# SPDX-FileCopyrightText: 2026 citron Emulator Project
# SPDX-License-Identifier: GPL-2.0-or-later
#
# CMakeModules/dependencies.cmake
#
# CPM-managed dependencies.  Included when CITRON_USE_CPM=ON, for any platform
# (Linux native, Windows native via MSYS2, Linux→Windows cross-compile).
#
# All packages are fetched from source and built statically.  No system
# packages are assumed or required.  CPM_USE_LOCAL_PACKAGES is intentionally
# left OFF so behaviour is identical regardless of what the host has installed.
#
# Packages NOT managed here:
#   - vcpkg  (submodule; only used by MSVC/Android paths with CITRON_USE_BUNDLED_VCPKG=ON)
#   - Qt     (pre-built binaries via aqt — see CMakeModules/qt_download.cmake)
#
# Static linking: BUILD_SHARED_LIBS is forced OFF in externals/CMakeLists.txt;
# all CPM packages inherit this setting.


# ── Submodule & vcpkg Policy ──────────────────────────────────────────────────
# Force-disable reliance on git submodules and vcpkg. All external dependencies
# must be fetched and managed via CPM to ensure portability and build-time
# environment isolation.
set(CITRON_CHECK_SUBMODULES OFF CACHE BOOL "Force disable submodule presence checks" FORCE)
set(CITRON_USE_BUNDLED_VCPKG OFF CACHE BOOL "Force disable vcpkg usage" FORCE)

if (NOT COMMAND CPMAddPackage)
    message(FATAL_ERROR "CPM.cmake not loaded — include CMakeModules/CPM.cmake before this file")
endif()

# ── tzdb host capability check ────────────────────────────────────────────────
# tzdb_to_nx builds 'zic' from C source using the host compiler.
# On WIN32 hosts, Windows headers lack POSIX APIs (link, symlink, readlink,
# 2-arg mkdir) so the source build always fails.  Force the pre-built
# release artifact download path instead.
# On POSIX hosts (Linux, macOS) zic builds correctly; use CPMAddPackage.
if (WIN32)
    set(CITRON_DOWNLOAD_TIME_ZONE_DATA ON CACHE BOOL
        "Use pre-built timezone data (forced ON: host lacks POSIX build tools)"
        FORCE)
    set(CITRON_TZDB_USE_CPM FALSE)
    message(STATUS "[tzdb] WIN32 host: using pre-built timezone data")
else()
    set(CITRON_TZDB_USE_CPM TRUE)
endif()

# ═══════════════════════════════════════════════════════════════════════════════
# Core dependencies
# ═══════════════════════════════════════════════════════════════════════════════

# ── Boost ─────────────────────────────────────────────────────────────────────
if (NOT TARGET Boost::headers)
    set(BOOST_INCLUDE_LIBRARIES "algorithm;asio;container;context;crc;heap;icl;intrusive;process;range;spirit;test;timer;variant" CACHE STRING "Boost components to build")
    set(BOOST_ENABLE_CMAKE ON CACHE BOOL "Enable Boost CMake")
    set(BUILD_TESTING OFF CACHE BOOL "Disable testing")
    set(BUILD_SHARED_LIBS OFF CACHE BOOL "Disable shared libs")
    CPMAddPackage(
        NAME Boost
        URL "https://github.com/boostorg/boost/releases/download/boost-1.87.0/boost-1.87.0-cmake.tar.xz"
    )
    if (TARGET Boost::headers)
        set(_boost_headers_target "Boost::headers")
        get_target_property(_boost_headers_aliased "${_boost_headers_target}" ALIASED_TARGET)
        if (_boost_headers_aliased)
            set(_boost_headers_target "${_boost_headers_aliased}")
        endif()
        file(GLOB _boost_header_include_dirs LIST_DIRECTORIES true
            "${Boost_SOURCE_DIR}/libs/*/include")
        list(REMOVE_DUPLICATES _boost_header_include_dirs)
        if (_boost_header_include_dirs)
            target_include_directories("${_boost_headers_target}" SYSTEM INTERFACE ${_boost_header_include_dirs})
        endif()
    endif()
endif()

# ── fmt ───────────────────────────────────────────────────────────────────────
if (NOT TARGET fmt::fmt)
    CPMAddPackage(
        NAME fmt
        GITHUB_REPOSITORY fmtlib/fmt
        GIT_TAG 12.1.0
        OPTIONS "FMT_INSTALL OFF"
    )
endif()

# ── lz4 ───────────────────────────────────────────────────────────────────────
if (NOT TARGET lz4::lz4)
    CPMAddPackage(
        NAME lz4
        GITHUB_REPOSITORY lz4/lz4
        GIT_TAG v1.10.0
        SOURCE_SUBDIR build/cmake
        OPTIONS
            "LZ4_BUILD_CLI OFF"
            "LZ4_BUILD_LEGACY_LZ4C OFF"
            "BUILD_SHARED_LIBS OFF"
            "BUILD_STATIC_LIBS ON"
    )
    if (TARGET lz4_static AND NOT TARGET lz4::lz4)
        add_library(lz4::lz4 ALIAS lz4_static)
    endif()
endif()

# ── nlohmann-json (header-only) ───────────────────────────────────────────────
if (NOT TARGET nlohmann_json::nlohmann_json)
    CPMAddPackage(
        NAME nlohmann_json
        GITHUB_REPOSITORY nlohmann/json
        GIT_TAG v3.11.3
        OPTIONS "JSON_BuildTests OFF"
    )
endif()

# ── zlib ──────────────────────────────────────────────────────────────────────
if (NOT TARGET ZLIB::ZLIB)
    CPMAddPackage(
        NAME ZLIB
        GITHUB_REPOSITORY madler/zlib
        GIT_TAG v1.3.1
        OPTIONS "ZLIB_BUILD_EXAMPLES OFF"
    )
    if (TARGET zlibstatic AND NOT TARGET ZLIB::ZLIB)
        add_library(ZLIB::ZLIB ALIAS zlibstatic)
        set(ZLIB_FOUND TRUE CACHE BOOL "" FORCE)
        set(ZLIB_INCLUDE_DIRS "${ZLIB_SOURCE_DIR};${ZLIB_BINARY_DIR}" CACHE PATH "" FORCE)
    endif()
endif()

# ── zstd ──────────────────────────────────────────────────────────────────────
if (NOT TARGET zstd::libzstd_static)
    CPMAddPackage(
        NAME zstd
        GITHUB_REPOSITORY facebook/zstd
        GIT_TAG v1.5.6
        SOURCE_SUBDIR build/cmake
        OPTIONS
            "ZSTD_BUILD_PROGRAMS OFF"
            "ZSTD_BUILD_SHARED OFF"
            "ZSTD_BUILD_STATIC ON"
            "ZSTD_BUILD_TESTS OFF"
    )
    if (TARGET libzstd_static AND NOT TARGET zstd::libzstd_static)
        add_library(zstd::libzstd_static ALIAS libzstd_static)
        add_library(zstd::zstd ALIAS libzstd_static)
        set(zstd_FOUND TRUE CACHE BOOL "" FORCE)
    endif()
endif()

# ── OpenAL Soft ───────────────────────────────────────────────────────────────
if (NOT TARGET OpenAL::OpenAL)
    CPMAddPackage(
        NAME OpenAL
        GITHUB_REPOSITORY kcat/openal-soft
        GIT_TAG 1.24.3
        OPTIONS
            "ALSOFT_UTILS OFF"
            "ALSOFT_EXAMPLES OFF"
            "ALSOFT_TESTS OFF"
            "ALSOFT_INSTALL OFF"
            "ALSOFT_INSTALL_CONFIG OFF"
            "LIBTYPE STATIC"
    )
    if (TARGET OpenAL AND NOT TARGET OpenAL::OpenAL)
        add_library(OpenAL::OpenAL ALIAS OpenAL)
    endif()
    # Patch OpenAL's vendored fmt header to fix undeclared 'malloc' on some toolchains
    if (OpenAL_ADDED AND EXISTS "${OpenAL_SOURCE_DIR}/fmt-11.1.1/include/fmt/format.h")
        file(READ "${OpenAL_SOURCE_DIR}/fmt-11.1.1/include/fmt/format.h" _fmt_content)
        if (NOT _fmt_content MATCHES "#include <stdlib.h>")
            string(REPLACE "#include \"base.h\"" "#include \"base.h\"\n#include <stdlib.h>" _fmt_content "${_fmt_content}")
            file(WRITE "${OpenAL_SOURCE_DIR}/fmt-11.1.1/include/fmt/format.h" "${_fmt_content}")
        endif()
    endif()
endif()

# ── OpenSSL ───────────────────────────────────────────────────────────────────
if (ENABLE_OPENSSL OR ENABLE_WEB_SERVICE)
    include(${CMAKE_SOURCE_DIR}/CMakeModules/openssl_build.cmake)
endif()

# ── Catch2 (test framework) ───────────────────────────────────────────────────
if (CITRON_TESTS AND NOT TARGET Catch2::Catch2)
    CPMAddPackage(
        NAME Catch2
        GITHUB_REPOSITORY catchorg/Catch2
        GIT_TAG v3.7.1
        OPTIONS "CATCH_INSTALL_DOCS OFF"
    )
endif()

# ═══════════════════════════════════════════════════════════════════════════════
# Header-only / trivial packages
# ═══════════════════════════════════════════════════════════════════════════════

# ── unordered_dense ───────────────────────────────────────────────────────────
CPMAddPackage(
    NAME unordered_dense
    GITHUB_REPOSITORY martinus/unordered_dense
    GIT_TAG 7b55cab8418da1603496462ce3ccdb4cb1dc3368
    OPTIONS "BUILD_TESTING OFF"
)

# ── simpleini ─────────────────────────────────────────────────────────────────
if (NOT TARGET SimpleIni::SimpleIni)
    CPMAddPackage(
        NAME simpleini
        GITHUB_REPOSITORY brofield/simpleini
        GIT_TAG v4.22
    )
endif()

# ── cpp-jwt ───────────────────────────────────────────────────────────────────
if (ENABLE_WEB_SERVICE AND NOT TARGET cpp-jwt::cpp-jwt)
    CPMAddPackage(
        NAME cpp-jwt
        GITHUB_REPOSITORY arun11299/cpp-jwt
        GIT_TAG v1.4
        DOWNLOAD_ONLY TRUE
    )
    if (cpp-jwt_ADDED)
        add_library(cpp-jwt::cpp-jwt INTERFACE IMPORTED GLOBAL)
        target_include_directories(cpp-jwt::cpp-jwt INTERFACE "${cpp-jwt_SOURCE_DIR}/include")
    endif()
endif()

# ── cpp-httplib ───────────────────────────────────────────────────────────────
if (ENABLE_WEB_SERVICE AND NOT TARGET httplib::httplib)
    CPMAddPackage(
        NAME httplib
        GITHUB_REPOSITORY yhirose/cpp-httplib
        GIT_TAG v0.18.3
        DOWNLOAD_ONLY TRUE
    )
    if (httplib_ADDED)
        add_library(httplib::httplib INTERFACE IMPORTED GLOBAL)
        target_compile_features(httplib::httplib INTERFACE cxx_std_11)
        target_include_directories(httplib::httplib SYSTEM INTERFACE "${httplib_SOURCE_DIR}")
        target_compile_definitions(httplib::httplib INTERFACE CPPHTTPLIB_OPENSSL_SUPPORT)
        target_link_libraries(httplib::httplib INTERFACE
            $<$<TARGET_EXISTS:Threads::Threads>:Threads::Threads>
            OpenSSL::SSL
            OpenSSL::Crypto
            $<$<PLATFORM_ID:Windows>:ws2_32>
            $<$<PLATFORM_ID:Windows>:crypt32>
            $<$<PLATFORM_ID:Windows>:cryptui>
        )
    endif()
endif()

# ── xbyak ─────────────────────────────────────────────────────────────────────
if ((ARCHITECTURE_x86 OR ARCHITECTURE_x86_64) AND NOT TARGET xbyak::xbyak)
    CPMAddPackage(
        NAME xbyak
        GITHUB_REPOSITORY herumi/xbyak
        GIT_TAG 560ca671421e47e32d3c8270623aaa74454570f4
    )
endif()

# ── Vulkan-Headers ────────────────────────────────────────────────────────────
option(CITRON_USE_VULKAN_STUB "Use pre-generated Vulkan stub instead of fetching Vulkan-Headers" ON)

if (CITRON_USE_EXTERNAL_VULKAN_HEADERS AND NOT TARGET Vulkan::Headers)
    if (CITRON_USE_VULKAN_STUB AND
        NOT CITRON_USE_EXTERNAL_VULKAN_UTILITY_LIBRARIES AND
        EXISTS "${CMAKE_SOURCE_DIR}/externals/vulkan-stub/include")
        add_library(Vulkan-Headers INTERFACE)
        target_include_directories(Vulkan-Headers SYSTEM INTERFACE
            "${CMAKE_SOURCE_DIR}/externals/vulkan-stub/include")
        target_compile_definitions(Vulkan-Headers INTERFACE VK_ENABLE_BETA_EXTENSIONS)
        add_library(Vulkan::Headers ALIAS Vulkan-Headers)
    else()
        CPMAddPackage(
            NAME Vulkan-Headers
            GITHUB_REPOSITORY KhronosGroup/Vulkan-Headers
            GIT_TAG v1.4.337
        )
    endif()
endif()

# ── Vulkan-Utility-Libraries ──────────────────────────────────────────────────
if (CITRON_USE_EXTERNAL_VULKAN_UTILITY_LIBRARIES AND NOT TARGET Vulkan::LayerSettings)
    CPMAddPackage(
        NAME Vulkan-Utility-Libraries
        GITHUB_REPOSITORY KhronosGroup/Vulkan-Utility-Libraries
        GIT_TAG v1.4.337
        OPTIONS "BUILD_TESTS OFF"
    )
endif()

# ── VulkanMemoryAllocator ─────────────────────────────────────────────────────
if (NOT TARGET GPUOpen::VulkanMemoryAllocator)
    CPMAddPackage(
        NAME VulkanMemoryAllocator
        GITHUB_REPOSITORY GPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator
        GIT_TAG v3.1.0
        SYSTEM YES
        OPTIONS "VMA_BUILD_SAMPLES OFF"
    )
endif()

# ═══════════════════════════════════════════════════════════════════════════════
# Compiled libraries — upstream repos
# ═══════════════════════════════════════════════════════════════════════════════

# ── SPIRV-Headers ─────────────────────────────────────────────────────────────
# Must be declared before sirit.
if (NOT TARGET SPIRV-Headers)
    CPMAddPackage(
        NAME SPIRV-Headers
        GITHUB_REPOSITORY KhronosGroup/SPIRV-Headers
        GIT_TAG vulkan-sdk-1.4.304.1
        OPTIONS
            "SPIRV_HEADERS_SKIP_EXAMPLES ON"
            "SPIRV_HEADERS_SKIP_INSTALL ON"
    )
endif()

# ── enet ──────────────────────────────────────────────────────────────────────
if (NOT TARGET enet::enet)
    CPMAddPackage(
        NAME enet
        GITHUB_REPOSITORY lsalzman/enet
        GIT_TAG 39a72ab1990014eb399cee9d538fd529df99c6a0
    )
    if (TARGET enet AND NOT TARGET enet::enet)
        target_include_directories(enet INTERFACE
            $<BUILD_INTERFACE:${enet_SOURCE_DIR}/include>)
        add_library(enet::enet ALIAS enet)
    endif()
endif()

# ── opus ──────────────────────────────────────────────────────────────────────
if (NOT TARGET Opus::opus)
    CPMAddPackage(
        NAME opus
        GITHUB_REPOSITORY xiph/opus
        GIT_TAG v1.5.2
        OPTIONS
            "OPUS_BUILD_TESTING OFF"
            "OPUS_BUILD_PROGRAMS OFF"
            "OPUS_INSTALL_PKG_CONFIG_MODULE OFF"
            "OPUS_INSTALL_CMAKE_CONFIG_MODULE OFF"
    )
endif()

# ── cubeb ─────────────────────────────────────────────────────────────────────
if (ENABLE_CUBEB AND NOT TARGET cubeb::cubeb)
    CPMAddPackage(
        NAME cubeb
        GITHUB_REPOSITORY mozilla/cubeb
        GIT_TAG 48689ae7a73caeb747953f9ed664dc71d2f918d8
        OPTIONS
            "BUILD_TESTS OFF"
            "BUILD_TOOLS OFF"
            "BUILD_RUST_LIBS OFF"
    )
    if (TARGET cubeb AND NOT TARGET cubeb::cubeb)
        add_library(cubeb::cubeb ALIAS cubeb)
    endif()
    if (NOT MSVC)
        if (TARGET speex)
            target_compile_options(speex PRIVATE -Wno-sign-compare)
        endif()
        if (TARGET cubeb)
            target_compile_options(cubeb PRIVATE -Wno-implicit-const-int-float-conversion)
        endif()
    endif()
endif()

# ── SDL2 ──────────────────────────────────────────────────────────────────────
if (CITRON_USE_EXTERNAL_SDL2 AND NOT TARGET SDL2::SDL2)
    CPMAddPackage(
        NAME SDL2
        GITHUB_REPOSITORY libsdl-org/SDL
        GIT_TAG release-2.32.10
        OPTIONS
            "SDL_SHARED OFF"
            "SDL_STATIC ON"
            "SDL_TEST OFF"
    )
endif()

# ── tzdb_to_nx ────────────────────────────────────────────────────────────────
# On POSIX hosts: fetch source via CPM; nx_tzdb/CMakeLists.txt builds zic and
# generates the timezone headers at build time.
# On WIN32 hosts: CITRON_TZDB_USE_CPM=FALSE (set above); nx_tzdb downloads the
# pre-built 221202.zip archive instead.
if (CITRON_TZDB_USE_CPM)
    CPMAddPackage(
        NAME tzdb_to_nx
        GITHUB_REPOSITORY lat9nq/tzdb_to_nx
        GIT_TAG 97929690234f2b4add36b33657fe3fe09bd57dfd
        DOWNLOAD_ONLY YES
    )
endif()
if (tzdb_to_nx_SOURCE_DIR)
    set(TZDB_TO_NX_SOURCE_DIR "${tzdb_to_nx_SOURCE_DIR}")
endif()

# ═══════════════════════════════════════════════════════════════════════════════
# Forked repos — pinned to exact SHAs
# ═══════════════════════════════════════════════════════════════════════════════

# ── mbedtls (yuzu-mirror fork) ────────────────────────────────────────────────
if (NOT TARGET mbedtls)
    CPMAddPackage(
        NAME mbedtls
        GITHUB_REPOSITORY yuzu-mirror/mbedtls
        GIT_TAG 8c88150ca139e06aa2aae8349df8292a88148ea1
        OPTIONS
            "ENABLE_TESTING OFF"
            "ENABLE_PROGRAMS OFF"
            "MBEDTLS_FATAL_WARNINGS OFF"
    )
    if (TARGET mbedtls)
        target_include_directories(mbedtls PUBLIC ${mbedtls_SOURCE_DIR}/include)
    endif()
    if (TARGET mbedtls AND NOT MSVC)
        target_compile_options(mbedcrypto PRIVATE
            -Wno-unused-but-set-variable
            -Wno-string-concatenation)
    endif()
endif()

# ── oaknut (yuzu-mirror fork) — AArch64 only ──────────────────────────────────
if (ARCHITECTURE_arm64 AND NOT TARGET merry::oaknut)
    CPMAddPackage(
        NAME oaknut
        GITHUB_REPOSITORY yuzu-mirror/oaknut
        GIT_TAG 9d091109deb445bc6e9289c6195a282b7c993d49
    )
endif()

# ── sirit (yuzu-mirror fork) ──────────────────────────────────────────────────
# sirit needs SPIRV-Headers. CPM already populated it above.
if (NOT TARGET sirit)
    set(SIRIT_USE_SYSTEM_SPIRV_HEADERS ON)
    CPMAddPackage(
        NAME sirit
        GITHUB_REPOSITORY yuzu-mirror/sirit
        GIT_TAG ab75463999f4f3291976b079d42d52ee91eebf3f
    )
endif()

# ── dynarmic (xinitrcn1 fork) ─────────────────────────────────────────────────
if ((ARCHITECTURE_x86_64 OR ARCHITECTURE_arm64) AND NOT (MSVC AND ARCHITECTURE_arm64))
    if (NOT TARGET dynarmic::dynarmic)
        CPMAddPackage(
            NAME dynarmic
            GITHUB_REPOSITORY xinitrcn1/dynarmic
            GIT_TAG b280da7792d247a9910bc6d590af9454810fc64f
            OPTIONS
                "DYNARMIC_USE_PRECOMPILED_HEADERS ${CITRON_USE_PRECOMPILED_HEADERS}"
                "DYNARMIC_IGNORE_ASSERTS ON"
                "DYNARMIC_TESTS OFF"
        )
        if (TARGET dynarmic AND NOT TARGET dynarmic::dynarmic)
            add_library(dynarmic::dynarmic ALIAS dynarmic)
        endif()

        if (CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND dynarmic_ADDED)
            execute_process(
                COMMAND git apply --ignore-whitespace
                        "${CMAKE_SOURCE_DIR}/patches/mcl_clang_template_fix.patch"
                WORKING_DIRECTORY "${dynarmic_SOURCE_DIR}/externals/mcl"
                RESULT_VARIABLE _mcl_patch
                OUTPUT_QUIET ERROR_QUIET
            )
        endif()
    endif()
endif()

# ── discord-rpc (yuzu-mirror fork) ───────────────────────────────────────────
if (USE_DISCORD_PRESENCE AND NOT TARGET DiscordRPC::discord-rpc)
    CPMAddPackage(
        NAME discord-rpc
        GITHUB_REPOSITORY yuzu-mirror/discord-rpc
        GIT_TAG 20cc99aeffa08a4834f156b6ab49ed68618cf94a
        OPTIONS "BUILD_EXAMPLES OFF"
    )
    if (discord-rpc_ADDED)
        execute_process(
            COMMAND git apply --ignore-whitespace
                    "${CMAKE_SOURCE_DIR}/patches/rapidjson-compiler-fix.patch"
            WORKING_DIRECTORY "${discord-rpc_SOURCE_DIR}/thirdparty/rapidjson-1.1.0"
            RESULT_VARIABLE _rj_patch OUTPUT_QUIET ERROR_QUIET
        )
        execute_process(
            COMMAND git apply -p0 --ignore-whitespace
                    "${CMAKE_SOURCE_DIR}/patches/discord-rpc-wclass-memaccess-fix.patch"
            WORKING_DIRECTORY "${discord-rpc_SOURCE_DIR}"
            RESULT_VARIABLE _dr_patch OUTPUT_QUIET ERROR_QUIET
        )
    endif()
    if (TARGET discord-rpc AND NOT TARGET DiscordRPC::discord-rpc)
        target_include_directories(discord-rpc INTERFACE
            $<BUILD_INTERFACE:${discord-rpc_SOURCE_DIR}/include>)
        add_library(DiscordRPC::discord-rpc ALIAS discord-rpc)
    endif()
endif()

# ── breakpad (yuzu-mirror fork) ───────────────────────────────────────────────
# Has no usable CMakeLists of its own.  Fetched with DOWNLOAD_ONLY so the
# source is available; externals/CMakeLists.txt contains the build rules and
# uses ${breakpad_SOURCE_DIR} when CPM is active.
if (CITRON_CRASH_DUMPS AND NOT TARGET libbreakpad_client)
    CPMAddPackage(
        NAME breakpad
        GITHUB_REPOSITORY yuzu-mirror/breakpad
        GIT_TAG c89f9dddc793f19910ef06c13e4fd240da4e7a59
        DOWNLOAD_ONLY YES
    )
endif()

# ── libadrenotools — Android only ─────────────────────────────────────────────
if (ANDROID AND ARCHITECTURE_arm64)
    CPMAddPackage(
        NAME libadrenotools
        GITHUB_REPOSITORY bylaws/libadrenotools
        GIT_TAG 5cd3f5c5ceea6d9e9d435ccdd922d9b99e55d10b
    )
endif()

# ═══════════════════════════════════════════════════════════════════════════════
# libusb wrapper
# ═══════════════════════════════════════════════════════════════════════════════
# libusb lives at externals/libusb/libusb (nested).  The wrapper CMakeLists at
# externals/libusb/ builds it manually using LIBUSB_CPM_SOURCE_DIR as the root.
if (ENABLE_LIBUSB AND NOT TARGET libusb::usb)
    CPMAddPackage(
        NAME libusb_src
        GITHUB_REPOSITORY libusb/libusb
        GIT_TAG v1.0.27
        DOWNLOAD_ONLY YES
    )
    if (libusb_src_ADDED)
        set(LIBUSB_CPM_SOURCE_DIR ${libusb_src_SOURCE_DIR} CACHE INTERNAL "")
    endif()
endif()

# ═══════════════════════════════════════════════════════════════════════════════
# FFmpeg
# ═══════════════════════════════════════════════════════════════════════════════
# FFmpeg uses autotools, not CMake, so CPM can only download the source.
# The actual build is handled by externals/ffmpeg/CMakeLists.txt at build time
# using autoconf+make.  FFMPEG_CPM_SOURCE_DIR tells it where the source landed.
#
# On Windows: the build script pre-builds static FFmpeg before cmake runs and
# passes CITRON_FFMPEG_STATIC_DIR.  The CPM download is then informational only.

if (DEFINED CITRON_FFMPEG_STATIC_DIR)
    # Pre-built static libs supplied externally (Windows build script path).
    set(FFmpeg_PATH "${CITRON_FFMPEG_STATIC_DIR}")
    set(FFmpeg_INCLUDE_DIR "${FFmpeg_PATH}/include")
    set(FFmpeg_LIBRARIES
        "${FFmpeg_PATH}/lib/libavfilter.a"
        "${FFmpeg_PATH}/lib/libswscale.a"
        "${FFmpeg_PATH}/lib/libswresample.a"
        "${FFmpeg_PATH}/lib/libavcodec.a"
        "${FFmpeg_PATH}/lib/libavutil.a"
    )
    if (WIN32)
        find_library(FFmpeg_ICONV_LIBRARY NAMES iconv libiconv)
        if (FFmpeg_ICONV_LIBRARY)
            list(APPEND FFmpeg_LIBRARIES "${FFmpeg_ICONV_LIBRARY}")
        endif()
        list(APPEND FFmpeg_LIBRARIES bcrypt m)
    endif()
    set(FFmpeg_FOUND TRUE)
elseif (CITRON_USE_BUNDLED_FFMPEG)
    # Download source for the autotools build in externals/ffmpeg/CMakeLists.txt.
    CPMAddPackage(
        NAME ffmpeg_src
        GITHUB_REPOSITORY FFmpeg/FFmpeg
        GIT_TAG n8.0
        DOWNLOAD_ONLY YES
    )
    if (ffmpeg_src_ADDED)
        set(FFMPEG_CPM_SOURCE_DIR "${ffmpeg_src_SOURCE_DIR}" CACHE INTERNAL
            "FFmpeg source location for the autotools bundled build")
    endif()
endif()

# ── Dependency Versions (Qt, ICU, XCB) ─────────────────────────────────────────
set(CITRON_QT_VERSION "6.9.3" CACHE STRING "Qt version to download via aqt")

set(CITRON_ICU_REPO "unicode-org/icu" CACHE STRING "ICU GitHub repository")
set(CITRON_ICU_TAG "release-73-2" CACHE STRING "ICU git tag/version")

set(CITRON_XCB_MACROS_VER "1.20.2" CACHE STRING "XCB util-macros version")
set(CITRON_XCB_PROTO_VER "1.17.0" CACHE STRING "XCB proto version")
set(CITRON_XCB_XAU_VER "1.0.11" CACHE STRING "XCB libXau version")
set(CITRON_XCB_XDMCP_VER "1.1.5" CACHE STRING "XCB libXdmcp version")
set(CITRON_XCB_LIBXCB_VER "1.16" CACHE STRING "XCB libxcb version")
set(CITRON_XCB_UTIL_VER "0.4.1" CACHE STRING "XCB util version")
set(CITRON_XCB_CURSOR_VER "0.1.6" CACHE STRING "XCB cursor version")
set(CITRON_XCB_IMAGE_VER "0.4.1" CACHE STRING "XCB image version")
set(CITRON_XCB_KEYSYMS_VER "0.4.1" CACHE STRING "XCB keysyms version")
set(CITRON_XCB_RENDERUTIL_VER "0.3.10" CACHE STRING "XCB renderutil version")
set(CITRON_XCB_WM_VER "0.4.2" CACHE STRING "XCB wm version")

# ═══════════════════════════════════════════════════════════════════════════════
# Qt
# ═══════════════════════════════════════════════════════════════════════════════
# Qt uses a proprietary distribution model incompatible with CPM source fetches.
# Pre-built binaries are downloaded via aqt (pip install aqtinstall).
# See CMakeModules/qt_download.cmake for details.
if (ENABLE_QT AND NOT USE_SYSTEM_QT)
    include(${CMAKE_SOURCE_DIR}/CMakeModules/qt_download.cmake)
    if (CMAKE_SYSTEM_NAME STREQUAL "Linux")
        include(${CMAKE_SOURCE_DIR}/CMakeModules/icu_build.cmake)
        include(${CMAKE_SOURCE_DIR}/CMakeModules/xcb_build.cmake)
    endif()
endif()

message(STATUS "[CPM] All dependency packages configured")