option (USE_INTERNAL_POCO_LIBRARY "Set to FALSE to use system poco library instead of bundled" ${NOT_UNBUNDLED})

if (NOT EXISTS "${ClickHouse_SOURCE_DIR}/contrib/poco/CMakeLists.txt")
   if (USE_INTERNAL_POCO_LIBRARY)
      message (WARNING "submodule contrib/poco is missing. to fix try run: \n git submodule update --init --recursive")
   endif ()
   set (USE_INTERNAL_POCO_LIBRARY 0)
   set (MISSING_INTERNAL_POCO_LIBRARY 1)
endif ()

set (POCO_COMPONENTS Net XML SQL Data)
if (NOT DEFINED ENABLE_POCO_NETSSL OR ENABLE_POCO_NETSSL)
    list (APPEND POCO_COMPONENTS Crypto NetSSL)
endif ()
if (NOT DEFINED ENABLE_POCO_MONGODB OR ENABLE_POCO_MONGODB)
    set(ENABLE_POCO_MONGODB 1 CACHE BOOL "")
    list (APPEND POCO_COMPONENTS MongoDB)
else ()
    set(ENABLE_POCO_MONGODB 0 CACHE BOOL "")
endif ()
# TODO: after new poco release with SQL library rename ENABLE_POCO_ODBC -> ENABLE_POCO_SQLODBC
if (NOT DEFINED ENABLE_POCO_ODBC OR ENABLE_POCO_ODBC)
    list (APPEND POCO_COMPONENTS DataODBC)
    list (APPEND POCO_COMPONENTS SQLODBC)
endif ()

if (NOT USE_INTERNAL_POCO_LIBRARY)
    find_package (Poco COMPONENTS ${POCO_COMPONENTS})
endif ()

if (Poco_INCLUDE_DIRS AND Poco_Foundation_LIBRARY)
elseif (NOT MISSING_INTERNAL_POCO_LIBRARY)
    set (USE_INTERNAL_POCO_LIBRARY 1)

    set (ENABLE_ZIP 0 CACHE BOOL "")
    set (ENABLE_PAGECOMPILER 0 CACHE BOOL "")
    set (ENABLE_PAGECOMPILER_FILE2PAGE 0 CACHE BOOL "")
    set (ENABLE_REDIS 0 CACHE BOOL "")
    set (ENABLE_DATA_SQLITE 0 CACHE BOOL "")
    set (ENABLE_DATA_MYSQL 0 CACHE BOOL "")
    set (ENABLE_DATA_POSTGRESQL 0 CACHE BOOL "")
    set (ENABLE_ENCODINGS 0 CACHE BOOL "")
    set (ENABLE_MONGODB ${ENABLE_POCO_MONGODB} CACHE BOOL "" FORCE)

    # new after 2.0.0:
    set (POCO_ENABLE_ZIP 0 CACHE BOOL "")
    set (POCO_ENABLE_PAGECOMPILER 0 CACHE BOOL "")
    set (POCO_ENABLE_PAGECOMPILER_FILE2PAGE 0 CACHE BOOL "")
    set (POCO_ENABLE_REDIS 0 CACHE BOOL "")
    set (POCO_ENABLE_SQL_SQLITE 0 CACHE BOOL "")
    set (POCO_ENABLE_SQL_MYSQL 0 CACHE BOOL "")
    set (POCO_ENABLE_SQL_POSTGRESQL 0 CACHE BOOL "")

    set (POCO_UNBUNDLED 1 CACHE BOOL "")
    set (POCO_UNBUNDLED_PCRE 0 CACHE BOOL "")
    set (POCO_UNBUNDLED_EXPAT 0 CACHE BOOL "")
    set (POCO_STATIC ${MAKE_STATIC_LIBRARIES} CACHE BOOL "")
    set (POCO_VERBOSE_MESSAGES 1 CACHE BOOL "")


    # used in internal compiler
    list (APPEND Poco_INCLUDE_DIRS
        "${ClickHouse_SOURCE_DIR}/contrib/poco/Foundation/include/"
        "${ClickHouse_SOURCE_DIR}/contrib/poco/Util/include/"
    )

    if (ENABLE_POCO_MONGODB)
        set (Poco_MongoDB_LIBRARY PocoMongoDB)
        set (Poco_MongoDB_INCLUDE_DIR "${ClickHouse_SOURCE_DIR}/contrib/poco/MongoDB/include/")
    endif ()

    if (EXISTS "${ClickHouse_SOURCE_DIR}/contrib/poco/SQL/ODBC/include/")
        set (Poco_SQL_FOUND 1)
        set (Poco_SQL_LIBRARY PocoSQL)
        set (Poco_SQL_INCLUDE_DIR
             "${ClickHouse_SOURCE_DIR}/contrib/poco/SQL/include"
             "${ClickHouse_SOURCE_DIR}/contrib/poco/Data/include"
             )
        if ((NOT DEFINED POCO_ENABLE_SQL_ODBC OR POCO_ENABLE_SQL_ODBC) AND ODBC_FOUND)
            set (Poco_SQLODBC_INCLUDE_DIR
                "${ClickHouse_SOURCE_DIR}/contrib/poco/SQL/ODBC/include/"
                "${ClickHouse_SOURCE_DIR}/contrib/poco/Data/ODBC/include/"
                ${ODBC_INCLUDE_DIRS}
                )
            set (Poco_SQLODBC_LIBRARY PocoSQLODBC ${ODBC_LIBRARIES} ${LTDL_LIBRARY})
        endif ()
    else ()
        set (Poco_Data_FOUND 1)
        set (Poco_Data_INCLUDE_DIR "${ClickHouse_SOURCE_DIR}/contrib/poco/Data/include")
        set (Poco_Data_LIBRARY PocoData)
        if ((NOT DEFINED ENABLE_DATA_ODBC OR ENABLE_DATA_ODBC) AND ODBC_FOUND)
            set (USE_POCO_DATAODBC 1)
            set (Poco_DataODBC_INCLUDE_DIR
                "${ClickHouse_SOURCE_DIR}/contrib/poco/Data/ODBC/include/"
                ${ODBC_INCLUDE_DIRS}
            )
            set (Poco_DataODBC_LIBRARY PocoDataODBC ${ODBC_LIBRARIES} ${LTDL_LIBRARY})
        endif ()
    endif ()

    if (OPENSSL_FOUND AND (NOT DEFINED ENABLE_POCO_NETSSL OR ENABLE_POCO_NETSSL))
        set (Poco_NetSSL_LIBRARY PocoNetSSL ${OPENSSL_LIBRARIES})
        set (Poco_Crypto_LIBRARY PocoCrypto ${OPENSSL_LIBRARIES})
    endif ()

    if (USE_STATIC_LIBRARIES AND USE_INTERNAL_ZLIB_LIBRARY)
        list (APPEND Poco_INCLUDE_DIRS
            "${ClickHouse_SOURCE_DIR}/contrib/${INTERNAL_ZLIB_NAME}/"
            "${ClickHouse_BINARY_DIR}/contrib/${INTERNAL_ZLIB_NAME}/"
        )
    endif ()

    set (Poco_Foundation_LIBRARY PocoFoundation)
    set (Poco_Util_LIBRARY PocoUtil)
    set (Poco_Net_LIBRARY PocoNet)
    set (Poco_XML_LIBRARY PocoXML)
endif ()

if (Poco_NetSSL_LIBRARY AND Poco_Crypto_LIBRARY)
    set (USE_POCO_NETSSL 1)
endif ()
if (Poco_MongoDB_LIBRARY)
    set (USE_POCO_MONGODB 1)
endif ()
if (Poco_DataODBC_LIBRARY AND ODBC_FOUND)
    set (USE_POCO_DATAODBC 1)
endif ()
if (Poco_SQLODBC_LIBRARY AND ODBC_FOUND)
    set (USE_POCO_SQLODBC 1)
endif ()

message(STATUS "Using Poco: ${Poco_INCLUDE_DIRS} : ${Poco_Foundation_LIBRARY},${Poco_Util_LIBRARY},${Poco_Net_LIBRARY},${Poco_NetSSL_LIBRARY},${Poco_Crypto_LIBRARY},${Poco_XML_LIBRARY},${Poco_Data_LIBRARY},${Poco_DataODBC_LIBRARY},${Poco_SQL_LIBRARY},${Poco_SQLODBC_LIBRARY},${Poco_MongoDB_LIBRARY}; MongoDB=${USE_POCO_MONGODB}, DataODBC=${USE_POCO_DATAODBC}, NetSSL=${USE_POCO_NETSSL}")

# How to make sutable poco:
# use branch:
#  develop  OR  poco-1.7.9-release + 6a49c94d18c654d7a20b8c8ea47071b1fdd4813b
# and merge:
# ClickHouse-Extras/clickhouse_unbundled
# ClickHouse-Extras/clickhouse_unbundled_zlib
# ClickHouse-Extras/clickhouse_task
# ClickHouse-Extras/clickhouse_misc
# ClickHouse-Extras/clickhouse_anl
# ClickHouse-Extras/clickhouse_http_header https://github.com/pocoproject/poco/pull/1574
# ClickHouse-Extras/clickhouse_socket
# ClickHouse-Extras/clickhouse_warning
# ClickHouse-Extras/clickhouse-purge-logs-on-no-space
# ClickHouse-Extras/clickhouse_freebsd
# ClickHouse-Extras/clikhouse_no_zlib
# ClickHouse-Extras/clickhouse-fix-atomic