// states/HandleChat.js
const path = require('path');
const fs = require('fs');
const { getLastChat, getBot, getDB, setActiveTask, clearActiveTask } = require('../core/context');
const { logChatMessage } = require('../memory/chat');
const { chatWithAI } = require('../lib/ai-helper');
const config = require('../config.json');

module.exports = async function HandleChat() {
  const bot = getBot();
  const db = getDB();
  const { username, message } = getLastChat();
  const msg = message.toLowerCase();

  console.log(`[STATE] HandleChat: ${message}`);
  logChatMessage(db, username, message);

  const taskDir = path.join(__dirname, '../bot-tasks');
  const availableTasks = fs.readdirSync(taskDir)
    .filter(f => f.endsWith('.js'))
    .map(f => f.replace('.js', ''));

  const matchedTask = availableTasks.find(task => msg.includes(task.replace(/-/g, ' ')));

  if (matchedTask) {
    try {
      const task = require(path.join(taskDir, matchedTask));
      setActiveTask(matchedTask);
      bot.chat(`Okay, I’ll try to ${matchedTask.replace(/-/g, ' ')}.`);
      await task(bot, db, bot.chat);
      clearActiveTask();
      return;
    } catch (err) {
      console.error(`[TASK ERROR] ${matchedTask}:`, err.message);
      bot.chat(`I couldn't complete the task "${matchedTask}".`);
      clearActiveTask();
      return;
    }
  }

  const prompt = `Player said: "${message}". What task name should I execute (like 'find-flower', 'move-items')? Reply only with the task name or "none".`;
  const aiResponse = await chatWithAI(prompt, config.ai);
  const aiTask = aiResponse.trim().toLowerCase().replace(/\s+/g, '-');

  if (aiTask !== 'none') {
    const taskPath = path.join(taskDir, `${aiTask}.js`);

    if (!fs.existsSync(taskPath)) {
      bot.chat(`I don’t know how to ${aiTask.replace(/-/g, ' ')} yet, learning now...`);

      const templatePath = path.join(__dirname, '../bot-tasks/TaskTemplate.js');
      if (fs.existsSync(templatePath)) {
        let template = fs.readFileSync(templatePath, 'utf8');
        template = template.replace(/task-template/g, aiTask);
        fs.writeFileSync(taskPath, template);
        console.log(`[AI] Task file generated from template: ${taskPath}`);

        // Ask AI to overwrite it with real logic
        const taskPrompt = `
          You are a Mineflayer bot assistant. Generate a new Node.js module for this task:

          Task name: "${aiTask}"

          Use this exact export:
          module.exports = async function(bot, db, say) { ... }

          Use valid Mineflayer APIs. Do NOT use bot.inventory.find(). Use bot.inventory.items().
          This task should do what the player just asked: "${message}"

          Only return valid code. No markdown. No explanation.
        `.trim();

        const aiCode = await chatWithAI(taskPrompt, config.ai);
        if (aiCode.includes('module.exports')) {
          fs.writeFileSync(taskPath, aiCode.trim());
          console.log(`[AI] Task file overwritten with AI code: ${taskPath}`);
        } else {
          console.warn(`[AI] Failed to get valid task code from model. Keeping the template.`);
        }
      } else {
        bot.chat(`Template not found. Cannot learn the task.`);
        return;
      }
    }

    try {
      const task = require(taskPath);
      setActiveTask(aiTask);
      await task(bot, db, bot.chat);
      clearActiveTask();
      return;
    } catch (err) {
      console.error(`[TASK ERROR - AI GENERATED] ${aiTask}:`, err.message);
      bot.chat(`I tried to learn how to ${aiTask.replace(/-/g, ' ')}, but it didn’t work.`);
      clearActiveTask();
      return;
    }
  }

  if (msg.includes(bot.username.toLowerCase())) {
    const response = await chatWithAI(message, config.ai);
    bot.chat(response);
  }
};