cmake_minimum_required(VERSION 3.23)
project(meowcraft)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)

# Enable assertions for RelWithDebInfo builds.
string(REPLACE "-DNDEBUG" "" CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO}")

if (NOT UNIX)
    set(GLEW_USE_STATIC_LIBS ON)
endif (NOT UNIX)

find_package(glfw3 3.3 REQUIRED)
find_package(GLEW REQUIRED)
find_package(OpenGL REQUIRED)

# Vendored shared libraries for MinGW-w64
# for cross-compiling to Windows from macOS
if (WIN32)
    set_target_properties(glfw PROPERTIES
        IMPORTED_IMPLIB_RELEASE "${CMAKE_SOURCE_DIR}/vendor/mingw/libglfw3.a"
    )

    set_target_properties(GLEW::glew_s PROPERTIES
        IMPORTED_LOCATION_RELEASE "${CMAKE_SOURCE_DIR}/vendor/mingw/libglew32.a"
        INTERFACE_LINK_LIBRARIES "" # Tries importing OpenGL.framework on macOS otherwise
    )
endif (WIN32)

add_executable(meowcraft
    src/main.cpp
    src/Defines.hpp
    src/Game.cpp src/Game.hpp
    src/Render.cpp src/Render.hpp
    src/Common/Sizes.hpp
    src/GFX/Window.cpp src/GFX/Window.hpp
    src/GFX/Mesh.cpp src/GFX/Mesh.hpp
    src/Math/Vector.hpp
    src/Math/Common.hpp
    src/GFX/Shading/Shader.cpp src/GFX/Shading/Shader.hpp
    src/GFX/Shading/Program.cpp src/GFX/Shading/Program.hpp
    src/Math/Matrix.hpp
    src/Math/MVP.hpp
    src/GFX/Camera.cpp src/GFX/Camera.hpp
    src/Math/Rotation.hpp
    src/GFX/Shading/Uniform.cpp src/GFX/Shading/Uniform.hpp
    src/GFX/Texture.cpp src/GFX/Texture.hpp
    src/Assets.cpp src/Assets.hpp
    src/GFX/Image/RawImage.cpp src/GFX/Image/RawImage.hpp
    src/GFX/Image/PPMParser.cpp src/GFX/Image/PPMParser.hpp
    src/World/Chunk.cpp src/World/Chunk.hpp
    src/World/BlockType.hpp
    src/World/Generation/Generator.cpp src/World/Generation/Generator.hpp
    src/World/BlockSide.hpp
    src/World/World.cpp src/World/World.hpp
    src/World/ChunkIndex.hpp
    src/Util/ImageViewer.cpp src/Util/ImageViewer.hpp
    src/Math/Interpolation.cpp
    src/Math/Grid.cpp
    src/Math/Perlin.cpp
    src/Compute/Queue.hpp
    src/Math/Constants.hpp
    src/World/Generation/ChunkMeshing.cpp src/World/Generation/ChunkMeshing.hpp
    src/Math/Tensor.hpp
    src/World/Generation/Decoration.cpp src/World/Generation/Decoration.hpp
    src/Math/Random.cpp src/Math/Random.hpp
    src/World/Clouds.cpp src/World/Clouds.hpp
    src/GFX/Util/MeshBuilder.hpp
    src/GFX/Util/Primitives.cpp src/GFX/Util/Primitives.hpp
    src/Math/AABB.cpp src/Math/AABB.hpp
    src/Time.cpp src/Time.hpp
    src/World/Generation/Lighting.cpp src/World/Generation/Lighting.hpp
    src/World/Generation/ChunkNeighbors.hpp src/World/Generation/ChunkNeighbors.cpp
    src/World/ChunkRegistry.cpp src/World/ChunkRegistry.hpp
    src/World/Position.hpp
    src/World/ChunkDimensions.hpp
    src/Transform.cpp src/Transform.hpp
    src/Entities/Player.cpp src/Entities/Player.hpp
    src/Common/FlexArray.hpp
    src/Math/Ray.hpp
    src/Common/Lambda.hpp
    src/Math/Functions.hpp
    src/Common/Casts.hpp
    src/World/VoxelTraversal.hpp
    src/Common/Assert.hpp
    src/Common/Pure.hpp
    src/GFX/Actions.hpp
    src/GFX/Resources.cpp src/GFX/Resources.hpp
    src/ThreadRole.hpp
    src/Input.cpp src/Input.hpp
)

if (WIN32)
    set(LINK_FLAGS "-static-libgcc -static-libstdc++ -static -mwindows")
endif (WIN32)

target_link_libraries(meowcraft PRIVATE glfw GLEW::GLEW OpenGL::GL ${LINK_FLAGS})

function(make_includable input_file output_file)
    file(READ ${input_file} content)
    set(delim "meowcraft_asset")
    set(content "R\"${delim}(${content})${delim}\"")
    file(WRITE ${output_file} "${content}")
endfunction(make_includable)

function(make_assets)
    foreach(file ${ARGN})
        make_includable(assets/${file} assets/generated/${file}.include)
    endforeach()
endfunction(make_assets)

make_assets(images/atlas.ppm
    shaders/terrain.frag.glsl shaders/terrain.vert.glsl
    shaders/clouds.frag.glsl shaders/clouds.vert.glsl
    shaders/image_viewer.frag.glsl shaders/image_viewer.vert.glsl
    shaders/block_outline.frag.glsl shaders/block_outline.vert.glsl
)