'use strict'

const BB = require('bluebird')

const cacache = require('cacache')
const cache = require('./cache')
const createReadStream = require('graceful-fs').createReadStream
const getPublishConfig = require('./utils/get-publish-config.js')
const lifecycle = BB.promisify(require('./utils/lifecycle.js'))
const log = require('npmlog')
const mapToRegistry = require('./utils/map-to-registry.js')
const npa = require('npm-package-arg')
const npm = require('./npm.js')
const output = require('./utils/output.js')
const pack = require('./pack')
const pacote = require('pacote')
const pacoteOpts = require('./config/pacote')
const path = require('path')
const pipe = BB.promisify(require('mississippi').pipe)
const readJson = BB.promisify(require('read-package-json'))
const semver = require('semver')
const statAsync = BB.promisify(require('graceful-fs').stat)
const writeStreamAtomic = require('fs-write-stream-atomic')

publish.usage = 'npm publish [<tarball>|<folder>] [--tag <tag>] [--access <public|restricted>]' +
                "\n\nPublishes '.' if no argument supplied" +
                '\n\nSets tag `latest` if no --tag specified'

publish.completion = function (opts, cb) {
  // publish can complete to a folder with a package.json
  // or a tarball, or a tarball url.
  // for now, not yet implemented.
  return cb()
}

module.exports = publish
function publish (args, isRetry, cb) {
  if (typeof cb !== 'function') {
    cb = isRetry
    isRetry = false
  }
  if (args.length === 0) args = ['.']
  if (args.length !== 1) return cb(publish.usage)

  log.verbose('publish', args)

  const t = npm.config.get('tag').trim()
  if (semver.validRange(t)) {
    return cb(new Error('Tag name must not be a valid SemVer range: ' + t))
  }

  publish_(args[0]).then((pkg) => {
    output(`+ ${pkg._id}`)
    cb()
  }, cb)
}

function publish_ (arg) {
  return statAsync(arg).then((stat) => {
    if (stat.isDirectory()) {
      return stat
    } else {
      const err = new Error('not a directory')
      err.code = 'ENOTDIR'
      throw err
    }
  }).then(() => {
    return publishFromDirectory(arg)
  }, (err) => {
    if (err.code !== 'ENOENT' && err.code !== 'ENOTDIR') {
      throw err
    } else {
      return publishFromPackage(arg)
    }
  })
}

function publishFromDirectory (arg) {
  // All this readJson is because any of the given scripts might modify the
  // package.json in question, so we need to refresh after every step.
  return pack.prepareDirectory(arg).then(() => {
    return readJson(path.join(arg, 'package.json'))
  }).then((pkg) => {
    return lifecycle(pkg, 'prepublishOnly', arg)
  }).then(() => {
    return readJson(path.join(arg, 'package.json'))
  }).then((pkg) => {
    return cacache.tmp.withTmp(npm.tmp, {tmpPrefix: 'fromDir'}, (tmpDir) => {
      const target = path.join(tmpDir, 'package.tgz')
      return pack.packDirectory(pkg, arg, target).then(() => {
        return upload(arg, pkg, false, target)
      })
    })
  }).then(() => {
    return readJson(path.join(arg, 'package.json'))
  }).tap((pkg) => {
    return lifecycle(pkg, 'publish', arg)
  }).tap((pkg) => {
    return lifecycle(pkg, 'postpublish', arg)
  })
}

function publishFromPackage (arg) {
  return cacache.tmp.withTmp(npm.tmp, {tmpPrefix: 'fromPackage'}, (tmp) => {
    const extracted = path.join(tmp, 'package')
    const target = path.join(tmp, 'package.json')
    return cache.add(arg).then((info) => {
      const opts = pacoteOpts({integrity: info.integrity})
      return BB.all([
        pipe(
          cacache.get.stream.byDigest(opts.cache, info.integrity),
          writeStreamAtomic(target)
        ).then(() => target),
        pacote.extract(arg, extracted, opts).then(() => {
          return readJson(path.join(extracted, 'package.json'))
        })
      ]).spread((target, pkg) => {
        return upload(arg, pkg, false, target)
      })
    })
  })
}

function upload (arg, pkg, isRetry, cached) {
  if (!pkg) {
    return BB.reject(new Error('no package.json file found'))
  }
  if (pkg.private) {
    return BB.reject(new Error(
      'This package has been marked as private\n' +
      "Remove the 'private' field from the package.json to publish it."
    ))
  }

  const mappedConfig = getPublishConfig(
    pkg.publishConfig,
    npm.config,
    npm.registry
  )
  const config = mappedConfig.config
  const registry = mappedConfig.client

  pkg._npmVersion = npm.version
  pkg._nodeVersion = process.versions.node

  delete pkg.modules

  return BB.fromNode((cb) => {
    mapToRegistry(pkg.name, config, (err, registryURI, auth, registryBase) => {
      if (err) { return cb(err) }
      cb(null, [registryURI, auth, registryBase])
    })
  }).spread((registryURI, auth, registryBase) => {
    // we just want the base registry URL in this case
    log.verbose('publish', 'registryBase', registryBase)
    log.silly('publish', 'uploading', cached)

    pkg._npmUser = {
      name: auth.username,
      email: auth.email
    }

    const params = {
      metadata: pkg,
      body: createReadStream(cached),
      auth: auth
    }

    // registry-frontdoor cares about the access level, which is only
    // configurable for scoped packages
    if (config.get('access')) {
      if (!npa(pkg.name).scope && config.get('access') === 'restricted') {
        throw new Error("Can't restrict access to unscoped packages.")
      }

      params.access = config.get('access')
    }

    log.showProgress('publish:' + pkg._id)
    return BB.fromNode((cb) => {
      registry.publish(registryBase, params, cb)
    }).catch((err) => {
      if (
        err.code === 'EPUBLISHCONFLICT' &&
        npm.config.get('force') &&
        !isRetry
      ) {
        log.warn('publish', 'Forced publish over ' + pkg._id)
        return BB.fromNode((cb) => {
          npm.commands.unpublish([pkg._id], cb)
        }).finally(() => {
          // ignore errors.  Use the force.  Reach out with your feelings.
          return upload(arg, pkg, true, cached).catch(() => {
            // but if it fails again, then report the first error.
            throw err
          })
        })
      } else {
        throw err
      }
    })
  })
}
