#!/usr/bin/env python2.7
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"""Definition of targets to build artifacts."""

import jobset


def create_docker_jobspec(name, dockerfile_dir, shell_command, environ={},
                   flake_retries=0, timeout_retries=0):
  """Creates jobspec for a task running under docker."""
  environ = environ.copy()
  environ['RUN_COMMAND'] = shell_command

  docker_args=[]
  for k,v in environ.iteritems():
    docker_args += ['-e', '%s=%s' % (k, v)]
  docker_env = {'DOCKERFILE_DIR': dockerfile_dir,
                'DOCKER_RUN_SCRIPT': 'tools/jenkins/docker_run.sh',
                'OUTPUT_DIR': 'artifacts'}
  jobspec = jobset.JobSpec(
          cmdline=['tools/jenkins/build_and_run_docker.sh'] + docker_args,
          environ=docker_env,
          shortname='build_artifact.%s' % (name),
          timeout_seconds=30*60,
          flake_retries=flake_retries,
          timeout_retries=timeout_retries)
  return jobspec


def create_jobspec(name, cmdline, environ=None, shell=False,
                   flake_retries=0, timeout_retries=0):
  """Creates jobspec."""
  jobspec = jobset.JobSpec(
          cmdline=cmdline,
          environ=environ,
          shortname='build_artifact.%s' % (name),
          timeout_seconds=30*60,
          flake_retries=flake_retries,
          timeout_retries=timeout_retries,
          shell=shell)
  return jobspec


def macos_arch_env(arch):
  """Returns environ specifying -arch arguments for make."""
  if arch == 'x86':
    arch_arg = '-arch i386'
  elif arch == 'x64':
    arch_arg = '-arch x86_64'
  else:
    raise Exception('Unsupported arch')
  return {'CFLAGS': arch_arg, 'LDFLAGS': arch_arg}

_MACOS_COMPAT_FLAG = '-mmacosx-version-min=10.7'

_ARCH_FLAG_MAP = {
  'x86': '-m32',
  'x64': '-m64'
}

class PythonArtifact:
  """Builds Python artifacts."""

  def __init__(self, platform, arch):
    self.name = 'python_%s_%s' % (platform, arch)
    self.platform = platform
    self.arch = arch
    self.labels = ['artifact', 'python', platform, arch]

  def pre_build_jobspecs(self):
      return []

  def build_jobspec(self):
    if self.platform == 'windows':
      raise Exception('Not supported yet.')
    else:
      environ = {}
      if self.platform == 'linux':
        if self.arch == 'x86':
          environ['SETARCH_CMD'] = 'linux32'
        return create_docker_jobspec(self.name,
            'tools/dockerfile/grpc_artifact_linux_%s' % self.arch,
            'tools/run_tests/build_artifact_python.sh',
            environ=environ)
      else:
        environ['SKIP_PIP_INSTALL'] = 'TRUE'
        return create_jobspec(self.name,
                              ['tools/run_tests/build_artifact_python.sh'],
                              environ=environ)

  def __str__(self):
    return self.name


class RubyArtifact:
  """Builds ruby native gem."""

  def __init__(self, platform, arch):
    self.name = 'ruby_native_gem_%s_%s' % (platform, arch)
    self.platform = platform
    self.arch = arch
    self.labels = ['artifact', 'ruby', platform, arch]

  def pre_build_jobspecs(self):
    return []

  def build_jobspec(self):
    if self.platform == 'windows':
      raise Exception("Not supported yet")
    else:
      if self.platform == 'linux':
        environ = {}
        if self.arch == 'x86':
          environ['SETARCH_CMD'] = 'linux32'
        return create_docker_jobspec(self.name,
            'tools/dockerfile/grpc_artifact_linux_%s' % self.arch,
            'tools/run_tests/build_artifact_ruby.sh',
            environ=environ)
      else:
        return create_jobspec(self.name,
                              ['tools/run_tests/build_artifact_ruby.sh'])


class CSharpExtArtifact:
  """Builds C# native extension library"""

  def __init__(self, platform, arch):
    self.name = 'csharp_ext_%s_%s' % (platform, arch)
    self.platform = platform
    self.arch = arch
    self.labels = ['artifact', 'csharp', platform, arch]

  def pre_build_jobspecs(self):
    if self.platform == 'windows':
      return [create_jobspec('prebuild_%s' % self.name,
                             ['tools\\run_tests\\pre_build_c.bat'],
                             shell=True,
                             flake_retries=5,
                             timeout_retries=2)]
    else:
      return []

  def build_jobspec(self):
    if self.platform == 'windows':
      msbuild_platform = 'Win32' if self.arch == 'x86' else self.arch
      return create_jobspec(self.name,
                            ['tools\\run_tests\\build_artifact_csharp.bat',
                             'vsprojects\\grpc_csharp_ext.sln',
                             '/p:Configuration=Release',
                             '/p:PlatformToolset=v120',
                             '/p:Platform=%s' % msbuild_platform],
                            shell=True)
    else:
      environ = {'CONFIG': 'opt',
                 'EMBED_OPENSSL': 'true',
                 'EMBED_ZLIB': 'true',
                 'CFLAGS': '-DGPR_BACKWARDS_COMPATIBILITY_MODE'}
      if self.platform == 'linux':
        return create_docker_jobspec(self.name,
            'tools/dockerfile/grpc_artifact_linux_%s' % self.arch,
            'tools/run_tests/build_artifact_csharp.sh')
      else:
        environ.update(macos_arch_env(self.arch))
        return create_jobspec(self.name,
                              ['tools/run_tests/build_artifact_csharp.sh'],
                              environ=environ)

  def __str__(self):
    return self.name


node_gyp_arch_map = {
  'x86': 'ia32',
  'x64': 'x64'
}

class NodeExtArtifact:
  """Builds Node native extension"""

  def __init__(self, platform, arch):
    self.name = 'node_ext_{0}_{1}'.format(platform, arch)
    self.platform = platform
    self.arch = arch
    self.gyp_arch = node_gyp_arch_map[arch]
    self.labels = ['artifact', 'node', platform, arch]

  def pre_build_jobspecs(self):
    return []

  def build_jobspec(self):
    if self.platform == 'windows':
      return create_jobspec(self.name,
                            ['tools\\run_tests\\build_artifact_node.bat',
                             self.gyp_arch],
                            shell=True)
    else:
      if self.platform == 'linux':
        return create_docker_jobspec(
            self.name,
            'tools/dockerfile/grpc_artifact_linux_{}'.format(self.arch),
            'tools/run_tests/build_artifact_node.sh {}'.format(self.gyp_arch))
      else:
        return create_jobspec(self.name,
                              ['tools/run_tests/build_artifact_node.sh',
                               self.gyp_arch])


class ProtocArtifact:
  """Builds protoc and protoc-plugin artifacts"""

  def __init__(self, platform, arch):
    self.name = 'protoc_%s_%s' % (platform, arch)
    self.platform = platform
    self.arch = arch
    self.labels = ['artifact', 'protoc', platform, arch]

  def pre_build_jobspecs(self):
      return []

  def build_jobspec(self):
    if self.platform != 'windows':
      cxxflags = '-DNDEBUG %s' % _ARCH_FLAG_MAP[self.arch]
      ldflags = '%s' % _ARCH_FLAG_MAP[self.arch]
      if self.platform != 'macos':
        ldflags += '  -static-libgcc -static-libstdc++ -s'
      environ={'CONFIG': 'opt',
               'CXXFLAGS': cxxflags,
               'LDFLAGS': ldflags,
               'PROTOBUF_LDFLAGS_EXTRA': ldflags}
      if self.platform == 'linux':
        return create_docker_jobspec(self.name,
            'tools/dockerfile/grpc_artifact_protoc',
            'tools/run_tests/build_artifact_protoc.sh',
            environ=environ)
      else:
        environ['CXXFLAGS'] += ' -std=c++11 -stdlib=libc++ %s' % _MACOS_COMPAT_FLAG
        return create_jobspec(self.name,
            ['tools/run_tests/build_artifact_protoc.sh'],
            environ=environ)
    else:
      raise Exception('Not yet supported')

  def __str__(self):
    return self.name


def targets():
  """Gets list of supported targets"""
  return ([Cls(platform, arch)
           for Cls in (CSharpExtArtifact, NodeExtArtifact)
           for platform in ('linux', 'macos', 'windows')
           for arch in ('x86', 'x64')] +
          [PythonArtifact('linux', 'x86'),
           PythonArtifact('linux', 'x64'),
           PythonArtifact('macos', 'x64'),
           RubyArtifact('linux', 'x86'),
           RubyArtifact('linux', 'x64'),
           RubyArtifact('macos', 'x64'),
           ProtocArtifact('linux', 'x86'),
           ProtocArtifact('linux', 'x64'),
           ProtocArtifact('macos', 'x86'),
           ProtocArtifact('macos', 'x64')])