{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "title": "Algorithm common components descriptor",
  "description": "This schema defines the components used in one or more versions of the Algorithm",

  "definitions": {

    "endpoint": {
      "type": "object",
      "properties": {
        "type": { "$ref": "../common/1.json#/definitions/reference" },
        "description": { "type": "string" }
      },
      "required": [
        "type"
      ],
      "additionalProperties": false
    },

    "endpoints": {
      "type": "object",
      "patternProperties": {
        "^[a-zA-Z_][a-zA-Z0-9_-]*$": {
          "$ref": "#/definitions/endpoint"
        }
      },
      "uniqueItems": true,
      "additionalProperties": false,
      "minProperties": 1
    },

    "io_group": {
      "type": "object",
      "properties": {
        "name": { "type": "string" },
        "inputs": { "$ref": "#/definitions/endpoints" },
        "outputs": { "$ref": "#/definitions/endpoints" }
      },
      "required": [
        "inputs",
        "outputs"
      ],
      "additionalProperties": false
    },

    "input_group": {
      "type": "object",
      "properties": {
        "name": { "type": "string" },
        "inputs": { "$ref": "#/definitions/endpoints" }
      },
      "required": [
        "inputs"
      ],
      "additionalProperties": false
    },

    "block_groups": {
      "type": "array",
      "items": [
        { "$ref": "#/definitions/io_group" }
      ],
      "additionalItems": { "$ref": "#/definitions/input_group" },
      "minItems": 1
    },

    "range": {
      "type": "array",
      "items": { "$ref": "../common/1.json#/definitions/value" },
      "minItems": 2,
      "maxItems": 2
    },

    "choice": {
      "type": "array",
      "items": { "$ref": "../common/1.json#/definitions/value" },
      "minItems": 3
    },

    "parameter": {
      "type": "object",
      "properties": {
        "type": { "$ref": "../common/1.json#/definitions/basetype" },
        "default": { "$ref": "../common/1.json#/definitions/value" },
        "description": { "type": "string" }
      },
      "required": [
        "type"
      ]
    },

    "range_parameter": {
      "allOf": [
        { "$ref": "#/definitions/parameter" },
        {
          "properties": {
            "range": { "$ref": "#/definitions/range" }
          },
          "required": [
            "range"
          ]
        }
      ],
      "additionalProperties": false
    },

    "choice_parameter": {
      "allOf": [
        { "$ref": "#/definitions/parameter" },
        {
          "properties": {
            "range": { "$ref": "#/definitions/choice" }
          },
          "required": [
            "choice"
          ]
        }
      ],
      "additionalProperties": false
    },

    "parameters": {
      "type": "object",
      "patternProperties": {
        "^[a-zA-Z_][a-zA-Z0-9_-]*$": {
          "oneOf": [
            { "$ref": "#/definitions/parameter" },
            { "$ref": "#/definitions/range_parameter" },
            { "$ref": "#/definitions/choice_parameter" }
          ]
        }
      },
      "uniqueItems": true,
      "additionalProperties": false
    },

    "analyzer_groups": {
      "type": "array",
      "items": { "$ref": "#/definitions/input_group" },
      "minItems": 1
    },

    "resulttype": {
      "oneOf": [
        { "type": "string", "enum": [ "int32", "float32", "bool", "string" ] },
        { "type": "string", "pattern": "^system/[a-zA-Z0-9_-]+/[0-9]+$" },
        { "type": "string", "pattern": "^plot/[a-zA-Z0-9_-]+/[0-9]+$" }
      ]
    },

    "result": {
      "type": "object",
      "properties": {
        "type": { "$ref": "#/definitions/resulttype" },
        "display": { "type": "boolean" },
        "description": { "type": "string" }
      },
      "required": [
        "type"
      ],
      "additionalProperties": false
    },

    "results": {
      "type": "object",
      "patternProperties": {
        "^[a-zA-Z_][a-zA-Z0-9_-]*$": {
          "$ref": "#/definitions/result"
        }
      },
      "uniqueItems": true,
      "additionalProperties": false,
      "minProperties": 1
    },

    "schema_version": { "$ref": "../common/1.json#/definitions/version" },
    "api_version": { "$ref": "../common/1.json#/definitions/version" }
  }
}