#!/usr/bin/env node

/**
 * bootstrap.js - MetaCraft 自举循环入口
 *
 * 1. 读取待办任务列表
 * 2. 显示可选任务
 * 3. 执行选中的任务（调用对应prompt）
 * 4. 验证结果并更新任务状态
 */

const fs = require('fs');
const path = require('path');
const readline = require('readline');

const TODO_FILE = path.join(__dirname, '../meta/todo.md');
const PROMPTS_DIR = path.join(__dirname, '../prompts');

// 解析待办任务文件
function parseTodo(content) {
  const lines = content.split('\n');
  const tasks = [];
  let currentCategory = '';

  for (const line of lines) {
    const categoryMatch = line.match(/^##\s+(.+)/);
    if (categoryMatch) {
      currentCategory = categoryMatch[1].trim();
      continue;
    }

    const taskMatch = line.match(/^- \[( |x)\]\s+(.+)/);
    if (taskMatch) {
      const checked = taskMatch[1] === 'x';
      const description = taskMatch[2].trim();
      tasks.push({
        category: currentCategory,
        description,
        checked,
        raw: line
      });
    }
  }

  return tasks;
}

// 更新待办任务文件
function updateTodo(tasks, updatedTask) {
  // 简化的实现：找到对应行并替换
  const content = fs.readFileSync(TODO_FILE, 'utf-8');
  const lines = content.split('\n');
  for (let i = 0; i < lines.length; i++) {
    if (lines[i].includes(updatedTask.description)) {
      const newLine = lines[i].replace('- [ ]', '- [x]');
      lines[i] = newLine;
      break;
    }
  }
  fs.writeFileSync(TODO_FILE, lines.join('\n'), 'utf-8');
}

// 查找对应prompt文件
function findPromptForTask(task) {
  // 简单映射：将任务描述转换为文件名
  const name = task.description
    .toLowerCase()
    .replace(/[^\w\s]/g, '')
    .replace(/\s+/g, '-');
  const possiblePaths = [
    path.join(PROMPTS_DIR, `${name}.md`),
    path.join(PROMPTS_DIR, `implement-${name}.md`),
    path.join(PROMPTS_DIR, `task-${name}.md`)
  ];

  for (const p of possiblePaths) {
    if (fs.existsSync(p)) {
      return p;
    }
  }
  return null;
}

async function main() {
  console.log('🚀 MetaCraft 自举循环启动\n');

  if (!fs.existsSync(TODO_FILE)) {
    console.error('❌ 待办任务文件不存在：', TODO_FILE);
    process.exit(1);
  }

  const todoContent = fs.readFileSync(TODO_FILE, 'utf-8');
  const tasks = parseTodo(todoContent);
  const pendingTasks = tasks.filter(t => !t.checked);

  if (pendingTasks.length === 0) {
    console.log('🎉 所有任务已完成！');
    return;
  }

  console.log('📋 待办任务列表：');
  pendingTasks.forEach((task, index) => {
    console.log(`  ${index + 1}. [${task.category}] ${task.description}`);
  });

  const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
  });

  function askQuestion(query) {
    return new Promise(resolve => {
      rl.question(query, answer => {
        resolve(answer);
      });
    });
  }

  const answer = await askQuestion('\n请输入要执行的任务编号（或按回车跳过）：');
  rl.close();

  if (!answer.trim()) {
    console.log('⏭️  跳过任务选择');
    return;
  }

  const taskIndex = parseInt(answer) - 1;
  if (isNaN(taskIndex) || taskIndex < 0 || taskIndex >= pendingTasks.length) {
    console.error('❌ 无效的选择');
    process.exit(1);
  }

  const selectedTask = pendingTasks[taskIndex];
  console.log(`\n🎯 选中任务：${selectedTask.description}`);

  const promptPath = findPromptForTask(selectedTask);
  if (!promptPath) {
    console.error(`❌ 未找到对应prompt文件，请在 ${PROMPTS_DIR} 中创建。`);
    console.log('提示：prompt文件名应与任务描述相关，如 "implement-prompt-engine.md"');
    return;
  }

  console.log(`📄 找到prompt文件：${promptPath}`);

  // 执行prompt
  const { main: runPrompt } = require('./run-prompt');
  await runPrompt([promptPath]);

  // 询问是否标记为完成
  const confirm = await new Promise(resolve => {
    const confirmRl = readline.createInterface({
      input: process.stdin,
      output: process.stdout
    });
    confirmRl.question('\n✅ 任务是否已完成？(y/n) ', answer => {
      confirmRl.close();
      resolve(answer.toLowerCase() === 'y');
    });
  });

  if (confirm) {
    updateTodo(tasks, selectedTask);
    console.log('📝 已更新待办任务状态');
  } else {
    console.log('⚠️  任务状态未更新，请手动处理');
  }
}

if (require.main === module) {
  main().catch(err => {
    console.error('自举循环错误：', err);
    process.exit(1);
  });
}

module.exports = { parseTodo, findPromptForTask };