{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/apv022/mcf-spec/master/schemas/1.1/activity.schema.json",
  "title": "MCF 1.1 activity header",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "type",
    "id"
  ],
  "properties": {
    "type": {
      "enum": [
        "notes",
        "practice",
        "assessment",
        "assignment"
      ]
    },
    "id": {
      "$ref": "common.schema.json#/$defs/id"
    },
    "title": {
      "$ref": "common.schema.json#/$defs/nonEmptyString"
    },
    "description": {
      "type": "string"
    },
    "subjects": {
      "type": "array",
      "minItems": 1,
      "uniqueItems": true,
      "items": {
        "$ref": "common.schema.json#/$defs/nonEmptyString"
      }
    },
    "keywords": {
      "type": "array",
      "minItems": 1,
      "uniqueItems": true,
      "items": {
        "$ref": "common.schema.json#/$defs/nonEmptyString"
      }
    },
    "estimated_duration": {
      "$ref": "common.schema.json#/$defs/duration"
    },
    "learning_outcomes": {
      "type": "array",
      "items": {
        "$ref": "common.schema.json#/$defs/learningOutcome"
      }
    },
    "passing_score": {
      "type": "number",
      "minimum": 0,
      "maximum": 1
    },
    "randomize": {
      "type": "boolean"
    },
    "question_pool_size": {
      "type": "integer",
      "minimum": 1
    },
    "evaluation": {
      "enum": [
        "automatic",
        "manual",
        "completion",
        "ungraded"
      ]
    },
    "submission": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "modes"
      ],
      "properties": {
        "modes": {
          "type": "array",
          "minItems": 1,
          "uniqueItems": true,
          "items": {
            "enum": [
              "text",
              "file",
              "url"
            ]
          }
        },
        "minimum_files": {
          "type": "integer",
          "minimum": 0
        },
        "maximum_files": {
          "type": "integer",
          "minimum": 1
        },
        "accepted_media_types": {
          "type": "array",
          "minItems": 1,
          "uniqueItems": true,
          "items": {
            "type": "string",
            "pattern": "^[A-Za-z0-9!#$&^_.+*-]+/[A-Za-z0-9!#$&^_.+*-]+$"
          }
        },
        "maximum_file_size": {
          "type": "integer",
          "minimum": 1
        }
      }
    },
    "rubric": {
      "$ref": "common.schema.json#/$defs/id"
    },
    "extensions": {
      "$ref": "common.schema.json#/$defs/extensions"
    }
  },
  "allOf": [
    {
      "if": {
        "properties": {
          "type": {
            "const": "notes"
          }
        },
        "required": [
          "type"
        ]
      },
      "then": {
        "properties": {
          "evaluation": {
            "const": "ungraded"
          }
        },
        "not": {
          "anyOf": [
            {
              "required": [
                "submission"
              ]
            },
            {
              "required": [
                "rubric"
              ]
            },
            {
              "required": [
                "passing_score"
              ]
            },
            {
              "required": [
                "randomize"
              ]
            },
            {
              "required": [
                "question_pool_size"
              ]
            }
          ]
        }
      }
    },
    {
      "if": {
        "properties": {
          "type": {
            "const": "practice"
          }
        },
        "required": [
          "type"
        ]
      },
      "then": {
        "properties": {
          "evaluation": {
            "enum": [
              "automatic",
              "manual",
              "completion",
              "ungraded"
            ]
          }
        },
        "not": {
          "anyOf": [
            {
              "required": [
                "submission"
              ]
            },
            {
              "required": [
                "rubric"
              ]
            },
            {
              "required": [
                "passing_score"
              ]
            }
          ]
        }
      }
    },
    {
      "if": {
        "properties": {
          "type": {
            "const": "assessment"
          }
        },
        "required": [
          "type"
        ]
      },
      "then": {
        "properties": {
          "evaluation": {
            "enum": [
              "automatic",
              "manual",
              "completion"
            ]
          }
        },
        "not": {
          "anyOf": [
            {
              "required": [
                "submission"
              ]
            },
            {
              "required": [
                "rubric"
              ]
            }
          ]
        }
      }
    },
    {
      "if": {
        "properties": {
          "type": {
            "const": "assignment"
          }
        },
        "required": [
          "type"
        ]
      },
      "then": {
        "required": [
          "submission"
        ],
        "properties": {
          "evaluation": {
            "enum": [
              "manual",
              "completion",
              "ungraded"
            ]
          }
        },
        "not": {
          "anyOf": [
            {
              "required": [
                "passing_score"
              ]
            },
            {
              "required": [
                "randomize"
              ]
            },
            {
              "required": [
                "question_pool_size"
              ]
            }
          ]
        }
      }
    }
  ]
}