const doctrine = require('doctrine')

const getJsHeadComment = (content) => {
 if (content.startsWith('/**')) {
 const comment = content.match(/^[\/\*\*]([\s\S]*?[\@rulesName][\s\S]*?)\*\//)
 if (comment) {
 return comment[0]
 }
 }
 return ""
}

const parseCommentToAst = (comment) => {
 const ast = doctrine.parse(comment, { unwrap: true })
 let docInfo = {} 
 ast.tags.forEach(item => {
 docInfo[item.title] = item.description
 })
 return docInfo
}

const parseComment = (content) => {
 const comment = getJsHeadComment(content)
 if(comment){
 return parseCommentToAst(comment)
 } else {
 return ""
 }
}

module.exports = {
 parseComment
}