cmake_minimum_required(VERSION 3.30)
project(vulkan_test)

set(CMAKE_CXX_STANDARD 26)
set(GLFW_USE_WAYLAND ON)

find_package(Vulkan REQUIRED)
find_package(glfw3 3.3 REQUIRED)

# Suche nach dem glslc Compiler
find_program(GLSLC glslc)
if(NOT GLSLC)
    message(FATAL_ERROR "glslc compiler not found. Please install the Vulkan SDK.")
endif()

# Alle Shader-Dateien im Verzeichnis ./shaders sammeln
file(GLOB SHADER_FILES
        "${CMAKE_CURRENT_SOURCE_DIR}/shaders/*.vert"
        "${CMAKE_CURRENT_SOURCE_DIR}/shaders/*.frag"
)

set(SPIRV_SHADERS "")
foreach(SHADER ${SHADER_FILES})
    # Dateiname extrahieren
    get_filename_component(SHADER_NAME ${SHADER} NAME)
    # Zielpfad für die kompilierten Shader im Build-Verzeichnis
    set(SPIRV "${CMAKE_CURRENT_BINARY_DIR}/shaders/${SHADER_NAME}.spv")

    # Custom Command zum Kompilieren des Shaders
    add_custom_command(
            OUTPUT ${SPIRV}
            COMMAND ${GLSLC} ${SHADER} -o ${SPIRV}
            DEPENDS ${SHADER}
            COMMENT "Compiling ${SHADER_NAME}"
    )

    list(APPEND SPIRV_SHADERS ${SPIRV})
endforeach()

# Custom Target, das alle Shader kompiliert
add_custom_target(compile_shaders ALL DEPENDS ${SPIRV_SHADERS})

# Das eigentliche Executable
add_executable(vulkan_test
        main.cpp
        vulkan/vulkan_app.cpp
        vulkan/vulkan_app.hpp
)

target_link_libraries(vulkan_test PRIVATE Vulkan::Vulkan glfw)

# Sicherstellen, dass die Shader vor dem Bauen des Executables kompiliert werden
add_dependencies(vulkan_test compile_shaders)