var regedit = require('regedit')
var key = 'HKCU\\Software\\Mozilla\\NativeMessagingHosts\\scuttleshell'
var fs = require("fs")

function check() {

  if (process.platform !== "win32") {
    console.log("This script works only on windows")
    process.exit(1)
  }

  regedit.list(key, (err, results) => {
    if (err) {
      console.log(`[ERROR] Registry key: ${key} doesn't exist\n\nTry: npm run setup-win\n`)
      process.exit(1)
    }

    let manifestPath = results[key].values[""].value

    if (!fs.existsSync(manifestPath)) {
      console.log("[ERROR] App manifest not found at declared location", manifestPath)
      console.log("\nTry: npm run setup-win\n")
      process.exit(1)
    }

    console.log("[INFO] App manifest path location:", manifestPath)

    let manifest = JSON.parse(fs.readFileSync(manifestPath))

    let applicationLauncherPath = manifest.path

    if (!fs.existsSync(applicationLauncherPath)) {
      console.log("[ERROR] Launcher not found at declared location", applicationLauncherPath)
      console.log("\nTry: npm run setup-win\n")
      process.exit(1)
    }

    console.log("[OK] Configuration appears correct\n[INFO] App located at:", applicationLauncherPath)

    process.exit(0)
  })

}


module.exports = check

if (require.main === module) {
  var errorLevel = check()
}