cmake_minimum_required(VERSION 3.10.0)

# Set compilers before project() to ensure they're used
set(CMAKE_C_COMPILER /usr/bin/clang-21)
set(CMAKE_CXX_COMPILER /usr/bin/clang++-21)

project(aoc25 VERSION 0.1.0 LANGUAGES C CXX)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
# Helper to add AoC day targets and auto-copy any input files
function(aoc_add_day name src_dir)
	# remaining args are source files
	set(sources ${ARGN})

	add_executable(${name} ${sources})
	set_target_properties(${name} PROPERTIES CXX_STANDARD 23 CXX_STANDARD_REQUIRED ON)

	target_compile_options(${name} PRIVATE -stdlib=libc++)
    target_link_options(${name} PRIVATE -stdlib=libc++)

	# Gather common input files in the source directory
	file(GLOB INPUT_FILES
		"${src_dir}/*_input"
		"${src_dir}/puzzle_input"
		"${src_dir}/test_input"
	)

	foreach(f IN LISTS INPUT_FILES)
		get_filename_component(fname ${f} NAME)
		add_custom_command(TARGET ${name} POST_BUILD
			COMMAND ${CMAKE_COMMAND} -E copy ${f} $<TARGET_FILE_DIR:${name}>/${fname}
			COMMENT "Copying ${fname} to build directory for ${name}"
		)
	endforeach()
endfunction()

# Per-day subprojects (example: day1)
add_subdirectory(day1)
add_subdirectory(day2)
add_subdirectory(day3)
add_subdirectory(day4)
add_subdirectory(day5)
add_subdirectory(day6)
add_subdirectory(day7)