# SPDX-FileCopyrightText: 2018 yuzu Emulator Project & 2024 suyu Emulator Project
# SPDX-License-Identifier: GPL-2.0-or-later

cmake_minimum_required(VERSION 3.22)

set(CMAKE_XCODE_GENERATE_TOP_LEVEL_PROJECT OFF)
set(CMAKE_XCODE_EMIT_RELATIVE_PATH YES)

project(suyu)

list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/CMakeModules")
list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/externals/cmake-modules")

include(DownloadExternals)
include(CMakeDependentOption)
include(CTest)

# Set bundled sdl2/qt as dependent options.
# OFF by default, but if ENABLE_SDL2 and MSVC are true then ON
option(ENABLE_SDL2 "Enable the SDL2 frontend" ON)
CMAKE_DEPENDENT_OPTION(SUYU_USE_BUNDLED_SDL2 "Download bundled SDL2 binaries" ON "ENABLE_SDL2;MSVC" OFF)
# On Linux system SDL2 is likely to be lacking HIDAPI support which have drawbacks but is needed for SDL motion
CMAKE_DEPENDENT_OPTION(SUYU_USE_EXTERNAL_SDL2 "Compile external SDL2" ON "ENABLE_SDL2;NOT MSVC" OFF)

cmake_dependent_option(ENABLE_LIBUSB "Enable the use of LibUSB" ON "NOT ANDROID" OFF)

option(ENABLE_OPENGL "Enable OpenGL" ON)
mark_as_advanced(FORCE ENABLE_OPENGL)
option(ENABLE_QT "Enable the Qt frontend" ON)
option(ENABLE_QT6 "Allow usage of Qt6 to be attempted" OFF)
set(QT6_LOCATION "" CACHE PATH "Additional Location to search for Qt6 libraries like C:/Qt/6.3.1/msvc2019_64/")

option(ENABLE_QT_TRANSLATION "Enable translations for the Qt frontend" OFF)
CMAKE_DEPENDENT_OPTION(SUYU_USE_BUNDLED_QT "Download bundled Qt binaries" "${MSVC}" "ENABLE_QT" OFF)

option(ENABLE_WEB_SERVICE "Enable web services (telemetry, etc.)" ON)

option(SUYU_USE_BUNDLED_FFMPEG "Download/Build bundled FFmpeg" "${WIN32}")

option(SUYU_USE_EXTERNAL_VULKAN_HEADERS "Use Vulkan-Headers from externals" ON)

option(SUYU_USE_EXTERNAL_VULKAN_UTILITY_LIBRARIES "Use Vulkan-Utility-Libraries from externals" ON)

option(SUYU_USE_QT_MULTIMEDIA "Use QtMultimedia for Camera" OFF)

option(SUYU_USE_QT_WEB_ENGINE "Use QtWebEngine for web applet implementation" OFF)

option(ENABLE_CUBEB "Enables the cubeb audio backend" ON)

option(USE_DISCORD_PRESENCE "Enables Discord Rich Presence" OFF)

option(SUYU_TESTS "Compile tests" "${BUILD_TESTING}")

option(SUYU_USE_PRECOMPILED_HEADERS "Use precompiled headers" ON)

option(SUYU_DOWNLOAD_ANDROID_VVL "Download validation layer binary for android" ON)

CMAKE_DEPENDENT_OPTION(SUYU_ROOM "Compile LDN room server" ON "NOT ANDROID" OFF)

CMAKE_DEPENDENT_OPTION(SUYU_CRASH_DUMPS "Compile crash dump (Minidump) support" OFF "WIN32 OR LINUX" OFF)

option(SUYU_USE_BUNDLED_VCPKG "Use vcpkg for suyu dependencies" "${MSVC}")

option(SUYU_CHECK_SUBMODULES "Check if submodules are present" ON)

option(SUYU_ENABLE_LTO "Enable link-time optimization" OFF)

option(SUYU_DOWNLOAD_TIME_ZONE_DATA "Always download time zone binaries" OFF)

option(SUYU_ENABLE_PORTABLE "Allow suyu to enable portable mode if a user folder is found in the CWD" ON)

CMAKE_DEPENDENT_OPTION(SUYU_USE_FASTER_LD "Check if a faster linker is available" ON "NOT WIN32" OFF)

CMAKE_DEPENDENT_OPTION(USE_SYSTEM_MOLTENVK "Use the system MoltenVK lib (instead of the bundled one)" OFF "APPLE" ON)

option(USE_CCACHE "Use CCache for faster building" ON)

set(DEFAULT_ENABLE_OPENSSL ON)
if (ANDROID OR WIN32 OR APPLE)
    # - Windows defaults to the Schannel backend.
    # - macOS defaults to the SecureTransport backend.
    # - Android currently has no SSL backend as the NDK doesn't include any SSL
    #   library; a proper 'native' backend would have to go through Java.
    # But you can force builds for those platforms to use OpenSSL if you have
    # your own copy of it.
    set(DEFAULT_ENABLE_OPENSSL OFF)
endif()
option(ENABLE_OPENSSL "Enable OpenSSL backend for ISslConnection" ${DEFAULT_ENABLE_OPENSSL})

if (ANDROID AND SUYU_DOWNLOAD_ANDROID_VVL)
    set(vvl_version "sdk-1.3.261.1")
    set(vvl_zip_file "${CMAKE_BINARY_DIR}/externals/vvl-android.zip")
    if (NOT EXISTS "${vvl_zip_file}")
        # Download and extract validation layer release to externals directory
        set(vvl_base_url "https://github.com/KhronosGroup/Vulkan-ValidationLayers/releases/download")
        file(DOWNLOAD "${vvl_base_url}/${vvl_version}/android-binaries-${vvl_version}-android.zip"
            "${vvl_zip_file}" SHOW_PROGRESS)
        execute_process(COMMAND ${CMAKE_COMMAND} -E tar xf "${vvl_zip_file}"
                        WORKING_DIRECTORY "${CMAKE_BINARY_DIR}/externals")
    endif()

    # Copy the arm64 binary to src/android/app/main/jniLibs
    set(vvl_lib_path "${CMAKE_CURRENT_SOURCE_DIR}/src/android/app/src/main/jniLibs/arm64-v8a/")
    file(COPY "${CMAKE_BINARY_DIR}/externals/android-binaries-${vvl_version}/arm64-v8a/libVkLayer_khronos_validation.so"
            DESTINATION "${vvl_lib_path}")
endif()

if (ANDROID)
    set(CMAKE_SKIP_INSTALL_RULES ON)
endif()

if (SUYU_USE_BUNDLED_VCPKG)
    if (ANDROID)
        set(ENV{ANDROID_NDK_HOME} "${ANDROID_NDK}")
        list(APPEND VCPKG_MANIFEST_FEATURES "android")

        if (CMAKE_ANDROID_ARCH_ABI STREQUAL "arm64-v8a")
            set(VCPKG_TARGET_TRIPLET "arm64-android")
            # this is to avoid CMake using the host pkg-config to find the host
            # libraries when building for Android targets
            set(PKG_CONFIG_EXECUTABLE "aarch64-none-linux-android-pkg-config" CACHE FILEPATH "" FORCE)
        elseif (CMAKE_ANDROID_ARCH_ABI STREQUAL "x86_64")
            set(VCPKG_TARGET_TRIPLET "x64-android")
            set(PKG_CONFIG_EXECUTABLE "x86_64-none-linux-android-pkg-config" CACHE FILEPATH "" FORCE)
        else()
            message(FATAL_ERROR "Unsupported Android architecture ${CMAKE_ANDROID_ARCH_ABI}")
        endif()
    endif()

    if (MSVC)
        set(VCPKG_DOWNLOADS_PATH ${PROJECT_SOURCE_DIR}/externals/vcpkg/downloads)
        set(NASM_VERSION "2.16.01")
        set(NASM_DESTINATION_PATH ${VCPKG_DOWNLOADS_PATH}/nasm-${NASM_VERSION}-win64.zip)
        set(NASM_DOWNLOAD_URL "https://gitlab.com/suyu-emu/ext-windows-bin/raw/master/nasm/nasm-${NASM_VERSION}-win64.zip")

        if (NOT EXISTS ${NASM_DESTINATION_PATH})
            file(DOWNLOAD ${NASM_DOWNLOAD_URL} ${NASM_DESTINATION_PATH} SHOW_PROGRESS STATUS NASM_STATUS)

            if (NOT NASM_STATUS EQUAL 0)
                # Warn and not fail since vcpkg is supposed to download this package for us in the first place
                message(WARNING "External nasm vcpkg package download from ${NASM_DOWNLOAD_URL} failed with status ${NASM_STATUS}")
            endif()
        endif()
    endif()

    if (SUYU_TESTS)
        list(APPEND VCPKG_MANIFEST_FEATURES "suyu-tests")
    endif()
    if (ENABLE_WEB_SERVICE)
        list(APPEND VCPKG_MANIFEST_FEATURES "web-service")
    endif()
    if (ANDROID)
        list(APPEND VCPKG_MANIFEST_FEATURES "android")
    endif()

    include(${CMAKE_SOURCE_DIR}/externals/vcpkg/scripts/buildsystems/vcpkg.cmake)
elseif(NOT "$ENV{VCPKG_TOOLCHAIN_FILE}" STREQUAL "")
    # Disable manifest mode (use vcpkg classic mode) when using a custom vcpkg installation
    option(VCPKG_MANIFEST_MODE "")
    include("$ENV{VCPKG_TOOLCHAIN_FILE}")
endif()

if (SUYU_USE_PRECOMPILED_HEADERS)
    if (MSVC AND CCACHE)
        # buildcache does not properly cache PCH files, leading to compilation errors.
        # See https://github.com/mbitsnbites/buildcache/discussions/230
        message(WARNING "buildcache does not properly support Precompiled Headers. Disabling PCH")
        set(DYNARMIC_USE_PRECOMPILED_HEADERS OFF CACHE BOOL "" FORCE)
        set(SUYU_USE_PRECOMPILED_HEADERS OFF CACHE BOOL "" FORCE)
    endif()
endif()
if (SUYU_USE_PRECOMPILED_HEADERS)
    message(STATUS "Using Precompiled Headers.")
    set(CMAKE_PCH_INSTANTIATE_TEMPLATES ON)
endif()


# Default to a Release build
get_property(IS_MULTI_CONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
if (NOT IS_MULTI_CONFIG AND NOT CMAKE_BUILD_TYPE)
    set(CMAKE_BUILD_TYPE "Release" CACHE STRING "Choose the type of build, options are: Debug Release RelWithDebInfo MinSizeRel." FORCE)
    message(STATUS "Defaulting to a Release build")
endif()

if(EXISTS ${PROJECT_SOURCE_DIR}/hooks/pre-commit AND NOT EXISTS ${PROJECT_SOURCE_DIR}/.git/hooks/pre-commit)
    if (EXISTS ${PROJECT_SOURCE_DIR}/.git/)
        message(STATUS "Copying pre-commit hook")
        file(COPY hooks/pre-commit DESTINATION ${PROJECT_SOURCE_DIR}/.git/hooks)
    endif()
endif()

# Sanity check : Check that all submodules are present
# =======================================================================

function(check_submodules_present)
    file(READ "${PROJECT_SOURCE_DIR}/.gitmodules" gitmodules)
    string(REGEX MATCHALL "path *= *[^ \t\r\n]*" gitmodules ${gitmodules})
    foreach(module ${gitmodules})
        string(REGEX REPLACE "path *= *" "" module ${module})
        if (NOT EXISTS "${PROJECT_SOURCE_DIR}/${module}/.git")
            message(FATAL_ERROR "Git submodule ${module} not found. "
                    "Please run: \ngit submodule update --init --recursive")
        endif()
    endforeach()
endfunction()

if(EXISTS ${PROJECT_SOURCE_DIR}/.gitmodules AND SUYU_CHECK_SUBMODULES)
    check_submodules_present()
endif()
configure_file(${PROJECT_SOURCE_DIR}/dist/compatibility_list/compatibility_list.qrc
               ${PROJECT_BINARY_DIR}/dist/compatibility_list/compatibility_list.qrc
               COPYONLY)
if (EXISTS ${PROJECT_SOURCE_DIR}/dist/compatibility_list/compatibility_list.json)
    configure_file("${PROJECT_SOURCE_DIR}/dist/compatibility_list/compatibility_list.json"
                   "${PROJECT_BINARY_DIR}/dist/compatibility_list/compatibility_list.json"
                   COPYONLY)
endif()
if (ENABLE_COMPATIBILITY_LIST_DOWNLOAD AND NOT EXISTS ${PROJECT_BINARY_DIR}/dist/compatibility_list/compatibility_list.json)
    message(STATUS "Downloading compatibility list for suyu...")
    file(DOWNLOAD
        https://api.suyu.dev/gamedb/
        "${PROJECT_BINARY_DIR}/dist/compatibility_list/compatibility_list.json" SHOW_PROGRESS)
endif()
if (NOT EXISTS ${PROJECT_BINARY_DIR}/dist/compatibility_list/compatibility_list.json)
    file(WRITE ${PROJECT_BINARY_DIR}/dist/compatibility_list/compatibility_list.json "")
endif()

# Detect current compilation architecture and create standard definitions
# =======================================================================

include(CheckSymbolExists)
function(detect_architecture symbol arch)
    if (NOT DEFINED ARCHITECTURE)
        set(CMAKE_REQUIRED_QUIET 1)
        check_symbol_exists("${symbol}" "" ARCHITECTURE_${arch})
        unset(CMAKE_REQUIRED_QUIET)

        # The output variable needs to be unique across invocations otherwise
        # CMake's crazy scope rules will keep it defined
        if (ARCHITECTURE_${arch})
            set(ARCHITECTURE "${arch}" PARENT_SCOPE)
            set(ARCHITECTURE_${arch} 1 PARENT_SCOPE)
            add_definitions(-DARCHITECTURE_${arch}=1)
        endif()
    endif()
endfunction()

if (NOT ENABLE_GENERIC)
    if (MSVC)
        detect_architecture("_M_AMD64" x86_64)
        detect_architecture("_M_IX86" x86)
        detect_architecture("_M_ARM" arm)
        detect_architecture("_M_ARM64" arm64)
    else()
        detect_architecture("__x86_64__" x86_64)
        detect_architecture("__i386__" x86)
        detect_architecture("__arm__" arm)
        detect_architecture("__aarch64__" arm64)
    endif()
endif()

if (NOT DEFINED ARCHITECTURE)
    set(ARCHITECTURE "GENERIC")
    set(ARCHITECTURE_GENERIC 1)
    add_definitions(-DARCHITECTURE_GENERIC=1)
endif()
message(STATUS "Target architecture: ${ARCHITECTURE}")

if (UNIX)
    add_definitions(-DSUYU_UNIX=1)
endif()

if (ARCHITECTURE_arm64 AND (ANDROID OR ${CMAKE_SYSTEM_NAME} STREQUAL "Linux"))
    set(HAS_NCE 1)
    add_definitions(-DHAS_NCE=1)
endif()

# Configure C++ standard
# ===========================

# boost asio's concept usage doesn't play nicely with some compilers yet.
add_definitions(-DBOOST_ASIO_DISABLE_CONCEPTS)
if (MSVC)
    add_compile_options($<$<COMPILE_LANGUAGE:CXX>:/std:c++20>)

    # boost still makes use of deprecated result_of.
    add_definitions(-D_HAS_DEPRECATED_RESULT_OF)
else()
    set(CMAKE_CXX_STANDARD 20)
    set(CMAKE_CXX_STANDARD_REQUIRED ON)
endif()

# Output binaries to bin/
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/bin)

# System imported libraries
# =======================================================================

# Enforce the search mode of non-required packages for better and shorter failure messages
find_package(Boost 1.79.0 REQUIRED context)
find_package(enet 1.3 MODULE)
find_package(fmt 9 REQUIRED)
find_package(LLVM 17.0.2 MODULE COMPONENTS Demangle)
find_package(lz4 REQUIRED)
find_package(nlohmann_json 3.8 REQUIRED)
find_package(Opus 1.3 MODULE)
find_package(RenderDoc MODULE)
find_package(SimpleIni MODULE)
find_package(stb MODULE)
find_package(VulkanMemoryAllocator CONFIG)
find_package(ZLIB 1.2 REQUIRED)
find_package(zstd 1.5 REQUIRED)

if (NOT SUYU_USE_EXTERNAL_VULKAN_HEADERS)
    find_package(VulkanHeaders 1.3.274 REQUIRED)
endif()

if (NOT SUYU_USE_EXTERNAL_VULKAN_UTILITY_LIBRARIES)
    find_package(VulkanUtilityLibraries REQUIRED)
endif()

if (ENABLE_LIBUSB)
    find_package(libusb 1.0.24 MODULE)
endif()

if (ARCHITECTURE_x86 OR ARCHITECTURE_x86_64)
    find_package(xbyak 7 CONFIG)
endif()

if (ARCHITECTURE_arm64)
    find_package(oaknut 2.0.1 CONFIG)
endif()

if (ARCHITECTURE_x86_64 OR ARCHITECTURE_arm64)
    find_package(dynarmic 6.4.0 CONFIG)
endif()

if (ENABLE_CUBEB)
    find_package(cubeb CONFIG)
endif()

if (USE_DISCORD_PRESENCE)
    find_package(DiscordRPC MODULE)
endif()

if (ENABLE_WEB_SERVICE)
    find_package(cpp-jwt 1.4 CONFIG)
endif()

if (ENABLE_WEB_SERVICE OR USE_DISCORD_PRESENCE)
    find_package(httplib 0.12 MODULE COMPONENTS OpenSSL)
endif()

if (SUYU_TESTS)
    find_package(Catch2 3.0.1 REQUIRED)
endif()

# boost:asio has functions that require AcceptEx et al
if (MINGW)
    find_library(MSWSOCK_LIBRARY mswsock REQUIRED)
endif()

if(ENABLE_OPENSSL)
    find_package(OpenSSL 1.1.1 REQUIRED)
endif()

if (UNIX AND NOT APPLE)
    find_package(gamemode 1.7 MODULE)
endif()

# Please consider this as a stub
if(ENABLE_QT6 AND Qt6_LOCATION)
    list(APPEND CMAKE_PREFIX_PATH "${Qt6_LOCATION}")
endif()

function(set_suyu_qt_components)
    # Best practice is to ask for all components at once, so they are from the same version
    set(SUYU_QT_COMPONENTS2 Core Widgets Concurrent)
    if (${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
        list(APPEND SUYU_QT_COMPONENTS2 DBus)
    endif()
    if (SUYU_USE_QT_MULTIMEDIA)
        list(APPEND SUYU_QT_COMPONENTS2 Multimedia)
    endif()
    if (SUYU_USE_QT_WEB_ENGINE)
        list(APPEND SUYU_QT_COMPONENTS2 WebEngineCore WebEngineWidgets)
    endif()
    if (ENABLE_QT_TRANSLATION)
        list(APPEND SUYU_QT_COMPONENTS2 LinguistTools)
    endif()
    if (USE_DISCORD_PRESENCE)
        list(APPEND SUYU_QT_COMPONENTS2 Network)
    endif()
    set(SUYU_QT_COMPONENTS ${SUYU_QT_COMPONENTS2} PARENT_SCOPE)
endfunction(set_suyu_qt_components)

# Qt5 requires that we find components, so it doesn't fit our pretty little find package function
if(ENABLE_QT)
    set(QT_VERSION 5.15)
    # These are used to specify minimum versions
    set(QT5_VERSION 5.15)
    set(QT6_VERSION 6.3.1)

    set_suyu_qt_components()
    if (ENABLE_QT6)
        find_package(Qt6 ${QT6_VERSION} COMPONENTS ${SUYU_QT_COMPONENTS})
    endif()
    if (Qt6_FOUND)
        message(STATUS "suyu/CMakeLists.txt: Qt6Widgets_VERSION ${Qt6Widgets_VERSION}, setting QT_VERSION")
        set(QT_VERSION ${Qt6Widgets_VERSION})
        set(QT_MAJOR_VERSION 6)
        # Qt6 sets cxx_std_17 and we need to undo that
        set_target_properties(Qt6::Platform PROPERTIES INTERFACE_COMPILE_FEATURES "")
    else()
        message(STATUS "suyu/CMakeLists.txt: Qt6 not found/not selected, trying for Qt5")
        # When Qt6 partially found, need this set to use Qt5 when not specifying version
        set(QT_DEFAULT_MAJOR_VERSION 5)
        set(QT_MAJOR_VERSION 5)

        set(SUYU_USE_QT_MULTIMEDIA ON)
        # Check for system Qt on Linux, fallback to bundled Qt
        if (UNIX AND NOT APPLE)
            if (NOT SUYU_USE_BUNDLED_QT)
                find_package(Qt5 ${QT5_VERSION} COMPONENTS Widgets DBus Multimedia)
            endif()
            if (${CMAKE_SYSTEM_NAME} STREQUAL "Linux" AND (NOT Qt5_FOUND OR SUYU_USE_BUNDLED_QT))
                # Check for dependencies, then enable bundled Qt download

                # Check that the system GLIBCXX version is compatible
                find_program(OBJDUMP objdump)
                if (NOT OBJDUMP)
                    message(FATAL_ERROR "Required program `objdump` not found.")
                endif()
                find_library(LIBSTDCXX libstdc++.so.6)
                execute_process(
                    COMMAND
                        ${OBJDUMP} -T ${LIBSTDCXX}
                    COMMAND
                        grep GLIBCXX_3.4.28
                    COMMAND
                        sed "s/[0-9a-f]*.*  //"
                    COMMAND
                        sed "s/ .*//"
                    COMMAND
                        sort -u
                    OUTPUT_VARIABLE
                        GLIBCXX_MET
                )
                if (NOT GLIBCXX_MET)
                    message(FATAL_ERROR "Qt too old or not found, and bundled Qt package is not \
                        compatible with this system. Either install Qt ${QT_VERSION}, or provide the path \
                        to Qt by setting the variable Qt5_ROOT.")
                endif()

                # Check for headers
                find_package(PkgConfig REQUIRED)
                pkg_check_modules(QT_DEP_GLU QUIET glu>=9.0.0)
                if (NOT QT_DEP_GLU_FOUND)
                    message(FATAL_ERROR "Qt bundled package dependency `glu` not found. \
                        Perhaps `libglu1-mesa-dev` needs to be installed?")
                endif()
                pkg_check_modules(QT_DEP_MESA QUIET dri>=20.0.8)
                if (NOT QT_DEP_MESA_FOUND)
                    message(FATAL_ERROR "Qt bundled package dependency `dri` not found. \
                        Perhaps `mesa-common-dev` needs to be installed?")
                endif()

                # Check for X libraries
                set(BUNDLED_QT_REQUIREMENTS
                    libxcb-icccm.so.4
                    libxcb-image.so.0
                    libxcb-keysyms.so.1
                    libxcb-randr.so.0
                    libxcb-render-util.so.0
                    libxcb-render.so.0
                    libxcb-shape.so.0
                    libxcb-shm.so.0
                    libxcb-sync.so.1
                    libxcb-xfixes.so.0
                    libxcb-xinerama.so.0
                    libxcb-xkb.so.1
                    libxcb.so.1
                    libxkbcommon-x11.so.0
                    libxkbcommon.so.0
                )
                set(UNRESOLVED_QT_DEPS "")
                foreach (REQUIREMENT ${BUNDLED_QT_REQUIREMENTS})
                    find_library(BUNDLED_QT_${REQUIREMENT} ${REQUIREMENT})
                    if (NOT BUNDLED_QT_${REQUIREMENT})
                        set(UNRESOLVED_QT_DEPS ${UNRESOLVED_QT_DEPS} ${REQUIREMENT})
                    endif()
                    unset(BUNDLED_QT_${REQUIREMENT})
                endforeach()
                unset(BUNDLED_QT_REQUIREMENTS)

                if (NOT "${UNRESOLVED_QT_DEPS}" STREQUAL "")
                    message(FATAL_ERROR "Bundled Qt package missing required dependencies: ${UNRESOLVED_QT_DEPS}")
                endif()

                set(SUYU_USE_BUNDLED_QT ON CACHE BOOL "Download bundled Qt" FORCE)
            endif()
            if (SUYU_USE_BUNDLED_QT)
                # Binary package currently does not support Qt webengine, so make sure it's disabled
                set(SUYU_USE_QT_WEB_ENGINE OFF CACHE BOOL "Use Qt Webengine" FORCE)
            endif()
        endif()

        set(SUYU_QT_NO_CMAKE_SYSTEM_PATH)

        if(SUYU_USE_BUNDLED_QT)
            if ((MSVC_VERSION GREATER_EQUAL 1920 AND MSVC_VERSION LESS 1940) AND ARCHITECTURE_x86_64)
                set(QT_BUILD qt-5.15.2-msvc2019_64)
            elseif ((${CMAKE_SYSTEM_NAME} STREQUAL "Linux") AND NOT MINGW AND ARCHITECTURE_x86_64)
                set(QT_BUILD qt5_5_15_2)
            else()
                message(FATAL_ERROR "No bundled Qt binaries for your toolchain. Disable SUYU_USE_BUNDLED_QT and provide your own.")
            endif()

            if (DEFINED QT_BUILD)
                download_bundled_external("qt/" ${QT_BUILD} QT_PREFIX)
            endif()

            set(QT_PREFIX_HINT HINTS "${QT_PREFIX}")

            set(SUYU_QT_NO_CMAKE_SYSTEM_PATH "NO_CMAKE_SYSTEM_PATH")
            # Binary package for Qt5 has Qt Multimedia
            set(SUYU_USE_QT_MULTIMEDIA ON CACHE BOOL "Use Qt Multimedia" FORCE)
        endif()

        set_suyu_qt_components()
        find_package(Qt5 ${QT5_VERSION} COMPONENTS ${SUYU_QT_COMPONENTS} ${QT_PREFIX_HINT} ${SUYU_QT_NO_CMAKE_SYSTEM_PATH})
    endif()

endif()

# find SDL2 exports a bunch of variables that are needed, so its easier to do this outside of the suyu_find_package
if (ENABLE_SDL2)
    if (SUYU_USE_BUNDLED_SDL2)
        # Detect toolchain and platform
        if ((MSVC_VERSION GREATER_EQUAL 1920 AND MSVC_VERSION LESS 1940) AND ARCHITECTURE_x86_64)
            set(SDL2_VER "SDL2-2.28.2")
        else()
            message(FATAL_ERROR "No bundled SDL2 binaries for your toolchain. Disable SUYU_USE_BUNDLED_SDL2 and provide your own.")
        endif()

        if (DEFINED SDL2_VER)
            download_bundled_external("sdl2/" ${SDL2_VER} SDL2_PREFIX)
        endif()

        set(SDL2_FOUND YES)
        set(SDL2_INCLUDE_DIR "${SDL2_PREFIX}/include" CACHE PATH "Path to SDL2 headers")
        set(SDL2_LIBRARY "${SDL2_PREFIX}/lib/x64/SDL2.lib" CACHE PATH "Path to SDL2 library")
        set(SDL2_DLL_DIR "${SDL2_PREFIX}/lib/x64/" CACHE PATH "Path to SDL2.dll")

        add_library(SDL2::SDL2 INTERFACE IMPORTED)
        target_link_libraries(SDL2::SDL2 INTERFACE "${SDL2_LIBRARY}")
        target_include_directories(SDL2::SDL2 INTERFACE "${SDL2_INCLUDE_DIR}")
    elseif (SUYU_USE_EXTERNAL_SDL2)
        message(STATUS "Using SDL2 from externals.")
    else()
        find_package(SDL2 2.26.4 REQUIRED)
    endif()
endif()

# List of all FFmpeg components required
set(FFmpeg_COMPONENTS
    avcodec
    avfilter
    avutil
    swscale)

if (UNIX AND NOT APPLE AND NOT ANDROID)
    find_package(PkgConfig REQUIRED)
    pkg_check_modules(LIBVA libva)
endif()
if (NOT SUYU_USE_BUNDLED_FFMPEG)
    # Use system installed FFmpeg
    find_package(FFmpeg 4.3 REQUIRED QUIET COMPONENTS ${FFmpeg_COMPONENTS})
endif()

if (WIN32 AND SUYU_CRASH_DUMPS)
    set(BREAKPAD_VER "breakpad-c89f9dd")
    download_bundled_external("breakpad/" ${BREAKPAD_VER} BREAKPAD_PREFIX)

    set(BREAKPAD_CLIENT_INCLUDE_DIR "${BREAKPAD_PREFIX}/include")
    set(BREAKPAD_CLIENT_LIBRARY "${BREAKPAD_PREFIX}/lib/libbreakpad_client.lib")

    add_library(libbreakpad_client INTERFACE IMPORTED)
    target_link_libraries(libbreakpad_client INTERFACE "${BREAKPAD_CLIENT_LIBRARY}")
    target_include_directories(libbreakpad_client INTERFACE "${BREAKPAD_CLIENT_INCLUDE_DIR}")
endif()

# Prefer the -pthread flag on Linux.
set(THREADS_PREFER_PTHREAD_FLAG ON)
find_package(Threads REQUIRED)

# Platform-specific library requirements
# ======================================

if (APPLE)
    # Umbrella framework for everything GUI-related
    find_library(COCOA_LIBRARY Cocoa)
    set(PLATFORM_LIBRARIES ${COCOA_LIBRARY} ${IOKIT_LIBRARY} ${COREVIDEO_LIBRARY})
elseif (WIN32)
    # Target Windows 10
    add_definitions(-D_WIN32_WINNT=0x0A00 -DWINVER=0x0A00)
    set(PLATFORM_LIBRARIES winmm ws2_32 iphlpapi)
    if (MINGW)
        # PSAPI is the Process Status API
        set(PLATFORM_LIBRARIES ${PLATFORM_LIBRARIES} psapi imm32 version)
    endif()
elseif (CMAKE_SYSTEM_NAME MATCHES "^(Linux|kFreeBSD|GNU|SunOS)$")
    set(PLATFORM_LIBRARIES rt)
endif()

# Setup a custom clang-format target (if clang-format can be found) that will run
# against all the src files. This should be used before making a pull request.
# =======================================================================

set(CLANG_FORMAT_POSTFIX "-15")
find_program(CLANG_FORMAT
    NAMES clang-format${CLANG_FORMAT_POSTFIX}
          clang-format
    PATHS ${PROJECT_BINARY_DIR}/externals)
# if find_program doesn't find it, try to download from externals
if (NOT CLANG_FORMAT)
    if (WIN32 AND NOT CMAKE_CROSSCOMPILING)
        message(STATUS "Clang format not found! Downloading...")
        set(CLANG_FORMAT "${PROJECT_BINARY_DIR}/externals/clang-format${CLANG_FORMAT_POSTFIX}.exe")
        file(DOWNLOAD
            https://gitlab.com/suyu-emu/ext-windows-bin/raw/master/clang-format${CLANG_FORMAT_POSTFIX}.exe
            "${CLANG_FORMAT}" SHOW_PROGRESS
            STATUS DOWNLOAD_SUCCESS)
        if (NOT DOWNLOAD_SUCCESS EQUAL 0)
            message(WARNING "Could not download clang format! Disabling the clang format target")
            file(REMOVE ${CLANG_FORMAT})
            unset(CLANG_FORMAT)
        endif()
    else()
        message(WARNING "Clang format not found! Disabling the clang format target")
    endif()
endif()

if (CLANG_FORMAT)
    set(SRCS ${PROJECT_SOURCE_DIR}/src)
    set(CCOMMENT "Running clang format against all the .h and .cpp files in src/")
    if (WIN32)
        add_custom_target(clang-format
            COMMAND powershell.exe -Command "Get-ChildItem '${SRCS}/*' -Include *.cpp,*.h -Recurse | Foreach {&'${CLANG_FORMAT}' -i $_.fullname}"
            COMMENT ${CCOMMENT})
    elseif(MINGW)
        add_custom_target(clang-format
            COMMAND find `cygpath -u ${SRCS}` -iname *.h -o -iname *.cpp | xargs `cygpath -u ${CLANG_FORMAT}` -i
            COMMENT ${CCOMMENT})
    else()
        add_custom_target(clang-format
            COMMAND find ${SRCS} -iname *.h -o -iname *.cpp | xargs ${CLANG_FORMAT} -i
            COMMENT ${CCOMMENT})
    endif()
    unset(SRCS)
    unset(CCOMMENT)
endif()

# Include source code
# ===================

# This function should be passed a list of all files in a target. It will automatically generate
# file groups following the directory hierarchy, so that the layout of the files in IDEs matches the
# one in the filesystem.
function(create_target_directory_groups target_name)
    # Place any files that aren't in the source list in a separate group so that they don't get in
    # the way.
    source_group("Other Files" REGULAR_EXPRESSION ".")

    get_target_property(target_sources "${target_name}" SOURCES)

    foreach(file_name IN LISTS target_sources)
        get_filename_component(dir_name "${file_name}" PATH)
        # Group names use '\' as a separator even though the entire rest of CMake uses '/'...
        string(REPLACE "/" "\\" group_name "${dir_name}")
        source_group("${group_name}" FILES "${file_name}")
    endforeach()
endfunction()

# Prevent boost from linking against libs when building
target_link_libraries(Boost::headers INTERFACE Boost::disable_autolinking)
# Adjustments for MSVC + Ninja
if (MSVC AND CMAKE_GENERATOR STREQUAL "Ninja")
    add_compile_options(
        /wd4464 # relative include path contains '..'
        /wd4711 # function 'function' selected for automatic inline expansion
        /wd4820 # 'bytes' bytes padding added after construct 'member_name'
    )
endif()

if (SUYU_USE_FASTER_LD AND CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
    # We will assume that if the compiler is GCC, it will attempt to use ld.bfd by default.
    # Try to pick a faster linker.
    find_program(LLD lld)
    find_program(MOLD mold)

    if (MOLD AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "12.1")
        message(NOTICE "Selecting mold as linker")
        add_link_options("-fuse-ld=mold")
    elseif (LLD)
        message(NOTICE "Selecting lld as linker")
        add_link_options("-fuse-ld=lld")
    endif()
endif()

add_subdirectory(externals)
add_subdirectory(src)

# Set suyu project or suyu-cmd project as default StartUp Project in Visual Studio depending on whether QT is enabled or not
if(ENABLE_QT)
    set_property(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} PROPERTY VS_STARTUP_PROJECT suyu)
else()
    set_property(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} PROPERTY VS_STARTUP_PROJECT suyu-cmd)
endif()


# Installation instructions
# =========================

# Install freedesktop.org metadata files, following those specifications:
# https://specifications.freedesktop.org/desktop-entry-spec/desktop-entry-spec-latest.html
# https://specifications.freedesktop.org/icon-theme-spec/icon-theme-spec-latest.html
# https://specifications.freedesktop.org/shared-mime-info-spec/shared-mime-info-spec-latest.html
# https://www.freedesktop.org/software/appstream/docs/
if(ENABLE_QT AND UNIX AND NOT APPLE)
    install(FILES "dist/org.suyu_emu.suyu.desktop"
            DESTINATION "share/applications")
    install(FILES "dist/suyu.svg"
            DESTINATION "share/icons/hicolor/scalable/apps"
            RENAME "org.suyu_emu.suyu.svg")
    install(FILES "dist/org.suyu_emu.suyu.xml"
            DESTINATION "share/mime/packages")
    install(FILES "dist/org.suyu_emu.suyu.metainfo.xml"
            DESTINATION "share/metainfo")
endif()

# Enable CCACHE. Linux only for now.
if (USE_CCACHE)
  find_program(CCACHE_PROGRAM ccache)
  if(CCACHE_PROGRAM)
    set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${CCACHE_PROGRAM}")
    if (SUYU_USE_PRECOMPILED_HEADERS)
      message(NOTICE "To make use of CCache, set SUYU_USE_PRECOMPILED_HEADERS to OFF or else, it will barely be functional")
    endif()
    message(STATUS "CCache found.")
  else()
    message(STATUS "CCache has not been found and it will not be used. Install CCache or set USE_CCACHE to OFF")
  endif()
endif()
