#!/usr/bin/env node

"use strict";

var semver = require('semver')
var program = require('commander')
var path = require('path')
var fs = require('fs')
var tar = require('tar')
var zlib = require('zlib')
var fstream = require('fstream')
var Packer = require('fstream-npm')
var debug = require('debug')('mosaic:publish')
var mosaic = require('../lib/mosaic')


program.option('-f, --force', 'Force a re-publish')
program.parse(process.argv)


var args = program.args
var cwd = process.cwd()
var dpath = cwd

if (args[0]) dpath = path.join(cwd, args[0])

var fpath = path.join(dpath, 'package.json')

if (!fs.existsSync(fpath)) mosaic.fatal('没找到 package.json')

var mo = require(fpath)


if (isValid(mo)) {
  mosaic.log('publish', mo.name)
  process.stdin.resume()
  publish(dpath)
}


function publish(dpath){
  new Packer({ path: dpath, type: 'Directory', isDirectory: true })
    .pipe(tar.Pack())
    .pipe(zlib.Gzip())
    .pipe(fstream.Writer('package.tgz'))
    .on('close', afterTar)
}

function afterTar(err) {
  if (err) return mosaic.fatal(err)

  var url = [mo.name, mo.version].join('\/')
  var req = mosaic.agent()
    .get(mosaic.remote(url))
    .on('error', function(err) {
      console.trace(err)
      cleanup()
    })
    .end(function(res) {
      if (res.statusCode === 200 && res.text && res.text.indexOf('统一登录中心') >= 0) {
        // In superagent, res.req is the instance returned by http.request,
        // which is not an instance of the request wrap by superagent and
        // does not provide .url property.
        //
        // For code brevity, let's simply set it.
        res.req.url = req.url
        mosaic.login(res).done(function() { afterTar() })
      }
      else if (res.statusCode === 200) {
        if (program.force) {
          postTar(url)
        }
        else {
          mosaic.log('mosaic', url + ' exists. use --force to re-publish')
          process.exit(0)
        }
      }
      else if (res.statusCode === 404) {
        postTar(url)
      }
    })
}

function postTar(url) {
  var req = mosaic.agent()
    .put(mosaic.remote(url))

  if (program.force) req.query({ force: '' })

  req
    .attach('tarball', 'package.tgz')
    .buffer(false)
    .on('response', function(res) {
      res.text = ''
      res.on('data', function(chunk) {
        res.text += chunk
        process.stdout.write(chunk)
      })
      res.on('end', function() {
        var status = res.statusCode

        if (status === 201) {
          var lines = res.text.split('\n')
          var data = JSON.parse(lines[lines.length - 1])

          process.stdout.write('\n\n')
          for (var p in data) {
            mosaic.log(p, data[p])
          }
        }
        else {
          mosaic.error('Wrong status code returned ' + res.statusCode)
          mosaic.error(res.text)
        }
        cleanup()
      })
    })
    .on('error', function(err) {
      cleanup()
      console.trace(err)
    })
    .end()
}

function isValid(mo){
  var name = mo.name
  var version = mo.version
  var valid = true

  function fail(msg) {
    valid = false
    mosaic.error(msg)
  }

  if (!name) fail('未填写名称')
  if (!version) fail('未填写版本')

  if (!/^(mosaics|mo)\/\w+$/.test(name) && !/^\w+(?:\.\w+)+\/\w+$/.test(name)) fail('名称不符合 命名空间/组件名 规范')
  if (!semver.valid(version)) fail('版本 ' + version + ' 不合规范')

  return valid
}

function cleanup() {
  if (fs.existsSync('package.tgz')) fs.unlinkSync('package.tgz')
  process.exit()
}