var cat = require('graceful-fs').writeFileSync
var exec = require('child_process').exec
var readdir = require('graceful-fs').readdirSync
var resolve = require('path').resolve

var mkdirp = require('mkdirp')
var rimraf = require('rimraf')
var test = require('tap').test
var tmpdir = require('osenv').tmpdir
var which = require('which')

var common = require('../common-tap.js')

var pkg = resolve(__dirname, 'git-npmignore')
var dep = resolve(pkg, 'deps', 'gitch')
var packname = 'gitch-1.0.0.tgz'
var packed = resolve(pkg, packname)
var modules = resolve(pkg, 'node_modules')
var installed = resolve(modules, 'gitch')
var expected = [
  'a.js',
  'package.json',
  '.npmignore'
].sort()

var EXEC_OPTS = { cwd: pkg }

var gitignore = 'node_modules/\n'
var npmignore = 't.js\n'

var a = "console.log('hi');"
var t = "require('tap').test(function (t) { t.pass('I am a test!'); t.end(); });"
var fixture = {
  'name': 'gitch',
  'version': '1.0.0',
  'private': true,
  'main': 'a.js'
}

test('setup', function (t) {
  setup(function (er) {
    t.ifError(er, 'setup ran OK')

    t.end()
  })
})

test('npm pack directly from directory', function (t) {
  packInstallTest(dep, t)
})

test('npm pack via git', function (t) {
  packInstallTest('git+file://' + dep, t)
})

test('cleanup', function (t) {
  cleanup()

  t.end()
})

function packInstallTest (spec, t) {
  common.npm(
    [
      '--loglevel', 'silent',
      'pack', spec
    ],
    EXEC_OPTS,
    function (err, code, stdout, stderr) {
      t.ifError(err, 'npm pack ran without error')
      t.notOk(code, 'npm pack exited cleanly')
      t.notOk(stderr, 'npm pack ran silently')
      t.equal(stdout.trim(), packname, 'got expected package name')

      common.npm(
        [
          '--loglevel', 'silent',
          'install', packed
        ],
        EXEC_OPTS,
        function (err, code, stdout, stderr) {
          t.ifError(err, 'npm install ran without error')
          t.notOk(code, 'npm install exited cleanly')
          t.notOk(stderr, 'npm install ran silently')

          var actual = readdir(installed).sort()
          t.same(actual, expected, 'no unexpected files in packed directory')

          rimraf(packed, function () {
            t.end()
          })
        }
      )
    }
  )
}

function cleanup () {
  process.chdir(tmpdir())
  rimraf.sync(pkg)
}

function setup (cb) {
  cleanup()

  mkdirp.sync(modules)
  mkdirp.sync(dep)

  process.chdir(dep)

  cat(resolve(dep, '.npmignore'), npmignore)
  cat(resolve(dep, '.gitignore'), gitignore)
  cat(resolve(dep, 'a.js'), a)
  cat(resolve(dep, 't.js'), t)
  cat(resolve(dep, 'package.json'), JSON.stringify(fixture))

  common.npm(
    [
      '--loglevel', 'silent',
      'cache', 'clean'
    ],
    EXEC_OPTS,
    function (er, code, _, stderr) {
      if (er) return cb(er)
      if (code) return cb(new Error('npm cache nonzero exit: ' + code))
      if (stderr) return cb(new Error('npm cache clean error: ' + stderr))

      which('git', function found (er, git) {
        if (er) return cb(er)

        exec(git + ' init', init)

        function init (er, _, stderr) {
          if (er) return cb(er)
          if (stderr) return cb(new Error('git init error: ' + stderr))

          exec(git + " config user.name 'Phantom Faker'", user)
        }

        function user (er, _, stderr) {
          if (er) return cb(er)
          if (stderr) return cb(new Error('git config error: ' + stderr))

          exec(git + ' config user.email nope@not.real', email)
        }

        function email (er, _, stderr) {
          if (er) return cb(er)
          if (stderr) return cb(new Error('git config error: ' + stderr))

          exec(git + ' add .', addAll)
        }

        function addAll (er, _, stderr) {
          if (er) return cb(er)
          if (stderr) return cb(new Error('git add . error: ' + stderr))

          exec(git + ' commit -m boot', commit)
        }

        function commit (er, _, stderr) {
          if (er) return cb(er)
          if (stderr) return cb(new Error('git commit error: ' + stderr))

          cb()
        }
      })
    }
  )
}