require_relative './odbc'

module Carto
  class Connector

    # PostgreSQL provider using [psqlODBC](https://odbc.postgresql.org/) driver
    #
    # For complete list of parameters, see these references:
    # * https://odbc.postgresql.org/docs/config-opt.html
    # * https://git.postgresql.org/gitweb/?p=psqlodbc.git;a=blob;f=dlg_specific.c;h=28ebf54b5a87fdfe1f6091ccab9c610edb5556bb;hb=HEAD#l529
    # * https://odbc.postgresql.org/docs/config.html
    #
    class PostgreSQLProvider < OdbcProvider

      private

      DEFAULT_SCHEMA = 'public'.freeze

      def fixed_connection_attributes
        {
          Driver:               'PostgreSQL Unicode',
          ByteaAsLongVarBinary: 1,
          MaxVarcharSize:       256,
          BoolsAsChar:          0
        }
      end

      def required_connection_attributes
        {
          server:   :Server,
          database: :Database,
          username: :UID
        }
      end

      def optional_connection_attributes
        {
          port: { Port: 5432 },
          password: { PWD: nil },
          sslmode: { SSLmode: 'require' }
        }
      end

      def non_connection_parameters
        # Default remote schema
        super.reverse_merge(schema: DEFAULT_SCHEMA)
      end
    end
  end
end