cmake_minimum_required(VERSION 3.20)
project(SecondVoice VERSION 0.1.0 LANGUAGES C CXX)

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

# FetchContent for downloading ImGui from source
include(FetchContent)

# Force static linking for MinGW
if(MINGW)
    set(BUILD_SHARED_LIBS OFF)
    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -static-libgcc -static-libstdc++")
endif()

# Fetch ImGui from GitHub (like WarFactory does!)
FetchContent_Declare(
  imgui
  GIT_REPOSITORY https://github.com/ocornut/imgui.git
  GIT_TAG v1.90.1
)

FetchContent_MakeAvailable(imgui)

# Fetch Ogg and Opus for audio encoding
FetchContent_Declare(
  ogg
  GIT_REPOSITORY https://github.com/xiph/ogg.git
  GIT_TAG v1.3.6
)

FetchContent_Declare(
  opus
  GIT_REPOSITORY https://github.com/xiph/opus.git
  GIT_TAG v1.5.2
)

FetchContent_MakeAvailable(ogg opus)

# Fetch RNNoise for noise reduction (using older stable version)
FetchContent_Declare(
  rnnoise
  GIT_REPOSITORY https://github.com/xiph/rnnoise.git
  GIT_TAG v0.1.1
)

FetchContent_MakeAvailable(rnnoise)

# Build RNNoise as a static library (v0.1.1 structure)
add_library(rnnoise STATIC
    ${rnnoise_SOURCE_DIR}/src/denoise.c
    ${rnnoise_SOURCE_DIR}/src/rnn.c
    ${rnnoise_SOURCE_DIR}/src/rnn_data.c
    ${rnnoise_SOURCE_DIR}/src/pitch.c
    ${rnnoise_SOURCE_DIR}/src/kiss_fft.c
    ${rnnoise_SOURCE_DIR}/src/celt_lpc.c
)

target_include_directories(rnnoise PUBLIC
    ${rnnoise_SOURCE_DIR}/include
    ${rnnoise_SOURCE_DIR}/src
)

# RNNoise needs math library
if(UNIX)
    target_link_libraries(rnnoise PRIVATE m)
endif()

# Create ImGui library with OpenGL/GLFW backends
add_library(imgui_backends
    ${imgui_SOURCE_DIR}/imgui.cpp
    ${imgui_SOURCE_DIR}/imgui_demo.cpp
    ${imgui_SOURCE_DIR}/imgui_draw.cpp
    ${imgui_SOURCE_DIR}/imgui_tables.cpp
    ${imgui_SOURCE_DIR}/imgui_widgets.cpp
    ${imgui_SOURCE_DIR}/backends/imgui_impl_glfw.cpp
    ${CMAKE_CURRENT_SOURCE_DIR}/src/imgui_opengl3_glad.cpp  # Our wrapper with GLAD
)

target_include_directories(imgui_backends PUBLIC
    ${imgui_SOURCE_DIR}
    ${imgui_SOURCE_DIR}/backends
)

# Find packages (no more vcpkg imgui!)
find_package(portaudio CONFIG REQUIRED)
find_package(nlohmann_json CONFIG REQUIRED)
find_package(glfw3 CONFIG REQUIRED)
find_package(glad CONFIG REQUIRED)
find_package(OpenGL REQUIRED)

# Link imgui_backends with glfw and OpenGL
target_link_libraries(imgui_backends PUBLIC glfw OpenGL::GL glad::glad)

# Source files for UI version
set(SOURCES_UI
    src/main.cpp
    # Audio module
    src/audio/AudioCapture.cpp
    src/audio/AudioBuffer.cpp
    src/audio/NoiseReducer.cpp
    # API clients
    src/api/WhisperClient.cpp
    src/api/ClaudeClient.cpp
    src/api/WinHttpClient.cpp
    # UI
    src/ui/TranslationUI.cpp
    # Utils
    src/utils/Config.cpp
    src/utils/SessionLogger.cpp
    # Core
    src/core/Pipeline.cpp
)

# Source files for Console version (NO UI, NO Pipeline)
set(SOURCES_CONSOLE
    src/main_console.cpp
    # Audio module
    src/audio/AudioCapture.cpp
    src/audio/AudioBuffer.cpp
    src/audio/NoiseReducer.cpp
    # API clients
    src/api/WhisperClient.cpp
    src/api/ClaudeClient.cpp
    src/api/WinHttpClient.cpp
    # Utils
    src/utils/Config.cpp
    # Core - WAIT, Pipeline uses UI!
    # src/core/Pipeline.cpp
)

# UI Executable
add_executable(${PROJECT_NAME} ${SOURCES_UI})

# Console Executable (NO UI)
add_executable(${PROJECT_NAME}_Console ${SOURCES_CONSOLE})

# Include directories
target_include_directories(${PROJECT_NAME} PRIVATE
    ${CMAKE_CURRENT_SOURCE_DIR}/src
    ${rnnoise_SOURCE_DIR}/include
)
target_include_directories(${PROJECT_NAME}_Console PRIVATE
    ${CMAKE_CURRENT_SOURCE_DIR}/src
    ${rnnoise_SOURCE_DIR}/include
)

# Link libraries
if(MINGW AND NOT BUILD_SHARED_LIBS)
    # Static linking for MinGW - need to add Windows system libs for portaudio
    target_link_libraries(${PROJECT_NAME} PRIVATE
        ${CMAKE_CURRENT_BINARY_DIR}/vcpkg_installed/x64-mingw-static/lib/libportaudio.a
        nlohmann_json::nlohmann_json
        imgui_backends
        ${CMAKE_CURRENT_BINARY_DIR}/vcpkg_installed/x64-mingw-static/lib/libglfw3.a
        glad::glad
        OpenGL::GL
        opus
        ogg
        rnnoise
        # Windows system libraries
        winmm
        setupapi
        ws2_32
        winhttp
    )
    # Console version - NO UI libs
    target_link_libraries(${PROJECT_NAME}_Console PRIVATE
        ${CMAKE_CURRENT_BINARY_DIR}/vcpkg_installed/x64-mingw-static/lib/libportaudio.a
        nlohmann_json::nlohmann_json
        opus
        ogg
        rnnoise
        # Windows system libraries
        winmm
        setupapi
        ws2_32
        winhttp
    )
else()
    target_link_libraries(${PROJECT_NAME} PRIVATE
        portaudio_static
        nlohmann_json::nlohmann_json
        imgui_backends
        glfw
        glad::glad
        OpenGL::GL
        opus
        ogg
        rnnoise
    )
    # Console version - NO UI libs
    target_link_libraries(${PROJECT_NAME}_Console PRIVATE
        portaudio_static
        nlohmann_json::nlohmann_json
        opus
        ogg
        rnnoise
    )
endif()

# Compiler options
if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
    target_compile_options(${PROJECT_NAME} PRIVATE
        -Wall
        -Wextra
        -Wpedantic
    )
    target_compile_options(${PROJECT_NAME}_Console PRIVATE
        -Wall
        -Wextra
        -Wpedantic
    )

    # MinGW: cpp-httplib's GetAddrInfoExCancel is not available
    # Don't treat warnings as errors for MinGW due to httplib incompatibilities
    if(NOT MINGW)
        target_compile_options(${PROJECT_NAME} PRIVATE -Werror)
        target_compile_options(${PROJECT_NAME}_Console PRIVATE -Werror)
    else()
        # Force console subsystem on Windows (not GUI subsystem)
        target_link_options(${PROJECT_NAME} PRIVATE -mconsole)
        target_link_options(${PROJECT_NAME}_Console PRIVATE -mconsole)

        # FORCE GPU exports using .def file (like games do!)
        target_link_options(${PROJECT_NAME} PRIVATE
            -Wl,--export-all-symbols
            ${CMAKE_CURRENT_SOURCE_DIR}/src/gpu_exports.def
        )
    endif()
endif()

# Copy config files to build directory
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/config.json
               ${CMAKE_CURRENT_BINARY_DIR}/config.json COPYONLY)

# Copy .env file if it exists
if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/.env)
    configure_file(${CMAKE_CURRENT_SOURCE_DIR}/.env
                   ${CMAKE_CURRENT_BINARY_DIR}/.env COPYONLY)
endif()

# Install target
install(TARGETS ${PROJECT_NAME} DESTINATION bin)
install(FILES config.json DESTINATION bin)