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"""Buildgen vsprojects plugin.

This parses the list of libraries, and generates globals "vsprojects"
and "vsproject_dict", to be used by the visual studio generators.

"""


import hashlib
import re


def mako_plugin(dictionary):
  """The exported plugin code for generate_vsprojeccts

  We want to help the work of the visual studio generators.

  """

  libs = dictionary.get('libs', [])
  targets = dictionary.get('targets', [])

  for lib in libs:
    lib['is_library'] = True
  for target in targets:
    target['is_library'] = False

  projects = []
  projects.extend(libs)
  projects.extend(targets)
  for target in projects:
    if 'build' in target and target['build'] == 'test':
      default_test_dir = 'test'
    else:
      default_test_dir = '.'
    if 'vs_config_type' not in target:
      if 'build' in target and target['build'] == 'test':
        target['vs_config_type'] = 'Application'
      else:
        target['vs_config_type'] = 'StaticLibrary'
    if 'vs_packages' not in target:
      target['vs_packages'] = []
    if 'vs_props' not in target:
      target['vs_props'] = []
    target['vs_proj_dir'] = target.get('vs_proj_dir', default_test_dir)
    if target.get('vs_project_guid', None) is None and 'windows' in target.get('platforms', ['windows']):
      name = target['name']
      guid = re.sub('(........)(....)(....)(....)(.*)',
             r'{\1-\2-\3-\4-\5}',
             hashlib.md5(name).hexdigest())
      target['vs_project_guid'] = guid.upper()
  # Exclude projects without a visual project guid, such as the tests.
  projects = [project for project in projects
                if project.get('vs_project_guid', None)]

  projects = [project for project in projects
                if project['language'] != 'c++' or project['build'] == 'all' or project['build'] == 'protoc' or (project['language'] == 'c++' and  (project['build'] == 'test' or project['build'] == 'private'))]

  project_dict = dict([(p['name'], p) for p in projects])

  packages = dictionary.get('vspackages', [])
  packages_dict = dict([(p['name'], p) for p in packages])

  dictionary['vsprojects'] = projects
  dictionary['vsproject_dict'] = project_dict
  dictionary['vspackages_dict'] = packages_dict