cmake_minimum_required(VERSION 2.8.12)

project(cspot)

# Configurable options
set(CSPOT_EXTERNAL_BELL "" CACHE STRING "External bell library target name, optional")

# CMake options
set(CMAKE_CXX_STANDARD 17)

# Main library sources
file(GLOB SOURCES "src/*.cpp" "src/*.c")

# Use externally specified bell library or the submodule
if(CSPOT_EXTERNAL_BELL)
    list(APPEND EXTRA_LIBS ${CSPOT_EXTERNAL_BELL})
else()
    add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/bell)
    list(APPEND EXTRA_LIBS bell)
endif()

# Add Apple Bonjour compatibility library for Linux
if(UNIX AND NOT APPLE)
    list(APPEND EXTRA_LIBS dns_sd)
    # TODO: migrate from this to native linux mDNS
endif()

if (GENERATE_PROTOS)
	file(GLOB SOURCES "src/*.cpp" "src/*.c")
	set(NANOPB_OPTIONS "-I${CMAKE_CURRENT_SOURCE_DIR}")
	set(PROTOS protobuf/authentication.proto protobuf/mercury.proto protobuf/keyexchange.proto protobuf/spirc.proto protobuf/metadata.proto)
	message(${PROTOS})
	message("building protobuf")
	message(${CMAKE_CURRENT_SOURCE_DIR})
	nanopb_generate_cpp(PROTO_SRCS PROTO_HDRS RELPATH ${CMAKE_CURRENT_SOURCE_DIR} ${PROTOS})
	add_custom_target(generate_proto_sources DEPENDS ${PROTO_SRCS} ${PROTO_HDRS})
	set_source_files_properties(${PROTO_SRCS} ${PROTO_HDRS} PROPERTIES GENERATED TRUE)
	set(GENERATED_INCLUDES ${CMAKE_CURRENT_BINARY_DIR})
else()
	file(GLOB SOURCES "src/*.cpp" "src/*.c" "protobuf/*.c")
	message("BEWARE => NOT GENERATING PROTOBUF")
	set(GENERATED_INCLUDES ".")
endif()

add_library(cspot STATIC ${SOURCES} ${PROTO_SRCS})
# PUBLIC to propagate includes from bell to cspot dependents
target_compile_definitions(bell PUBLIC PB_ENABLE_MALLOC)
target_compile_definitions(bell PUBLIC PB_FIELD_32BIT)
target_link_libraries(cspot PUBLIC ${EXTRA_LIBS})
target_include_directories(cspot PUBLIC "include" ${GENERATED_INCLUDES} ${NANOPB_INCLUDE_DIRS})