cmake_minimum_required(VERSION 3.27)

cmake_policy(SET CMP0135 NEW)

project(pke VERSION 0.0)

set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED True)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC -pthread")
set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -O0 -g")
set(CMAKE_CXX_FLAGS_RELEASE "-O3 -s DNDEBUG")

set(PKE_SOURCE_FILES
	src/main.cpp
	src/macros.hpp
	src/components.hpp
	src/components.cpp
	src/ecs.hpp
	src/ecs.cpp
	src/entities.hpp
	src/entities.cpp
	src/event.hpp
	src/event.cpp
	src/game.hpp
	src/game.cpp
	src/memory.hpp
	src/memory.cpp
	src/memory-allocator.hpp
	src/dynamic-array.hpp
	src/dynamic-array.cpp
	src/asset-manager.hpp
	src/asset-manager.cpp
  src/vendor/cgltf-include.hpp
  src/vendor/cgltf-include.cpp
	src/vendor/glm_include.hpp
  src/vendor/stb_image_include.hpp
  src/vendor/stb_image_include.cpp
	src/window.hpp
	src/window.cpp
)

include(FetchContent)
FetchContent_Declare(
    imguidocked
    URL https://github.com/ocornut/imgui/archive/762ec445e63a95c1545b18b28d528f8ce38a9afd.zip
)

FetchContent_GetProperties(imguidocked)
if(NOT imguidocked_POPULATED)
  FetchContent_Populate(imguidocked)
endif()

set(ImGuiDockedFiles 
    ${imguidocked_SOURCE_DIR}/imconfig.h
    ${imguidocked_SOURCE_DIR}/imgui.cpp
    ${imguidocked_SOURCE_DIR}/imgui.h
    ${imguidocked_SOURCE_DIR}/imgui_demo.cpp
    ${imguidocked_SOURCE_DIR}/imgui_draw.cpp
    ${imguidocked_SOURCE_DIR}/imgui_internal.h
    ${imguidocked_SOURCE_DIR}/imgui_tables.cpp
    ${imguidocked_SOURCE_DIR}/imgui_widgets.cpp
    ${imguidocked_SOURCE_DIR}/imstb_rectpack.h
    ${imguidocked_SOURCE_DIR}/imstb_textedit.h
    ${imguidocked_SOURCE_DIR}/imstb_truetype.h
    ${imguidocked_SOURCE_DIR}/backends/imgui_impl_glfw.cpp
    ${imguidocked_SOURCE_DIR}/backends/imgui_impl_glfw.h
    ${imguidocked_SOURCE_DIR}/backends/imgui_impl_vulkan.cpp
    ${imguidocked_SOURCE_DIR}/backends/imgui_impl_vulkan.h
    ${imguidocked_SOURCE_DIR}/misc/cpp/imgui_stdlib.cpp
    ${imguidocked_SOURCE_DIR}/misc/cpp/imgui_stdlib.h
)
add_library(imguidocked ${ImGuiDockedFiles})
target_include_directories(imguidocked PUBLIC ${imguidocked_SOURCE_DIR})

find_package(Vulkan REQUIRED)
if (Vulkan_FOUND)
    message(STATUS "Vulkan found: " ${Vulkan_INCLUDE_DIR})
endif (Vulkan_FOUND)

add_executable(pke
    ${PKE_SOURCE_FILES}
)

if (Vulkan_FOUND)
    target_link_libraries(pke PUBLIC ${Vulkan_LIBRARIES})
    target_include_directories(pke PUBLIC ${Vulkan_INCLUDE_DIR})
endif (Vulkan_FOUND)

set(SHADER_OUTPUT_DIR ${PROJECT_BINARY_DIR}/assets/shaders)
set(SHADER_DIR ${CMAKE_CURRENT_SOURCE_DIR}/assets/shaders)
file(MAKE_DIRECTORY ${SHADER_OUTPUT_DIR})
set(SHADERS 
	${SHADER_DIR}/present.vert
	${SHADER_DIR}/present.frag
)

foreach(SHADER IN LISTS SHADERS)
    get_filename_component(FILENAME ${SHADER} NAME)
    message(STATUS "Before Shader Compile: ${FILENAME}")
    add_custom_command(OUTPUT ${SHADER_OUTPUT_DIR}/${FILENAME}.spv
        COMMAND ${Vulkan_GLSLC_EXECUTABLE} ${SHADER} -o ${SHADER_OUTPUT_DIR}/${FILENAME}.spv
        DEPENDS ${SHADER}
        COMMENT "Compiling ${FILENAME}")
    list(APPEND SPV_SHADERS ${SHADER_OUTPUT_DIR}/${FILENAME}.spv)
endforeach()

add_custom_target(shaders ALL DEPENDS ${SPV_SHADERS})

find_package(PkgConfig REQUIRED)
pkg_search_module(GLFW REQUIRED glfw3)
if (GLFW_FOUND)
    message(STATUS "GLFW found: " ${GLFW_INCLUDE_DIR})
    target_link_libraries(pke PUBLIC ${GLFW_LIBRARIES})
    target_include_directories(pke PUBLIC ${GLFW_INCLUDE_DIR})
endif (GLFW_FOUND)

find_package(glm REQUIRED)
if (glm_FOUND)
	message(STATUS "glm found: " ${glm_INCLUDE_DIR})
	target_link_libraries(pke PUBLIC ${glm_LIBRARIES})
	target_include_directories(pke PUBLIC ${glm_INCLUDE_DIR})
endif (glm_FOUND)

FetchContent_Declare(stb URL https://github.com/nothings/stb/archive/5736b15f7ea0ffb08dd38af21067c314d6a3aae9.zip)
FetchContent_MakeAvailable(stb)
target_include_directories(pke PUBLIC "${PROJECT_BINARY_DIR}/_deps/stb-src")

FetchContent_Declare(cgltf URL https://github.com/jkuhlmann/cgltf/archive/271614ce5fa8bed6daf3bc824d12a3a652ebdb15.zip)
FetchContent_MakeAvailable(cgltf)
target_include_directories(pke PUBLIC "${PROJECT_BINARY_DIR}/_deps/cgltf-src")

target_include_directories(pke PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/src")

target_link_libraries(pke PUBLIC imguidocked)

add_dependencies(pke shaders)