import efl_net_http_types;

enum Efl.Net.Dialer.Http.Primary_Mode {
    auto,
    download,
    upload,
}

class Efl.Net.Dialer.Http (Efl.Loop_User, Efl.Net.Dialer, Efl.Io.Sizer) {
    [[HTTP Dialer (Client).

      The effective URL in use, if @.allow_redirects is $true will be
      available as @Efl.Net.Socket.address_remote. The
      @Efl.Net.Socket.address_local is an IP:PORT pair.

      The dialer can do bi-directional information exchange. It can
      also do a PUT and upload a file, or GET and download one. Anoter
      case is to do a POST with some form values, including a file,
      and retrieve its headers and response body. To make usage more
      streamlined, choose your primary interest with @.primary_mode
      then get some properties such as @Efl.Io.Sizer.size to report or
      use what matters to your use case.

      If @.allow_redirects is $true, multiple "connected" and
      "resolved" signals will be dispatched, one for each
      connection. Then @.response_status and @.response_headers_get
      will keep changing. Using @.response_headers_all_get one can see
      the whole history of headers and connections.

      To enable debugging use EINA_LOG_LEVELS=ecore_con:4 environment
      variable.

      @since 1.19
    ]]
    methods {
        @property method {
            [[The HTTP method to use.

              A string representing the HTTP method to use, such as
              GET, POST, HEAD, PUT, DELETE...

              This should be set before dialing.
            ]]
            get { }
            set { }
            values {
                method: string;
            }
        }

        @property primary_mode {
            [[Is this request primarily a download or upload?

              This property will change the behavior of @Efl.Io.Sizer:

               - if @Efl.Net.Dialer.Http.Primary_Mode.auto, then
                 @Efl.Net.Dialer.Http.Primary_Mode.download or
                 @Efl.Net.Dialer.Http.Primary_Mode.upload will be
                 choosen based on the @.method: if "PUT", then it's
                 upload, otherwise it's download.

               - if @Efl.Net.Dialer.Http.Primary_Mode.upload, applying
                 a new size with @Efl.Io.Sizer.resize or
                 @Efl.Io.Sizer.size.set will specify the
                 "Content-Length" to upload. If no size is previously
                 set, then the upload will happen in
                 "Transfer-encoding: chunked".

               - if @Efl.Net.Dialer.Http.Primary_Mode.download, then
                 @Efl.Io.Sizer.size.get will report the
                 "Content-Length" provided by the server, if any.

               If is worth to mention that one can provide and
               retrieve these values using @.request_headers_get (to
               send) and @.response_headers_get (what was received),
               as well as using the specific properties
               @.request_content_length (upload) and
               @.response_content_length (download).
            ]]
            get {
                [[The effective primary mode.

                  This will return one of
                  @Efl.Net.Dialer.Http.Primary_Mode.download or
                  @Efl.Net.Dialer.Http.Primary_Mode.upload. If "auto"
                  was set (the default), then it will pick the best
                  based on the @.method in use.
                ]]
            }
            set { }
            values {
                primary_mode: Efl.Net.Dialer.Http.Primary_Mode;
            }
        }

        @property user_agent {
            [[The User-Agent to specify.

              This should be set before dialing.
            ]]
            get { }
            set { }
            values {
                user_agent: string;
            }
        }

        @property http_version {
            [[The HTTP version to use.

              This should be set before dialing.

              Once connected, it will change to the actual connection
              HTTP version, so check after "connected" event.
            ]]
            get { }
            set { }
            values {
                http_version: Efl.Net.Http.Version;
            }
        }

        @property authentication {
            [[HTTP authentication to use.

              This should be set before dialing.
            ]]
            get { }
            set { }
            values {
                username: string;
                password: string;
                method: Efl.Net.Http.Authentication_Method @optional; [[authentication method to use, defaults to @Efl.Net.Http.Authentication_Method.basic]]
                restricted: bool @optional; [[restrict method]]
            }
        }

        @property allow_redirects {
            [[Allow HTTP redirects to be followed.

              This should be set before dialing.
            ]]
            get { }
            set { }
            values {
                allow_redirects: bool;
            }
        }

        request_header_add {
            [[Add a request header 'key: value'.

              See @.request_headers_clear

              This should be called before dialing.
            ]]
            params {
                @in key: string;
                @in value: string;
            }
        }

        request_headers_clear {
            [[Clear all request headers.

              See @.request_header_add

              This should be called before dialing.
            ]]
        }

        request_headers_get {
            [[Return an iterator to the key-value pairs for request headers]]
            return: free(own(iterator<Efl.Net.Http.Header>), eina_iterator_free) @warn_unused;
        }

        @property request_content_length {
            [["Content-Length:" Header used for uploading/sending.

              To unset use -1
            ]]
            get { }
            set { }
            values {
                length: int64;
            }
        }

        @property response_content_length {
            [["Content-Length:" Header used for downloading/receiving.

              If unset is -1.
            ]]
            get { }
            set @protected { }
            values {
                length: int64;
            }
        }

        @property response_content_type {
            [["Content-Type:" Header used for downloading/receiving]]
            get { }
            set @protected { }
            values {
                content_type: string;
            }
        }

        @property response_status {
            [[The HTTP response status of this request.

              It will be 0 if not connected, otherwise will be what is
              returned by the server, such as.

              See https://en.wikipedia.org/wiki/List_of_HTTP_status_codes

              This will be usable after "connected" event is dispatched.
            ]]
            get { }
            values {
                status_code: Efl.Net.Http.Status;
            }
        }

        response_headers_get {
            [[Return an iterator to the key-value pairs for the last response headers.

              Since multiple requests can happen if @.allow_redirects
              is true, then all headers will be accumulated. This
              method returns only the headers for the last request.

              To know all the headers, check @.response_headers_all_get.

              This will be usable after "headers,done" event is dispatched.
            ]]
            return: free(own(iterator<Efl.Net.Http.Header>), eina_iterator_free) @warn_unused;
        }

        response_headers_all_get {
            [[Return an iterator to the key-value pairs for all response headers.

              Since multiple requests can happen if @.allow_redirects
              is true, then all headers will be accumulated. To know
              when new request is started, check for headers with keys
              being NULL, the value will be the "HTTP/VERSION RESPONSE"
              string received from the host, such as:

                - key=NULL, value="HTTP/1.1 302 Found"
                - key="Location", value="http://someredirect.com"
                - key=NULL, value="HTTP/1.1 200 Ok"
                - key="Content-Type", value="text/html"

              Which mean the original request had a redirect to
              http://someredirect.com.

              To receive an iterator to just the last request, use
              @.response_headers_get

              This will be usable after "headers,done" event is dispatched.
            ]]
            return: free(own(iterator<Efl.Net.Http.Header>), eina_iterator_free) @warn_unused;
        }

        response_headers_clear {
            [[Save some memory by disposing the received headers]]
        }

        @property progress_download {
            [[How many bytes were downloaded and how much was expected.]]
            get { }
            values {
                downloaded: uint64 @optional;
                total: uint64 @optional; [[0 if unknown]]
            }
        }

        @property progress_upload {
            [[How many bytes were uploaded and how much was expected.]]
            get { }
            values {
                uploaded: uint64 @optional;
                total: uint64 @optional; [[0 if unknown]]
            }
        }

        @property cookie_jar {
            [[This property sets the filename where to read and write cookies.

              By setting a file to load and persist cookies to, the
              internal cookie system will be activated, automatically
              handling HTTP headers such as 'Set-cookie:' and sending
              the appropriate cookies for a server.

              If a new, empty session is to be used, start with an
              empty or non-existent file such as created with
              mkstemp() or tmpfile(). An alternative is to use an
              empty string ("") to keep it in memory.

              If it is desired to start from a pre-existent cookie jar
              but do not want to modify that, first copy that file and
              then pass the new, temporary file.

              Likewise, if it's desired to fill some cookies to the
              system, create a cookie jar and pass its path to this
              property.

              \@note that whenever this property is set, even if to the
              same value, it will flush all cookies to the previously
              set file, then erase all known cookies, then use the new
              file (if any).
            ]]
            get { }
            set { }
            values {
                path: string;
            }
        }
    }

    events {
        headers,done; [[Notifies all headers were parsed and are available.]]
    }

    implements {
        Efl.Object.constructor;
        Efl.Object.destructor;
        Efl.Net.Dialer.dial;
        Efl.Net.Dialer.address_dial;
        Efl.Net.Dialer.connected;
        Efl.Net.Dialer.proxy;
        Efl.Net.Dialer.timeout_dial;
        Efl.Net.Socket.address_local;
        Efl.Net.Socket.address_remote;
        Efl.Io.Reader.read;
        Efl.Io.Reader.can_read.get;
        Efl.Io.Reader.can_read.set;
        Efl.Io.Reader.eos.get;
        Efl.Io.Reader.eos.set;
        Efl.Io.Writer.write;
        Efl.Io.Writer.can_write.get;
        Efl.Io.Writer.can_write.set;
        Efl.Io.Closer.close;
        Efl.Io.Closer.closed.get;
        Efl.Io.Closer.close_on_exec;
        Efl.Io.Closer.close_on_destructor;
        Efl.Io.Sizer.resize;
        Efl.Io.Sizer.size.get;
    }
}