cmake_minimum_required(VERSION 3.15 FATAL_ERROR)
project(VulkanBootstrap
    LANGUAGES CXX
    DESCRIPTION "A Vulkan utility library to ease the initialization steps in Vulkan")

option(VK_BOOTSTRAP_DISABLE_WARNINGS "Disable warnings during compilation" OFF)
option(VK_BOOTSTRAP_WERROR "Enable warnings as errors during compilation" OFF)

add_library(vk-bootstrap-vulkan-headers INTERFACE)

set(VK_BOOTSTRAP_VULKAN_HEADER_DIR "" CACHE STRING "Specify the location of the Vulkan-Headers include directory.")
mark_as_advanced(VK_BOOTSTRAP_VULKAN_HEADER_DIR)

include(gen/CurrentBuildVulkanVersion.cmake)

if(NOT "${VK_BOOTSTRAP_VULKAN_HEADER_DIR}" STREQUAL "")
    target_include_directories(vk-bootstrap-vulkan-headers INTERFACE $<BUILD_INTERFACE:${VK_BOOTSTRAP_VULKAN_HEADER_DIR}>)
else ()
    find_package(Vulkan QUIET)

    if(${Vulkan_INCLUDE_DIR} STREQUAL "Vulkan_INCLUDE_DIR-NOTFOUND")
        include(FetchContent)
        FetchContent_Declare(
            VulkanHeaders
            GIT_REPOSITORY https://github.com/KhronosGroup/Vulkan-Headers
            GIT_TAG        ${VK_BOOTSTRAP_SOURCE_HEADER_VERSION_GIT_TAG}
        )
        FetchContent_MakeAvailable(VulkanHeaders)
        target_link_libraries(vk-bootstrap-vulkan-headers INTERFACE Vulkan::Headers)
    else()
        set_target_properties(vk-bootstrap-vulkan-headers PROPERTIES INTERFACE_INCLUDE_DIRECTORIES ${Vulkan_INCLUDE_DIR})
    endif()
endif()

add_library(vk-bootstrap STATIC src/VkBootstrap.h src/VkBootstrap.cpp src/VkBootstrapDispatch.h)
add_library(vk-bootstrap::vk-bootstrap ALIAS vk-bootstrap)

add_library(vk-bootstrap-compiler-warnings INTERFACE)

# Determine whether we're compiling with clang++
string(FIND "${CMAKE_CXX_COMPILER}" "clang++" VK_BOOTSTRAP_COMPILER_CLANGPP)
if(VK_BOOTSTRAP_COMPILER_CLANGPP GREATER -1)
    set(VK_BOOTSTRAP_COMPILER_CLANGPP 1)
else()
    set(VK_BOOTSTRAP_COMPILER_CLANGPP 0)
endif()

if(NOT VK_BOOTSTRAP_DISABLE_WARNINGS)
    target_compile_options(vk-bootstrap-compiler-warnings
          INTERFACE
          $<$<OR:$<CXX_COMPILER_ID:AppleClang>,$<CXX_COMPILER_ID:GNU>,${VK_BOOTSTRAP_COMPILER_CLANGPP}>:
          -Wall
          -Wextra
          -Wconversion
          -Wsign-conversion>
          $<$<CXX_COMPILER_ID:MSVC>:
          /W4>
          )

    if(VK_BOOTSTRAP_WERROR)
        target_compile_options(vk-bootstrap-compiler-warnings
            INTERFACE
            $<$<OR:$<CXX_COMPILER_ID:AppleClang>,$<CXX_COMPILER_ID:GNU>,${VK_BOOTSTRAP_COMPILER_CLANGPP}>:
            -pedantic-errors>
            $<$<CXX_COMPILER_ID:MSVC>:
            /WX>
            )
    endif()
endif()

target_include_directories(vk-bootstrap PUBLIC
    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src>
    $<INSTALL_INTERFACE:include>)
target_link_libraries(vk-bootstrap
    PRIVATE
        vk-bootstrap-compiler-warnings
        vk-bootstrap-vulkan-headers
        ${CMAKE_DL_LIBS})
target_compile_features(vk-bootstrap PUBLIC cxx_std_17)

include(GNUInstallDirs)
install(FILES src/VkBootstrap.h src/VkBootstrapDispatch.h DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
install(TARGETS
    vk-bootstrap
    vk-bootstrap-compiler-warnings
    vk-bootstrap-vulkan-headers
    EXPORT
        vk-bootstrap-targets)

# By default, we want to only build tests if this repo is built standalone, but still should be configurable by the user
if(CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME)
    set(VK_BOOTSTRAP_TEST_DEFAULT_VALUE ON)
else()
    set(VK_BOOTSTRAP_TEST_DEFAULT_VALUE OFF)
endif()
option(VK_BOOTSTRAP_TEST "Test Vk-Bootstrap with glfw and Catch2" ${VK_BOOTSTRAP_TEST_DEFAULT_VALUE})

if(VK_BOOTSTRAP_TEST)
    enable_testing()
    add_subdirectory(ext)
    add_subdirectory(tests)
    add_subdirectory(example)
endif ()