module netconf-node-topology {
    namespace "urn:opendaylight:netconf-node-topology";
    prefix "nettop";

    import network-topology { prefix nt; revision-date 2013-10-21; }
    import yang-ext { prefix ext; revision-date "2013-07-09";}
    import ietf-inet-types { prefix inet; revision-date "2013-07-15"; }

    revision "2015-01-14" {
        description "Initial revision of Topology model";
    }

    augment "/nt:network-topology/nt:topology/nt:topology-types" {
        container topology-netconf {
        }
    }

    grouping netconf-node-credentials {

        choice credentials {
            config true;
            case login-password {
                leaf username {
                    type string;
                }

                leaf password {
                    type string;
                }
            }
        }
    }

    grouping netconf-node-connection-parameters {

        leaf host {
            type inet:host;
        }

        leaf port {
            type inet:port-number;
        }

        leaf tcp-only {
            config true;
            type boolean;
        }

        leaf schemaless {
            type boolean;
            default false;
        }

        container yang-module-capabilities {
            config true;
            leaf override {
                type boolean;
                default false;
                description "Whether to override or merge this list of capabilities with capabilities from device";
            }

            leaf-list capability {
                type string;
                description "Set a list of capabilities to override capabilities provided in device's hello message.
                             Can be used for devices that do not report any yang modules in their hello message";
            }
        }

        container non-module-capabilities {
            config true;
            leaf override {
                type boolean;
                default false;
                description "Whether to override or merge this list of non-module based capabilities with non-module
                             based capabilities from device";
            }

            leaf-list capability {
                type string;
                description "Set a list of non-module based capabilities to override or merge non-module capabilities
                             provided in device's hello message. Can be used for devices that do not report or
                             incorrectly report non-module based capabilities in their hello message";
            }
        }

        leaf reconnect-on-changed-schema {
            config true;
            type boolean;
            default false;
            description "If true, the connector would auto disconnect/reconnect when schemas are changed in the remote device.
                         The connector subscribes (right after connect) to base netconf notifications and listens for netconf-capability-change notification";
        }

        leaf connection-timeout-millis {
            description "Specifies timeout in milliseconds after which connection must be established.";
            config true;
            type uint32;
            default 20000;
        }

        leaf default-request-timeout-millis {
            description "Timeout for blocking operations within transactions.";
            config true;
            type uint32;
            default 60000;
        }

        leaf max-connection-attempts {
            description "Maximum number of connection retries. Non positive value or null is interpreted as infinity.";
            config true;
            type uint32;
            default 0; // retry forever
        }

        leaf between-attempts-timeout-millis {
            description "Initial timeout in milliseconds to wait between connection attempts. Will be multiplied by sleep-factor with every additional attempt";
            config true;
            type uint16;
            default 2000;
        }

        leaf sleep-factor {
            config true;
            type decimal64 {
                fraction-digits 1;
            }
            default 1.5;
        }

        // Keepalive configuration
        leaf keepalive-delay {
            config true;
            type uint32;
            default 120;
            description "Netconf connector sends keepalive RPCs while the session is idle, this delay specifies the delay between keepalive RPC in seconds
                         If a value <1 is provided, no keepalives will be sent";
        }

        leaf concurrent-rpc-limit {
            config true;
            type uint16;
            default 0;
            description "Limit of concurrent messages that can be send before reply messages are received.
                         If value <1 is provided, no limit will be enforced";
        }

        leaf actor-response-wait-time {
                    config true;
                    type uint16 {
                      range "1..max";
                    }
                    default 5;
                    description "Time that slave actor will wait for response from master.";
        }
    }

    grouping netconf-node-connection-status {

        leaf connection-status {
            config false;
            type enumeration {
                enum connecting;
                enum connected;
                enum unable-to-connect;
            }
        }

        container clustered-connection-status {
            config false;
            list node-status {
                leaf node {
                    type string;
                }
                leaf status {
                    type enumeration {
                        enum connected;
                        enum unavailable;
                        enum failed;
                    }
                }
            }
            leaf netconf-master-node {
                config false;
                type string;
            }
        }

        leaf connected-message {
            config false;
            type string;
        }

        container available-capabilities {
            config false;
            list available-capability {
                leaf capability {
                    type string;
                }
                leaf capability-origin {
                    type enumeration {
                        enum user-defined;
                        enum device-advertised;
                    }
                }
            }
        }

        container unavailable-capabilities {
            config false;
            list unavailable-capability {
                leaf capability {
                    type string;
                }

                leaf failure-reason {
                    type enumeration {
                        enum missing-source;
                        enum unable-to-resolve;
                    }
                }
            }
        }

        container pass-through {
            when "../connection-status = connected";
            description
                "When the underlying node is connected, its NETCONF context
                is available verbatim under this container through the
                mount extension.";
        }

    }

    grouping netconf-schema-storage {
        leaf schema-cache-directory {
            config true;
            type string;
            default "schema";
            description "The destination schema repository for yang files relative to the cache directory.  This may be specified per netconf mount
                         so that the loaded yang files are stored to a distinct directory to avoid potential conflict.";
        }

        container yang-library {
            leaf yang-library-url {
                config true;
                type inet:uri;
                description "Yang library to be plugged as additional source provider into the shared schema repository";
            }

            // credentials for basic http authentication
            leaf username {
                config true;
                type string;
            }

            leaf password {
                config true;
                type string;
            }
        }
    }

    grouping netconf-node-fields {

        uses netconf-node-credentials;

        uses netconf-node-connection-parameters;

        uses netconf-node-connection-status;

        uses netconf-schema-storage;

    }

    rpc add-netconf-node {
        input {
            uses netconf-node-fields;
            leaf node-id {
                type string;
            }
            leaf encrypt {
                type boolean;
                default false;
            }
        }
    }

    augment "/nt:network-topology/nt:topology/nt:node" {
        when "../../nt:topology-types/topology-netconf";
        ext:augment-identifier "netconf-node";

        uses netconf-node-fields;
    }

}