# Needs CMake 3.28 for module
cmake_minimum_required(VERSION 3.28)
message(STATUS "Create project")
project(ffmpegraph CXX)
set(CMAKE_CXX_STANDARD 26)


# Use mold as the default linker, if it exists.
if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
    find_program(MOLD_LINKER "mold")
    if (MOLD_LINKER)
        add_link_options(-fuse-ld=mold)
        message(STATUS "Setting linker to mold")
    endif()
endif()

include(FetchContent)
message(STATUS "Fetching raylib")
FetchContent_Declare(raylib
    GIT_REPOSITORY https://github.com/raysan5/raylib
    GIT_TAG 5.0
    SOURCE_DIR "${CMAKE_CURRENT_BINARY_DIR}/libs/raylib"
)
FetchContent_MakeAvailable(raylib)

message(STATUS "Fetching clopts")
FetchContent_Declare(clopts
        GIT_REPOSITORY https://github.com/Sirraide/clopts.git
        GIT_TAG master
        SOURCE_DIR "${CMAKE_CURRENT_BINARY_DIR}/libs/clopts"
)
FetchContent_MakeAvailable(clopts)

FetchContent_Declare(json
        URL https://github.com/nlohmann/json/releases/download/v3.11.3/json.tar.xz
        SOURCE_DIR "${CMAKE_CURRENT_BINARY_DIR}/libs/json"
)
FetchContent_MakeAvailable(json)

message(STATUS "Looking for files")
file(GLOB_RECURSE modules src/*.cppm)
file(GLOB_RECURSE headers src/*.hpp)
file(GLOB_RECURSE impls   src/*.cpp)

message(STATUS "Create target")
add_executable(ffmpegraph ${impls})
target_sources(ffmpegraph PUBLIC
    FILE_SET CXX_MODULES FILES ${modules}
    FILE_SET HEADERS     FILES ${headers}
)

target_compile_options(ffmpegraph PRIVATE
        -Wall -Wextra # Standard screaming
        -Wconversion -Wsign-conversion # Scream about accidentally converting stuff
        -Werror=return-type # Scream extra hard at not returning when you should.
        # Target detection black magic
        $<$<CONFIG:DEBUG>:-O0 -g3 -glldb>
        $<$<CONFIG:RELEASE>:-O3 -march=native>
)

if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
    target_compile_options(ffmpegraph PRIVATE -fdiagnostics-color=always)
elseif (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
    target_compile_options(ffmpegraph PRIVATE -fcolor-diagnostics)
endif()

target_link_libraries(ffmpegraph PRIVATE raylib m nlohmann_json::nlohmann_json)
target_include_directories(ffmpegraph PRIVATE "${CMAKE_CURRENT_BINARY_DIR}/libs/clopts/include")