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

const grammarPath = path.join(__dirname, 'lucene.peggy')
const outputPath = path.join(__dirname, 'generated-parser.js')

const grammar = fs.readFileSync(grammarPath, 'utf8')

const parserSource = peggy.generate(grammar, {
  output: 'source',
  format: 'commonjs',
})

const moduleSource = `
const { transformKeyValue, transformExclusion, transformOrGroup, transformKeyValueOrGroup, transformFuzzy } = require('./transform-functions');

${parserSource}

function transformQuery(input) {
    try {
      const parsed = peg$parse(input, {
        transformKeyValue,
        transformExclusion,
        transformOrGroup,
        transformKeyValueOrGroup,
        transformFuzzy,
      })
      return parsed // This would actually involve transforming the parsed structure into a string, omitted for brevity.
    } catch (error) {
      console.error('Parsing error', error)
      return '' // Error handling
    }
}

module.exports = {
  transformQuery
};
`

fs.writeFileSync(outputPath, moduleSource)
console.log(`Parser generated at: ${outputPath}`)