module xos-controller {
  namespace "urn:ietf:params:xml:ns:yang:xos-controller";
  prefix xos;
  yang-version 1.1;

  import ietf-yang-types { prefix yang; }
  import ietf-inet-types { prefix inet; }
  import iana-crypt-hash { prefix ianach; }
  import yang-meta-types { prefix meta; }
  import xos-types       { prefix xtype; }

  organization
   "Open Networking Lab / Corenova Technologies";

  contact
    "Larry Peterson <llp@onlab.us>
     Peter K. Lee <peter@corenova.com>";
  
  description
   "This module contains a collection of core models for XOS.  The core
    models represent primary first-order entities such as Tenant,
    Subscriber, Provider, and Service.

    Copyright (c) 2016 ON.LAB and the persons identified as authors of
    the code.  All rights reserved.

    Redistribution and use in source and binary forms, with or without
    modification, is permitted pursuant to, and subject to the license
    terms of the Apache License, Version 2.0 which accompanies this
    distribution, and is available at
    (http://www.apache.org/licenses/LICENSE-2.0).";
  
  revision 2016-07-14 {
    description "Initial revision.";
  }

  identity xos-tenant {
    description "Describes the type of tenant within XOS";
  }
  identity xos-subscriber {
    base xos-tenant;
  }
  identity xos-provider {
    base xos-tenant;
  }
  identity xos-service {
    base xos-provider;
  }
  
  feature synchronizer {
    description
      "Enables configuration synchronization to the distributed store.";
  }
  /*
   * Groupings
   */
  grouping record {
    description "Synchronizer-specific properties for model entities";
    
    leaf created { type yang:date-and-time; }
    leaf updated { type yang:date-and-time; }
    leaf enacted { type yang:date-and-time; }
    leaf policed { type yang:date-and-time; }
        
    leaf writable { type boolean; default true; }
    leaf locked   { type boolean; default false; }
    leaf deleted  { type boolean; default false; }
      
    leaf dirty {
      config false;
      type boolean;
      default false;
    }
      
    container sync {
      anydata register {
        description "scratchpad used by the Observer";
      }
      leaf progress {
        type enumeration {
          enum provisioning {
            value 0;
            description "Provisioning in progress";
          }
        }
      }
      leaf disabled { type boolean; default false; }
      leaf enforced { type boolean; default true; }

      list policy {
        // TODO: how are policy defined/enforced?
      }
    }
    action diff {
      description "retrieve diff of model state if dirty";
    }
    action save {
      description "trigger save into data store via synchronizer";
    }
  }
  grouping credentials-list {
    list credential {
      key token;
      leaf token {
        type string;
      }
      leaf password {
        type meta:password;
      }
      leaf user {
        type xtype:unique-identifier;
      }
      leaf role {
        type xtype:access-role;
      }
    }
  }
  grouping parameter {
    leaf name { type yang:yang-identifier; }
    leaf value { type string; }
    leaf content-type { type string; }
    leaf object-id { type uint32; }
  }
  grouping tenant {
    leaf id {
      type xtype:unique-identifier;
      mandatory true;
    }
    leaf name { type string { length 0..255; } }
    leaf kind {
      config false;
      type identityref {
        base xos-tenant;
      }
    }
    leaf description { type meta:description; }
    leaf enabled { type boolean; default true; }
    container record {
      if-feature synchronizer;
      uses xos:record;
    }
  }
  grouping subscriber {
    uses xos:tenant {
      refine kind { default xos-subscriber; }
    }
    leaf connectivity {
      type enumeration {
        enum public { description "Public"; }
        enum private { description "Private"; }
        enum private-unidirectional { description "Private Uni-directional"; }
        enum na { description "Not Applicable"; }
      }
      default na;
    }
  }
  grouping provider {
    uses xos:tenant {
      refine kind { default xos-provider; }
    }
    uses xos:credentials-list;
  }
  grouping service {
    uses xos:provider {
      refine 'name' {
        description "Name of the Service";
      }
    }
    leaf view-url {
      type inet:uri;
    }
    leaf icon-url {
      type inet:uri;
    }
    leaf published {
      type boolean;
      default true;
    }
    list keypair {
      description "collection of public/private key pair(s)";
      // should be a specific typedef for storing this content
      leaf public  { type string { length 0..1024; } }
      leaf private { type string { length 0..1024; } }
    }
    list attribute {
      key name;
      leaf name  { type string { length 0..128; } }
      leaf value { type string; }
      status deprecated;
      reference "XOS: service-specific-attribute";
      description "backwards-compatible attribute association";
    }
    leaf service-specific-id {
      type xtype:unique-identifier;
      status deprecated;
    }
    list subscriber {
      description
        "Each entry represents a subscriber of the service. Each unique service
         provider should augment this block with service specific
         attributes.";
      key id;
      uses xos:subscriber;
      notification subscriber-added;
      notification subscriber-deleted;
    }
    // TODO: need to better understand relationship between Service and VTN
  }
  /*
   * Configuration data nodes (main configuration tree for XOS)
   */
  container core {
    description
      "Primary endpoint for additional core entities to augment";
    uses xos:provider;
  }
  container service {
    description
      "Primary endpoint for services to augment";
  }
  container tenant {
    description
      "Primary endpoint for tenants to augment";
  }
}