import GameStateManager from './GameStateManager.js';
import { buildPrompt } from './PromptCompressor.js';

/**
 * Extracts the first JSON code block from a string.
 * @param {string} text The text to search.
 * @returns {object|null} The parsed JSON object or null if not found.
 */
function extractJson(text) {
    const match = /```json\n([\s\S]+?)\n```/.exec(text);
    if (match && match[1]) {
        try {
            return JSON.parse(match[1]);
        } catch (error) {
            console.error('RTS-Mode: Failed to parse JSON from LLM response.', error);
            return null;
        }
    }
    return null;
}

/**
 * Sends the user's command to the LLM and processes the turn.
 * @param {string} userCmd The user's command.
 */
export async function sendTurn(userCmd) {
    try {
        const stateJSON = GameStateManager.toCompressedJSON();
        const prompt = buildPrompt(stateJSON, userCmd);

        // Using SillyTavern's built-in LLM broker
        const reply = await window.LLMBroker.generate(prompt);

        if (!reply) {
            throw new Error('LLM returned an empty response.');
        }

        const diff = extractJson(reply);
        if (diff) {
            GameStateManager.applyDiff(diff);
            // For now, log the narrative part to the console.
            const narrative = reply.replace(/```json\n[\s\S]+?\n```/, '').trim();
            console.log('RTS Narrative:', narrative);
        } else {
            console.warn('RTS-Mode: No valid JSON diff found in LLM response.');
            // Log the raw reply for debugging.
            console.log('Raw LLM Response:', reply);
        }
    } catch (error) {
        console.error('RTS-Mode: Error during sendTurn:', error);
        // Optionally, display an alert to the user.
        alert(`RTS-Mode Error: ${error.message}`);
    }
}