cmake_minimum_required(VERSION 3.20)

# =============================
# Project / Compiler
# =============================
project(cube LANGUAGES C CXX)

set(CMAKE_CXX_STANDARD 23)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)

if(NOT CMAKE_BUILD_TYPE)
    set(CMAKE_BUILD_TYPE Release)
endif()

# =============================
# Sources
# =============================
file(GLOB_RECURSE CUBE_SOURCES
    ${CMAKE_CURRENT_SOURCE_DIR}/src/*.cpp
    ${CMAKE_CURRENT_SOURCE_DIR}/src/*.c
)

add_executable(${PROJECT_NAME} ${CUBE_SOURCES})

target_include_directories(${PROJECT_NAME} PRIVATE
    ${CMAKE_CURRENT_SOURCE_DIR}/src
)

# =============================
# Compile definitions
# =============================
target_compile_definitions(${PROJECT_NAME} PRIVATE
    VK_NO_PROTOTYPES
    VMA_STATIC_VULKAN_FUNCTIONS=0
    VMA_DYNAMIC_VULKAN_FUNCTIONS=1
    VMA_VULKAN_VERSION=1003000
)

# =============================
# Warnings
# =============================
if(CMAKE_CXX_COMPILER_ID MATCHES "Clang|GNU")
    target_compile_options(${PROJECT_NAME} PRIVATE
        -Wall
        -Wextra
        -Wpedantic
        -Wconversion
        -Wshadow
        -Wnull-dereference
        -Wdouble-promotion
        -Wimplicit-fallthrough
    )
endif()

# =============================
# Dependencies (vendored)
# =============================

# ---- spdlog (header-only)
add_subdirectory(external/spdlog)
target_link_libraries(${PROJECT_NAME} PRIVATE spdlog::spdlog_header_only)

# ---- Vulkan Memory Allocator
add_subdirectory(external/VulkanMemoryAllocator)
target_link_libraries(${PROJECT_NAME} PRIVATE VulkanMemoryAllocator)

# ---- vk-bootstrap
add_subdirectory(external/vk-bootstrap)
target_link_libraries(${PROJECT_NAME} PRIVATE vk-bootstrap::vk-bootstrap)

# ---- SPIR-V stack (required by shaderc)
add_subdirectory(external/spirv-headers)
add_subdirectory(external/SPIRV-Tools)
add_subdirectory(external/glslang)

# ---- shaderc
set(SHADERC_SKIP_TESTS ON CACHE BOOL "" FORCE)
set(SHADERC_SKIP_EXAMPLES ON CACHE BOOL "" FORCE)
set(SHADERC_SKIP_INSTALL ON CACHE BOOL "" FORCE)
set(SHADERC_ENABLE_SHARED_CRT OFF CACHE BOOL "" FORCE)
set(SHADERC_ENABLE_SPIRV_TOOLS ON CACHE BOOL "" FORCE)

add_subdirectory(external/shaderc)
target_link_libraries(${PROJECT_NAME} PRIVATE shaderc_shared)

# =============================
# System dependencies
# =============================
find_package(Vulkan REQUIRED)
find_package(Threads REQUIRED)
find_package(PkgConfig REQUIRED)

pkg_check_modules(LIBDRM REQUIRED libdrm)

target_include_directories(${PROJECT_NAME} PRIVATE
    ${LIBDRM_INCLUDE_DIRS}
)

target_link_libraries(${PROJECT_NAME} PRIVATE
    Vulkan::Vulkan
    Threads::Threads
    ${LIBDRM_LIBRARIES}
)