# Copyright 2019 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""API information controller."""

import os

from chromite.api import faux
from chromite.api import router as router_lib
from chromite.api import validate
from chromite.lib import constants
from chromite.lib import cros_build_lib


# API version number.
# The major version MUST be updated on breaking changes.
VERSION_MAJOR = 1
# The minor and bug versions are not currently utilized, but put in place
# to simplify future requirements.
VERSION_MINOR = 0
VERSION_BUG = 0


def _CompileProtoSuccess(_input_proto, output_proto, _config):
  """Mock success response for CompileProto."""
  output_proto.modified_files.add().path = '/code/chromite/api/gen/foo_pb2.py'


@faux.success(_CompileProtoSuccess)
@faux.empty_error
@validate.validation_complete
def CompileProto(_input_proto, output_proto, _config):
  """Compile the Build API proto, returning the list of modified files."""
  cmd = [os.path.join(constants.CHROMITE_DIR, 'api', 'compile_build_api_proto')]
  cros_build_lib.run(cmd)
  result = cros_build_lib.run(['git', 'status', '--porcelain=v1'],
                              cwd=constants.CHROMITE_DIR, capture_output=True,
                              encoding='utf-8')
  for line in result.stdout.splitlines():
    if not line:
      continue
    path = line.split()[-1]
    output_proto.modified_files.add().path = os.path.join(
        constants.CHROMITE_DIR, path)


@faux.all_empty
@validate.validation_complete
def GetMethods(_input_proto, output_proto, _config):
  """List all of the registered methods."""
  router = router_lib.GetRouter()
  for method in router.ListMethods():
    output_proto.methods.add().method = method


@validate.validation_complete
def GetVersion(_input_proto, output_proto, _config):
  """Get the Build API major version number."""
  output_proto.version.major = VERSION_MAJOR
  output_proto.version.minor = VERSION_MINOR
  output_proto.version.bug = VERSION_BUG