include(FindLATEX)
option(DOCS "Build The Documentation")

find_package(Doxygen)
find_package(LATEX COMPONENTS PDFLATEX REQUIRED)


if(DOXYGEN_FOUND)
    set(DOXYGEN_IN ${CMAKE_CURRENT_SOURCE_DIR}/../docs/Doxyfile.in)
    set(DOXYGEN_OUT ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile)

    configure_file(${DOXYGEN_IN} ${DOXYGEN_OUT} @ONLY)
    message("Doxygen build started")

    # Note the option ALL which allows to build the docs together with the application
    add_custom_target(doc_doxygen ALL
        COMMAND ${DOXYGEN_EXECUTABLE} ${DOXYGEN_OUT}
        WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
        COMMENT "Generating API documentation with Doxygen"
        VERBATIM )
    if(LATEX_PDFLATEX_FOUND)
        
        if(UNIX)
            set(MAKE_COMMAND "make")
        elseif(WIN32)
            set(MAKE_COMMAND "make.bat")
        endif()

        message("PDFLATEX Found: ${PDFLATEX_COMPILER}")
        file(MAKE_DIRECTORY ${PROJECT_SOURCE_DIR}/bin/docs)
        set(PDF_OUTPUT_DIR "${PROJECT_SOURCE_DIR}/bin/docs")
        add_custom_target(
            build_docs_pdf ALL
            
            COMMAND ${MAKE_COMMAND}
            WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}/build/docs/latex"
            COMMENT "Building PDF Documentation..."
            VERBATIM
        )
        add_custom_command(
            TARGET build_docs_pdf POST_BUILD
            COMMAND ${CMAKE_COMMAND} -E copy_if_different
                    "${PROJECT_SOURCE_DIR}/build/docs/latex/refman.pdf"
                    "${PDF_OUTPUT_DIR}/Contarius.pdf"
            COMMENT "Copying PDF documentation to ${PDF_OUTPUT_DIR}..."
        )
    else()
        message(FATAL_ERROR "pdflatex not found. LaTeX is required to build the documentation.")
    endif()
else (DOXYGEN_FOUND)
    message("Doxygen needs to be installed to generate the Doxygen documentation")
endif (DOXYGEN_FOUND)