cmake_minimum_required(VERSION 4.0)

project(wgpu-wasm LANGUAGES C CXX)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED TRUE)

add_custom_target(${CMAKE_PROJECT_NAME}_html COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_SOURCE_DIR}/assets/index.html ${CMAKE_CURRENT_BINARY_DIR}/index.html
					DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/assets/index.html)

add_executable(${CMAKE_PROJECT_NAME} src/main.cpp)
add_dependencies(${CMAKE_PROJECT_NAME} ${CMAKE_PROJECT_NAME}_html)

target_compile_options(${CMAKE_PROJECT_NAME} PRIVATE $<$<CXX_COMPILER_ID:Msvc>:/W4 /WX> $<$<NOT:$<CXX_COMPILER_ID:Msvc>>:-Wall -Wextra -Wpedantic -Werror>)
target_compile_options(${CMAKE_PROJECT_NAME} PRIVATE --use-port=emdawnwebgpu)
target_link_options(${CMAKE_PROJECT_NAME} PRIVATE --use-port=emdawnwebgpu)

function(compile_and_package_shader SHADER_NAME TARGET)
	add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/shaders/${SHADER_NAME}.wgsl 
		COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_CURRENT_BINARY_DIR}/shaders
		COMMAND slangc -target wgsl -matrix-layout-column-major ${CMAKE_CURRENT_SOURCE_DIR}/assets/shaders/${SHADER_NAME}.slang -o ${CMAKE_CURRENT_BINARY_DIR}/shaders/${SHADER_NAME}.wgsl
		DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/assets/shaders/${SHADER_NAME}.slang)
	add_custom_target(${TARGET}_shader_${SHADER_NAME} DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/shaders/${SHADER_NAME}.wgsl)
	#TODO: Add deptfile generation via slang for recompilation when embedded files change
	add_dependencies(${TARGET} ${TARGET}_shader_${SHADER_NAME})
	target_link_options(${TARGET} PRIVATE --embed-file ${CMAKE_CURRENT_BINARY_DIR}/shaders/${SHADER_NAME}.wgsl@/shaders/${SHADER_NAME}.wgsl)
endfunction()

compile_and_package_shader(shaders ${CMAKE_PROJECT_NAME})