find_package(Doxygen REQUIRED)
find_package(Sphinx REQUIRED)

file(GLOB_RECURSE PERIPHERALS_HEADERS ${CMAKE_SOURCE_DIR}/Peripherals/Inc/*.hpp)

set(DOXYGEN_INPUT_DIR "${PROJECT_SOURCE_DIR}/Threads/Inc ${PROJECT_SOURCE_DIR}/Peripherals/Inc ${PROJECT_SOURCE_DIR}/Utility/Inc")
set(DOXYGEN_OUTPUT_DIR ${CMAKE_CURRENT_BINARY_DIR}/docs/doxygen)
set(DOXYGEN_INDEX_FILE ${CMAKE_CURRENT_SOURCE_DIR}/html/index.html)
set(DOXYFILE_IN ${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in)
set(DOXYFILE_OUT ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile)

#Replace variables inside @@ with the current values
configure_file(${DOXYFILE_IN} ${DOXYFILE_OUT} @ONLY)

file(MAKE_DIRECTORY ${DOXYGEN_OUTPUT_DIR}) #Doxygen won't create this for us
add_custom_command(OUTPUT ${DOXYGEN_INDEX_FILE}
        DEPENDS ${PERIPHERALS_HEADERS}
        COMMAND ${DOXYGEN_EXECUTABLE} ${DOXYFILE_OUT}
        MAIN_DEPENDENCY ${DOXYFILE_OUT} ${DOXYFILE_IN}
        COMMENT "Generating docs")

add_custom_target(Doxygen ALL DEPENDS ${DOXYGEN_INDEX_FILE})

set(SPHINX_SOURCE ${CMAKE_CURRENT_SOURCE_DIR})
set(SPHINX_BUILD ${CMAKE_CURRENT_BINARY_DIR}/docs/sphinx)
set(SPHINX_INDEX_FILE ${SPHINX_BUILD}/index.html)
set(SPHINX_SOURCE_LIST
        ${CMAKE_CURRENT_SOURCE_DIR}/index.rst
        ${CMAKE_CURRENT_SOURCE_DIR}/peripherals.rst
        ${CMAKE_CURRENT_SOURCE_DIR}/utility.rst
        ${CMAKE_CURRENT_SOURCE_DIR}/threads.rst
    )

add_custom_command(OUTPUT ${SPHINX_INDEX_FILE}
        COMMAND
            ${SPHINX_EXECUTABLE} -b html
            -Dbreathe_projects.SkullC=${DOXYGEN_OUTPUT_DIR}/xml
            ${SPHINX_SOURCE} ${SPHINX_BUILD}
        WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
        DEPENDS ${SPHINX_SOURCE_LIST} ${PERIPHERALS_HEADERS}
        MAIN_DEPENDENCY ${SPHINX_SOURCE}/conf.py
        COMMENT "Generating documentation with Sphinx")

add_custom_target(Sphinx ALL DEPENDS ${SPHINX_INDEX_FILE})