cmake_minimum_required(VERSION 3.28)
cmake_policy(SET CMP0167 NEW)  # Suppress FindBoost removal warning

# ── CUDA is optional (not available on macOS) ───────────────────
include(CheckLanguage)
check_language(CUDA)
if(CMAKE_CUDA_COMPILER)
    project(ANSCORE LANGUAGES C CXX CUDA)
    set(ANSCORE_HAS_CUDA ON)
    set(CMAKE_CUDA_STANDARD 20)
    set(CMAKE_CUDA_STANDARD_REQUIRED ON)
    set(CMAKE_CUDA_ARCHITECTURES 75 80 86 87 88 89 90 100)
    if(MSVC)
        set(CMAKE_CUDA_FLAGS "${CMAKE_CUDA_FLAGS} --use-fast-math -Xcompiler=/utf-8")
    else()
        set(CMAKE_CUDA_FLAGS "${CMAKE_CUDA_FLAGS} --use-fast-math")
    endif()
else()
    project(ANSCORE LANGUAGES C CXX)
    set(ANSCORE_HAS_CUDA OFF)
    message(WARNING "CUDA not found — GPU-accelerated modules will be limited")
endif()

# ── Platform detection ──────────────────────────────────────────
if(WIN32)
    set(ANSCORE_PLATFORM "windows")
elseif(APPLE)
    set(ANSCORE_PLATFORM "macos")
else()
    set(ANSCORE_PLATFORM "linux")
endif()
message(STATUS "ANSCORE platform: ${ANSCORE_PLATFORM}, CUDA: ${ANSCORE_HAS_CUDA}")

# ── Global Settings ──────────────────────────────────────────────
set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_POSITION_INDEPENDENT_CODE ON)

# Output all binaries to a single directory
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)

# ── Compiler Configuration ──────────────────────────────────────
if(MSVC)
    # Dynamic CRT (/MD) — matches original VS projects and prebuilt libs like HWiNFO
    set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>DLL")

    # Apply MSVC flags only to C/C++ (not CUDA — nvcc doesn't understand them)
    add_compile_options(
        "$<$<COMPILE_LANGUAGE:C,CXX>:/W3>"
        "$<$<COMPILE_LANGUAGE:C,CXX>:/utf-8>"
        "$<$<AND:$<COMPILE_LANGUAGE:C,CXX>,$<NOT:$<CONFIG:MINSIZEREL>>>:/Zi>"
    )
    add_link_options(
        "$<$<NOT:$<CONFIG:DEBUG>>:/DEBUG:FULL>"
        "$<$<NOT:$<CONFIG:DEBUG>>:/OPT:REF>"
        "$<$<NOT:$<CONFIG:DEBUG>>:/OPT:ICF>"
    )
    add_compile_definitions(_CRT_SECURE_NO_WARNINGS _WINSOCK_DEPRECATED_NO_WARNINGS)
elseif(CMAKE_CXX_COMPILER_ID MATCHES "Clang|GNU")
    add_compile_options(-Wall -Wextra -Wno-unused-parameter)
    if(NOT APPLE)
        add_link_options(-Wl,--as-needed)
    endif()
endif()

# ── DebugView logging toggle ────────────────────────────────────
# When ON, every ANS_DBG(...) call across the whole tree expands to an
# OutputDebugStringA() call visible in Sysinternals DebugView (Dbgview.exe).
# This is the single switch for verbose runtime diagnostics in ANSLPR,
# ANSCV (RTSP lifecycle, HW decoder auto-config), ANSODEngine (NV12 fast
# path, ORT/TRT engine selection), ANSFR (face recognizer state), etc.
#
# Enable it to diagnose field issues (e.g. "ALPR worked for a while then
# stopped"), then turn it back OFF for production because every ANS_DBG
# call adds a kernel round-trip and string formatting cost.
#
# Usage:
#   cmake -B build -DANSCORE_DEBUGVIEW=ON    # enable
#   cmake -B build -DANSCORE_DEBUGVIEW=OFF   # disable (default)
#
# Or toggle in CLion/VS: edit the cache variable ANSCORE_DEBUGVIEW.
option(ANSCORE_DEBUGVIEW "Enable ANS_DBG OutputDebugString logging for DebugView" OFF)
if(ANSCORE_DEBUGVIEW)
    add_compile_definitions(ANSCORE_DEBUGVIEW=1)
    message(STATUS "ANSCORE_DEBUGVIEW = ON  — ANS_DBG verbose logging ENABLED (DebugView)")
else()
    message(STATUS "ANSCORE_DEBUGVIEW = OFF — ANS_DBG verbose logging disabled (production)")
endif()

# ── External Dependencies ───────────────────────────────────────
include(cmake/Dependencies.cmake)

# ── Subprojects (ordered by dependency) ─────────────────────────

# Core — licensing & infrastructure
add_subdirectory(core/anslicensing)
add_subdirectory(core/ANSLicensingSystem)
add_subdirectory(core/ANSLibsLoader)

# Modules — feature DLLs (cross-platform)
add_subdirectory(modules/ANSMOT)
add_subdirectory(modules/ANSUtilities)
add_subdirectory(modules/ANSTrainingEngine)
add_subdirectory(modules/ANSLLM)

# Integrations — hardware & protocol DLLs
if(WIN32)
    add_subdirectory(integrations/ANNHUB)
    add_subdirectory(integrations/ANSIO)
    add_subdirectory(integrations/ANSONVIF)
endif()
add_subdirectory(integrations/ANSPulsar)
add_subdirectory(integrations/ANSRabbitMQ)

# Modules — engine layer (CUDA + inference frameworks)
if(ANSCORE_HAS_CUDA)
    add_subdirectory(modules/ANSODEngine)
    add_subdirectory(modules/ANSOCR)
    add_subdirectory(modules/ANSFR)
    add_subdirectory(modules/ANSLPR)
endif()
add_subdirectory(modules/ANSCV)

# Facade
add_subdirectory(ANSLIB)

# Tests
add_subdirectory(tests)