# * try to find Poco libraries and include files POCO_INCLUDE_DIR where to find Standard.hxx, etc. POCO_LIBRARIES
#   libraries to link against POCO_FOUND If false, do not try to use POCO

find_path(POCO_INCLUDE_DIR Poco/Poco.h)

find_library(POCO_LIB_FOUNDATION NAMES PocoFoundation)
find_library(POCO_LIB_UTIL NAMES PocoUtil)
find_library(POCO_LIB_XML NAMES PocoXML)
find_library(POCO_LIB_NET NAMES PocoNet)
find_library(POCO_LIB_CRYPTO NAMES PocoCrypto)
find_library(POCO_LIB_NETSSL NAMES PocoNetSSL)

find_library(POCO_LIB_FOUNDATION_DEBUG NAMES PocoFoundationd)
find_library(POCO_LIB_UTIL_DEBUG NAMES PocoUtild)
find_library(POCO_LIB_XML_DEBUG NAMES PocoXMLd)
find_library(POCO_LIB_NET_DEBUG NAMES PocoNetd)
find_library(POCO_LIB_CRYPTO_DEBUG NAMES PocoCryptod)
find_library(POCO_LIB_NETSSL_DEBUG NAMES PocoNetSSLd)

function(add_poco_lib POCO_COMPONENT POCO_LIB_MODULE POCO_DEBUG_LIB_MODULE)
  # Add poco library to list
  set(POCO_LIBRARIES
      ${POCO_LIBRARIES} ${POCO_LIB_MODULE}
      PARENT_SCOPE
  )

  if(NOT TARGET Poco::${POCO_COMPONENT})
    add_library(Poco::${POCO_COMPONENT} UNKNOWN IMPORTED)
    set_target_properties(
      Poco::${POCO_COMPONENT} PROPERTIES INTERFACE_INCLUDE_DIRECTORIES ${POCO_INCLUDE_DIR} IMPORTED_LOCATION
                                                                                           ${POCO_LIB_MODULE}
    )
  endif()

endfunction(add_poco_lib)

add_poco_lib(Foundation ${POCO_LIB_FOUNDATION} ${POCO_LIB_FOUNDATION_DEBUG})
add_poco_lib(Util ${POCO_LIB_UTIL} ${POCO_LIB_UTIL_DEBUG})
add_poco_lib(XML ${POCO_LIB_XML} ${POCO_LIB_XML_DEBUG})
add_poco_lib(Net ${POCO_LIB_NET} ${POCO_LIB_NET_DEBUG})
add_poco_lib(Crypto ${POCO_LIB_CRYPTO} ${POCO_LIB_CRYPTO_DEBUG})
add_poco_lib(NetSSL ${POCO_LIB_NETSSL} ${POCO_LIB_NETSSL_DEBUG})

# Set a version string by examining either the Poco/Version.h header or the Poco/Foundation.h header if Version.h does
# not exist
if(POCO_INCLUDE_DIR)
  if(EXISTS ${POCO_INCLUDE_DIR}/Poco/Version.h)
    set(VERSION_FILE ${POCO_INCLUDE_DIR}/Poco/Version.h)
  else()
    set(VERSION_FILE ${POCO_INCLUDE_DIR}/Poco/Foundation.h)
  endif()
  # regex quantifiers like {8} don't seem to work so we'll stick with + even though it's not strictly true
  set(VERS_REGEX "^#define[ \t]+POCO_VERSION[ \t]+0x([0-9A-F]+)$")
  file(STRINGS ${VERSION_FILE} POCO_VERSION REGEX ${VERS_REGEX})
  # pull out just the part after the 0x
  string(REGEX REPLACE ${VERS_REGEX} "\\1" POCO_VERSION ${POCO_VERSION})

  # Pretty format
  string(SUBSTRING ${POCO_VERSION} 0 2 POCO_VERSION_MAJOR)
  math(EXPR POCO_VERSION_MAJOR "0x${POCO_VERSION_MAJOR}" OUTPUT_FORMAT DECIMAL)
  string(REGEX REPLACE "^0\(.\)" "\\1" POCO_VERSION_MAJOR ${POCO_VERSION_MAJOR})
  string(SUBSTRING ${POCO_VERSION} 2 2 POCO_VERSION_MINOR)
  math(EXPR POCO_VERSION_MINOR "0x${POCO_VERSION_MINOR}" OUTPUT_FORMAT DECIMAL)
  string(REGEX REPLACE "^0\(.\)" "\\1" POCO_VERSION_MINOR ${POCO_VERSION_MINOR})
  string(SUBSTRING ${POCO_VERSION} 4 2 POCO_VERSION_PATCH)
  math(EXPR POCO_VERSION_PATCH "0x${POCO_VERSION_PATCH}" OUTPUT_FORMAT DECIMAL)
  string(REGEX REPLACE "^0\(.\)" "\\1" POCO_VERSION_PATCH ${POCO_VERSION_PATCH})
  set(POCO_VERSION "${POCO_VERSION_MAJOR}.${POCO_VERSION_MINOR}.${POCO_VERSION_PATCH}")
endif()

# Also set a shared library version number. This is different to the main version number and can form part of the
# package name on some Linux systems
if(POCO_LIB_FOUNDATION)
  set(POCO_SOLIB_VERSION "")
  # The library path is usually a symlink to the actually library
  get_filename_component(POCO_REAL_LIB_FOUNDATION ${POCO_LIB_FOUNDATION} REALPATH)
  set(_LIB_REGEX "^.*.so.([0-9]+)$")
  string(REGEX REPLACE ${_LIB_REGEX} "\\1" POCO_SOLIB_VERSION ${POCO_REAL_LIB_FOUNDATION})
endif()

# handle the QUIETLY and REQUIRED arguments and set POCO_FOUND to TRUE if all listed variables are TRUE
include(FindPackageHandleStandardArgs)
if(POCO_VERSION)
  find_package_handle_standard_args(
    Poco
    REQUIRED_VARS POCO_LIBRARIES POCO_INCLUDE_DIR
    VERSION_VAR POCO_VERSION
  )
else()
  message(status "Failed to determine Poco version: Ignoring requirement")
  find_package_handle_standard_args(Poco DEFAULT_MSG POCO_LIBRARIES POCO_INCLUDE_DIR)
endif()

mark_as_advanced(
  POCO_INCLUDE_DIR
  POCO_LIB_FOUNDATION
  POCO_LIB_FOUNDATION_DEBUG
  POCO_LIB_XML
  POCO_LIB_XML_DEBUG
  POCO_LIB_UTIL
  POCO_LIB_UTIL_DEBUG
  POCO_LIB_NET
  POCO_LIB_NET_DEBUG
  POCO_LIB_CRYPTO
  POCO_LIB_CRYPTO_DEBUG
  POCO_LIB_NETSSL
  POCO_LIB_NETSSL_DEBUG
)