###############################################################################
### Create Doc Targets ###

message(STATUS "Create sphinx conf.py from conf.py.in")
configure_file(${CMAKE_SOURCE_DIR}/docs/conf.py.in
    ${CMAKE_BINARY_DIR}/docs/conf.py @ONLY)

message(STATUS "Copying doc to staging area")
file(COPY ${CMAKE_SOURCE_DIR}/docs/ DESTINATION ${CMAKE_BINARY_DIR}/docs)

message(STATUS "Copy extra doc files to staging area")
list(APPEND DOCFILES ${CMAKE_SOURCE_DIR}/README)
list(APPEND DOCFILES ${CMAKE_SOURCE_DIR}/INSTALL)
list(APPEND DOCFILES ${CMAKE_SOURCE_DIR}/ChangeLog)
list(APPEND DOCFILES ${CMAKE_SOURCE_DIR}/LICENSE)
list(APPEND DOCFILES ${CMAKE_SOURCE_DIR}/share/nuke/ocionuke/viewer.py)
CopyFiles(RSTDOC ${DOCFILES})

message(STATUS "Extracting .rst files from C++ headers")
ExtractRstCPP(${CMAKE_SOURCE_DIR}/export/OpenColorIO/OpenColorIO.h developers/api/OpenColorIO.rst)
ExtractRstCPP(${CMAKE_SOURCE_DIR}/export/OpenColorIO/OpenColorTransforms.h developers/api/OpenColorTransforms.rst)
ExtractRstCPP(${CMAKE_SOURCE_DIR}/export/OpenColorIO/OpenColorTypes.h developers/api/OpenColorTypes.rst)

add_custom_target(doc ALL
    COMMAND PYTHONPATH=${PYTHONPATH} sphinx-build -b html . ${CMAKE_CURRENT_BINARY_DIR}/build-html
    DEPENDS
        OpenColorIO
        PyOpenColorIO
        ${CMAKE_BINARY_DIR}/docs/conf.py
        developers/api/OpenColorIO.rst
        developers/api/OpenColorTransforms.rst
        developers/api/OpenColorTypes.rst
        ${RSTDOC_OUTPUT}
    COMMENT "Building html docs"
    SOURCES ${DOCFILES})

# note: ExternalProject will not build when added to a add_custom_target this
# works around this problem. This seems to be fixed in the cmake ^HEAD
add_dependencies(doc Sphinx) 

install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/build-html/
        DESTINATION ${CMAKE_INSTALL_PREFIX}/share/doc/OpenColorIO/html
        PATTERN .* EXCLUDE
)

find_package(LATEX)
if(PDFLATEX_COMPILER)
    
    add_custom_target(latex
        COMMAND PYTHONPATH=${PYTHONPATH} sphinx-build -b latex . ${CMAKE_CURRENT_BINARY_DIR}/build-latex
        DEPENDS
            OpenColorIO
            ${CMAKE_BINARY_DIR}/docs/conf.py
            developers/api/OpenColorIO.rst
            developers/api/OpenColorTransforms.rst
            developers/api/OpenColorTypes.rst
            ${RSTDOC_OUTPUT}
        COMMENT "Building latex doc"
        SOURCES ${DOCFILES})
    add_dependencies(latex Sphinx)
    
    add_custom_target(pdf ALL
        COMMAND ${PDFLATEX_COMPILER} OpenColorIO.tex
        WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/build-latex
        COMMENT "Building pdf doc"
        SOURCES ${DOCFILES})
    add_dependencies(pdf latex)
    
    install(FILES ${CMAKE_CURRENT_BINARY_DIR}/build-latex/OpenColorIO.pdf
            DESTINATION ${CMAKE_INSTALL_PREFIX}/share/doc/OpenColorIO/)
    
endif()