const util = require('util')
const log = require('npmlog')
const semver = require('semver')
const pack = require('libnpmpack')
const libpub = require('libnpmpublish').publish
const runScript = require('@npmcli/run-script')
const pacote = require('pacote')
const npa = require('npm-package-arg')
const npmFetch = require('npm-registry-fetch')

const npm = require('./npm.js')
const output = require('./utils/output.js')
const otplease = require('./utils/otplease.js')
const { getContents, logTar } = require('./utils/tar.js')

// this is the only case in the CLI where we use the old full slow
// 'read-package-json' module, because we want to pull in all the
// defaults and metadata, like git sha's and default scripts and all that.
const readJson = util.promisify(require('read-package-json'))

const usageUtil = require('./utils/usage.js')
const usage = usageUtil('publish',
  'npm publish [<folder>] [--tag <tag>] [--access <public|restricted>] [--dry-run]' +
  '\n\nPublishes \'.\' if no argument supplied' +
  '\nSets tag `latest` if no --tag specified')

const cmd = (args, cb) => publish(args).then(() => cb()).catch(cb)

const publish = async args => {
  if (args.length === 0)
    args = ['.']
  if (args.length !== 1)
    throw usage

  log.verbose('publish', args)

  const opts = { ...npm.flatOptions }
  const { json, defaultTag } = opts

  if (semver.validRange(defaultTag))
    throw new Error('Tag name must not be a valid SemVer range: ' + defaultTag.trim())

  const tarball = await publish_(args[0], opts)
  const silent = log.level === 'silent'
  if (!silent && json)
    output(JSON.stringify(tarball, null, 2))
  else if (!silent)
    output(`+ ${tarball.id}`)

  return tarball
}

// if it's a directory, read it from the file system
// otherwise, get the full metadata from whatever it is
const getManifest = (spec, opts) =>
  spec.type === 'directory' ? readJson(`${spec.fetchSpec}/package.json`)
  : pacote.manifest(spec, { ...opts, fullMetadata: true })

// for historical reasons, publishConfig in package.json can contain
// ANY config keys that npm supports in .npmrc files and elsewhere.
// We *may* want to revisit this at some point, and have a minimal set
// that's a SemVer-major change that ought to get a RFC written on it.
const { flatten } = require('./utils/flat-options.js')
const publishConfigToOpts = publishConfig =>
  // create a new object that inherits from the config stack
  // then squash the css-case into camelCase opts, like we do
  flatten(Object.assign(Object.create(npm.config.list[0]), publishConfig))

const publish_ = async (arg, opts) => {
  const { unicode, dryRun, json } = opts
  // you can publish name@version, ./foo.tgz, etc.
  // even though the default is the 'file:.' cwd.
  const spec = npa(arg)

  let manifest = await getManifest(spec, opts)

  if (manifest.publishConfig)
    Object.assign(opts, publishConfigToOpts(manifest.publishConfig))

  // only run scripts for directory type publishes
  if (spec.type === 'directory') {
    await runScript({
      event: 'prepublishOnly',
      path: spec.fetchSpec,
      stdio: 'inherit',
      pkg: manifest,
      banner: log.level !== 'silent',
    })
  }

  const tarballData = await pack(spec, opts)
  const pkgContents = await getContents(manifest, tarballData)

  // The purpose of re-reading the manifest is in case it changed,
  // so that we send the latest and greatest thing to the registry
  // note that publishConfig might have changed as well!
  manifest = await getManifest(spec, opts)
  if (manifest.publishConfig)
    Object.assign(opts, publishConfigToOpts(manifest.publishConfig))

  // note that logTar calls npmlog.notice(), so if we ARE in silent mode,
  // this will do nothing, but we still want it in the debuglog if it fails.
  if (!json)
    logTar(pkgContents, { log, unicode })

  if (!dryRun) {
    const resolved = npa.resolve(manifest.name, manifest.version)
    const registry = npmFetch.pickRegistry(resolved, opts)
    const creds = npm.config.getCredentialsByURI(registry)
    if (!creds.token && !creds.username) {
      throw Object.assign(new Error('This command requires you to be logged in.'), {
        code: 'ENEEDAUTH',
      })
    }
    await otplease(opts, opts => libpub(manifest, tarballData, opts))
  }

  if (spec.type === 'directory') {
    await runScript({
      event: 'publish',
      path: spec.fetchSpec,
      stdio: 'inherit',
      pkg: manifest,
      banner: log.level !== 'silent',
    })

    await runScript({
      event: 'postpublish',
      path: spec.fetchSpec,
      stdio: 'inherit',
      pkg: manifest,
      banner: log.level !== 'silent',
    })
  }

  return pkgContents
}

module.exports = Object.assign(cmd, { usage })