import resolve check

#!/usr/bin/env node

const path = require('path')
const exec = require('child_process').exec
const cmd = `ag "import .* from '" -G "${process.argv[2] || 'lib/'}" --nogroup | sed -e "s/:.*from//g" -e "s/'//g" | sed "s/^\\(.*\\.js\\) \\(.*\\)$/\\1 \\2/"`

exec(cmd, (error, stdout, stderr) => {
  if (error) {
    console.error('Error ocurred:', error)
  } else {
    const output = stdout.trim()
    if (output.length === 0) process.exit(0)
    const lines = stdout.trim().split('\n')

    Promise.all(lines.map((line, index, lines) => {
      const [requiringFile, modulePath] = line.trim().split(' ')
      return isValidPath(requiringFile, modulePath)
      // checkResolve(requiringFile, modulePath)
    }))
    .then(results => {
      results.forEach(({ isValid, requiringFile, modulePath, fullModulePath }, index, lines) => {
        if (!isValid) {
          console.error(`\nBad import "${modulePath}" in "${requiringFile}"\n    could not resolve "${fullModulePath}"`)
        }
      })
    })
  }
})

function isValidPath (requiringFile, modulePath) {
  const requiringDir = path.join(requiringFile, '..')
  const isModuleRelative = modulePath.startsWith('.')
  const fullModulePath = isModuleRelative ? path.resolve(requiringDir, modulePath) : modulePath

  const isTestsPath = modulePath.startsWith('tests/')
  const isLoader = modulePath.endsWith('!')
  const data = { requiringFile, modulePath, fullModulePath, isValid: isTestsPath || isLoader }

  if (data.isValid) return Promise.resolve(data)

  return new Promise((resolve, reject) => {
    try {
      require.resolve(fullModulePath)
      data.isValid = true
      resolve(data)
    } catch (e) {
      data.isValid = false
      resolve(data)
    }
  })
}