{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "HookResult",
  "type": "object",
  "properties": {
    "commands": {
      "description": "Transactional commands, applied in order only when the callback succeeds.",
      "default": [],
      "type": "array",
      "items": {
        "$ref": "#/definitions/Command"
      }
    },
    "state": {
      "description": "JSON-serializable state shared by callbacks in this script; maximum 64 KiB.",
      "default": null
    }
  },
  "additionalProperties": false,
  "definitions": {
    "Command": {
      "oneOf": [
        {
          "description": "Add an enemy at an integer position in the original logical canvas.",
          "type": "object",
          "required": [
            "enemy",
            "op",
            "x",
            "y"
          ],
          "properties": {
            "enemy": {
              "type": "string"
            },
            "op": {
              "type": "string",
              "enum": [
                "spawn"
              ]
            },
            "x": {
              "type": "integer",
              "format": "int32"
            },
            "y": {
              "type": "integer",
              "format": "int32"
            }
          },
          "additionalProperties": false
        },
        {
          "type": "object",
          "required": [
            "op",
            "vx",
            "vy",
            "weapon",
            "x",
            "y"
          ],
          "properties": {
            "hostile": {
              "default": false,
              "type": "boolean"
            },
            "op": {
              "type": "string",
              "enum": [
                "projectile"
              ]
            },
            "vx": {
              "type": "integer",
              "format": "int32"
            },
            "vy": {
              "type": "integer",
              "format": "int32"
            },
            "weapon": {
              "type": "string"
            },
            "x": {
              "type": "integer",
              "format": "int32"
            },
            "y": {
              "type": "integer",
              "format": "int32"
            }
          },
          "additionalProperties": false
        },
        {
          "type": "object",
          "required": [
            "amount",
            "entity",
            "op"
          ],
          "properties": {
            "amount": {
              "type": "integer",
              "format": "int32"
            },
            "entity": {
              "description": "Enemy entity ID; zero addresses the player.",
              "type": "integer",
              "format": "uint64",
              "minimum": 0.0
            },
            "op": {
              "type": "string",
              "enum": [
                "damage"
              ]
            }
          },
          "additionalProperties": false
        },
        {
          "type": "object",
          "required": [
            "entity",
            "op"
          ],
          "properties": {
            "entity": {
              "type": "integer",
              "format": "uint64",
              "minimum": 0.0
            },
            "op": {
              "type": "string",
              "enum": [
                "despawn"
              ]
            }
          },
          "additionalProperties": false
        },
        {
          "type": "object",
          "required": [
            "entity",
            "op",
            "x",
            "y"
          ],
          "properties": {
            "entity": {
              "description": "Existing enemy entity ID.",
              "type": "integer",
              "format": "uint64",
              "minimum": 0.0
            },
            "op": {
              "type": "string",
              "enum": [
                "move"
              ]
            },
            "x": {
              "type": "integer",
              "format": "int32"
            },
            "y": {
              "type": "integer",
              "format": "int32"
            }
          },
          "additionalProperties": false
        },
        {
          "type": "object",
          "required": [
            "entity",
            "op",
            "vx",
            "vy"
          ],
          "properties": {
            "entity": {
              "type": "integer",
              "format": "uint64",
              "minimum": 0.0
            },
            "op": {
              "type": "string",
              "enum": [
                "velocity"
              ]
            },
            "vx": {
              "type": "integer",
              "format": "int32"
            },
            "vy": {
              "type": "integer",
              "format": "int32"
            }
          },
          "additionalProperties": false
        },
        {
          "type": "object",
          "required": [
            "count",
            "item",
            "op"
          ],
          "properties": {
            "count": {
              "type": "integer",
              "format": "uint32",
              "minimum": 0.0
            },
            "item": {
              "type": "string"
            },
            "op": {
              "type": "string",
              "enum": [
                "give_item"
              ]
            }
          },
          "additionalProperties": false
        },
        {
          "type": "object",
          "required": [
            "count",
            "item",
            "op"
          ],
          "properties": {
            "count": {
              "type": "integer",
              "format": "uint32",
              "minimum": 0.0
            },
            "item": {
              "type": "string"
            },
            "op": {
              "type": "string",
              "enum": [
                "consume_item"
              ]
            }
          },
          "additionalProperties": false
        },
        {
          "type": "object",
          "required": [
            "amount",
            "op"
          ],
          "properties": {
            "amount": {
              "type": "integer",
              "format": "int32"
            },
            "op": {
              "type": "string",
              "enum": [
                "credits"
              ]
            }
          },
          "additionalProperties": false
        },
        {
          "type": "object",
          "required": [
            "amount",
            "op"
          ],
          "properties": {
            "amount": {
              "type": "integer",
              "format": "int32"
            },
            "op": {
              "type": "string",
              "enum": [
                "shield"
              ]
            }
          },
          "additionalProperties": false
        },
        {
          "type": "object",
          "required": [
            "op",
            "x",
            "y"
          ],
          "properties": {
            "op": {
              "type": "string",
              "enum": [
                "effect"
              ]
            },
            "x": {
              "type": "integer",
              "format": "int32"
            },
            "y": {
              "type": "integer",
              "format": "int32"
            }
          },
          "additionalProperties": false
        },
        {
          "type": "object",
          "required": [
            "asset",
            "op"
          ],
          "properties": {
            "asset": {
              "type": "integer",
              "format": "uint32",
              "minimum": 0.0
            },
            "op": {
              "type": "string",
              "enum": [
                "sound"
              ]
            }
          },
          "additionalProperties": false
        },
        {
          "type": "object",
          "required": [
            "op",
            "sound"
          ],
          "properties": {
            "op": {
              "type": "string",
              "enum": [
                "play_sound"
              ]
            },
            "sound": {
              "type": "string"
            }
          },
          "additionalProperties": false
        },
        {
          "type": "object",
          "required": [
            "key",
            "op",
            "value"
          ],
          "properties": {
            "key": {
              "description": "Stable namespaced objective key, at most 128 bytes.",
              "type": "string"
            },
            "op": {
              "type": "string",
              "enum": [
                "objective"
              ]
            },
            "value": {
              "type": "integer",
              "format": "int32"
            }
          },
          "additionalProperties": false
        },
        {
          "type": "object",
          "required": [
            "op"
          ],
          "properties": {
            "op": {
              "type": "string",
              "enum": [
                "complete"
              ]
            }
          },
          "additionalProperties": false
        },
        {
          "type": "object",
          "required": [
            "op"
          ],
          "properties": {
            "op": {
              "type": "string",
              "enum": [
                "fail"
              ]
            }
          },
          "additionalProperties": false
        }
      ]
    }
  }
}