import os
import subprocess
import sys
import time

import unicodedata

from threading import Thread

from termcolor import colored

from client import DockerClient, PodmanClient, Command, FileCopy


def remove_control_characters(s):
  return "".join(ch for ch in unicode(s, 'utf-8') if unicodedata.category(ch)[0] != "C")


# These tuples are the box&version and the client to use.
BOXES = [
  ("kleesc/centos7-podman --box-version=0.11.1.1", PodmanClient()), # podman 0.11.1.1

  ("kleesc/coreos --box-version=1911.4.0", DockerClient()), # docker 18.06.1
  ("kleesc/coreos --box-version=1800.7.0", DockerClient()), # docker 18.03.1
  ("kleesc/coreos --box-version=1688.5.3", DockerClient()), # docker 17.12.1
  ("kleesc/coreos --box-version=1632.3.0", DockerClient()), # docker 17.09.1
  ("kleesc/coreos --box-version=1576.5.0", DockerClient()), # docker 17.09.0
  ("kleesc/coreos --box-version=1520.9.0", DockerClient()), # docker 1.12.6
  ("kleesc/coreos --box-version=1235.6.0", DockerClient()), # docker 1.12.3
  ("kleesc/coreos --box-version=1185.5.0", DockerClient()), # docker 1.11.2

  ("kleesc/coreos --box-version=1122.3.0", DockerClient(requires_email=True)), # docker 1.10.3
  ("kleesc/coreos --box-version=899.17.0", DockerClient(requires_email=True)), # docker 1.9.1
  ("kleesc/coreos --box-version=835.13.0", DockerClient(requires_email=True)), # docker 1.8.3
  ("kleesc/coreos --box-version=766.5.0", DockerClient(requires_email=True)), # docker 1.7.1
  ("kleesc/coreos --box-version=717.3.0", DockerClient(requires_email=True)), # docker 1.6.2
  ("kleesc/coreos --box-version=647.2.0", DockerClient(requires_email=True)),  # docker 1.5.0
  ("kleesc/coreos --box-version=557.2.0", DockerClient(requires_email=True)), # docker 1.4.1
  ("kleesc/coreos --box-version=522.6.0", DockerClient(requires_email=True)), # docker 1.3.3

  ("yungsang/coreos --box-version=1.3.7", DockerClient(requires_email=True)), # docker 1.3.2
  ("yungsang/coreos --box-version=1.2.9", DockerClient(requires_email=True)), # docker 1.2.0
  ("yungsang/coreos --box-version=1.1.5", DockerClient(requires_email=True)), # docker 1.1.2
  ("yungsang/coreos --box-version=1.0.0", DockerClient(requires_email=True)), # docker 1.0.1
  ("yungsang/coreos --box-version=0.9.10", DockerClient(requires_email=True)), # docker 1.0.0
  ("yungsang/coreos --box-version=0.9.6", DockerClient(requires_email=True)), # docker 0.11.1

  ("yungsang/coreos --box-version=0.9.1", DockerClient(requires_v1=True, requires_email=True)), # docker 0.10.0
  ("yungsang/coreos --box-version=0.3.1", DockerClient(requires_v1=True, requires_email=True)), # docker 0.9.0
]


def _check_vagrant():
  vagrant_command = 'vagrant'
  vagrant = any(os.access(os.path.join(path, vagrant_command), os.X_OK)
                for path in os.environ.get('PATH').split(':'))
  vagrant_plugins = subprocess.check_output([vagrant_command, 'plugin', 'list'])
  return (vagrant, 'vagrant-scp' in vagrant_plugins)


def _load_ca(box, ca_cert):
  if 'coreos' in box:
    yield FileCopy(ca_cert, '/home/core/ca.pem')
    yield Command('sudo cp /home/core/ca.pem /etc/ssl/certs/ca.pem')
    yield Command('sudo update-ca-certificates')
    yield Command('sudo systemctl daemon-reload')
  elif 'centos' in box:
    yield FileCopy(ca_cert, '/home/vagrant/ca.pem')
    yield Command('sudo cp /home/vagrant/ca.pem /etc/pki/ca-trust/source/anchors/')
    yield Command('sudo update-ca-trust enable')
    yield Command('sudo update-ca-trust extract')
  else:
    raise Exception("unknown box for loading CA cert")


# extra steps to initialize the system
def _init_system(box):
  if 'coreos' in box:
    # disable the update-engine so that it's easier to debug
    yield Command('sudo systemctl stop update-engine')


class CommandFailedException(Exception):
  pass


class SpinOutputter(Thread):
  def __init__(self, initial_message):
    super(SpinOutputter, self).__init__()
    self.previous_line = ''
    self.next_line = initial_message
    self.running = True
    self.daemon = True

  @staticmethod
  def spinning_cursor():
    while 1:
      for cursor in '|/-\\':
        yield cursor

  def set_next(self, text):
    first_line = text.split('\n')[0].strip()
    first_line = remove_control_characters(first_line)
    self.next_line = first_line[:80]

  def _clear_line(self):
    sys.stdout.write('\r')
    sys.stdout.write(' ' * (len(self.previous_line) + 2))
    sys.stdout.flush()

    sys.stdout.write('\r')
    sys.stdout.flush()
    self.previous_line = ''

  def stop(self):
    self._clear_line()
    self.running = False

  def run(self):
    spinner = SpinOutputter.spinning_cursor()
    while self.running:
      self._clear_line()
      sys.stdout.write('\r')
      sys.stdout.flush()

      sys.stdout.write(next(spinner))
      sys.stdout.write(" ")
      sys.stdout.write(colored(self.next_line, attrs=['dark']))
      sys.stdout.flush()

      self.previous_line = self.next_line
      time.sleep(0.25)


def _run_and_wait(command, error_allowed=False):
  # Run the command itself.
  outputter = SpinOutputter('Running command %s' % command)
  outputter.start()

  output = ''
  process = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
  for line in iter(process.stdout.readline, ''):
    output += line
    outputter.set_next(line)

  result = process.wait()
  outputter.stop()

  failed = result != 0 and not error_allowed
  # vagrant scp doesn't report auth failure as non-0 exit
  failed = failed or (len(command) > 1 and command[1] == 'scp' and
                      'authentication failures' in output)

  if failed:
    print colored('>>> Command `%s` Failed:' % command, 'red')
    print output
    raise CommandFailedException()

  return output


def _indent(text, amount):
  return ''.join((' ' * amount) + line for line in text.splitlines(True))


def scp_to_vagrant(source, destination):
  '''scp_to_vagrant copies the file from source to destination in the default
    vagrant box without vagrant scp, which may fail on some coreos boxes.
  '''
  config = _run_and_wait(['vagrant', 'ssh-config'])
  config_lines = config.split('\n')
  params = ['scp']
  for i in xrange(len(config_lines)):
    if 'Host default' in config_lines[i]:
      config_i = i + 1
      while config_i < len(config_lines):
        if config_lines[config_i].startswith('  '):
          params += ['-o', '='.join(config_lines[config_i].split())]
        else:
          break

        config_i += 1
      break

  params.append(source)
  params.append('core@localhost:' + destination)
  return _run_and_wait(params)


def _run_commands(commands):
  last_result = None
  for command in commands:
    if isinstance(command, Command):
      last_result = _run_and_wait(['vagrant', 'ssh', '-c', command.command])
    else:
      try:
        last_result = _run_and_wait(['vagrant', 'scp', command.source, command.destination])
      except CommandFailedException as e:
        print colored('>>> Retry FileCopy command without vagrant scp...', 'red')
        # sometimes the vagrant scp fails because of invalid ssh configuration.
        last_result = scp_to_vagrant(command.source, command.destination)

  return last_result


def _run_box(box, client, registry, ca_cert):
  vagrant, vagrant_scp = _check_vagrant()
  if not vagrant:
    print("vagrant command not found")
    return

  if not vagrant_scp:
    print("vagrant-scp plugin not installed")
    return

  namespace = 'devtable'
  repo_name = 'testrepo%s' % int(time.time())
  username = 'devtable'
  password = 'password'

  print colored('>>> Box: %s' % box, attrs=['bold'])
  print colored('>>> Starting box', 'yellow')
  _run_and_wait(['vagrant', 'destroy', '-f'], error_allowed=True)
  _run_and_wait(['rm', 'Vagrantfile'], error_allowed=True)
  _run_and_wait(['vagrant', 'init'] + box.split(' '))
  _run_and_wait(['vagrant', 'up', '--provider', 'virtualbox'])

  _run_commands(_init_system(box))

  if ca_cert:
    print colored('>>> Setting up runtime with cert ' + ca_cert, 'yellow')
    _run_commands(_load_ca(box, ca_cert))
    _run_commands(client.setup_client(registry, verify_tls=True))
  else:
    print colored('>>> Setting up runtime with insecure HTTP(S)', 'yellow')
    _run_commands(client.setup_client(registry, verify_tls=False))

  print colored('>>> Client version', 'cyan')
  runtime_version = _run_commands(client.print_version())
  print _indent(runtime_version, 4)

  print colored('>>> Populating test image', 'yellow')
  _run_commands(client.populate_test_image(registry, namespace, repo_name))

  print colored('>>> Testing login', 'cyan')
  _run_commands(client.login(registry, username, password))

  print colored('>>> Testing push', 'cyan')
  _run_commands(client.push(registry, namespace, repo_name))

  print colored('>>> Removing all images', 'yellow')
  _run_commands(client.pre_pull_cleanup(registry, namespace, repo_name))

  print colored('>>> Testing pull', 'cyan')
  _run_commands(client.pull(registry, namespace, repo_name))

  print colored('>>> Verifying', 'cyan')
  _run_commands(client.verify(registry, namespace, repo_name))

  print colored('>>> Tearing down box', 'magenta')
  _run_and_wait(['vagrant', 'destroy', '-f'], error_allowed=True)

  print colored('>>> Successfully tested box %s' % box, 'green')
  print ""


def test_clients(registry='10.0.2.2:5000', ca_cert=''):
  print colored('>>> Running against registry ', attrs=['bold']) + colored(registry, 'cyan')
  for box, client in BOXES:
    try:
      _run_box(box, client, registry, ca_cert)
    except CommandFailedException:
      sys.exit(-1)


if __name__ == "__main__":
  test_clients(sys.argv[1] if len(sys.argv) > 1 else '10.0.2.2:5000', sys.argv[2]
               if len(sys.argv) > 2 else '')