{
  "version": "1.3",
  "parameters": {
    "region": {
      "type": "string",
      "builtIn": "AWS::Region",
      "required": true
    },
    "useDualStackEndpoint": {
      "type": "boolean",
      "builtIn": "AWS::UseDualStack"
    },
    "useFIPSEndpoint": {
      "type": "boolean",
      "builtIn": "AWS::UseFIPS"
    },
    "endpointId": {
      "type": "string"
    }
  },
  "rules": [
    {
      "conditions": [
        {
          "fn": "aws.partition",
          "argv": [
            {
              "ref": "region"
            }
          ],
          "assign": "partitionResult"
        }
      ],
      "rules": [
        {
          "conditions": [
            {
              "fn": "isSet",
              "argv": [
                {
                  "ref": "endpointId"
                }
              ]
            }
          ],
          "rules": [
            {
              "conditions": [
                {
                  "fn": "isSet",
                  "argv": [
                    {
                      "ref": "useFIPSEndpoint"
                    }
                  ]
                },
                {
                  "fn": "booleanEquals",
                  "argv": [
                    {
                      "ref": "useFIPSEndpoint"
                    },
                    true
                  ]
                }
              ],
              "error": "FIPS endpoints not supported with multi-region endpoints",
              "type": "error"
            },
            {
              "conditions": [
                {
                  "fn": "not",
                  "argv": [
                    {
                      "fn": "isSet",
                      "argv": [
                        {
                          "ref": "useFIPSEndpoint"
                        }
                      ]
                    }
                  ]
                },
                {
                  "fn": "isSet",
                  "argv": [
                    {
                      "ref": "useDualStackEndpoint"
                    }
                  ]
                },
                {
                  "fn": "booleanEquals",
                  "argv": [
                    {
                      "ref": "useDualStackEndpoint"
                    },
                    true
                  ]
                }
              ],
              "endpoint": {
                "url": "https://{endpointId}.endpoint.events.{partitionResult#dualStackDnsSuffix}",
                "properties": {
                  "authSchemes": [
                    {
                      "name": "sigv4a",
                      "signingName": "events",
                      "signingRegionSet": [
                        "*"
                      ]
                    }
                  ]
                }
              },
              "type": "endpoint"
            },
            {
              "conditions": [],
              "endpoint": {
                "url": "https://{endpointId}.endpoint.events.{partitionResult#dnsSuffix}",
                "properties": {
                  "authSchemes": [
                    {
                      "name": "sigv4a",
                      "signingName": "events",
                      "signingRegionSet": [
                        "*"
                      ]
                    }
                  ]
                }
              },
              "type": "endpoint"
            }
          ],
          "type": "tree"
        },
        {
          "conditions": [
            {
              "fn": "isValidHostLabel",
              "argv": [
                {
                  "ref": "region"
                },
                false
              ]
            }
          ],
          "rules": [
            {
              "conditions": [
                {
                  "fn": "isSet",
                  "argv": [
                    {
                      "ref": "useFIPSEndpoint"
                    }
                  ]
                },
                {
                  "fn": "booleanEquals",
                  "argv": [
                    {
                      "ref": "useFIPSEndpoint"
                    },
                    true
                  ]
                },
                {
                  "fn": "not",
                  "argv": [
                    {
                      "fn": "isSet",
                      "argv": [
                        {
                          "ref": "useDualStackEndpoint"
                        }
                      ]
                    }
                  ]
                }
              ],
              "endpoint": {
                "url": "https://events-fips.{region}.{partitionResult#dnsSuffix}",
                "properties": {
                  "authSchemes": [
                    {
                      "name": "sigv4a",
                      "signingName": "events",
                      "signingRegionSet": [
                        "*"
                      ]
                    }
                  ]
                }
              },
              "type": "endpoint"
            },
            {
              "conditions": [
                {
                  "fn": "isSet",
                  "argv": [
                    {
                      "ref": "useDualStackEndpoint"
                    }
                  ]
                },
                {
                  "fn": "booleanEquals",
                  "argv": [
                    {
                      "ref": "useDualStackEndpoint"
                    },
                    true
                  ]
                },
                {
                  "fn": "not",
                  "argv": [
                    {
                      "fn": "isSet",
                      "argv": [
                        {
                          "ref": "useFIPSEndpoint"
                        }
                      ]
                    }
                  ]
                }
              ],
              "endpoint": {
                "url": "https://events.{region}.{partitionResult#dualStackDnsSuffix}",
                "properties": {
                  "authSchemes": [
                    {
                      "name": "sigv4a",
                      "signingName": "events",
                      "signingRegionSet": [
                        "*"
                      ]
                    }
                  ]
                }
              },
              "type": "endpoint"
            },
            {
              "conditions": [
                {
                  "fn": "isSet",
                  "argv": [
                    {
                      "ref": "useDualStackEndpoint"
                    }
                  ]
                },
                {
                  "fn": "isSet",
                  "argv": [
                    {
                      "ref": "useFIPSEndpoint"
                    }
                  ]
                },
                {
                  "fn": "booleanEquals",
                  "argv": [
                    {
                      "ref": "useDualStackEndpoint"
                    },
                    true
                  ]
                },
                {
                  "fn": "booleanEquals",
                  "argv": [
                    {
                      "ref": "useFIPSEndpoint"
                    },
                    true
                  ]
                }
              ],
              "endpoint": {
                "url": "https://events-fips.{region}.{partitionResult#dualStackDnsSuffix}",
                "properties": {
                  "authSchemes": [
                    {
                      "name": "sigv4a",
                      "signingName": "events",
                      "signingRegionSet": [
                        "*"
                      ]
                    }
                  ]
                }
              },
              "type": "endpoint"
            },
            {
              "conditions": [],
              "endpoint": {
                "url": "https://events.{region}.{partitionResult#dnsSuffix}"
              },
              "type": "endpoint"
            }
          ],
          "type": "tree"
        },
        {
          "conditions": [],
          "error": "{region} is not a valid HTTP host-label",
          "type": "error"
        }
      ],
      "type": "tree"
    }
  ]
}