{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://api-evangelist.github.io/software-defined-networking/json-schema/sdn-network-topology-schema.json",
  "title": "SDN Network Topology",
  "description": "JSON Schema for Software-Defined Networking (SDN) network topology representation, compatible with OpenDaylight and ONOS REST API responses",
  "type": "object",
  "properties": {
    "topology": {
      "$ref": "#/definitions/Topology"
    }
  },
  "definitions": {
    "Topology": {
      "type": "object",
      "properties": {
        "topology-id": {
          "type": "string",
          "description": "Unique identifier for the topology"
        },
        "node": {
          "type": "array",
          "items": {
            "$ref": "#/definitions/Node"
          },
          "description": "List of network nodes (switches, routers, hosts)"
        },
        "link": {
          "type": "array",
          "items": {
            "$ref": "#/definitions/Link"
          },
          "description": "List of links connecting topology nodes"
        }
      }
    },
    "Node": {
      "type": "object",
      "required": ["node-id"],
      "properties": {
        "node-id": {
          "type": "string",
          "description": "Unique identifier for the network node"
        },
        "termination-point": {
          "type": "array",
          "items": {
            "$ref": "#/definitions/TerminationPoint"
          },
          "description": "Physical or logical ports on the node"
        },
        "node-type": {
          "type": "string",
          "enum": ["switch", "router", "host", "controller"],
          "description": "Type of network node"
        },
        "ip-address": {
          "type": "string",
          "format": "ipv4",
          "description": "Management IP address of the node"
        },
        "mac-address": {
          "type": "string",
          "pattern": "^([0-9A-Fa-f]{2}:){5}[0-9A-Fa-f]{2}$",
          "description": "MAC address of the node"
        }
      }
    },
    "TerminationPoint": {
      "type": "object",
      "properties": {
        "tp-id": {
          "type": "string",
          "description": "Termination point (port) identifier"
        },
        "port-number": {
          "type": "integer",
          "description": "OpenFlow port number"
        }
      }
    },
    "Link": {
      "type": "object",
      "required": ["link-id", "source", "destination"],
      "properties": {
        "link-id": {
          "type": "string",
          "description": "Unique link identifier"
        },
        "source": {
          "$ref": "#/definitions/LinkEndpoint"
        },
        "destination": {
          "$ref": "#/definitions/LinkEndpoint"
        },
        "bandwidth": {
          "type": "integer",
          "description": "Link bandwidth in Mbps"
        }
      }
    },
    "LinkEndpoint": {
      "type": "object",
      "properties": {
        "source-node": {
          "type": "string",
          "description": "Node ID of the link endpoint"
        },
        "source-tp": {
          "type": "string",
          "description": "Termination point (port) ID of the link endpoint"
        }
      }
    },
    "FlowRule": {
      "type": "object",
      "required": ["deviceId", "priority"],
      "properties": {
        "id": {
          "type": "string",
          "description": "Flow rule identifier"
        },
        "deviceId": {
          "type": "string",
          "description": "Device (switch) the flow rule applies to"
        },
        "priority": {
          "type": "integer",
          "minimum": 0,
          "maximum": 65535,
          "description": "Flow rule priority (higher overrides lower)"
        },
        "tableId": {
          "type": "integer",
          "description": "Flow table ID"
        },
        "selector": {
          "$ref": "#/definitions/FlowSelector"
        },
        "treatment": {
          "$ref": "#/definitions/FlowTreatment"
        }
      }
    },
    "FlowSelector": {
      "type": "object",
      "properties": {
        "criteria": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "type": {
                "type": "string",
                "enum": ["ETH_TYPE", "IPV4_DST", "IPV4_SRC", "IN_PORT", "ETH_DST", "ETH_SRC"]
              },
              "ethType": {"type": "string"},
              "ip": {"type": "string"},
              "port": {"type": "integer"}
            }
          }
        }
      }
    },
    "FlowTreatment": {
      "type": "object",
      "properties": {
        "instructions": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "type": {
                "type": "string",
                "enum": ["OUTPUT", "DROP", "GOTO_TABLE", "METER"]
              },
              "port": {"type": "string"}
            }
          }
        }
      }
    }
  }
}