cmake_minimum_required(VERSION 3.19)

set(AQUAMARINE_VERSION "0.1.0")
add_compile_definitions(AQUAMARINE_VERSION="${AQUAMARINE_VERSION}")

project(aquamarine
    VERSION ${AQUAMARINE_VERSION}
    DESCRIPTION "A very light linux rendering backend library"
)

include(CTest)
include(CheckIncludeFile)
include(GNUInstallDirs)

set(PREFIX ${CMAKE_INSTALL_PREFIX})
set(INCLUDE ${CMAKE_INSTALL_FULL_INCLUDEDIR})
set(LIBDIR ${CMAKE_INSTALL_FULL_LIBDIR})

find_package(PkgConfig REQUIRED)
find_package(OpenGL REQUIRED COMPONENTS "GLES2")
find_package(hyprwayland-scanner 0.4.0 REQUIRED)
pkg_check_modules(deps REQUIRED IMPORTED_TARGET
    libseat>=0.8.0 libinput>=1.26.0
    wayland-client wayland-protocols
    hyprutils>=0.1.5
    pixman-1
    libdrm gbm libudev
    libdisplay-info hwdata
)

configure_file(aquamarine.pc.in aquamarine.pc @ONLY)

set(CMAKE_CXX_STANDARD 23)

if(CMAKE_BUILD_TYPE MATCHES Debug OR CMAKE_BUILD_TYPE MATCHES DEBUG)
    message(STATUS "Configuring aquamarine in Debug")
    add_compile_definitions(AQUAMARINE_DEBUG)
else()
    add_compile_options(-O3)
    message(STATUS "Configuring aquamarine in Release")
endif()

file(GLOB_RECURSE SRCFILES CONFIGURE_DEPENDS "src/*.cpp" "include/*.hpp")
file(GLOB_RECURSE PUBLIC_HEADERS CONFIGURE_DEPENDS "include/*.hpp")

add_library(aquamarine SHARED ${SRCFILES})
target_include_directories( aquamarine
    PUBLIC "./include"
    PRIVATE "./src" "./src/include" "./protocols" "${CMAKE_BINARY_DIR}"
)
set_target_properties(aquamarine PROPERTIES
    VERSION ${AQUAMARINE_VERSION}
    SOVERSION 0
)
target_link_libraries(aquamarine
    OpenGL::EGL
    OpenGL::GL
    PkgConfig::deps
)

check_include_file("sys/timerfd.h" HAS_TIMERFD)
pkg_check_modules(epoll IMPORTED_TARGET epoll-shim)
if(NOT HAS_TIMERFD AND epoll_FOUND)
    target_link_libraries(aquamarine PkgConfig::epoll)
endif()

# Protocols
pkg_get_variable(WAYLAND_PROTOCOLS_DIR wayland-protocols pkgdatadir)
message(STATUS "Found wayland-protocols at ${WAYLAND_PROTOCOLS_DIR}")
pkg_get_variable(WAYLAND_CLIENT_DIR wayland-client pkgdatadir)
message(STATUS "Found wayland-client at ${WAYLAND_CLIENT_DIR}")

function(protocolNew protoPath protoName external)
    if (external)
        set(path ${CMAKE_SOURCE_DIR}/${protoPath})
    else()
        set(path ${WAYLAND_PROTOCOLS_DIR}/${protoPath})
    endif()
    add_custom_command(
        OUTPUT ${CMAKE_SOURCE_DIR}/protocols/${protoName}.cpp
               ${CMAKE_SOURCE_DIR}/protocols/${protoName}.hpp
        COMMAND hyprwayland-scanner --client ${path}/${protoName}.xml ${CMAKE_SOURCE_DIR}/protocols/
        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
    )
    target_sources(aquamarine PRIVATE protocols/${protoName}.cpp protocols/${protoName}.hpp)
endfunction()
function(protocolWayland)
    add_custom_command(
        OUTPUT ${CMAKE_SOURCE_DIR}/protocols/wayland.cpp
               ${CMAKE_SOURCE_DIR}/protocols/wayland.hpp
        COMMAND hyprwayland-scanner --wayland-enums --client ${WAYLAND_CLIENT_DIR}/wayland.xml ${CMAKE_SOURCE_DIR}/protocols/
        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
    )
    target_sources(aquamarine PRIVATE protocols/wayland.cpp protocols/wayland.hpp)
endfunction()

protocolWayland()

protocolNew("stable/xdg-shell" "xdg-shell" false)
protocolNew("stable/linux-dmabuf" "linux-dmabuf-v1" false)

# Generate hwdata info
pkg_get_variable(HWDATA_DIR hwdata pkgdatadir)
message(STATUS "Running ${CMAKE_SOURCE_DIR}/data/hwdata.sh < ${HWDATA_DIR}/pnp.ids")
execute_process(
    COMMAND /bin/sh -c "${CMAKE_SOURCE_DIR}/data/hwdata.sh < ${HWDATA_DIR}/pnp.ids"
    RESULT_VARIABLE HWDATA_PNP_RESULT
    OUTPUT_VARIABLE HWDATA_PNP_IDS
    ENCODING UTF8
)

if (NOT HWDATA_PNP_RESULT MATCHES 0)
    message(WARNING "hwdata gathering pnps failed")
endif()

configure_file(data/hwdata.hpp.in hwdata.hpp @ONLY)

# tests
add_custom_target(tests)

add_executable(simpleWindow "tests/SimpleWindow.cpp")
target_link_libraries(simpleWindow PRIVATE PkgConfig::deps aquamarine)
add_test(NAME "simpleWindow" WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/tests COMMAND simpleWindow "simpleWindow")
add_dependencies(tests simpleWindow)

# Installation
install(TARGETS aquamarine)
install(DIRECTORY "include/aquamarine" DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
install(FILES ${CMAKE_BINARY_DIR}/aquamarine.pc DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)