{
  "version": "1.3",
  "parameters": {
    "Region": {
      "type": "string",
      "builtIn": "AWS::Region"
    },
    "Bucket": {
      "type": "string"
    },
    "TestCaseId": {
      "type": "string"
    }
  },
  "rules": [
    {
      "documentation": "tests of invalid arns",
      "conditions": [
        {
          "fn": "isSet",
          "argv": [
            {
              "ref": "TestCaseId"
            }
          ]
        },
        {
          "fn": "isSet",
          "argv": [
            {
              "ref": "Bucket"
            }
          ]
        },
        {
          "fn": "stringEquals",
          "argv": [
            "{TestCaseId}",
            "invalid-arn"
          ]
        }
      ],
      "type": "tree",
      "rules": [
        {
          "conditions": [
            {
              "fn": "aws.parseArn",
              "argv": ["{Bucket}"]
            }
          ],
          "type": "error",
          "error": "A valid ARN was parsed but `{Bucket}` is not a valid ARN"
        },
        {
          "conditions": [],
          "type": "error",
          "error": "Test case passed: `{Bucket}` is not a valid ARN."
        }
      ]
    },
    {
      "documentation": "tests of valid arns",
      "conditions": [
        {
          "fn": "isSet",
          "argv": [
            {
              "ref": "TestCaseId"
            }
          ]
        },
        {
          "fn": "isSet",
          "argv": [
            {
              "ref": "Bucket"
            }
          ]
        },
        {
          "fn": "stringEquals",
          "argv": [
            "{TestCaseId}",
            "valid-arn"
          ]
        }
      ],
      "type": "tree",
      "rules": [
        {
          "conditions": [
            {
              "fn": "aws.parseArn",
              "argv": ["{Bucket}"],
              "assign": "arn"
            },
            {
              "fn": "getAttr",
              "argv": [{"ref": "arn"}, "resourceId[0]"],
              "assign": "resource"
            }
          ],
          "type": "error",
          "error": "Test case passed: A valid ARN was parsed: service: `{arn#service}`, partition: `{arn#partition}, region: `{arn#region}`, accountId: `{arn#accountId}`, resource: `{resource}`"
        },
        {
          "conditions": [],
          "type": "error",
          "error": "Test case failed: `{Bucket}` is a valid ARN but parseArn failed to parse it."
        }
      ]
    },
    {
      "documentation": "region is set",
      "conditions": [
        {
          "fn": "isSet",
          "argv": [
            {
              "ref": "Region"
            }
          ]
        },
        {
          "fn": "aws.partition",
          "argv": [
            "{Region}"
          ],
          "assign": "partitionResult"
        }
      ],
      "rules": [
        {
          "documentation": "bucket is set, handle bucket specific endpoints",
          "conditions": [
            {
              "fn": "isSet",
              "argv": [
                {
                  "ref": "Bucket"
                }
              ]
            }
          ],
          "rules": [
            {
              "documentation": "bucket is set and is an arn",
              "conditions": [
                {
                  "fn": "aws.parseArn",
                  "argv": [
                    {
                      "ref": "Bucket"
                    }
                  ],
                  "assign": "bucketArn"
                }
              ],
              "rules": [
                {
                  "conditions": [
                    {
                      "fn": "getAttr",
                      "argv": [
                        {
                          "ref": "bucketArn"
                        },
                        "resourceId[1]"
                      ],
                      "assign": "outpostId"
                    }
                  ],
                  "rules": [
                    {
                      "conditions": [
                        {
                          "fn": "stringEquals",
                          "argv": [
                            "{outpostId}",
                            ""
                          ]
                        }
                      ],
                      "error": "OutpostId was empty",
                      "type": "error"
                    },
                    {
                      "conditions": [],
                      "endpoint": {
                        "url": "https://{outpostId}-{bucketArn#accountId}.{bucketArn#region}.{partitionResult#dnsSuffix}"
                      },
                      "type": "endpoint"
                    }
                  ],
                  "type": "tree"
                },
                {
                  "conditions": [],
                  "error": "Invalid ARN: outpostId was not set",
                  "type": "error"
                }
              ],
              "type": "tree"
            },
            {
              "documentation": "bucket can be used as a host label",
              "conditions": [
                {
                  "fn": "isValidHostLabel",
                  "argv": [
                    "{Bucket}",
                    false
                  ]
                }
              ],
              "endpoint": {
                "url": "https://{Bucket}.{Region}.amazonaws.com"
              },
              "type": "endpoint"
            },
            {
              "conditions": [],
              "documentation": "fallback: use bucket in the path",
              "endpoint": {
                "url": "https://{Region}.amazonaws.com/{Bucket}"
              },
              "type": "endpoint"
            }
          ],
          "type": "tree"
        },
        {
          "documentation": "region is set, bucket is not",
          "conditions": [],
          "endpoint": {
            "url": "https://{Region}.{partitionResult#dnsSuffix}"
          },
          "type": "endpoint"
        }
      ],
      "type": "tree"
    },
    {
      "documentation": "fallback when region is unset",
      "conditions": [],
      "error": "Region must be set to resolve a valid endpoint",
      "type": "error"
    }
  ]
}