# Copyright 2020 The Pigweed Authors
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy of
# the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under
# the License.

import("//build_overrides/pigweed.gni")

import("$dir_pw_build/target_types.gni")
import("$dir_pw_docgen/docs.gni")
import("$dir_pw_log/backend.gni")
import("$dir_pw_tokenizer/backend.gni")
import("$dir_pw_unit_test/facade_test.gni")
import("$dir_pw_unit_test/test.gni")

config("public_includes") {
  include_dirs = [ "public" ]
  visibility = [ ":*" ]
}

config("backend_config") {
  include_dirs = [ "public_overrides" ]
  visibility = [ ":*" ]
}

# This target provides the log_tokenized.h header, which implements the pw_log
# backend.
#
# This target depends on the pw_tokenizer facade target
# (dir_pw_tokenizer:global_handler_with_payload.facade) to avoid circular
# dependencies. The dependency graph for pw_log_tokenized is the following:
#
#   pw_log:facade <---   :pw_log_tokenized
#        ^            \      ^       ^
#        |             \    /         \
#   -> pw_log -> :log_backend --> pw_tokenizer:global_handler_with_payload
#
pw_source_set("pw_log_tokenized") {
  public_configs = [ ":public_includes" ]
  public_deps = [
    "$dir_pw_log:facade",
    "$dir_pw_tokenizer:global_handler_with_payload.facade",
    dir_pw_preprocessor,
  ]
  public = [ "public/pw_log_tokenized/log_tokenized.h" ]
}

# This target provides the backend for pw_log.
pw_source_set("log_backend") {
  public_configs = [ ":backend_config" ]
  public_deps = [ ":pw_log_tokenized" ]
  public = [ "public_overrides/pw_log_backend/log_backend.h" ]
  deps = [ "$dir_pw_tokenizer:global_handler_with_payload" ]
}

# This target provides a backend for pw_tokenizer that encodes tokenized logs as
# Base64, encodes them into HDLC frames, and writes them over sys_io.
pw_source_set("base64_over_hdlc") {
  public_configs = [ ":public_includes" ]
  public = [ "public/pw_log_tokenized/base64_over_hdlc.h" ]
  sources = [ "base64_over_hdlc.cc" ]
  deps = [
    "$dir_pw_hdlc:encoder",
    "$dir_pw_stream:sys_io_stream",
    "$dir_pw_tokenizer:base64",
    "$dir_pw_tokenizer:global_handler_with_payload.facade",
  ]
}

pw_test_group("tests") {
  tests = [ ":log_tokenized_test" ]
}

pw_facade_test("log_tokenized_test") {
  build_args = {
    # The test provides pw_tokenizer_GLOBAL_HANDLER_WITH_PAYLOAD_BACKEND in the
    # .cc file, but we can't depend on the test as it creates a circular
    # dependency.
    pw_tokenizer_GLOBAL_HANDLER_WITH_PAYLOAD_BACKEND = "$dir_pw_build:empty"
  }
  sources = [ "test.cc" ]
  deps = [
    ":log_backend",
    ":pw_log_tokenized",
  ]
  enable_if = pw_log_BACKEND == "$dir_pw_log_tokenized:log_backend"
}

pw_doc_group("docs") {
  sources = [ "docs.rst" ]
}