{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://spec.umpire.tools/umpire.schema.json",
  "title": "Umpire JSON Schema",
  "description": "Validates .umpire.json files — the language-agnostic authoring surface for Umpire logic.",
  "type": "object",
  "properties": {
    "version": {
      "const": 1
    },
    "conditions": {
      "type": "object",
      "additionalProperties": {
        "$ref": "#/definitions/json-condition-def"
      }
    },
    "fields": {
      "type": "object",
      "minProperties": 1,
      "additionalProperties": {
        "$ref": "#/definitions/json-field-def"
      }
    },
    "rules": {
      "type": "array",
      "items": {
        "$ref": "#/definitions/json-rule"
      }
    },
    "validators": {
      "type": "object",
      "additionalProperties": {
        "$ref": "#/definitions/json-validator-def"
      }
    },
    "excluded": {
      "type": "array",
      "items": {
        "$ref": "#/definitions/excluded-rule"
      }
    }
  },
  "required": ["version", "fields", "rules"],
  "additionalProperties": false,

  "definitions": {
    "json-primitive": {
      "type": ["string", "number", "boolean", "null"]
    },

    "json-field-def": {
      "type": "object",
      "properties": {
        "required": { "type": "boolean" },
        "default": { "$ref": "#/definitions/json-primitive" },
        "isEmpty": {
          "enum": ["string", "number", "boolean", "array", "object", "present"]
        }
      },
      "additionalProperties": false
    },

    "json-condition-def": {
      "type": "object",
      "properties": {
        "type": {
          "enum": ["boolean", "string", "number", "string[]", "number[]"]
        },
        "description": { "type": "string" }
      },
      "required": ["type"],
      "additionalProperties": false
    },

    "json-validator-spec": {
      "oneOf": [
        {
          "type": "object",
          "properties": {
            "op": { "enum": ["email", "url", "integer"] }
          },
          "required": ["op"]
        },
        {
          "type": "object",
          "properties": {
            "op": { "const": "matches" },
            "pattern": { "type": "string" }
          },
          "required": ["op", "pattern"]
        },
        {
          "type": "object",
          "properties": {
            "op": { "enum": ["minLength", "maxLength", "min", "max"] },
            "value": { "type": "number" }
          },
          "required": ["op", "value"]
        },
        {
          "type": "object",
          "properties": {
            "op": { "const": "range" },
            "min": { "type": "number" },
            "max": { "type": "number" }
          },
          "required": ["op", "min", "max"]
        }
      ]
    },

    "json-validator-def": {
      "oneOf": [
        {
          "type": "object",
          "properties": {
            "op": { "enum": ["email", "url", "integer"] },
            "error": { "type": "string" }
          },
          "required": ["op"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "op": { "const": "matches" },
            "pattern": { "type": "string" },
            "error": { "type": "string" }
          },
          "required": ["op", "pattern"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "op": { "enum": ["minLength", "maxLength", "min", "max"] },
            "value": { "type": "number" },
            "error": { "type": "string" }
          },
          "required": ["op", "value"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "op": { "const": "range" },
            "min": { "type": "number" },
            "max": { "type": "number" },
            "error": { "type": "string" }
          },
          "required": ["op", "min", "max"],
          "additionalProperties": false
        }
      ]
    },

    "excluded-rule": {
      "type": "object",
      "properties": {
        "type": { "type": "string" },
        "field": { "type": "string" },
        "description": { "type": "string" },
        "key": { "type": "string" },
        "signature": { "type": "string" }
      },
      "required": ["type", "description"],
      "additionalProperties": false
    },

    "json-expr": {
      "oneOf": [
        {
          "type": "object",
          "properties": {
            "op": { "const": "eq" },
            "field": { "type": "string" },
            "value": { "$ref": "#/definitions/json-primitive" }
          },
          "required": ["op", "field", "value"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "op": { "const": "neq" },
            "field": { "type": "string" },
            "value": { "$ref": "#/definitions/json-primitive" }
          },
          "required": ["op", "field", "value"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "op": { "const": "gt" },
            "field": { "type": "string" },
            "value": { "type": "number" }
          },
          "required": ["op", "field", "value"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "op": { "const": "gte" },
            "field": { "type": "string" },
            "value": { "type": "number" }
          },
          "required": ["op", "field", "value"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "op": { "const": "lt" },
            "field": { "type": "string" },
            "value": { "type": "number" }
          },
          "required": ["op", "field", "value"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "op": { "const": "lte" },
            "field": { "type": "string" },
            "value": { "type": "number" }
          },
          "required": ["op", "field", "value"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "op": { "const": "present" },
            "field": { "type": "string" }
          },
          "required": ["op", "field"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "op": { "const": "absent" },
            "field": { "type": "string" }
          },
          "required": ["op", "field"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "op": { "const": "truthy" },
            "field": { "type": "string" }
          },
          "required": ["op", "field"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "op": { "const": "falsy" },
            "field": { "type": "string" }
          },
          "required": ["op", "field"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "op": { "const": "in" },
            "field": { "type": "string" },
            "values": {
              "type": "array",
              "items": { "$ref": "#/definitions/json-primitive" }
            }
          },
          "required": ["op", "field", "values"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "op": { "const": "notIn" },
            "field": { "type": "string" },
            "values": {
              "type": "array",
              "items": { "$ref": "#/definitions/json-primitive" }
            }
          },
          "required": ["op", "field", "values"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "op": { "const": "cond" },
            "condition": { "type": "string" }
          },
          "required": ["op", "condition"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "op": { "const": "condEq" },
            "condition": { "type": "string" },
            "value": { "$ref": "#/definitions/json-primitive" }
          },
          "required": ["op", "condition", "value"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "op": { "const": "condIn" },
            "condition": { "type": "string" },
            "values": {
              "type": "array",
              "items": { "$ref": "#/definitions/json-primitive" }
            }
          },
          "required": ["op", "condition", "values"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "op": { "const": "fieldInCond" },
            "field": { "type": "string" },
            "condition": { "type": "string" }
          },
          "required": ["op", "field", "condition"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "op": { "const": "and" },
            "exprs": {
              "type": "array",
              "items": { "$ref": "#/definitions/json-expr" }
            }
          },
          "required": ["op", "exprs"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "op": { "const": "or" },
            "exprs": {
              "type": "array",
              "items": { "$ref": "#/definitions/json-expr" }
            }
          },
          "required": ["op", "exprs"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "op": { "const": "not" },
            "expr": { "$ref": "#/definitions/json-expr" }
          },
          "required": ["op", "expr"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "op": { "const": "check" },
            "field": { "type": "string" },
            "check": { "$ref": "#/definitions/json-validator-spec" }
          },
          "required": ["op", "field", "check"],
          "additionalProperties": false
        }
      ]
    },

    "json-requires-dependency": {
      "oneOf": [
        { "type": "string" },
        { "$ref": "#/definitions/json-expr" }
      ]
    },

    "json-rule": {
      "oneOf": [
        {
          "type": "object",
          "properties": {
            "type": { "const": "requires" },
            "field": { "type": "string" },
            "dependency": { "type": "string" },
            "reason": { "type": "string" }
          },
          "required": ["type", "field", "dependency"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "type": { "const": "requires" },
            "field": { "type": "string" },
            "dependencies": {
              "type": "array",
              "items": { "$ref": "#/definitions/json-requires-dependency" }
            },
            "reason": { "type": "string" }
          },
          "required": ["type", "field", "dependencies"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "type": { "const": "requires" },
            "field": { "type": "string" },
            "when": { "$ref": "#/definitions/json-expr" },
            "reason": { "type": "string" }
          },
          "required": ["type", "field", "when"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "type": { "const": "enabledWhen" },
            "field": { "type": "string" },
            "when": { "$ref": "#/definitions/json-expr" },
            "reason": { "type": "string" }
          },
          "required": ["type", "field", "when"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "type": { "const": "disables" },
            "source": { "type": "string" },
            "targets": {
              "type": "array",
              "items": { "type": "string" }
            },
            "reason": { "type": "string" }
          },
          "required": ["type", "source", "targets"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "type": { "const": "disables" },
            "when": { "$ref": "#/definitions/json-expr" },
            "targets": {
              "type": "array",
              "items": { "type": "string" }
            },
            "reason": { "type": "string" }
          },
          "required": ["type", "when", "targets"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "type": { "const": "oneOf" },
            "group": { "type": "string" },
            "branches": {
              "type": "object",
              "additionalProperties": {
                "type": "array",
                "items": { "type": "string" }
              }
            }
          },
          "required": ["type", "group", "branches"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "type": { "const": "eitherOf" },
            "group": { "type": "string" },
            "branches": {
              "type": "object",
              "additionalProperties": {
                "type": "array",
                "items": { "$ref": "#/definitions/json-rule" }
              }
            }
          },
          "required": ["type", "group", "branches"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "type": { "const": "fairWhen" },
            "field": { "type": "string" },
            "when": { "$ref": "#/definitions/json-expr" },
            "reason": { "type": "string" }
          },
          "required": ["type", "field", "when"],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "type": { "const": "anyOf" },
            "rules": {
              "type": "array",
              "items": { "$ref": "#/definitions/json-rule" }
            }
          },
          "required": ["type", "rules"],
          "additionalProperties": false
        },
        {
          "oneOf": [
            {
              "type": "object",
              "properties": {
                "type": { "const": "check" },
                "field": { "type": "string" },
                "reason": { "type": "string" },
                "op": { "enum": ["email", "url", "integer"] }
              },
              "required": ["type", "field", "op"],
              "additionalProperties": false
            },
            {
              "type": "object",
              "properties": {
                "type": { "const": "check" },
                "field": { "type": "string" },
                "reason": { "type": "string" },
                "op": { "const": "matches" },
                "pattern": { "type": "string" }
              },
              "required": ["type", "field", "op", "pattern"],
              "additionalProperties": false
            },
            {
              "type": "object",
              "properties": {
                "type": { "const": "check" },
                "field": { "type": "string" },
                "reason": { "type": "string" },
                "op": { "enum": ["minLength", "maxLength", "min", "max"] },
                "value": { "type": "number" }
              },
              "required": ["type", "field", "op", "value"],
              "additionalProperties": false
            },
            {
              "type": "object",
              "properties": {
                "type": { "const": "check" },
                "field": { "type": "string" },
                "reason": { "type": "string" },
                "op": { "const": "range" },
                "min": { "type": "number" },
                "max": { "type": "number" }
              },
              "required": ["type", "field", "op", "min", "max"],
              "additionalProperties": false
            }
          ]
        }
      ]
    }
  }
}