option (ENABLE_AZURE_BLOB_STORAGE "Enable Azure blob storage" ${ENABLE_LIBRARIES})

option(USE_INTERNAL_AZURE_BLOB_STORAGE_LIBRARY
    "Set to FALSE to use system Azure SDK instead of bundled (OFF currently not implemented)"
    ON)

if (ENABLE_AZURE_BLOB_STORAGE)
    set(USE_AZURE_BLOB_STORAGE 1)
    set(AZURE_BLOB_STORAGE_LIBRARY azure_sdk)
endif()

if ((NOT EXISTS "${ClickHouse_SOURCE_DIR}/contrib/azure/sdk"
        OR NOT EXISTS "${ClickHouse_SOURCE_DIR}/contrib/azure/cmake-modules")
        AND USE_INTERNAL_AZURE_BLOB_STORAGE_LIBRARY)
    message (WARNING "submodule contrib/azure is missing. to fix try run: \n git submodule update --init")
    set(USE_INTERNAL_AZURE_BLOB_STORAGE_LIBRARY OFF)
    set(USE_AZURE_BLOB_STORAGE 0)
endif ()

if (NOT USE_INTERNAL_SSL_LIBRARY AND USE_INTERNAL_AZURE_BLOB_STORAGE_LIBRARY)
    message (FATAL_ERROR "Currently Blob Storage support can be built only with internal SSL library")
endif()

if (NOT USE_INTERNAL_CURL AND USE_INTERNAL_AZURE_BLOB_STORAGE_LIBRARY)
    message (FATAL_ERROR "Currently Blob Storage support can be built only with internal curl library")
endif()

if (USE_AZURE_BLOB_STORAGE)
    message (STATUS "Using Azure Blob Storage - ${USE_AZURE_BLOB_STORAGE}")
endif()