## 3rd party code:

# Macro needed to list all sub-directory of a directory.
# There is no function in cmake as far as I know.
# Found at: http://stackoverflow.com/a/7788165
MACRO(SUBDIRLIST result curdir)
    FILE(GLOB children RELATIVE ${curdir} ${curdir}/*)
    SET(dirlist "")
    FOREACH(child ${children})
        IF(IS_DIRECTORY ${curdir}/${child})
            STRING(REPLACE "/" "" child ${child})
            LIST(APPEND dirlist ${child})
        ENDIF()
    ENDFOREACH()
    SET(${result} ${dirlist})
ENDMACRO()


## Translation tools:

SET(CURA_BINARY_DATA_DIRECTORY CACHE PATH "Directory to the cura-binary-data repository")

if(NOT CURA_BINARY_DATA_DIRECTORY AND NOT DEFINED $ENV{CURA_BINARY_DATA_DIRECTORY})
    message(STATUS "Using CURA_BINARY_DATA_DIRECTORY from set of environment variables...")
    SET(CURA_BINARY_DATA_DIRECTORY $ENV{CURA_BINARY_DATA_DIRECTORY})
endif()

# Dynamically creates targets for each language to create a *.po-file
MACRO(TARGETS_FOR_PO_FILES language)
    if(DEFINED GETTEXT_MSGINIT_EXECUTABLE)
        message(STATUS "Creating target i18n-create-po-${language}")
        add_custom_target(i18n-create-po-${language})
        add_dependencies(i18n-create-po i18n-create-po-${language})
    endif()
    message(STATUS "Creating target i18n-update-po-${language}")
    add_custom_target(i18n-update-po-${language})
    add_dependencies(i18n-update-po i18n-update-po-${language})
    foreach(pot_file ${pot_files})
        string(REGEX REPLACE ".*/(.*).pot" "${CMAKE_SOURCE_DIR}/resources/i18n/${language}/\\1.po" po_file ${pot_file})
        if(DEFINED GETTEXT_MSGINIT_EXECUTABLE)
            add_custom_command(TARGET i18n-create-po-${language} POST_BUILD
                               COMMAND ${GETTEXT_MSGINIT_EXECUTABLE} ARGS --no-wrap --no-translator -l ${language} -i ${pot_file} -o ${po_file})
        endif()
        add_custom_command(TARGET i18n-update-po-${language} POST_BUILD
                           COMMAND ${GETTEXT_MSGMERGE_EXECUTABLE} ARGS --no-wrap --no-fuzzy-matching -o ${po_file} ${po_file} ${pot_file})
    endforeach()
ENDMACRO()

# Dynamically creates targets for each language to create a *.mo-file
MACRO(TARGETS_FOR_MO_FILES language)
    message(STATUS "Creating target i18n-create-mo-${language}")
    add_custom_target(i18n-create-mo-${language})
    add_dependencies(i18n-create-mo i18n-create-mo-${language})
    if(TARGET i18n-copy-mo)
        message(STATUS "Creating target i18n-copy-mo-${language}")
        add_custom_target(i18n-copy-mo-${language})
        add_dependencies(i18n-copy-mo i18n-copy-mo-${language})
    endif()
    file(GLOB po_files ${CMAKE_SOURCE_DIR}/resources/i18n/${language}/*.po)
    foreach(po_file ${po_files})
        string(REGEX REPLACE ".*/(.*).po" "${CMAKE_BINARY_DIR}/resources/i18n/${language}/LC_MESSAGES/\\1.mo" mo_file ${po_file})
        add_custom_command(TARGET i18n-create-mo-${language} POST_BUILD
                           COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_BINARY_DIR}/resources/i18n/${language}/LC_MESSAGES/
                           COMMAND ${GETTEXT_MSGFMT_EXECUTABLE} ARGS ${po_file} -o ${mo_file} -f)
        if(TARGET i18n-copy-mo-${language})
             string(REGEX REPLACE ".*/(.*).po" "${CURA_BINARY_DATA_DIRECTORY}/${PROJECT_NAME}/resources/i18n/${language}/LC_MESSAGES/\\1.mo" mo_file_binary_copy ${po_file})
             add_custom_command(TARGET i18n-copy-mo-${language} POST_BUILD
                                COMMAND ${CMAKE_COMMAND} -E make_directory ${CURA_BINARY_DATA_DIRECTORY}/resources/i18n/${language}/LC_MESSAGES/
                                COMMAND ${CMAKE_COMMAND} -E copy ${mo_file} ${mo_file_binary_copy})
             add_dependencies(i18n-copy-mo-${language} i18n-create-mo-${language})
        endif()
    endforeach()
ENDMACRO()

# Checks for availability of gettext and when found creates all targets 
# TODO: Adding option to set the PROJECT_NAME externally!
MACRO(CREATE_TRANSLATION_TARGETS)
find_package(Gettext)

if(GETTEXT_FOUND)
    # translations target will convert .po files into .mo and .qm as needed.
    # The files are checked for a _qt suffix and if it is found, converted to
    # qm, otherwise they are converted to .po.
    if(DEFINED GETTEXT_MSGINIT_EXECUTABLE)
        message(STATUS "Creating target i18n-create-po")
        add_custom_target(i18n-create-po)
    else()
        message(WARNING "GETTEXT_MSGINIT_EXECUTABLE is undefined!\nSkipping to create i18n-create-po* targets...")
    endif()
    if(CURA_BINARY_DATA_DIRECTORY)
        if(EXISTS ${CURA_BINARY_DATA_DIRECTORY})
            message(STATUS "CURA_BINARY_DATA_DIRECTORY: ${CURA_BINARY_DATA_DIRECTORY}")
            message(STATUS "Creating target i18n-copy-mo")
            add_custom_target(i18n-copy-mo)
        else()
            message(WARNING "CURA_BINARY_DATA_DIRECTORY does not exist! (${CURA_BINARY_DATA_DIRECTORY})")
        endif()
    else()
        message(WARNING "CURA_BINARY_DATA_DIRECTORY is not set!")
    endif()
    message(STATUS "Creating target i18n-update-po")
    add_custom_target(i18n-update-po)
    message(STATUS "Creating target i18n-create-mo")
    add_custom_target(i18n-create-mo ALL)

    SUBDIRLIST(languages ${CMAKE_SOURCE_DIR}/resources/i18n/)
    file(GLOB pot_files ${CMAKE_SOURCE_DIR}/resources/i18n/*.pot)
    foreach(language ${languages})
        TARGETS_FOR_PO_FILES(${language})
        TARGETS_FOR_MO_FILES(${language})
    endforeach()
    install(DIRECTORY ${CMAKE_BINARY_DIR}/resources DESTINATION ${CMAKE_INSTALL_DATADIR}/${PROJECT_NAME}/)
endif()
ENDMACRO()