list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}")
find_package(Sphinx)

if(NOT Sphinx_FOUND)
    return()
endif()
set(SPHINX_SOURCE ${CMAKE_CURRENT_SOURCE_DIR})
set(TUTORIAL_SPHINX_BUILD
    "${CMAKE_CURRENT_SOURCE_DIR}/../openxr-tutorial"
    CACHE PATH "Set the location of the HTML build."
)
set(TUTORIAL_BASE_URL
    "https:////openxr-tutorial.simul.co/"
    CACHE PATH "Base URL of the site to be built."
)

file(GLOB_RECURSE RST_FILES "*.rst")
file(GLOB_RECURSE MD_FILES "*.md")
file(GLOB HTM_FILES "*.html")

file(GLOB_RECURSE THEME_FILES "tutorial_sphinx_theme_1/*.html")

file(GLOB_RECURSE CSS_FILES "tutorial_sphinx_theme_1/*.css")

source_group("Theme" FILES ${THEME_FILES})

function(SiteVariant Platform Api)
    set(targetname "variant_${Platform}_${Api}")
    add_custom_target(
        ${targetname} ALL
        COMMAND
            "${SPHINX_EXECUTABLE}" -a -c "${CMAKE_CURRENT_SOURCE_DIR}" -b html
            "${SPHINX_SOURCE}" ${TUTORIAL_SPHINX_BUILD}/${Platform}/${Api} -D
            html_baseurl=${TUTORIAL_BASE_URL} -t ${Platform} -t ${Api} -t
            OPENXR_SUBSITE
        WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}"
        DEPENDS
            # Other docs files you want to track should go here (or in some variable)
            index.rst
            ${DOXYGEN_INDEX_FILE}
            conf.py
            tutorial_sphinx_theme_1/static/css/theme.css
            ${SPHINX_SOURCE}/conf.py
        COMMENT
            "Generating documentation with Sphinx\n\"${SPHINX_EXECUTABLE}\" -a -c \"${CMAKE_CURRENT_SOURCE_DIR}\" -b html
            \"${SPHINX_SOURCE}\" ${TUTORIAL_SPHINX_BUILD}/${Platform}/${Api} -D html_baseurl=${TUTORIAL_BASE_URL}
            -t ${Platform} -t ${Api} -t OPENXR_SUBSITE "
        SOURCES
            ${RST_FILES}
            ${MD_FILES}
            ${THEME_FILES}
            ${CSS_FILES}
            ${HTM_FILES}
            conf.py
    )
    set_target_properties(${targetname} PROPERTIES FOLDER Docs)
endfunction()

sitevariant(windows vulkan)
sitevariant(windows opengl)
sitevariant(windows d3d11)
sitevariant(windows d3d12)
sitevariant(linux vulkan)
sitevariant(linux opengl)
sitevariant(android vulkan)
sitevariant(android opengles)

add_custom_target(
    MainSite ALL
    COMMAND
        "${SPHINX_EXECUTABLE}" -c "${CMAKE_CURRENT_SOURCE_DIR}" -b html
        "${SPHINX_SOURCE}" ${TUTORIAL_SPHINX_BUILD} index.rst -D
        html_baseurl=${TUTORIAL_BASE_URL} -D html_extra_path=.htaccess -t
        OPENXR_MAINSITE
    WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}"
    DEPENDS
        # Other docs files you want to track should go here (or in some variable)
        index.rst
        ${DOXYGEN_INDEX_FILE}
        conf.py
        tutorial_sphinx_theme_1/static/css/theme.css
        ${SPHINX_SOURCE}/conf.py
    COMMENT
        "Generating documentation with Sphinx\n\"${SPHINX_EXECUTABLE}\" -c \"${CMAKE_CURRENT_SOURCE_DIR}\" -b html
        \"${SPHINX_SOURCE}\" ${TUTORIAL_SPHINX_BUILD} index.rst -D html_baseurl=${TUTORIAL_BASE_URL} -t OPENXR_MAINSITE"
    SOURCES
        index.rst
        ${MD_FILES}
        ${THEME_FILES}
        ${CSS_FILES}
        ${HTM_FILES}
        conf.py
)
set_target_properties(MainSite PROPERTIES FOLDER Docs)

# see https://validator.github.io/validator/
find_program(
    TUTORIAL_VALIDATOR_EXECUTABLE
    NAMES vnu vnu.bat
    PATHS "C:/Program Files/vnu-runtime-image/bin/"
)

if(TUTORIAL_VALIDATOR_EXECUTABLE)
    add_custom_target(
        Validator ALL
        COMMAND
            ${TUTORIAL_VALIDATOR_EXECUTABLE} --format gnu --asciiquotes
            --skip-non-html ${TUTORIAL_SPHINX_BUILD}
        WORKING_DIRECTORY ${TUTORIAL_SPHINX_BUILD}
        COMMENT "Validating documentation nu validator"
        SOURCES ${ALL_HTML_FILES}
    )
    set_target_properties(Validator PROPERTIES FOLDER Docs)
endif()