/**
 * 读取根目录下的文本文件
 */

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

const projectRoot = path.resolve(__dirname, '..', '..', '..')

/** 构建绝对路径：绝对路径直接返回，否则相对于 folderPath 或项目根 */
function buildFilePath(filePath, folderPath) {
  if (filePath.startsWith('/') || filePath.includes(':')) return filePath
  return folderPath ? path.join(folderPath, filePath) : filePath
}

function readTextFile(filePath) {
  const fullPath = path.isAbsolute(filePath) ? filePath : path.resolve(projectRoot, filePath)
  const content = fs.readFileSync(fullPath, 'utf8')
  return { success: true, content }
}

/** 执行读取文本文件 */
async function executeReadTxt({ filePath, folderPath }) {
  if (!filePath) return { success: false, error: 'read-txt 缺少 filePath 参数' }
  const absoluteFilePath = buildFilePath(filePath, folderPath)
  const result = readTextFile(absoluteFilePath)
  return { success: true, content: result.content || '' }
}

module.exports = { executeReadTxt, readTextFile }