cmake_minimum_required(VERSION 3.16)
project(ViewDesignEngine VERSION 0.1.0 LANGUAGES CXX)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)

# ── 选项 ──────────────────────────────────────────
option(BUILD_TESTS     "Build unit tests"        ON)
option(BUILD_EXAMPLES  "Build examples"          ON)
option(BUILD_BENCHMARKS "Build benchmarks"       OFF)
option(BUILD_SHARED_LIBS "Build shared library"  OFF)
option(ENABLE_SANITIZERS "Enable ASan/UBSan"     OFF)
option(ENABLE_LTO        "Enable LTO"            ON)

# ── 编译设置 ──────────────────────────────────────
include(cmake/CompilerSettings.cmake)

# ── 依赖 ──────────────────────────────────────────
find_package(Eigen3 3.3 QUIET)
if(NOT Eigen3_FOUND)
    message(STATUS "Eigen3 not found — using FetchContent")
    include(FetchContent)
    FetchContent_Declare(Eigen3
        URL https://gitlab.com/libeigen/eigen/-/archive/3.4.0/eigen-3.4.0.tar.gz
    )
    FetchContent_MakeAvailable(Eigen3)
endif()

# ── 子目录 ────────────────────────────────────────
add_subdirectory(src)

# ── 测试 ──────────────────────────────────────────
if(BUILD_TESTS)
    enable_testing()
    find_package(GTest QUIET)
    if(NOT GTest_FOUND)
        include(FetchContent)
        FetchContent_Declare(googletest
            URL https://github.com/google/googletest/archive/refs/tags/v1.14.0.tar.gz
        )
        set(INSTALL_GTEST OFF CACHE BOOL "" FORCE)
        FetchContent_MakeAvailable(googletest)
    endif()
    add_subdirectory(tests)
endif()

# ── 示例 ──────────────────────────────────────────
# ── Python 绑定 ────────────────────────────────────option(VDE_BUILD_PYTHON "Build Python bindings (pybind11)" OFF)if(VDE_BUILD_PYTHON)    add_subdirectory(python)endif()
if(BUILD_EXAMPLES)
    add_subdirectory(examples)
endif()

# ── 性能测试 ──────────────────────────────────────
if(BUILD_BENCHMARKS)
    find_package(benchmark QUIET)
    if(NOT benchmark_FOUND)
        include(FetchContent)
        FetchContent_Declare(googlebenchmark
            URL https://github.com/google/benchmark/archive/refs/tags/v1.8.0.tar.gz
        )
        set(BENCHMARK_ENABLE_TESTING OFF CACHE BOOL "" FORCE)
        FetchContent_MakeAvailable(googlebenchmark)
    endif()
    add_subdirectory(benchmarks)
endif()

# ── 安装 ──────────────────────────────────────────
include(GNUInstallDirs)
install(DIRECTORY include/ DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
install(TARGETS vde EXPORT ViewDesignEngine-targets)
install(EXPORT ViewDesignEngine-targets DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/ViewDesignEngine)