set(PI05_INCLUDE_DIR ${CMAKE_SOURCE_DIR}/include)
set(PI05_THIRD_PARTY_DIR ${CMAKE_SOURCE_DIR}/third_party)
set(PI05_SENTENCEPIECE_SRC_DIR ${PI05_THIRD_PARTY_DIR}/sentencepiece/src)
set(PI05_GGML_SRC_DIR ${PI05_THIRD_PARTY_DIR}/ggml/src)

# ============================================================================
# Shared core library
# ============================================================================
set(PI05_CORE_SRC_FILES
    build_graph.cpp
    ctx_manager.cpp
    f16_profile.cpp
    graph_runtime.cpp
    model_defs.cpp
    model_loader.cpp
    utils.cpp
    pi05.cpp
)

add_library(pi05_core OBJECT ${PI05_CORE_SRC_FILES})
target_link_libraries(pi05_core PUBLIC ggml)
target_link_libraries(pi05_core PRIVATE sentencepiece-static Threads::Threads)
target_include_directories(pi05_core PUBLIC ${PI05_INCLUDE_DIR})
target_include_directories(pi05_core PRIVATE ${PI05_THIRD_PARTY_DIR})
target_include_directories(pi05_core PRIVATE ${PI05_GGML_SRC_DIR})
target_include_directories(pi05_core PRIVATE ${PI05_SENTENCEPIECE_SRC_DIR})
target_compile_definitions(pi05_core PRIVATE USE_SENTENCEPIECE)
target_compile_features(pi05_core PRIVATE cxx_std_17)
set_target_properties(pi05_core PROPERTIES POSITION_INDEPENDENT_CODE ON)

if (NOT MSVC)
    target_compile_options(pi05_core PRIVATE -Wno-cast-qual)
endif()

# ============================================================================
# CLI executable
# ============================================================================
add_executable(pi05 main.cpp $<TARGET_OBJECTS:pi05_core>)
target_link_libraries(pi05 PUBLIC ggml)
target_link_libraries(pi05 PRIVATE sentencepiece-static Threads::Threads)
target_include_directories(pi05 PUBLIC ${PI05_INCLUDE_DIR})
target_include_directories(pi05 PRIVATE ${PI05_THIRD_PARTY_DIR})
target_include_directories(pi05 PRIVATE ${PI05_GGML_SRC_DIR})
target_include_directories(pi05 PRIVATE ${PI05_SENTENCEPIECE_SRC_DIR})
target_compile_definitions(pi05 PRIVATE USE_SENTENCEPIECE)
target_compile_features(pi05 PRIVATE cxx_std_17)

# ============================================================================
# Python module (pybind11)
# ============================================================================
option(BUILD_PI05_PYTHON "Build Pi0.5 Python module" ON)
if(BUILD_PI05_PYTHON)
    find_package(Python COMPONENTS Interpreter Development REQUIRED)

    execute_process(
        COMMAND ${Python_EXECUTABLE} -c "import pybind11; print(pybind11.get_cmake_dir())"
        OUTPUT_VARIABLE PYBIND11_CMAKE_DIR
        OUTPUT_STRIP_TRAILING_WHITESPACE
        RESULT_VARIABLE PYBIND11_RESULT
    )

    if(NOT PYBIND11_RESULT EQUAL 0)
        message(WARNING "Pi0.5: pybind11 not found via Python, trying system pybind11")
        find_package(pybind11 CONFIG)
    else()
        set(CMAKE_PREFIX_PATH ${CMAKE_PREFIX_PATH} ${PYBIND11_CMAKE_DIR})
        find_package(pybind11 CONFIG REQUIRED)
    endif()

    if(pybind11_FOUND)
        add_library(pi05_py SHARED interface.cpp $<TARGET_OBJECTS:pi05_core>)
        set_target_properties(pi05_py PROPERTIES
            PREFIX ""
            OUTPUT_NAME "pi05"
            SUFFIX ".so"
            POSITION_INDEPENDENT_CODE ON
        )

        target_link_libraries(pi05_py PUBLIC ggml)
        target_link_libraries(pi05_py PRIVATE sentencepiece-static Threads::Threads pybind11::module)
        target_include_directories(pi05_py PUBLIC ${PI05_INCLUDE_DIR})
        target_include_directories(pi05_py PRIVATE ${PI05_THIRD_PARTY_DIR})
        target_include_directories(pi05_py PRIVATE ${PI05_GGML_SRC_DIR})
        target_include_directories(pi05_py PRIVATE ${PI05_SENTENCEPIECE_SRC_DIR})
        target_include_directories(pi05_py PRIVATE ${Python_INCLUDE_DIRS})
        target_compile_definitions(pi05_py PRIVATE USE_SENTENCEPIECE BUILD_PYTHON_BINDINGS)
        target_compile_features(pi05_py PRIVATE cxx_std_17)

        if (NOT MSVC)
            target_compile_options(pi05_py PRIVATE -Wno-cast-qual)
        endif()

        message(STATUS "Pi0.5: Python module target added (pi05.so)")
    else()
        message(WARNING "Pi0.5: pybind11 not found, Python module will not be built")
    endif()
endif()
