# Copyright 2021 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("$dir_pigweed/third_party/ambiq/ambiq.gni")
import("$dir_pigweed/third_party/freertos/freertos.gni")
import("$dir_pigweed/third_party/nanopb/nanopb.gni")
import("$dir_pigweed/third_party/pico_sdk/pi_pico.gni")
import("$dir_pigweed/third_party/smartfusion_mss/mss.gni")
import("$dir_pigweed/third_party/stm32cube/stm32cube.gni")
import("$dir_pw_async2/backend.gni")
import("$dir_pw_build/error.gni")
import("$dir_pw_build/facade.gni")
import("$dir_pw_build/module_config.gni")
import("$dir_pw_build/target_types.gni")
import("$dir_pw_cpu_exception/backend.gni")
import("$dir_pw_docgen/docs.gni")
import("$dir_pw_protobuf_compiler/proto.gni")
import("$dir_pw_unit_test/test.gni")
import("backend.gni")

declare_args() {
  # The build target that overrides the default configuration options for this
  # module. This should point to a source set that provides defines through a
  # public config (which may -include a file or add defines directly).
  pw_system_CONFIG = pw_build_DEFAULT_MODULE_CONFIG
}

config("public_include_path") {
  include_dirs = [ "public" ]
}

# This config moves RPC logging to a separate RPC channel and HDLC
# address. This does two things:
#   * The separate RPC channel allows logging traffic to be treated as
#     if it is being sent to a different client via a separate RPC
#     channel. This illustrates the ability for an RPC server to
#     communicate to multiple clients over multiple physical links.
#   * The separate HDLC address completely isolates typical RPC traffic
#     from logging traffic by communicating to a different HDLC endpoint
#     address. This effectively creates two virtual data pipes over the
#     same physical link.
#
# This is mostly to illustrate pw_rpc's capability to route and multiplex
# traffic.
config("multi_endpoint_rpc_overrides") {
  defines = [
    "PW_SYSTEM_LOGGING_CHANNEL_ID=10000",
    "PW_SYSTEM_LOGGING_RPC_HDLC_ADDRESS=10000",
  ]
}

config("pw_cpu_exception_config") {
  # disable the crash handler entirely if the cpu exception backend has
  # not been set.
  if (pw_cpu_exception_ENTRY_BACKEND == "") {
    defines = [ "PW_SYSTEM_ENABLE_CRASH_HANDLER=0" ]
  }
}

# The Pigweed config pattern requires a pw_source_set to provide the
# configuration defines. This provides the flags in
# multi_endpoint_rpc_overrides.
pw_source_set("multi_endpoint_rpc_config") {
  public_configs = [ ":multi_endpoint_rpc_overrides" ]
}

pw_source_set("config") {
  sources = [ "public/pw_system/config.h" ]
  public_configs = [
    ":public_include_path",
    ":pw_cpu_exception_config",
  ]
  public_deps = [ pw_system_CONFIG ]
  visibility = [ "./*" ]
}

pw_source_set("log") {
  public = [ "public/pw_system/log.h" ]
  public_configs = [ ":public_include_path" ]
  sources = [ "log.cc" ]
  public_deps = [
    "$dir_pw_log_rpc:log_service",
    "$dir_pw_log_rpc:rpc_log_drain_thread",
    "$dir_pw_multisink",
  ]
  deps = [
    ":config",
    "$dir_pw_log_rpc:rpc_log_drain",
    "$dir_pw_sync:lock_annotations",
    "$dir_pw_sync:mutex",
  ]
}

# There is no public part to this backend which does not cause circular
# dependencies, there is only the pw_build_LINK_DEPS "log_backend.impl".
pw_source_set("log_backend") {
}

pw_source_set("log_backend.impl") {
  sources = [ "log_backend.cc" ]
  deps = [
    ":config",
    ":log",
    "$dir_pw_bytes",
    "$dir_pw_chrono:system_clock",
    "$dir_pw_log:proto_utils",
    "$dir_pw_log:pw_log.facade",
    "$dir_pw_log_string:handler.facade",
    "$dir_pw_metric:global",
    "$dir_pw_multisink",
    "$dir_pw_result",
    "$dir_pw_string",
    "$dir_pw_sync:interrupt_spin_lock",
    "$dir_pw_sync:lock_annotations",
    "$dir_pw_tokenizer",
  ]
}

pw_facade("rpc_server") {
  backend = pw_system_RPC_SERVER_BACKEND
  public = [ "public/pw_system/rpc_server.h" ]
  public_configs = [ ":public_include_path" ]
  public_deps = [
    ":config",
    "$dir_pw_rpc:server",
    "$dir_pw_thread:thread_core",
  ]
}

pw_facade("io") {
  backend = pw_system_IO_BACKEND
  public_configs = [ ":public_include_path" ]
  public = [ "public/pw_system/io.h" ]
  public_deps = [ "$dir_pw_stream" ]
}

pw_facade("device_handler") {
  backend = pw_system_DEVICE_HANDLER
  public_configs = [ ":public_include_path" ]
  public = [ "public/pw_system/device_handler.h" ]
  public_deps = [ "$dir_pw_snapshot:snapshot_proto.pwpb" ]
}

pw_source_set("unknown_device_handler") {
  sources = [ "unknown_device_handler.cc" ]
  deps = [ ":device_handler.facade" ]
}

pw_source_set("init") {
  public_configs = [ ":public_include_path" ]
  public = [ "public/pw_system/init.h" ]
  sources = [ "init.cc" ]
  deps = [
    ":device_service",
    ":file_manager",
    ":file_service",
    ":log",
    ":rpc_server",
    ":target_hooks.facade",
    ":thread_snapshot_service",
    ":trace_service",
    ":transfer_service",
    ":work_queue",
    "$dir_pw_metric:global",
    "$dir_pw_metric:metric_service_pwpb",
    "$dir_pw_rpc/pwpb:echo_service",
    "$dir_pw_thread:thread",
    "$dir_pw_trace",
  ]
  if (pw_cpu_exception_ENTRY_BACKEND != "") {
    deps += [
      ":crash_handler",
      ":crash_snapshot",
    ]
  }

  # disable include checking, as there are conditional includes dependent on
  # whether the pw_cpu_exception_ENTRY_BACKEND is set.
  check_includes = false
}

pw_source_set("hdlc_rpc_server") {
  sources = [ "hdlc_rpc_server.cc" ]
  deps = [
    ":config",
    ":io",
    ":rpc_server.facade",
    "$dir_pw_assert",
    "$dir_pw_hdlc:decoder",
    "$dir_pw_hdlc:default_addresses",
    "$dir_pw_hdlc:rpc_channel_output",
    "$dir_pw_log",
    "$dir_pw_sync:mutex",
    "$dir_pw_trace",
  ]
}

pw_source_set("work_queue") {
  public_configs = [ ":public_include_path" ]
  public = [ "public/pw_system/work_queue.h" ]
  sources = [ "work_queue.cc" ]
  public_deps = [ "$dir_pw_work_queue" ]
  deps = [ ":config" ]
}

pw_source_set("sys_io_target_io") {
  sources = [ "sys_io_target_io.cc" ]
  deps = [
    ":io.facade",
    "$dir_pw_stream",
    "$dir_pw_stream:sys_io_stream",
  ]
}

pw_source_set("socket_target_io") {
  sources = [ "socket_target_io.cc" ]
  deps = [
    ":config",
    ":io.facade",
    "$dir_pw_assert",
    "$dir_pw_stream",
    "$dir_pw_stream:socket_stream",
  ]
}

pw_source_set("transfer_handlers") {
  public = [ "public/pw_system/transfer_handlers.h" ]
  public_configs = [ ":public_include_path" ]
  public_deps = [
    ":config",
    "$dir_pw_persistent_ram",
    "$dir_pw_trace_tokenized:config",
    "$dir_pw_transfer",
  ]
  sources = [ "transfer_handlers.cc" ]
  deps = []
}

pw_source_set("file_manager") {
  public = [ "public/pw_system/file_manager.h" ]
  public_configs = [ ":public_include_path" ]
  public_deps = [
    ":config",
    ":transfer_handlers",
    "$dir_pw_file:flat_file_system",
    "$dir_pw_persistent_ram:flat_file_system_entry",
  ]
  sources = [ "file_manager.cc" ]
  deps = [ ":trace_service" ]
  if (pw_cpu_exception_ENTRY_BACKEND != "") {
    deps += [ ":crash_snapshot" ]
  }

  # disable include checking, as there are conditional includes dependent on
  # whether the pw_cpu_exception_ENTRY_BACKEND is set.
  check_includes = false
}

pw_source_set("transfer_service") {
  public = [ "public/pw_system/transfer_service.h" ]
  public_configs = [ ":public_include_path" ]
  public_deps = [ "$dir_pw_transfer" ]
  sources = [ "transfer_service.cc" ]
  deps = [ ":file_manager" ]
}

pw_source_set("file_service") {
  public = [ "public/pw_system/file_service.h" ]
  public_configs = [ ":public_include_path" ]
  public_deps = []
  sources = [ "file_service.cc" ]
  deps = [ ":file_manager" ]
}

pw_source_set("trace_service") {
  public = [ "public/pw_system/trace_service.h" ]
  public_configs = [ ":public_include_path" ]
  public_deps = [ ":transfer_handlers" ]
  sources = [ "trace_service.cc" ]
  deps = [
    "$dir_pw_persistent_ram",
    "$dir_pw_trace_tokenized:trace_service_pwpb",
  ]
}

pw_source_set("crash_handler") {
  public = [ "public/pw_system/crash_handler.h" ]
  public_configs = [ ":public_include_path" ]
  public_deps = []
  sources = [ "crash_handler.cc" ]
  deps = [
    ":crash_snapshot",
    ":device_handler",
    ":log",
    "$dir_pw_assert_trap:message",
    "$dir_pw_cpu_exception:handler",
  ]
}

pw_source_set("crash_snapshot") {
  public = [ "public/pw_system/crash_snapshot.h" ]
  public_configs = [ ":public_include_path" ]
  public_deps = [
    ":transfer_handlers",
    "$dir_pw_cpu_exception:entry",
    "$dir_pw_persistent_ram",
    "$dir_pw_snapshot:snapshot_proto.pwpb",
  ]
  sources = [ "crash_snapshot.cc" ]
  deps = [
    ":device_handler",
    ":log",
    "$dir_pw_multisink:util",
    "$dir_pw_snapshot:uuid",
  ]
}

pw_proto_library("device_service_proto") {
  sources = [ "pw_system_protos/device_service.proto" ]
  inputs = [ "pw_system_protos/device_service.options" ]
  deps = []
}

pw_source_set("device_service_pwpb") {
  public = [ "public/pw_system/device_service_pwpb.h" ]
  public_configs = [ ":public_include_path" ]
  public_deps = []
  sources = [ "device_service_pwpb.cc" ]
  public_deps = [ ":device_service_proto.pwpb_rpc" ]
  deps = [ ":device_handler" ]
}

pw_source_set("device_service") {
  public = [ "public/pw_system/device_service.h" ]
  public_configs = [ ":public_include_path" ]
  public_deps = []
  sources = [ "device_service.cc" ]
  deps = [ ":device_service_pwpb" ]
}

pw_source_set("thread_snapshot_service") {
  public = [ "public/pw_system/thread_snapshot_service.h" ]
  public_configs = [ ":public_include_path" ]
  public_deps = [ "$dir_pw_rpc:server" ]
  sources = [ "thread_snapshot_service.cc" ]
  deps = [ "$dir_pw_thread:thread_snapshot_service" ]
}

pw_facade("target_hooks") {
  backend = pw_system_TARGET_HOOKS_BACKEND
  public = [ "public/pw_system/target_hooks.h" ]
  public_deps = [ "$dir_pw_thread:thread" ]
  public_configs = [ ":public_include_path" ]
}

if (pw_system_TARGET_HOOKS_BACKEND == "") {
  # Do nothing, prevents errors from trying to parse pw_system_TARGET_HOOKS_BACKEND as a
  # build target when it's unset.
} else if (get_label_info(pw_system_TARGET_HOOKS_BACKEND,
                          "label_no_toolchain") ==
           get_label_info(":stl_target_hooks", "label_no_toolchain")) {
  pw_source_set("stl_target_hooks") {
    deps = [
      ":config",
      "$dir_pw_thread:thread",
      "$dir_pw_thread_stl:thread",
    ]
    sources = [ "stl_target_hooks.cc" ]
  }
} else if (get_label_info(pw_system_TARGET_HOOKS_BACKEND,
                          "label_no_toolchain") ==
           get_label_info(":freertos_target_hooks", "label_no_toolchain")) {
  pw_source_set("freertos_target_hooks") {
    deps = [
      ":config",
      ":init",
      "$dir_pw_third_party/freertos",
      "$dir_pw_thread:thread",
      "$dir_pw_thread_freertos:thread",
    ]
    sources = [ "freertos_target_hooks.cc" ]
  }
}

group("pw_system") {
  public_deps = [
    ":init",
    ":io",
    ":log",
    ":rpc_server",
    ":work_queue",
  ]
  deps = [ ":target_hooks" ]
}

pw_source_set("async") {
  public = [ "public/pw_system/system.h" ]
  public_configs = [ ":public_include_path" ]
  sources = [
    "pw_system_private/threads.h",
    "system.cc",
    "threads.cc",
  ]
  public_deps = [
    "$dir_pw_allocator:allocator",
    "$dir_pw_async2:dispatcher",
    "$dir_pw_channel",
    "$dir_pw_rpc:server",
  ]
  deps = [
    ":async_packet_io",
    ":file_manager",
    ":file_service",
    ":log",
    ":thread_snapshot_service",
    ":transfer_service",
    ":work_queue",
    "$dir_pw_allocator:best_fit_block_allocator",
    "$dir_pw_allocator:synchronized_allocator",
    "$dir_pw_async2:allocate_task",
    "$dir_pw_async2:pend_func_task",
    "$dir_pw_hdlc:router",
    "$dir_pw_multibuf:simple_allocator",
    "$dir_pw_rpc/pwpb:echo_service",
    "$dir_pw_sync:interrupt_spin_lock",
    "$dir_pw_thread:thread",
  ]
  if (pw_cpu_exception_ENTRY_BACKEND != "") {
    deps += [
      ":crash_handler",
      ":crash_snapshot",
    ]
  }
}

pw_executable("system_example") {
  # TODO: b/303282642 - Remove this testonly
  testonly = pw_unit_test_TESTONLY

  sources = [ "example_user_app_init.cc" ]
  deps = [
    ":pw_system",
    "$dir_pw_log",
    "$dir_pw_thread:sleep",
    "$dir_pw_trace",
    "$dir_pw_unit_test:rpc_service",

    # Adds a test that the test server can run.
    "$dir_pw_status:status_test.lib",
    "$dir_pw_string:string_builder_test.lib",
  ]
}

pw_executable("system_async_host_example") {
  sources = [ "system_async_host_example.cc" ]
  deps = [
    ":async",
    "$dir_pw_channel:epoll_channel",
    "$dir_pw_multibuf:testing",
  ]
}

pw_source_set("async_packet_io") {
  public_configs = [ ":public_include_path" ]
  public = [ "public/pw_system/internal/async_packet_io.h" ]
  sources = [ "async_packet_io.cc" ]
  public_deps = [
    "$dir_pw_async2:dispatcher",
    "$dir_pw_channel:forwarding_channel",
    "$dir_pw_containers:inline_var_len_entry_queue",
    "$dir_pw_hdlc:router",
    "$dir_pw_multibuf:simple_allocator",
    "$dir_pw_rpc:server",
    "$dir_pw_sync:lock_annotations",
    "$dir_pw_sync:mutex",
    "$dir_pw_sync:thread_notification",
    "$dir_pw_thread:thread",
    dir_pw_allocator,
    dir_pw_channel,
    dir_pw_multibuf,
  ]
  deps = [
    ":config",
    dir_pw_assert,
    dir_pw_log,
  ]
  visibility = [ "./*" ]
}

pw_test("async_packet_io_test") {
  sources = [ "async_packet_io_test.cc" ]
  deps = [
    ":async_packet_io",
    "$dir_pw_allocator:testing",
    "$dir_pw_channel:loopback_channel",
    "$dir_pw_multibuf:testing",
  ]

  # TODO: b/317922402 - Run on Windows when thread detaching is supported.
  enable_if = host_os != "win" && pw_async2_DISPATCHER_BACKEND != ""
}

pw_test("system_async_test") {
  sources = [ "system_async_test.cc" ]
  deps = [
    ":async",
    "$dir_pw_allocator:testing",
    "$dir_pw_channel:loopback_channel",
    "$dir_pw_multibuf:testing",
  ]

  # TODO: b/317922402 - Run on Windows when thread detaching is supported.
  enable_if = host_os != "win" && pw_async2_DISPATCHER_BACKEND != ""
}

group("system_examples") {
  # TODO: b/303282642 - Remove this testonly
  testonly = pw_unit_test_TESTONLY

  deps = [ ":system_example($dir_pigweed/targets/host_device_simulator:host_device_simulator.speed_optimized)" ]
  if (dir_pw_third_party_stm32cube_f4 != "" &&
      dir_pw_third_party_freertos != "") {
    deps += [ ":system_example($dir_pigweed/targets/stm32f429i_disc1_stm32cube:stm32f429i_disc1_stm32cube.size_optimized)" ]
    deps += [ ":system_example($dir_pigweed/targets/stm32f429i_disc1_stm32cube:stm32f429i_disc1_stm32cube_clang.size_optimized)" ]
  }
  if (dir_pw_third_party_smartfusion_mss != "" &&
      dir_pw_third_party_freertos != "") {
    deps += [
      ":system_example($dir_pigweed/targets/emcraft_sf2_som:emcraft_sf2_som.size_optimized)",
      ":system_example($dir_pigweed/targets/emcraft_sf2_som:emcraft_sf2_som.speed_optimized)",
      ":system_example($dir_pigweed/targets/emcraft_sf2_som:emcraft_sf2_som_debug.debug)",
    ]
  }
  if (PICO_SRC_DIR != "" && dir_pw_third_party_freertos != "") {
    deps += [
      ":system_example($dir_pigweed/targets/rp2040:rp2040.debug)",
      ":system_example($dir_pigweed/targets/rp2040:rp2040.size_optimized)",
    ]
  }
  if (dir_pw_third_party_ambiq_SDK != "" && dir_pw_third_party_freertos != "") {
    deps += [
      ":system_example($dir_pigweed/targets/apollo4_pw_system:apollo4_pw_system.debug)",
      ":system_example($dir_pigweed/targets/apollo4_pw_system:apollo4_pw_system.size_optimized)",
    ]
  }
}

pw_doc_group("docs") {
  sources = [
    "cli.rst",
    "docs.rst",
  ]
  inputs = [
    "Kconfig",
    "system_async_test.cc",
  ]
}

pw_test_group("tests") {
  tests = [
    ":async_packet_io_test",
    ":system_async_test",
  ]
}