package ru.nevetime.clientirc;

import net.fabricmc.api.ClientModInitializer;
import net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientLifecycleEvents;
import net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientTickEvents;
import net.fabricmc.fabric.api.client.message.v1.ClientSendMessageEvents;
import net.fabricmc.loader.api.FabricLoader;
import net.minecraft.client.MinecraftClient;
import net.minecraft.text.Text;
import net.minecraft.util.Formatting;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public final class ClientIrcMod implements ClientModInitializer {
    public static final String MOD_ID = "clientirc";
    public static final Logger LOGGER = LoggerFactory.getLogger(MOD_ID);

    private static final String COMMAND_PREFIX = ".irc";

    private static IrcConfig config;
    private static IrcService service;

    @Override
    public void onInitializeClient() {
        config = IrcConfig.load(FabricLoader.getInstance().getConfigDir().resolve("clientirc.json"));
        service = new IrcService(config, LOGGER);

        ClientLifecycleEvents.CLIENT_STARTED.register(client -> {
            if (config.autoConnect) {
                service.connect(resolvePlayerName(client));
            }
        });

        ClientTickEvents.END_CLIENT_TICK.register(client -> {
            IrcService.DisplayLine line;
            while ((line = service.pollLine()) != null) {
                Formatting color = line.system() ? Formatting.GRAY : Formatting.AQUA;
                pushClientChat(client, Text.literal(line.text()).formatted(color));
            }
        });

        ClientSendMessageEvents.ALLOW_CHAT.register(message -> !interceptOutgoingChat(message));
    }

    private static boolean interceptOutgoingChat(String rawMessage) {
        String trimmed = rawMessage.trim();
        if (!trimmed.startsWith(COMMAND_PREFIX)) {
            return false;
        }

        MinecraftClient client = MinecraftClient.getInstance();
        String argument = trimmed.length() == COMMAND_PREFIX.length() ? "" : trimmed.substring(COMMAND_PREFIX.length()).trim();

        if (argument.isBlank()) {
            pushClientChat(client, Text.literal("[IRC] Usage: .irc <message> | .irc status | .irc reconnect | .irc reload").formatted(Formatting.YELLOW));
            return true;
        }

        if ("status".equalsIgnoreCase(argument)) {
            String status = service.isConnected() ? "connected" : "disconnected";
            pushClientChat(client, Text.literal("[IRC] " + status + " | " + config.host + ":" + config.port + " | clientName=" + config.clientName).formatted(Formatting.YELLOW));
            return true;
        }

        if ("reconnect".equalsIgnoreCase(argument)) {
            boolean connected = service.reconnect(resolvePlayerName(client));
            Formatting color = connected ? Formatting.GREEN : Formatting.RED;
            pushClientChat(client, Text.literal("[IRC] reconnect " + (connected ? "ok" : "failed")).formatted(color));
            return true;
        }

        if ("reload".equalsIgnoreCase(argument)) {
            config = IrcConfig.load(FabricLoader.getInstance().getConfigDir().resolve("clientirc.json"));
            service.updateConfig(config);
            pushClientChat(client, Text.literal("[IRC] config reloaded").formatted(Formatting.YELLOW));
            return true;
        }

        if (!service.ensureConnected(resolvePlayerName(client))) {
            pushClientChat(client, Text.literal("[IRC] server is offline or config is wrong").formatted(Formatting.RED));
            return true;
        }

        boolean sent = service.sendChat(resolvePlayerName(client), argument);
        if (!sent) {
            pushClientChat(client, Text.literal("[IRC] send failed").formatted(Formatting.RED));
        }
        return true;
    }

    private static void pushClientChat(MinecraftClient client, Text text) {
        if (client == null) {
            return;
        }
        client.execute(() -> client.inGameHud.getChatHud().addMessage(text));
    }

    private static String resolvePlayerName(MinecraftClient client) {
        if (client != null && client.player != null) {
            return client.player.getGameProfile().getName();
        }
        if (client != null && client.getSession() != null) {
            return client.getSession().getUsername();
        }
        return "unknown";
    }
}