# CMakeLists.txt

cmake_minimum_required(VERSION 3.18)

project(YrCrystals VERSION 1.0 LANGUAGES CXX C)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)
set(CMAKE_AUTOUIC ON)

include(FetchContent)

option(BUILD_ANDROID "Build for Android" OFF)
option(BUILD_IOS "Build for iOS" OFF)

find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets Multimedia OpenGLWidgets)

# --- FFTW3 Configuration ---

if(APPLE AND CMAKE_SYSTEM_PROCESSOR STREQUAL "arm64" AND NOT BUILD_IOS)
    message(STATUS "Detected Apple Silicon Desktop. Using Homebrew FFTW3F.")
    find_library(FFTW3_LIB NAMES fftw3f libfftw3f PATHS /opt/homebrew/lib NO_DEFAULT_PATH)
    find_path(FFTW3_INCLUDE_DIR fftw3.h PATHS /opt/homebrew/include NO_DEFAULT_PATH)
    
    if(NOT FFTW3_LIB OR NOT FFTW3_INCLUDE_DIR)
        message(FATAL_ERROR "FFTW3F not found in /opt/homebrew. Please run: brew install fftw")
    endif()

    add_library(fftw3 STATIC IMPORTED)
    set_target_properties(fftw3 PROPERTIES
        IMPORTED_LOCATION "${FFTW3_LIB}"
        INTERFACE_INCLUDE_DIRECTORIES "${FFTW3_INCLUDE_DIR}"
    )

else()
    message(STATUS "Building FFTW3 from source...")

    set(ENABLE_FLOAT ON CACHE BOOL "Build single precision" FORCE)
    set(ENABLE_SSE OFF CACHE BOOL "Disable SSE" FORCE)
    set(ENABLE_SSE2 OFF CACHE BOOL "Disable SSE2" FORCE)
    set(ENABLE_AVX OFF CACHE BOOL "Disable AVX" FORCE)
    set(ENABLE_AVX2 OFF CACHE BOOL "Disable AVX2" FORCE)
    set(ENABLE_THREADS OFF CACHE BOOL "Disable Threads" FORCE)
    set(ENABLE_OPENMP OFF CACHE BOOL "Disable OpenMP" FORCE)
    set(ENABLE_MPI OFF CACHE BOOL "Disable MPI" FORCE)
    set(BUILD_SHARED_LIBS OFF CACHE BOOL "Build Static Libs" FORCE)
    set(BUILD_TESTS OFF CACHE BOOL "Disable Tests" FORCE)
    
    if(ANDROID_ABI STREQUAL "arm64-v8a")
        message(STATUS "Enabling NEON for Android ARM64")
        set(ENABLE_NEON ON CACHE BOOL "Enable NEON" FORCE)
    elseif(BUILD_IOS)
        set(ENABLE_NEON ON CACHE BOOL "Enable NEON" FORCE)
    endif()

    set(PATCH_CMD sed -i.bak "s/cmake_minimum_required.*/cmake_minimum_required(VERSION 3.16)/" <SOURCE_DIR>/CMakeLists.txt)

    FetchContent_Declare(
        fftw3_source
        URL https://www.fftw.org/fftw-3.3.10.tar.gz
        DOWNLOAD_EXTRACT_TIMESTAMP TRUE
        PATCH_COMMAND ${PATCH_CMD}
    )
    
    FetchContent_MakeAvailable(fftw3_source)
endif()

# --- Loop Tempo Estimator ---
# Disable tests and vamp plugin for the library to speed up build and reduce deps
set(BUILD_TESTS OFF CACHE BOOL "Build tests" FORCE)
set(BUILD_VAMP_PLUGIN OFF CACHE BOOL "Build Vamp plugin" FORCE)
add_subdirectory(libraries/loop-tempo-estimator)

# --- Icon Generation ---

set(ICON_SOURCE "${CMAKE_CURRENT_SOURCE_DIR}/assets/icon_source.png")
set(ICON_SCRIPT "${CMAKE_CURRENT_SOURCE_DIR}/scripts/generate_icons.sh")
set(MACOS_ICON "${CMAKE_CURRENT_SOURCE_DIR}/assets/icons/app_icon.icns")
set(WINDOWS_ICON "${CMAKE_CURRENT_SOURCE_DIR}/assets/icons/app_icon.ico")
set(IOS_ASSETS_PATH "${CMAKE_CURRENT_SOURCE_DIR}/ios/Assets.xcassets")
set(IOS_CONTENTS_JSON "${IOS_ASSETS_PATH}/Contents.json")
set(ANDROID_RES_PATH "${CMAKE_CURRENT_SOURCE_DIR}/android/res/mipmap-mdpi/ic_launcher.png")

# Find ImageMagick 'magick' executable
find_program(MAGICK_EXECUTABLE NAMES magick)
if(NOT MAGICK_EXECUTABLE)
    message(WARNING "ImageMagick 'magick' not found. Icons will not be generated.")
endif()

if(EXISTS "${ICON_SOURCE}" AND MAGICK_EXECUTABLE)
    execute_process(COMMAND chmod +x "${ICON_SCRIPT}")

    add_custom_command(
        OUTPUT "${MACOS_ICON}" "${WINDOWS_ICON}" "${IOS_CONTENTS_JSON}" "${ANDROID_RES_PATH}"
        COMMAND "${ICON_SCRIPT}" "${MAGICK_EXECUTABLE}"
        WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
        DEPENDS "${ICON_SOURCE}" "${ICON_SCRIPT}"
        COMMENT "Generating icons from source using ${MAGICK_EXECUTABLE}..."
        VERBATIM
    )
    
    add_custom_target(GenerateIcons DEPENDS "${MACOS_ICON}" "${WINDOWS_ICON}" "${IOS_CONTENTS_JSON}" "${ANDROID_RES_PATH}")
endif()

# --- Sources ---

set(PROJECT_SOURCES
    src/main.cpp
    src/Utils.cpp
    src/Processor.cpp
    src/AudioEngine.cpp
    src/VisualizerWidget.cpp
    src/CommonWidgets.cpp
    src/PlayerControls.cpp
    src/MainWindow.cpp
)

if(EXISTS "${ICON_SOURCE}")
    list(APPEND PROJECT_SOURCES ${MACOS_ICON} ${WINDOWS_ICON})
endif()

set(PROJECT_HEADERS
    src/Utils.h
    src/Processor.h
    src/AudioEngine.h
    src/VisualizerWidget.h
    src/CommonWidgets.h
    src/PlayerControls.h
    src/MainWindow.h
)

qt_add_executable(YrCrystals MANUAL_FINALIZATION ${PROJECT_SOURCES} ${PROJECT_HEADERS})

if(EXISTS "${ICON_SOURCE}" AND MAGICK_EXECUTABLE)
    add_dependencies(YrCrystals GenerateIcons)
endif()

# --- Mobile Definitions ---
if(BUILD_ANDROID OR BUILD_IOS)
    target_compile_definitions(YrCrystals PRIVATE IS_MOBILE)
endif()

# --- Linking ---

if(TARGET fftw3f)
    set(FFTW_TARGET fftw3f)
    target_include_directories(YrCrystals PRIVATE 
        "${fftw3_source_SOURCE_DIR}/api"
        "${fftw3_source_BINARY_DIR}"
    )
else()
    set(FFTW_TARGET fftw3)
endif()

target_link_libraries(YrCrystals PRIVATE
    Qt6::Core Qt6::Gui Qt6::Widgets Qt6::Multimedia Qt6::OpenGLWidgets
    ${FFTW_TARGET}
    loop-tempo-estimator
)

if(BUILD_ANDROID)
    target_link_libraries(YrCrystals PRIVATE log m)
    set_property(TARGET YrCrystals PROPERTY QT_ANDROID_PACKAGE_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/android")
endif()

if(BUILD_IOS)
    if(NOT EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/ios/Info.plist")
        message(FATAL_ERROR "Missing ios/Info.plist. Please create it before building.")
    endif()

    set_source_files_properties(src/Utils.cpp PROPERTIES LANGUAGE OBJCXX)

    set_target_properties(YrCrystals PROPERTIES
        MACOSX_BUNDLE TRUE
        MACOSX_BUNDLE_BUNDLE_NAME "Yr Crystals"
        MACOSX_BUNDLE_GUI_IDENTIFIER "com.yrcrystals.app"
        MACOSX_BUNDLE_INFO_PLIST "${CMAKE_CURRENT_SOURCE_DIR}/ios/Info.plist"
        XCODE_ATTRIBUTE_ASSETCATALOG_COMPILER_APPICON_NAME "AppIcon"
        RESOURCE "${IOS_ASSETS_PATH}"
    )
    
    if(EXISTS "${ICON_SOURCE}")
        message(STATUS "Adding iOS Assets from: ${IOS_ASSETS_PATH}")
        file(MAKE_DIRECTORY "${IOS_ASSETS_PATH}")
        target_sources(YrCrystals PRIVATE "${IOS_ASSETS_PATH}")
    endif()

    qt_import_plugins(YrCrystals
        EXCLUDE 
            Qt6::FFmpegMediaPlugin 
            Qt6::QFFmpegMediaPlugin
    )

    target_link_libraries(YrCrystals PRIVATE
        "-framework AudioToolbox"
        "-framework AVFoundation"
        "-framework CoreMedia"
        "-framework VideoToolbox"
        "-framework CoreVideo"
        "-framework CoreFoundation"
        "-framework UIKit"
        "-framework UniformTypeIdentifiers"
        "-lz"
        "-lbz2"
        "-liconv"
    )
endif()

if(APPLE AND NOT BUILD_IOS)
    set_target_properties(YrCrystals PROPERTIES
        MACOSX_BUNDLE TRUE
        MACOSX_BUNDLE_BUNDLE_NAME "Yr Crystals"
        MACOSX_BUNDLE_GUI_IDENTIFIER "com.yrcrystals.app"
        MACOSX_BUNDLE_ICON_FILE "app_icon.icns"
        RESOURCE "${MACOS_ICON}"
    )
elseif(WIN32)
    set_target_properties(YrCrystals PROPERTIES
        WIN32_EXECUTABLE TRUE
    )
endif()

qt_finalize_executable(YrCrystals)