text: import logging as log
  import time
  from collections import namedtuple
  from tempfile import TemporaryDirectory
  
  from . import batch_job
  from . import git
  from . import job
  from . import merge_request as merge_request_module
  from . import single_merge_job
  from . import store
  from .project import AccessLevel, Project
  
  MergeRequest = merge_request_module.MergeRequest
  
  
  class Bot:
      def __init__(self, *, api, config):
          self._api = api
          self._config = config
  
          user = config.user
          opts = config.merge_opts
  
          if not user.is_admin:
              assert not opts.reapprove, (
                  "{0.username} is not an admin, can't impersonate!".format(user)
              )
              assert not opts.add_reviewers, (
                  "{0.username} is not an admin, can't lookup Reviewed-by: email addresses ".format(user)
              )
  
      def start(self):
          with TemporaryDirectory() as root_dir:
              repo_manager = store.RepoManager(
                  user=self.user,
                  root_dir=root_dir,
                  ssh_key_file=self._config.ssh_key_file,
                  timeout=self._config.git_timeout,
                  reference=self._config.git_reference_repo,
              )
              self._run(repo_manager)
  
      @property
      def user(self):
          return self._config.user
  
      @property
      def api(self):
          return self._api
  
      def _run(self, repo_manager):
          time_to_sleep_between_projects_in_secs = 1
          min_time_to_sleep_after_iterating_all_projects_in_secs = 30
          while True:
              projects = self._get_projects()
              self._process_projects(
                  repo_manager,
                  time_to_sleep_between_projects_in_secs,
                  projects,
              )
              big_sleep = max(0,
                              min_time_to_sleep_after_iterating_all_projects_in_secs -
                              time_to_sleep_between_projects_in_secs * len(projects))
              log.info('Sleeping for %s seconds...', big_sleep)
              time.sleep(big_sleep)
  
      def _get_projects(self):
          log.info('Finding out my current projects...')
          my_projects = Project.fetch_all_mine(self._api)
          project_regexp = self._config.project_regexp
          filtered_projects = [p for p in my_projects if project_regexp.match(p.path_with_namespace)]
          log.debug(
              'Projects that match project_regexp: %s',
              [p.path_with_namespace for p in filtered_projects]
          )
          filtered_out = set(my_projects) - set(filtered_projects)
          if filtered_out:
              log.debug(
                  'Projects that do not match project_regexp: %s',
                  [p.path_with_namespace for p in filtered_out]
              )
          return filtered_projects
  
      def _process_projects(
          self,
          repo_manager,
          time_to_sleep_between_projects_in_secs,
          projects,
      ):
          for project in projects:
              project_name = project.path_with_namespace
  
              if project.access_level < AccessLevel.reporter:
                  log.warning("Don't have enough permissions to browse merge requests in %s!", project_name)
                  continue
              merge_requests = self._get_merge_requests(project, project_name)
              self._process_merge_requests(repo_manager, project, merge_requests)
              time.sleep(time_to_sleep_between_projects_in_secs)
  
      def _get_merge_requests(self, project, project_name):
          log.info('Fetching merge requests assigned to me in %s...', project_name)
          my_merge_requests = MergeRequest.fetch_all_open_for_user(
              project_id=project.id,
              user_id=self.user.id,
              api=self._api,
              merge_order=self._config.merge_order,
          )
          branch_regexp = self._config.branch_regexp
          filtered_mrs = [mr for mr in my_merge_requests
                          if branch_regexp.match(mr.target_branch)]
          log.debug(
              'MRs that match branch_regexp: %s',
              [mr.web_url for mr in filtered_mrs]
          )
          filtered_out = set(my_merge_requests) - set(filtered_mrs)
          if filtered_out:
              log.debug(
                  'MRs that do not match branch_regexp: %s',
                  [mr.web_url for mr in filtered_out]
              )
          source_branch_regexp = self._config.source_branch_regexp
          source_filtered_mrs = [mr for mr in filtered_mrs
                                 if source_branch_regexp.match(mr.source_branch)]
          log.debug(
              'MRs that match source_branch_regexp: %s',
              [mr.web_url for mr in source_filtered_mrs]
          )
          source_filtered_out = set(filtered_mrs) - set(source_filtered_mrs)
          if filtered_out:
              log.debug(
                  'MRs that do not match source_branch_regexp: %s',
                  [mr.web_url for mr in source_filtered_out]
              )
          return source_filtered_mrs
  
      def _process_merge_requests(self, repo_manager, project, merge_requests):
          if not merge_requests:
              log.info('Nothing to merge at this point...')
              return
  
          try:
              repo = repo_manager.repo_for_project(project)
          except git.GitError:
              log.exception("Couldn't initialize repository for project!")
              raise
  
          log.info('Got %s requests to merge;', len(merge_requests))
          if (self._config.batch or self._config.optimistic_batch) and len(merge_requests) > 1:
              log.info('Attempting to merge as many MRs as possible using BatchMergeJob...')
              batch_merge_job = batch_job.BatchMergeJob(
                  api=self._api,
                  user=self.user,
                  project=project,
                  merge_requests=merge_requests,
                  repo=repo,
                  options=self._config.merge_opts,
                  optimistic=self._config.optimistic_batch,
              )
              try:
                  batch_merge_job.execute()
                  return
              except batch_job.CannotBatch as err:
                  log.warning('BatchMergeJob aborted: %s', err)
              except batch_job.CannotMerge as err:
                  log.warning('BatchMergeJob failed: %s', err)
                  return
              except git.GitError as err:
                  log.exception('BatchMergeJob failed: %s', err)
          log.info('Attempting to merge the oldest MR...')
          merge_request = merge_requests[0]
          merge_job = self._get_single_job(
              project=project, merge_request=merge_request, repo=repo,
              options=self._config.merge_opts,
          )
          merge_job.execute()
  
      def _get_single_job(self, project, merge_request, repo, options):
          return single_merge_job.SingleMergeJob(
              api=self._api,
              user=self.user,
              project=project,
              merge_request=merge_request,
              repo=repo,
              options=options,
          )
  
  
  class BotConfig(namedtuple('BotConfig',
                             'user ssh_key_file project_regexp merge_order merge_opts git_timeout ' +
                             'git_reference_repo branch_regexp source_branch_regexp batch optimistic_batch')):
      pass
  
  
  MergeJobOptions = job.MergeJobOptions
  Fusion = job.Fusion
  