import math
import logging

from random import SystemRandom
from loremipsum import get_sentence

from data.buildlogs import BuildLogs
from random import choice


logger = logging.getLogger(__name__)


class TestBuildLogs(BuildLogs):
  def __init__(self, redis_host, namespace, repository, test_build_id):
    super(TestBuildLogs, self).__init__(redis_host)
    self.namespace = namespace
    self.repository = repository
    self.test_build_id = test_build_id
    self.last_command = 0
    self.logs = [self._generate_command()]
    self.commands = [{
      'index': 0,
      'message': self.logs[0]['message'],
    }]
    self.request_counter = 0
    self._generate_logs()
    self._status = {}

  def _get_random_command(self):
    COMMANDS = ['FROM', 'MAINTAINER', 'RUN', 'CMD', 'EXPOSE', 'ENV', 'ADD', 
                'ENTRYPOINT', 'VOLUME', 'USER', 'WORKDIR']

    return choice(COMMANDS)

  def _generate_command(self):
    self.last_command += 1

    sentence = get_sentence()
    command = self._get_random_command()
    if command == 'FROM':
      sentence = choice(['ubuntu', 'quay.io/devtable/simple', 'quay.io/buynlarge/orgrepo', 'stackbrew/ubuntu:precise'])

    return {
      'message': 'Step %s: %s %s' % (self.last_command, command, sentence),
      'is_command': True,
    }

  def _generate_logs(self):
    rand = SystemRandom()
    num_logs = rand.randint(1, 500)
    for _ in range(num_logs):
      if rand.randint(1, 50) == 1:
        cmd = self._generate_command()
        self.commands.append({
          'message': cmd['message'],
          'index': len(self.logs),
        })
        self.logs.append(cmd)
      else:
        self.logs.append({
          'message': get_sentence(),
        })

  @staticmethod
  def _generate_image_completion(rand_func):
    images = {}
    for image_id in range(rand_func.randint(1, 11)):
      total = int(math.pow(abs(rand_func.gauss(0, 1000)), 2))
      current = rand_func.randint(0, total)
      image_id = 'image_id_%s' % image_id
      images[image_id] = {
        'total': total,
        'current': current,
      }
    return images

  def _generate_fake_status(self):
    random = SystemRandom()
    phases = {
      'waiting': {},
      'starting': {
        'total_commands': 7,
        'current_command': 0,
      },
      'initializing': {},
      'error': {},
      'complete': {},
      'building': {
        'total_commands': 7,
        'current_command': random.randint(1, 7),
      },
      'pushing': {
        'total_commands': 7,
        'current_command': 7,
        'push_completion': random.random(),
        'image_completion': self._generate_image_completion(random),
      },
    }

    phase = random.choice(phases.keys())

    from data import model
    build_obj = model.get_repository_build(self.namespace, self.repository,
                                           self.test_build_id)
    build_obj.phase = phase
    build_obj.save()

    return phases[phase]

  def get_log_entries(self, build_id, start_index, end_index):
    if build_id == self.test_build_id:
      self.request_counter += 1
      if self.request_counter % 10 == 0:
        self._generate_logs()
      logger.debug('Returning logs %s:%s', start_index, end_index)
      if end_index >= 0:
        end_index += 1
      return (len(self.logs), self.logs[start_index:end_index])
    else:
      return super(TestBuildLogs, self).get_log_entries(build_id, start_index,
                                                        end_index)

  def get_commands(self, build_id):
    if build_id == self.test_build_id:
      self.request_counter += 1
      if self.request_counter % 10 == 0:
        self._generate_logs()
      return self.commands
    else:
      return super(TestBuildLogs, self).get_commands(build_id)

  def get_last_command(self, build_id):
    if build_id == self.test_build_id:
      self.request_counter += 1
      if self.request_counter % 10 == 0:
        self._generate_logs()
      return self.commands[-1]
    else:
      return super(TestBuildLogs, self).get_last_command(build_id)

  def get_status(self, build_id):
    if build_id == self.test_build_id:
      self.request_counter += 1
      if self.request_counter % 10 == 0:
        self._generate_logs()
      last_status = self._status
      self._status = self._generate_fake_status()
      return last_status
    else:
      return super(TestBuildLogs, self).get_status(build_id)