# Mark variables as used so cmake doesn't complain about them
mark_as_advanced(CMAKE_TOOLCHAIN_FILE)

# VCPKG toolchain options. 
option(VCPKG_VERBOSE "Enables messages from the VCPKG toolchain for debugging purposes." OFF)
mark_as_advanced(VCPKG_VERBOSE)

# Determine whether the toolchain is loaded during a try-compile configuration
get_property(_CMAKE_IN_TRY_COMPILE GLOBAL PROPERTY IN_TRY_COMPILE)

if (${CMAKE_VERSION} VERSION_LESS "3.6.0")
    set(_CMAKE_EMULATE_TRY_COMPILE_PLATFORM_VARIABLES ON)
else()
    set(_CMAKE_EMULATE_TRY_COMPILE_PLATFORM_VARIABLES OFF)
endif()

if(_CMAKE_IN_TRY_COMPILE AND _CMAKE_EMULATE_TRY_COMPILE_PLATFORM_VARIABLES)
    include("${CMAKE_CURRENT_SOURCE_DIR}/../vcpkg.config.cmake" OPTIONAL)
endif()

if(VCPKG_CHAINLOAD_TOOLCHAIN_FILE)
    include("${VCPKG_CHAINLOAD_TOOLCHAIN_FILE}")
endif()

if(VCPKG_TOOLCHAIN)
    return()
endif()

if(DEFINED CMAKE_CONFIGURATION_TYPES) #Generating with a multi config generator
    #If CMake does not have a mapping for MinSizeRel and RelWithDebInfo in imported targets
    #it will map those configuration to the first valid configuration in CMAKE_CONFIGURATION_TYPES.
    #By default this is the debug configuration which is wrong. 
    if(NOT DEFINED CMAKE_MAP_IMPORTED_CONFIG_MINSIZEREL)
        set(CMAKE_MAP_IMPORTED_CONFIG_MINSIZEREL "MinSizeRel;Release;")
        if(VCPKG_VERBOSE)
            message(STATUS "VCPKG-Info: CMAKE_MAP_IMPORTED_CONFIG_MINSIZEREL set to MinSizeRel;Release;")
        endif()
    endif()
    if(NOT DEFINED CMAKE_MAP_IMPORTED_CONFIG_RELWITHDEBINFO)
        set(CMAKE_MAP_IMPORTED_CONFIG_RELWITHDEBINFO "RelWithDebInfo;Release;")
        if(VCPKG_VERBOSE)
            message(STATUS "VCPKG-Info: CMAKE_MAP_IMPORTED_CONFIG_RELWITHDEBINFO set to RelWithDebInfo;Release;")
        endif()
    endif()
endif()

if(VCPKG_TARGET_TRIPLET)
elseif(CMAKE_GENERATOR_PLATFORM MATCHES "^[Ww][Ii][Nn]32$")
    set(_VCPKG_TARGET_TRIPLET_ARCH x86)
elseif(CMAKE_GENERATOR_PLATFORM MATCHES "^[Xx]64$")
    set(_VCPKG_TARGET_TRIPLET_ARCH x64)
elseif(CMAKE_GENERATOR_PLATFORM MATCHES "^[Aa][Rr][Mm]$")
    set(_VCPKG_TARGET_TRIPLET_ARCH arm)
elseif(CMAKE_GENERATOR_PLATFORM MATCHES "^[Aa][Rr][Mm]64$")
    set(_VCPKG_TARGET_TRIPLET_ARCH arm64)
else()
    if(CMAKE_GENERATOR MATCHES "^Visual Studio 14 2015 Win64$")
        set(_VCPKG_TARGET_TRIPLET_ARCH x64)
    elseif(CMAKE_GENERATOR MATCHES "^Visual Studio 14 2015 ARM$")
        set(_VCPKG_TARGET_TRIPLET_ARCH arm)
    elseif(CMAKE_GENERATOR MATCHES "^Visual Studio 14 2015$")
        set(_VCPKG_TARGET_TRIPLET_ARCH x86)
    elseif(CMAKE_GENERATOR MATCHES "^Visual Studio 15 2017 Win64$")
        set(_VCPKG_TARGET_TRIPLET_ARCH x64)
    elseif(CMAKE_GENERATOR MATCHES "^Visual Studio 15 2017 ARM$")
        set(_VCPKG_TARGET_TRIPLET_ARCH arm)
    elseif(CMAKE_GENERATOR MATCHES "^Visual Studio 15 2017$")
        set(_VCPKG_TARGET_TRIPLET_ARCH x86)
    elseif(CMAKE_GENERATOR MATCHES "^Visual Studio 16 2019$")
        set(_VCPKG_TARGET_TRIPLET_ARCH x64)
    else()
        find_program(_VCPKG_CL cl)
        if(_VCPKG_CL MATCHES "amd64/cl.exe$" OR _VCPKG_CL MATCHES "x64/cl.exe$")
            set(_VCPKG_TARGET_TRIPLET_ARCH x64)
        elseif(_VCPKG_CL MATCHES "arm/cl.exe$")
            set(_VCPKG_TARGET_TRIPLET_ARCH arm)
        elseif(_VCPKG_CL MATCHES "arm64/cl.exe$")
            set(_VCPKG_TARGET_TRIPLET_ARCH arm64)
        elseif(_VCPKG_CL MATCHES "bin/cl.exe$" OR _VCPKG_CL MATCHES "x86/cl.exe$")
            set(_VCPKG_TARGET_TRIPLET_ARCH x86)
        elseif(CMAKE_HOST_SYSTEM_PROCESSOR STREQUAL "x86_64")
            set(_VCPKG_TARGET_TRIPLET_ARCH x64)
        else()
            if( _CMAKE_IN_TRY_COMPILE )
                message(STATUS "Unable to determine target architecture, continuing without vcpkg.")
            else()
                message(WARNING "Unable to determine target architecture, continuing without vcpkg.")
            endif()
            set(VCPKG_TOOLCHAIN ON)
            return()
        endif()
    endif()
endif()

if(CMAKE_SYSTEM_NAME STREQUAL "WindowsStore" OR CMAKE_SYSTEM_NAME STREQUAL "WindowsPhone")
    set(_VCPKG_TARGET_TRIPLET_PLAT uwp)
elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux" OR (NOT CMAKE_SYSTEM_NAME AND CMAKE_HOST_SYSTEM_NAME STREQUAL "Linux"))
    set(_VCPKG_TARGET_TRIPLET_PLAT linux)
elseif(CMAKE_SYSTEM_NAME STREQUAL "Darwin" OR (NOT CMAKE_SYSTEM_NAME AND CMAKE_HOST_SYSTEM_NAME STREQUAL "Darwin"))
    set(_VCPKG_TARGET_TRIPLET_PLAT osx)
elseif(CMAKE_SYSTEM_NAME STREQUAL "Windows" OR (NOT CMAKE_SYSTEM_NAME AND CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows"))
    set(_VCPKG_TARGET_TRIPLET_PLAT windows)
elseif(CMAKE_SYSTEM_NAME STREQUAL "FreeBSD" OR (NOT CMAKE_SYSTEM_NAME AND CMAKE_HOST_SYSTEM_NAME STREQUAL "FreeBSD"))
    set(_VCPKG_TARGET_TRIPLET_PLAT freebsd)
endif()

set(VCPKG_TARGET_TRIPLET ${_VCPKG_TARGET_TRIPLET_ARCH}-${_VCPKG_TARGET_TRIPLET_PLAT} CACHE STRING "Vcpkg target triplet (ex. x86-windows)")
set(_VCPKG_TOOLCHAIN_DIR ${CMAKE_CURRENT_LIST_DIR})

if(NOT DEFINED _VCPKG_ROOT_DIR)
    # Detect .vcpkg-root to figure VCPKG_ROOT_DIR
    set(_VCPKG_ROOT_DIR_CANDIDATE ${CMAKE_CURRENT_LIST_DIR})
    while(IS_DIRECTORY ${_VCPKG_ROOT_DIR_CANDIDATE} AND NOT EXISTS "${_VCPKG_ROOT_DIR_CANDIDATE}/.vcpkg-root")
        get_filename_component(_VCPKG_ROOT_DIR_TEMP ${_VCPKG_ROOT_DIR_CANDIDATE} DIRECTORY)
        if (_VCPKG_ROOT_DIR_TEMP STREQUAL _VCPKG_ROOT_DIR_CANDIDATE) # If unchanged, we have reached the root of the drive
            message(FATAL_ERROR "Could not find .vcpkg-root")
        else()
            SET(_VCPKG_ROOT_DIR_CANDIDATE ${_VCPKG_ROOT_DIR_TEMP})
        endif()
    endwhile()
    set(_VCPKG_ROOT_DIR ${_VCPKG_ROOT_DIR_CANDIDATE} CACHE INTERNAL "Vcpkg root directory")
endif()
set(_VCPKG_INSTALLED_DIR ${_VCPKG_ROOT_DIR}/installed)

if(NOT EXISTS "${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}" AND NOT _CMAKE_IN_TRY_COMPILE)
    message(WARNING "There are no libraries installed for the Vcpkg triplet ${VCPKG_TARGET_TRIPLET}.")
endif()

if(CMAKE_BUILD_TYPE MATCHES "^[Dd][Ee][Bb][Uu][Gg]$" OR NOT DEFINED CMAKE_BUILD_TYPE) #Debug build: Put Debug paths before Release paths.
    list(APPEND CMAKE_PREFIX_PATH
        ${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/debug ${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}
    )
    list(APPEND CMAKE_LIBRARY_PATH
        ${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/debug/lib/manual-link ${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/lib/manual-link
    )
    list(APPEND CMAKE_FIND_ROOT_PATH
        ${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/debug ${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}
    )
else() #Release build: Put Release paths before Debug paths. Debug Paths are required so that CMake generates correct info in autogenerated target files.
    list(APPEND CMAKE_PREFIX_PATH
        ${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET} ${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/debug
    )
    list(APPEND CMAKE_LIBRARY_PATH
        ${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/lib/manual-link ${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/debug/lib/manual-link
    )
    list(APPEND CMAKE_FIND_ROOT_PATH
        ${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET} ${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/debug
    )
endif()

file(TO_CMAKE_PATH "$ENV{PROGRAMFILES}" _programfiles)
set(_PROGRAMFILESX86 "PROGRAMFILES(x86)")
file(TO_CMAKE_PATH "$ENV{${_PROGRAMFILESX86}}" _programfiles_x86)
set(CMAKE_SYSTEM_IGNORE_PATH
    "${_programfiles}/OpenSSL"
    "${_programfiles}/OpenSSL-Win32"
    "${_programfiles}/OpenSSL-Win64"
    "${_programfiles}/OpenSSL-Win32/lib/VC"
    "${_programfiles}/OpenSSL-Win64/lib/VC"
    "${_programfiles}/OpenSSL-Win32/lib/VC/static"
    "${_programfiles}/OpenSSL-Win64/lib/VC/static"
    "${_programfiles_x86}/OpenSSL"
    "${_programfiles_x86}/OpenSSL-Win32"
    "${_programfiles_x86}/OpenSSL-Win64"
    "${_programfiles_x86}/OpenSSL-Win32/lib/VC"
    "${_programfiles_x86}/OpenSSL-Win64/lib/VC"
    "${_programfiles_x86}/OpenSSL-Win32/lib/VC/static"
    "${_programfiles_x86}/OpenSSL-Win64/lib/VC/static"
    "C:/OpenSSL/"
    "C:/OpenSSL-Win32/"
    "C:/OpenSSL-Win64/"
    "C:/OpenSSL-Win32/lib/VC"
    "C:/OpenSSL-Win64/lib/VC"
    "C:/OpenSSL-Win32/lib/VC/static"
    "C:/OpenSSL-Win64/lib/VC/static"
)

list(APPEND CMAKE_PROGRAM_PATH ${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/tools)
file(GLOB _VCPKG_TOOLS_DIRS ${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/tools/*)
foreach(_VCPKG_TOOLS_DIR ${_VCPKG_TOOLS_DIRS})
    if(IS_DIRECTORY ${_VCPKG_TOOLS_DIR})
        list(APPEND CMAKE_PROGRAM_PATH ${_VCPKG_TOOLS_DIR})
    endif()
endforeach()

option(VCPKG_APPLOCAL_DEPS "Automatically copy dependencies into the output directory for executables." ON)
function(add_executable name)
    _add_executable(${ARGV})
    list(FIND ARGV "IMPORTED" IMPORTED_IDX)
    list(FIND ARGV "ALIAS" ALIAS_IDX)
    list(FIND ARGV "MACOSX_BUNDLE" MACOSX_BUNDLE_IDX)
    if(IMPORTED_IDX EQUAL -1 AND ALIAS_IDX EQUAL -1)
        if(VCPKG_APPLOCAL_DEPS)
            if(_VCPKG_TARGET_TRIPLET_PLAT MATCHES "windows|uwp")
                add_custom_command(TARGET ${name} POST_BUILD
                    COMMAND powershell -noprofile -executionpolicy Bypass -file ${_VCPKG_TOOLCHAIN_DIR}/msbuild/applocal.ps1
                        -targetBinary $<TARGET_FILE:${name}>
                        -installedDir "${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}$<$<CONFIG:Debug>:/debug>/bin"
                        -OutVariable out
                )
            elseif(_VCPKG_TARGET_TRIPLET_PLAT MATCHES "osx")
                if (NOT MACOSX_BUNDLE_IDX EQUAL -1)
                    add_custom_command(TARGET ${name} POST_BUILD
                    COMMAND python ${_VCPKG_TOOLCHAIN_DIR}/osx/applocal.py
                        $<TARGET_FILE:${name}>
                        "${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}$<$<CONFIG:Debug>:/debug>"
                    )
                endif()
            endif()
        endif()
        set_target_properties(${name} PROPERTIES VS_USER_PROPS do_not_import_user.props)
        set_target_properties(${name} PROPERTIES VS_GLOBAL_VcpkgEnabled false)
    endif()
endfunction()

function(add_library name)
    _add_library(${ARGV})
    list(FIND ARGV "IMPORTED" IMPORTED_IDX)
    list(FIND ARGV "INTERFACE" INTERFACE_IDX)
    list(FIND ARGV "ALIAS" ALIAS_IDX)
    if(IMPORTED_IDX EQUAL -1 AND INTERFACE_IDX EQUAL -1 AND ALIAS_IDX EQUAL -1)
        get_target_property(IS_LIBRARY_SHARED ${name} TYPE)
        if(VCPKG_APPLOCAL_DEPS AND _VCPKG_TARGET_TRIPLET_PLAT MATCHES "windows|uwp" AND (IS_LIBRARY_SHARED STREQUAL "SHARED_LIBRARY" OR IS_LIBRARY_SHARED STREQUAL "MODULE_LIBRARY"))
            add_custom_command(TARGET ${name} POST_BUILD
                COMMAND powershell -noprofile -executionpolicy Bypass -file ${_VCPKG_TOOLCHAIN_DIR}/msbuild/applocal.ps1
                    -targetBinary $<TARGET_FILE:${name}>
                    -installedDir "${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}$<$<CONFIG:Debug>:/debug>/bin"
                    -OutVariable out
            )
        endif()
        set_target_properties(${name} PROPERTIES VS_USER_PROPS do_not_import_user.props)
        set_target_properties(${name} PROPERTIES VS_GLOBAL_VcpkgEnabled false)
    endif()
endfunction()

macro(find_package name)
    string(TOLOWER "${name}" _vcpkg_lowercase_name)
    if(EXISTS "${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/share/${_vcpkg_lowercase_name}/vcpkg-cmake-wrapper.cmake")
        set(ARGS "${ARGV}")
        include(${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/share/${_vcpkg_lowercase_name}/vcpkg-cmake-wrapper.cmake)
    elseif("${name}" STREQUAL "Boost" AND EXISTS "${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/include/boost")
        # Checking for the boost headers disables this wrapper unless the user has installed at least one boost library
        set(Boost_USE_STATIC_LIBS OFF)
        set(Boost_USE_MULTITHREADED ON)
        unset(Boost_USE_STATIC_RUNTIME)
        set(Boost_NO_BOOST_CMAKE ON)
        unset(Boost_USE_STATIC_RUNTIME CACHE)
        set(Boost_COMPILER "-vc140")
        _find_package(${ARGV})
    elseif("${name}" STREQUAL "ICU" AND EXISTS "${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/include/unicode/utf.h")
        function(_vcpkg_find_in_list)
            list(FIND ARGV "COMPONENTS" COMPONENTS_IDX)
            set(COMPONENTS_IDX ${COMPONENTS_IDX} PARENT_SCOPE)
        endfunction()
        _vcpkg_find_in_list(${ARGV})
        if(NOT COMPONENTS_IDX EQUAL -1)
            _find_package(${ARGV} COMPONENTS data)
        else()
            _find_package(${ARGV})
        endif()
    elseif("${name}" STREQUAL "GSL" AND EXISTS "${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/include/gsl")
        _find_package(${ARGV})
        if(GSL_FOUND AND TARGET GSL::gsl)
            set_property( TARGET GSL::gslcblas APPEND PROPERTY IMPORTED_CONFIGURATIONS Release )
            set_property( TARGET GSL::gsl APPEND PROPERTY IMPORTED_CONFIGURATIONS Release )
            if( EXISTS "${GSL_LIBRARY_DEBUG}" AND EXISTS "${GSL_CBLAS_LIBRARY_DEBUG}")
            set_property( TARGET GSL::gsl APPEND PROPERTY IMPORTED_CONFIGURATIONS Debug )
            set_target_properties( GSL::gsl PROPERTIES IMPORTED_LOCATION_DEBUG "${GSL_LIBRARY_DEBUG}" )
                set_property( TARGET GSL::gslcblas APPEND PROPERTY IMPORTED_CONFIGURATIONS Debug )
                set_target_properties( GSL::gslcblas PROPERTIES IMPORTED_LOCATION_DEBUG "${GSL_CBLAS_LIBRARY_DEBUG}" )
            endif()
        endif()
    elseif("${name}" STREQUAL "CURL" AND EXISTS "${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/include/curl")
        _find_package(${ARGV})
        if(CURL_FOUND)
            if(EXISTS "${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/lib/nghttp2.lib")
                list(APPEND CURL_LIBRARIES
                    "debug" "${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/debug/lib/nghttp2.lib"
                    "optimized" "${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/lib/nghttp2.lib")
            endif()
        endif()
    elseif("${_vcpkg_lowercase_name}" STREQUAL "grpc" AND EXISTS "${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/share/grpc")
        _find_package(gRPC ${ARGN})
    else()
        _find_package(${ARGV})
    endif()
endmacro()

set(VCPKG_TOOLCHAIN ON)
set(_UNUSED ${CMAKE_ERROR_ON_ABSOLUTE_INSTALL_DESTINATION})
set(_UNUSED ${CMAKE_EXPORT_NO_PACKAGE_REGISTRY})
set(_UNUSED ${CMAKE_FIND_PACKAGE_NO_PACKAGE_REGISTRY})
set(_UNUSED ${CMAKE_FIND_PACKAGE_NO_SYSTEM_PACKAGE_REGISTRY})
set(_UNUSED ${CMAKE_INSTALL_SYSTEM_RUNTIME_LIBS_SKIP})

# Propogate these values to try-compile configurations so the triplet and toolchain load
if(NOT _CMAKE_IN_TRY_COMPILE)
    if(_CMAKE_EMULATE_TRY_COMPILE_PLATFORM_VARIABLES)
        file(TO_CMAKE_PATH "${VCPKG_CHAINLOAD_TOOLCHAIN_FILE}" _chainload_file)
        file(TO_CMAKE_PATH "${_VCPKG_ROOT_DIR}" _root_dir)
        file(WRITE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/vcpkg.config.cmake"
            "set(VCPKG_TARGET_TRIPLET \"${VCPKG_TARGET_TRIPLET}\" CACHE STRING \"\")\n"
            "set(VCPKG_APPLOCAL_DEPS \"${VCPKG_APPLOCAL_DEPS}\" CACHE STRING \"\")\n"
            "set(VCPKG_CHAINLOAD_TOOLCHAIN_FILE \"${_chainload_file}\" CACHE STRING \"\")\n"
            "set(_VCPKG_ROOT_DIR \"${_root_dir}\" CACHE STRING \"\")\n"
        )
    else()
        list(APPEND CMAKE_TRY_COMPILE_PLATFORM_VARIABLES 
            VCPKG_TARGET_TRIPLET
            VCPKG_APPLOCAL_DEPS
            VCPKG_CHAINLOAD_TOOLCHAIN_FILE
            _VCPKG_ROOT_DIR
        )
    endif()
endif()
