package dev.plutorocks.mixin;

import dev.plutorocks.PlutoBridge;
import net.minecraft.client.MinecraftClient;
import net.minecraft.client.gui.screen.ChatScreen;
import net.minecraft.text.MutableText;
import net.minecraft.text.Text;
import net.minecraft.util.Formatting;
import org.spongepowered.asm.mixin.Mixin;
import org.spongepowered.asm.mixin.injection.At;
import org.spongepowered.asm.mixin.injection.Inject;
import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;

@Mixin(ChatScreen.class)
public abstract class ChatScreenMixin {

    @Inject(method = "sendMessage", at = @At("HEAD"), cancellable = true)
    private void bridge$interceptBridgeMessages(String chatText, boolean addToHistory, CallbackInfo ci) {
        if (chatText == null) {
            return;
        }

        String trimmed = chatText.trim();
        if (trimmed.isEmpty()) {
            return;
        }

        if (trimmed.startsWith("/")) {
            return;
        }

        boolean startsWithBang = trimmed.startsWith("!");
        boolean bridgeDefault = PlutoBridge.bridgeChatDefault;

        boolean wantsBridge;
        if (!bridgeDefault) {
            if (!startsWithBang) {
                return;
            }
            wantsBridge = true;
        } else {
            wantsBridge = !startsWithBang;
        }

        MinecraftClient client = MinecraftClient.getInstance();
        if (client == null || client.player == null) {
            return;
        }

        if (PlutoBridge.BRIDGE_CLIENT == null || !PlutoBridge.BRIDGE_CLIENT.isConnected()) {
            if (wantsBridge) {
                if (client.inGameHud != null) {
                    MutableText prefix = Text.literal("[Bridge] ").formatted(Formatting.AQUA);
                    MutableText body = Text.literal("Not connected. Use /bridge connect first.")
                            .formatted(Formatting.GRAY);
                    client.inGameHud.getChatHud().addMessage(prefix.append(body));
                }
                ci.cancel();
            }
            return;
        }

        // at this point we are connected.
        if (bridgeDefault && startsWithBang && !wantsBridge) {
            // bridge mode ON and user prefixed with "!" => send to normal chat.
            String normalMessage = trimmed.substring(1);
            if (!normalMessage.isEmpty()) {
                client.player.networkHandler.sendChatMessage(normalMessage);
            }
        } else {
            // send to the bridge.
            String bridgeMessage;
            if (!bridgeDefault) {
                // default mode: strip the leading "!" for bridge messages.
                bridgeMessage = trimmed.substring(1);
            } else {
                // bridge mode: already without prefix for bridge messages.
                bridgeMessage = trimmed;
            }

            // enforce max message length client-side to match server.
            int len = bridgeMessage.codePointCount(0, bridgeMessage.length());
            if (len > PlutoBridge.MAX_MESSAGE_LEN) {
                if (client.inGameHud != null) {
                    MutableText prefix = Text.literal("[Bridge] ").formatted(Formatting.AQUA);
                    MutableText body = Text.literal(
                            "Message too long (max " + PlutoBridge.MAX_MESSAGE_LEN + " characters)."
                    ).formatted(Formatting.GRAY);
                    client.inGameHud.getChatHud().addMessage(prefix.append(body));
                }
                ci.cancel();
                return;
            }

            if (!bridgeMessage.isEmpty()) {
                PlutoBridge.BRIDGE_CLIENT.sendChatMessage(bridgeMessage);
            }
        }

        // prevent this message from going to normal MC chat
        ci.cancel();
    }
}