include_defs('//onos.defs')
include_defs('//bucklets/onos.bucklet')


DEFAULT_PROTOC_VERSION = '3.2.0'
DEFAULT_GRPC_PLUGIN_VERSION = '1.3.1'

PROTOC_RELEASE_BASE_URL = "https://github.com/google/protobuf/releases/download"
GRPC_PLUGIN_BASE_URL = "https://repo1.maven.org/maven2/io/grpc/protoc-gen-grpc-java"

PROTOC_SHA1S = {
    "protoc-3.0.2-linux-x86_64.zip":"779ed606f524eb2c8c116b0fce7a3bc6507769e7",
    "protoc-3.0.2-osx-x86_64.zip":"f71d97affca4ffe32747772539c0bcbf76c9dc9b",
    "protoc-3.2.0-linux-x86_64.zip":"f418d246d183a534d9bd749e614f639a55f6829b",
    "protoc-3.2.0-osx-x86_64.zip":"81f4fac3200ba2cb12a98df0a9ee4d1c584e9210",
}

GRPC_JAVA_SHA1S = {
    "protoc-gen-grpc-java-1.3.1-linux-x86_64.exe":"9598b00ad0f41a6bd6aeb01f647903dbc62792cc",
    "protoc-gen-grpc-java-1.3.1-osx-x86_64.exe":"f4eccb96524b8b9f152024890550d9b88398b8cd"
}

#Returns the string for the OS and architecture of the system of the form 'OS-ARCH'
def get_system_arch():
    import platform
    os = platform.system().lower()
    arch = platform.machine()
    if os == "darwin":
        os = "osx"
    return "%s-%s" % ( os, arch)

def fetch_protoc(
        version
    ):
    file_name = "protoc-%s-%s.zip" % (version, get_system_arch())
    if file_name not in PROTOC_SHA1S:
        raise Exception('Cannot download %s, architecture or version not supported' % file_name)
    remote_file(
        name = 'protoc-release-' + version,
        url = PROTOC_RELEASE_BASE_URL + '/v' + version + '/' + file_name,
        sha1 = PROTOC_SHA1S[file_name],
    )
    genrule(
        name = 'protoc-exe-' + version,
        bash = 'jar xf $(location :protoc-release-' + version + ') bin/protoc && ' +
                'mv bin/protoc $OUT && ' +
                'chmod +x $OUT',
        out = 'protoc.exe',
        executable = True,
        visibility = [ "PUBLIC" ],
    )
    genrule(
        name = 'protoc-lib-' + version,
        bash = 'jar xf $(location :protoc-release-' + version + ') include && mv include $OUT',
        out = 'include',
        visibility = [ "PUBLIC" ],
    )

def fetch_grpc_plugin(
        version
):
    file_name = "protoc-gen-grpc-java-%s-%s.exe" % (version, get_system_arch())
    if file_name not in GRPC_JAVA_SHA1S:
        raise Exception('Cannot download %s, architecture or version not supported' % file_name)
    remote_file(
        name = 'grpc-plugin-binary-' + version,
        url = GRPC_PLUGIN_BASE_URL + '/' + version + '/' + file_name,
        sha1 = GRPC_JAVA_SHA1S[file_name],
    )
    genrule(
        name = 'grpc-plugin-exe-' + version,
        bash = 'cp $(location :grpc-plugin-binary-' + version + ') $OUT && chmod +x $OUT',
        executable = True,
        visibility = [ "PUBLIC" ],
        out = 'grpc-plugin.exe',
    )

def _get_name():
    base_path = get_base_path()
    return ONOS_ARTIFACT_BASE + base_path.replace('/', '-') #TODO Unix-separator

def grpc_jar(
    name = None,
    deps = [],
    #NOTE: if targeting a directory also built with maven this path MUST end in
    # /proto because maven plugin interprets imports relative to the proto
    # directory and BUCK interprets imports relative to the last directory
    # listed in the first listed proto_path which contains the specified
    # file
    proto_paths = [],
    srcs = [],
    src_string = '', # Useful to build proto files external to the ONOS sources, using BUCK's environment variables.
    proto_match_patterns = [ "src/main/proto/**/*.proto" ],
    protoc_version = DEFAULT_PROTOC_VERSION,
    plugin_version = DEFAULT_GRPC_PLUGIN_VERSION,
    include_std_lib = False,
    **kwargs
    ):

    #Get the correct name for the protoc compilation call
    if name is None:
        name = _get_name()

    # Create the string for the proto_path arguments (order matters, similar to classpath)

    if include_std_lib:
        # Add protoc standard lib to the includes
        proto_paths = ['$(location //incubator/protobuf-dependencies:protoc-lib-' + protoc_version + ')'] + proto_paths

    if len(proto_paths) != 0:
        proto_paths_string = "-I=" + reduce(lambda a,b:  a +" -I=" + b, proto_paths)
    else:
        proto_paths_string = ""
    protoc = name + '-protoc'

    genrule(
        name = protoc,
        srcs = glob(proto_match_patterns),
        out = 'grpc.src.zip',
        cmd = '$(location //buck-tools:grpc) $OUT '
              + '\"' + proto_paths_string + '\" '
              + '$(location //incubator/protobuf-dependencies:protoc-exe-'+ protoc_version + ') '
              + '$(location //incubator/grpc-dependencies:grpc-plugin-exe-' + plugin_version + ') '
              + '$SRCS' + src_string,
    )

    osgi_jar(
        name = name,
        srcs = [ ':' + protoc ],
        deps = deps + [ ':' + protoc ],
        do_javadocs = False,
        do_checkstyle = False,
        **kwargs
    )