cmake_minimum_required(VERSION 3.10)
project(CeresWrapper VERSION 1.0.0 LANGUAGES CXX)

# Set C++ standard
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)

# Build shared library
set(CMAKE_POSITION_INDEPENDENT_CODE ON)

# Find required packages
find_package(Ceres REQUIRED)
find_package(Eigen3 REQUIRED)

# Include directories
include_directories(
    ${CERES_INCLUDE_DIRS}
    ${EIGEN3_INCLUDE_DIR}
)

# Source files
set(SOURCES
    ceres_wrapper.cc
)

# Header files
set(HEADERS
    ceres_wrapper.h
)

# Create shared library
add_library(ceres_wrapper SHARED ${SOURCES} ${HEADERS})

# Set library properties
set_target_properties(ceres_wrapper PROPERTIES
    VERSION ${PROJECT_VERSION}
    SOVERSION 1
    PUBLIC_HEADER "${HEADERS}"
    CXX_VISIBILITY_PRESET hidden
    VISIBILITY_INLINES_HIDDEN ON
)

# Add compile definition for export macro
target_compile_definitions(ceres_wrapper PRIVATE CERES_WRAPPER_BUILDING)

# Link libraries
target_link_libraries(ceres_wrapper
    PUBLIC
        Ceres::ceres
        Eigen3::Eigen
)

# Compiler-specific options
if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
    target_compile_options(ceres_wrapper PRIVATE
        -Wall
        -Wextra
        -Wpedantic
        -fvisibility=hidden
    )
endif()

# Install rules
install(TARGETS ceres_wrapper
    LIBRARY DESTINATION lib
    ARCHIVE DESTINATION lib
    PUBLIC_HEADER DESTINATION include/ceres_wrapper
)

# Install header
install(FILES ${HEADERS}
    DESTINATION include/ceres_wrapper
)

# ============================================================================
# Test executable
# ============================================================================

option(BUILD_TESTS "Build test executable" ON)

if(BUILD_TESTS)
    enable_language(C)
    
    # Test source
    add_executable(ceres_wrapper_test
        ceres_wrapper_test.c
    )
    
    # Link test executable
    target_link_libraries(ceres_wrapper_test
        PRIVATE
            ceres_wrapper
            Ceres::ceres
    )
    
    # Include directories for test
    target_include_directories(ceres_wrapper_test PRIVATE
        ${CMAKE_CURRENT_SOURCE_DIR}
        ${CERES_INCLUDE_DIRS}
    )
    
    # Add compile definition for Ceres include if needed
    if(CERES_INCLUDE_DIRS)
        target_compile_definitions(ceres_wrapper_test PRIVATE
            CERES_INCLUDE_DIR="${CERES_INCLUDE_DIRS}"
        )
    endif()
    
    # Add test to CTest
    add_test(NAME CeresWrapperTest COMMAND ceres_wrapper_test)
    
    message(STATUS "  Tests: Enabled")
else()
    message(STATUS "  Tests: Disabled")
endif()

# Build configuration summary
message(STATUS "CeresWrapper Configuration:")
message(STATUS "  Version: ${PROJECT_VERSION}")
message(STATUS "  C++ Standard: ${CMAKE_CXX_STANDARD}")
message(STATUS "  Ceres Include: ${CERES_INCLUDE_DIRS}")
message(STATUS "  Eigen3 Include: ${EIGEN3_INCLUDE_DIR}")
message(STATUS "  Build Type: ${CMAKE_BUILD_TYPE}")
message(STATUS "  Install Prefix: ${CMAKE_INSTALL_PREFIX}")