{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://fgmacedo.github.io/python-statemachine/schemas/statechart/v1.json",
  "title": "python-statemachine statechart",
  "description": "Declarative statechart definition for python-statemachine (JSON/YAML native format).",
  "type": "object",
  "required": ["states"],
  "properties": {
    "name": { "type": "string" },
    "description": { "type": "string" },
    "datamodel": {
      "oneOf": [
        { "type": "object", "additionalProperties": true },
        { "type": "array", "items": { "$ref": "#/$defs/dataItem" } }
      ]
    },
    "states": {
      "type": "object",
      "minProperties": 1,
      "additionalProperties": { "$ref": "#/$defs/state" }
    }
  },
  "additionalProperties": false,
  "$defs": {
    "flag": {
      "oneOf": [
        { "type": "boolean" },
        { "type": "string", "enum": ["true", "false", "yes", "no", "on", "off"] }
      ]
    },
    "guard": {
      "oneOf": [
        { "type": "string" },
        { "type": "array", "items": { "type": "string" } }
      ]
    },
    "dataItem": {
      "type": "object",
      "required": ["id"],
      "properties": {
        "id": { "type": "string" },
        "expr": { "type": "string" },
        "content": {},
        "src": { "type": "string" }
      },
      "additionalProperties": false
    },
    "param": {
      "type": "object",
      "required": ["name"],
      "properties": {
        "name": { "type": "string" },
        "expr": { "type": "string" },
        "location": { "type": "string" }
      },
      "additionalProperties": false
    },
    "structuredAction": {
      "type": "object",
      "minProperties": 1,
      "maxProperties": 1,
      "properties": {
        "assign": {
          "type": "object",
          "required": ["location"],
          "properties": {
            "location": { "type": "string" },
            "expr": { "type": "string" }
          },
          "additionalProperties": false
        },
        "raise": {
          "oneOf": [
            { "type": "string" },
            {
              "type": "object",
              "required": ["event"],
              "properties": { "event": { "type": "string" } },
              "additionalProperties": false
            }
          ]
        },
        "log": {
          "oneOf": [
            { "type": "string" },
            {
              "type": "object",
              "properties": {
                "label": { "type": "string" },
                "expr": { "type": "string" }
              },
              "additionalProperties": false
            }
          ]
        },
        "script": { "type": "string" },
        "cancel": {
          "type": "object",
          "properties": {
            "sendid": { "type": "string" },
            "sendidexpr": { "type": "string" }
          },
          "additionalProperties": false
        },
        "send": {
          "type": "object",
          "properties": {
            "event": { "type": "string" },
            "eventexpr": { "type": "string" },
            "target": { "type": "string" },
            "type": { "type": "string" },
            "id": { "type": "string" },
            "idlocation": { "type": "string" },
            "delay": { "type": "string" },
            "delayexpr": { "type": "string" },
            "namelist": { "type": "string" },
            "params": { "type": "array", "items": { "$ref": "#/$defs/param" } },
            "content": { "type": "string" }
          },
          "additionalProperties": false
        },
        "foreach": {
          "type": "object",
          "required": ["array", "item"],
          "properties": {
            "array": { "type": "string" },
            "item": { "type": "string" },
            "index": { "type": "string" },
            "do": { "$ref": "#/$defs/structuredActions" }
          },
          "additionalProperties": false
        },
        "if": {
          "type": "object",
          "required": ["cond"],
          "properties": {
            "cond": { "type": "string" },
            "then": { "$ref": "#/$defs/structuredActions" },
            "elif": {
              "type": "array",
              "items": {
                "type": "object",
                "required": ["cond"],
                "properties": {
                  "cond": { "type": "string" },
                  "then": { "$ref": "#/$defs/structuredActions" }
                },
                "additionalProperties": false
              }
            },
            "else": { "$ref": "#/$defs/structuredActions" }
          },
          "additionalProperties": false
        }
      },
      "additionalProperties": false
    },
    "action": {
      "oneOf": [
        { "type": "string" },
        { "$ref": "#/$defs/structuredAction" }
      ]
    },
    "actions": {
      "oneOf": [
        { "$ref": "#/$defs/action" },
        { "type": "array", "items": { "$ref": "#/$defs/action" } }
      ]
    },
    "structuredActions": {
      "oneOf": [
        { "$ref": "#/$defs/structuredAction" },
        { "type": "array", "items": { "$ref": "#/$defs/structuredAction" } }
      ]
    },
    "invoke": {
      "type": "object",
      "properties": {
        "type": { "type": "string" },
        "typeexpr": { "type": "string" },
        "src": { "type": "string" },
        "srcexpr": { "type": "string" },
        "id": { "type": "string" },
        "idlocation": { "type": "string" },
        "autoforward": { "$ref": "#/$defs/flag" },
        "namelist": { "type": "string" },
        "params": { "type": "array", "items": { "$ref": "#/$defs/param" } },
        "content": {
          "oneOf": [
            { "type": "string" },
            { "$ref": "#" }
          ]
        },
        "finalize": { "$ref": "#/$defs/structuredActions" }
      },
      "additionalProperties": false
    },
    "invokeList": {
      "oneOf": [
        { "$ref": "#/$defs/invoke" },
        { "type": "array", "items": { "$ref": "#/$defs/invoke" } }
      ]
    },
    "transition": {
      "type": "object",
      "properties": {
        "event": { "type": "string" },
        "target": { "type": "string" },
        "cond": { "$ref": "#/$defs/guard" },
        "unless": { "$ref": "#/$defs/guard" },
        "internal": { "$ref": "#/$defs/flag" },
        "initial": { "$ref": "#/$defs/flag" },
        "on": { "$ref": "#/$defs/actions" },
        "before": { "$ref": "#/$defs/actions" },
        "after": { "$ref": "#/$defs/actions" }
      },
      "additionalProperties": false
    },
    "history": {
      "type": "object",
      "properties": {
        "type": { "type": "string", "enum": ["shallow", "deep"] },
        "transitions": { "type": "array", "items": { "$ref": "#/$defs/transition" } }
      },
      "additionalProperties": false
    },
    "donedata": {
      "type": "object",
      "properties": {
        "params": { "type": "array", "items": { "$ref": "#/$defs/param" } },
        "content": { "type": "string" }
      },
      "additionalProperties": false
    },
    "state": {
      "type": "object",
      "properties": {
        "initial": { "$ref": "#/$defs/flag" },
        "final": { "$ref": "#/$defs/flag" },
        "parallel": { "$ref": "#/$defs/flag" },
        "enter": { "$ref": "#/$defs/actions" },
        "exit": { "$ref": "#/$defs/actions" },
        "transitions": { "type": "array", "items": { "$ref": "#/$defs/transition" } },
        "invoke": { "$ref": "#/$defs/invokeList" },
        "states": {
          "type": "object",
          "additionalProperties": { "$ref": "#/$defs/state" }
        },
        "history": {
          "type": "object",
          "additionalProperties": { "$ref": "#/$defs/history" }
        },
        "donedata": { "$ref": "#/$defs/donedata" }
      },
      "additionalProperties": false
    }
  }
}