cmake_minimum_required(VERSION 3.24)
project(TargetExposureControl VERSION 1.1.0 LANGUAGES CXX)

include(GNUInstallDirs)
include(CMakePackageConfigHelpers)
find_package(OpenCV 4 REQUIRED COMPONENTS core imgproc)

add_library(target_exposure_control STATIC
    src/config.cpp src/metering.cpp src/history.cpp src/predictor.cpp
    src/controller.cpp src/exposure_control.cpp)
add_library(TargetExposureControl::Control ALIAS target_exposure_control)
set_target_properties(target_exposure_control PROPERTIES EXPORT_NAME Control
    POSITION_INDEPENDENT_CODE ON CXX_EXTENSIONS OFF)
target_compile_features(target_exposure_control PUBLIC cxx_std_17)
target_include_directories(target_exposure_control PUBLIC
    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
target_link_libraries(target_exposure_control PUBLIC ${OpenCV_LIBS})

function(tec_warnings target)
    if(MSVC)
        target_compile_options(${target} PRIVATE /W4 /permissive- /utf-8)
    else()
        target_compile_options(${target} PRIVATE -Wall -Wextra -Wpedantic)
    endif()
endfunction()
tec_warnings(target_exposure_control)

option(TEC_BUILD_TESTS "Build deterministic offline tests" ${PROJECT_IS_TOP_LEVEL})
option(TEC_BUILD_EXAMPLES "Build the minimal simulated caller" ${PROJECT_IS_TOP_LEVEL})
if(TEC_BUILD_TESTS)
    enable_testing()
    add_executable(target_exposure_tests tests/tests.cpp)
    target_link_libraries(target_exposure_tests PRIVATE TargetExposureControl::Control)
    tec_warnings(target_exposure_tests)
    foreach(group IN ITEMS metering stateless history prediction controller states recovery lifecycle feedback config)
        add_test(NAME tec_${group} COMMAND target_exposure_tests ${group})
        set_tests_properties(tec_${group} PROPERTIES TIMEOUT 30)
    endforeach()
endif()
if(TEC_BUILD_EXAMPLES)
    add_executable(target_exposure_example examples/minimal.cpp)
    target_link_libraries(target_exposure_example PRIVATE TargetExposureControl::Control)
    tec_warnings(target_exposure_example)
    if(TEC_BUILD_TESTS)
        add_test(NAME tec_minimal_example COMMAND target_exposure_example)
        set_tests_properties(tec_minimal_example PROPERTIES TIMEOUT 30)
    endif()
endif()

install(TARGETS target_exposure_control EXPORT TargetExposureControlTargets
    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
install(DIRECTORY include/ DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
install(EXPORT TargetExposureControlTargets NAMESPACE TargetExposureControl::
    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/TargetExposureControl)
configure_package_config_file(cmake/TargetExposureControlConfig.cmake.in
    ${CMAKE_CURRENT_BINARY_DIR}/TargetExposureControlConfig.cmake
    INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/TargetExposureControl)
write_basic_package_version_file(${CMAKE_CURRENT_BINARY_DIR}/TargetExposureControlConfigVersion.cmake
    VERSION ${PROJECT_VERSION} COMPATIBILITY SameMajorVersion)
install(FILES ${CMAKE_CURRENT_BINARY_DIR}/TargetExposureControlConfig.cmake
    ${CMAKE_CURRENT_BINARY_DIR}/TargetExposureControlConfigVersion.cmake
    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/TargetExposureControl)
install(FILES README.md 实施记录.md
    DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/doc/TargetExposureControl)
install(FILES docs/控制与状态说明.md
    DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/doc/TargetExposureControl/docs)
install(FILES examples/minimal.cpp examples/static_station_config.hpp
    DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/doc/TargetExposureControl/examples)