module RestClient

  # Hash of HTTP status code => message.
  #
  # 1xx: Informational - Request received, continuing process
  # 2xx: Success - The action was successfully received, understood, and
  #      accepted
  # 3xx: Redirection - Further action must be taken in order to complete the
  #      request
  # 4xx: Client Error - The request contains bad syntax or cannot be fulfilled
  # 5xx: Server Error - The server failed to fulfill an apparently valid
  #      request
  #
  # @see
  #   http://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml
  #
  STATUSES = {100 => 'Continue',
              101 => 'Switching Protocols',
              102 => 'Processing', #WebDAV

              200 => 'OK',
              201 => 'Created',
              202 => 'Accepted',
              203 => 'Non-Authoritative Information', # http/1.1
              204 => 'No Content',
              205 => 'Reset Content',
              206 => 'Partial Content',
              207 => 'Multi-Status', #WebDAV
              208 => 'Already Reported', # RFC5842
              226 => 'IM Used', # RFC3229

              300 => 'Multiple Choices',
              301 => 'Moved Permanently',
              302 => 'Found',
              303 => 'See Other', # http/1.1
              304 => 'Not Modified',
              305 => 'Use Proxy', # http/1.1
              306 => 'Switch Proxy', # no longer used
              307 => 'Temporary Redirect', # http/1.1
              308 => 'Permanent Redirect', # RFC7538

              400 => 'Bad Request',
              401 => 'Unauthorized',
              402 => 'Payment Required',
              403 => 'Forbidden',
              404 => 'Not Found',
              405 => 'Method Not Allowed',
              406 => 'Not Acceptable',
              407 => 'Proxy Authentication Required',
              408 => 'Request Timeout',
              409 => 'Conflict',
              410 => 'Gone',
              411 => 'Length Required',
              412 => 'Precondition Failed',
              413 => 'Payload Too Large', # RFC7231 (renamed, see below)
              414 => 'URI Too Long', # RFC7231 (renamed, see below)
              415 => 'Unsupported Media Type',
              416 => 'Range Not Satisfiable', # RFC7233 (renamed, see below)
              417 => 'Expectation Failed',
              418 => 'I\'m A Teapot', #RFC2324
              421 => 'Too Many Connections From This IP',
              422 => 'Unprocessable Entity', #WebDAV
              423 => 'Locked', #WebDAV
              424 => 'Failed Dependency', #WebDAV
              425 => 'Unordered Collection', #WebDAV
              426 => 'Upgrade Required',
              428 => 'Precondition Required', #RFC6585
              429 => 'Too Many Requests', #RFC6585
              431 => 'Request Header Fields Too Large', #RFC6585
              449 => 'Retry With', #Microsoft
              450 => 'Blocked By Windows Parental Controls', #Microsoft

              500 => 'Internal Server Error',
              501 => 'Not Implemented',
              502 => 'Bad Gateway',
              503 => 'Service Unavailable',
              504 => 'Gateway Timeout',
              505 => 'HTTP Version Not Supported',
              506 => 'Variant Also Negotiates',
              507 => 'Insufficient Storage', #WebDAV
              508 => 'Loop Detected', # RFC5842
              509 => 'Bandwidth Limit Exceeded', #Apache
              510 => 'Not Extended',
              511 => 'Network Authentication Required', # RFC6585
  }

  STATUSES_COMPATIBILITY = {
    # The RFCs all specify "Not Found", but "Resource Not Found" was used in
    # earlier RestClient releases.
    404 => ['ResourceNotFound'],

    # HTTP 413 was renamed to "Payload Too Large" in RFC7231.
    413 => ['RequestEntityTooLarge'],

    # HTTP 414 was renamed to "URI Too Long" in RFC7231.
    414 => ['RequestURITooLong'],

    # HTTP 416 was renamed to "Range Not Satisfiable" in RFC7233.
    416 => ['RequestedRangeNotSatisfiable'],
  }


  # This is the base RestClient exception class. Rescue it if you want to
  # catch any exception that your request might raise
  # You can get the status code by e.http_code, or see anything about the
  # response via e.response.
  # For example, the entire result body (which is
  # probably an HTML error page) is e.response.
  class Exception < RuntimeError
    attr_accessor :response
    attr_accessor :original_exception
    attr_writer :message

    def initialize response = nil, initial_response_code = nil
      @response = response
      @message = nil
      @initial_response_code = initial_response_code
    end

    def http_code
      # return integer for compatibility
      if @response
        @response.code.to_i
      else
        @initial_response_code
      end
    end

    def http_headers
      @response.headers if @response
    end

    def http_body
      @response.body if @response
    end

    def to_s
      message
    end

    def message
      @message || default_message
    end

    def default_message
      self.class.name
    end
  end

  # Compatibility
  class ExceptionWithResponse < Exception
  end

  # The request failed with an error code not managed by the code
  class RequestFailed < ExceptionWithResponse

    def default_message
      "HTTP status code #{http_code}"
    end

    def to_s
      message
    end
  end

  # RestClient exception classes. TODO: move all exceptions into this module.
  #
  # We will a create an exception for each status code, see
  # http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
  #
  module Exceptions
    # Map http status codes to the corresponding exception class
    EXCEPTIONS_MAP = {}
  end

  # Create HTTP status exception classes
  STATUSES.each_pair do |code, message|
    klass = Class.new(RequestFailed) do
      send(:define_method, :default_message) {"#{http_code ? "#{http_code} " : ''}#{message}"}
    end
    klass_constant = const_set(message.delete(' \-\''), klass)
    Exceptions::EXCEPTIONS_MAP[code] = klass_constant
  end

  # Create HTTP status exception classes used for backwards compatibility
  STATUSES_COMPATIBILITY.each_pair do |code, compat_list|
    klass = Exceptions::EXCEPTIONS_MAP.fetch(code)
    compat_list.each do |old_name|
      const_set(old_name, klass)
    end
  end

  module Exceptions
    # We have to split the Exceptions module like we do here because the
    # EXCEPTIONS_MAP is under Exceptions, but we depend on
    # RestClient::RequestTimeout below.

    # Base class for request timeouts.
    #
    # NB: Previous releases of rest-client would raise RequestTimeout both for
    # HTTP 408 responses and for actual connection timeouts.
    class Timeout < RestClient::RequestTimeout
      def initialize(message=nil, original_exception=nil)
        super(nil, nil)
        self.message = message if message
        self.original_exception = original_exception if original_exception
      end
    end

    # Timeout when connecting to a server. Typically wraps Net::OpenTimeout (in
    # ruby 2.0 or greater).
    class OpenTimeout < Timeout
      def default_message
        'Timed out connecting to server'
      end
    end

    # Timeout when reading from a server. Typically wraps Net::ReadTimeout (in
    # ruby 2.0 or greater).
    class ReadTimeout < Timeout
      def default_message
        'Timed out reading data from server'
      end
    end
  end


  # The server broke the connection prior to the request completing.  Usually
  # this means it crashed, or sometimes that your network connection was
  # severed before it could complete.
  class ServerBrokeConnection < Exception
    def initialize(message = 'Server broke connection')
      super nil, nil
      self.message = message
    end
  end

  class SSLCertificateNotVerified < Exception
    def initialize(message = 'SSL certificate not verified')
      super nil, nil
      self.message = message
    end
  end
end
