadMail() : chatUser.getMails(), unread));
        }
    }

    private Component parseMails(List<Mail> mails, boolean mark) {
        Component component = Utility.parseMiniMessage(Config.mailHeader).asComponent();
        for (Mail mail : mails) {
            if (mail.isUnRead() && mark) {
                mail.setReadTime(System.currentTimeMillis());
                Queries.markMailRead(mail);
            }
            Date date = new Date(mail.getSendTime());
            ChatUser chatUser = ChatUserManager.getChatUser(mail.getSender());
            TagResolver Placeholders = TagResolver.resolver(
                    Placeholder.component("staffprefix", chatUser.getStaffPrefix()),
                    Placeholder.component("sender", chatUser.getDisplayName()),
                    Placeholder.component("message", Utility.parseMiniMessage(mail.getMessage())),
                    Placeholder.unparsed("date", date.toString()),
                    Placeholder.unparsed("time_ago",
                            getTimeAgo(Duration.between(date.toInstant(), new Date().toInstant()))
                    )
            );
            ComponentLike mailMessage = Utility.parseMiniMessage(Config.mailBody, Placeholders);
            component = component.append(Component.newline()).append(mailMessage);
        }
        component = component.append(Component.newline()).append(Utility.parseMiniMessage(Config.mailFooter));
        return component;
    }

    public void mutePlayer(String uuid, boolean muted) {
        ByteArrayDataOutput buf = ByteStreams.newDataOutput();
        buf.writeUTF("chatpunishments");
        buf.writeUTF(uuid);
        buf.writeBoolean(muted);
    }

    private String getTimeAgo(Duration duration) {
        StringBuilder stringBuilder = new StringBuilder();
        if (duration.toDays() != 0) {
            stringBuilder.append(duration.toDays()).append("d ");
        }
        if (duration.toHoursPart() != 0 || !stringBuilder.isEmpty()) {
            stringBuilder.append(duration.toHoursPart()).append("h ");
        }
        stringBuilder.append(duration.toMinutesPart()).append("m ago");
        return stringBuilder.toString();
    }

    private Component parseMessageContent(CommandSource source, String rawMessage) {
        TagResolver.Builder tagResolver = TagResolver.builder();

        Utility.formattingPerms.forEach((perm, pair) -> {
            if (source.hasPermission(perm)) {
                tagResolver.resolver(pair.getX());
            }
        });

        MiniMessage miniMessage = MiniMessage.builder().tags(tagResolver.build()).build();
        Component component = miniMessage.deserialize(rawMessage);
        for (ChatFilter chatFilter : RegexManager.getEmoteFilters()) {
            component = component.replaceText(
                    TextReplacementConfig.builder()
                            .times(Config.EMOTELIMIT)
                            .match(chatFilter.getRegex())
                            .replacement(chatFilter.getReplacement()).build());
        }

        return component;

    }
}