if(NOT CPackComponentsDEB_SOURCE_DIR)
  message(FATAL_ERROR "CPackComponentsDEB_SOURCE_DIR not set")
endif()

include(${CPackComponentsDEB_SOURCE_DIR}/RunCPackVerifyResult.cmake)


# expected results
set(expected_file_mask "${CPackComponentsDEB_BINARY_DIR}/mylib-*_1.0.3_*.deb")
set(expected_count 3)


set(actual_output)
run_cpack(actual_output
          CPack_output
          CPack_error
          EXPECTED_FILE_MASK "${expected_file_mask}"
          CONFIG_ARGS ${config_args}
          CONFIG_VERBOSE ${config_verbose})


if(NOT actual_output)
  message(STATUS "expected_count='${expected_count}'")
  message(STATUS "expected_file_mask='${expected_file_mask}'")
  message(STATUS "actual_output_files='${actual_output}'")
  message(FATAL_ERROR "error: expected_files do not exist: CPackComponentsDEB test fails. (CPack_output=${CPack_output}, CPack_error=${CPack_error}")
endif()

list(LENGTH actual_output actual_count)
if(NOT actual_count EQUAL expected_count)
  message(STATUS "actual_count='${actual_count}'")
  message(FATAL_ERROR "error: expected_count=${expected_count} does not match actual_count=${actual_count}: CPackComponents test fails. (CPack_output=${CPack_output}, CPack_error=${CPack_error})")
endif()


# dpkg-deb checks for the dependencies of the packages
find_program(DPKGDEB_EXECUTABLE dpkg-deb)
if(DPKGDEB_EXECUTABLE)
  set(dpkgdeb_output_errors_all "")
  foreach(_f IN LISTS actual_output)

    # extracts the metadata from the package
    run_dpkgdeb(dpkg_output
                FILENAME "${_f}"
                )

    dpkgdeb_return_specific_metaentry(dpkg_package_name
                                      DPKGDEB_OUTPUT "${dpkg_output}"
                                      METAENTRY "Package:")

    dpkgdeb_return_specific_metaentry(dpkg_depends
                                      DPKGDEB_OUTPUT "${dpkg_output}"
                                      METAENTRY "Depends:")

    message(STATUS "package='${dpkg_package_name}', dependencies='${dpkg_depends}'")

    if(dpkg_package_name STREQUAL "mylib-applications")
      if(NOT dpkg_depends STREQUAL "depend-application")
        set(dpkgdeb_output_errors_all ${dpkgdeb_output_errors_all}
                                      "dpkg-deb: ${_f}: Incorrect dependencies for package ${dpkg_package_name}: '${dpkg_depends}' != 'depend-application'\n")
      endif()
    elseif(dpkg_package_name STREQUAL "mylib-headers")
      if(NOT dpkg_depends STREQUAL "mylib-libraries (= 1.0.3), depend-headers")
        set(dpkgdeb_output_errors_all ${dpkgdeb_output_errors_all}
                                      "dpkg-deb: ${_f}: Incorrect dependencies for package ${dpkg_package_name}: '${dpkg_depends}' != 'mylib-libraries (= 1.0.3), depend-headers'\n")
      endif()
    elseif(dpkg_package_name STREQUAL "mylib-libraries")
      if(NOT dpkg_depends STREQUAL "depend-default")
        set(dpkgdeb_output_errors_all ${dpkgdeb_output_errors_all}
                                      "dpkg-deb: ${_f}: Incorrect dependencies for package ${dpkg_package_name}: '${dpkg_depends}' != 'depend-default'\n")
      endif()
    else()
      set(dpkgdeb_output_errors_all ${dpkgdeb_output_errors_all}
                                    "dpkg-deb: ${_f}: component name not found: ${dpkg_package_name}\n")
    endif()

  endforeach()


  if(NOT dpkgdeb_output_errors_all STREQUAL "")
    message(FATAL_ERROR "dpkg-deb checks failed:\n${dpkgdeb_output_errors_all}")
  endif()
else()
  message("dpkg-deb executable not found - skipping dpkg-deb test")
endif()