{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://github.com/tt-a1i/archify/schemas/sequence.schema.json",
  "title": "Archify Sequence Diagram",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "schema_version",
    "diagram_type",
    "meta",
    "participants",
    "messages"
  ],
  "properties": {
    "schema_version": {
      "const": 1
    },
    "diagram_type": {
      "const": "sequence"
    },
    "meta": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "title"
      ],
      "properties": {
        "title": {
          "type": "string",
          "minLength": 1
        },
        "locale": {
          "$ref": "common.schema.json#/$defs/locale"
        },
        "subtitle": {
          "type": "string"
        },
        "output": {
          "type": "string"
        },
        "animation": {
          "$ref": "common.schema.json#/$defs/animation"
        },
        "visual_preset": {
          "$ref": "common.schema.json#/$defs/visualPreset"
        },
        "quality_profile": {
          "$ref": "common.schema.json#/$defs/qualityProfile"
        },
        "column_fit": {
          "description": "Horizontal participant layout. Omit this field or use fixed for the stable 86px boxes and 108px gap. Use spread when a wide viewBox would leave unused horizontal space or meaningful participant labels do not fit the fixed boxes; spread derives wider boxes and gaps from the viewBox without changing participant order or message semantics.",
          "enum": ["fixed", "spread"]
        },
        "views": {
          "$ref": "common.schema.json#/$defs/guidedViews"
        },
        "legend": {
          "type": "object",
          "additionalProperties": false,
          "properties": {
            "mode": { "$ref": "common.schema.json#/$defs/legendMode" },
            "entries": {
              "type": "object",
              "additionalProperties": false,
              "properties": {
                "default": { "$ref": "common.schema.json#/$defs/legendEntry" },
                "emphasis": { "$ref": "common.schema.json#/$defs/legendEntry" },
                "security": { "$ref": "common.schema.json#/$defs/legendEntry" },
                "dashed": { "$ref": "common.schema.json#/$defs/legendEntry" },
                "return": { "$ref": "common.schema.json#/$defs/legendEntry" }
              }
            }
          }
        },
        "viewBox": {
          "type": "array",
          "prefixItems": [
            {
              "type": "number",
              "minimum": 480
            },
            {
              "type": "number",
              "minimum": 480
            }
          ],
          "items": false,
          "minItems": 2,
          "maxItems": 2
        }
      }
    },
    "participants": {
      "type": "array",
      "minItems": 2,
      "items": {
        "type": "object",
        "additionalProperties": false,
        "required": [
          "id",
          "type",
          "label"
        ],
        "properties": {
          "id": {
            "$ref": "common.schema.json#/$defs/id"
          },
          "type": {
            "$ref": "common.schema.json#/$defs/componentType"
          },
          "label": {
            "type": "string",
            "minLength": 1
          },
          "sublabel": {
            "type": "string"
          },
          "brand": {
            "$ref": "common.schema.json#/$defs/brandMark"
          }
        }
      }
    },
    "segments": {
      "type": "array",
      "items": {
        "type": "object",
        "additionalProperties": false,
        "required": [
          "from",
          "to",
          "label"
        ],
        "properties": {
          "from": {
            "type": "number"
          },
          "to": {
            "type": "number"
          },
          "label": {
            "type": "string",
            "minLength": 1
          }
        }
      }
    },
    "messages": {
      "type": "array",
      "minItems": 1,
      "items": {
        "type": "object",
        "additionalProperties": false,
        "required": [
          "from",
          "to",
          "y",
          "label"
        ],
        "properties": {
          "id": {
            "$ref": "common.schema.json#/$defs/id"
          },
          "from": {
            "$ref": "common.schema.json#/$defs/id"
          },
          "to": {
            "$ref": "common.schema.json#/$defs/id"
          },
          "y": {
            "type": "number",
            "minimum": 160
          },
          "label": {
            "type": "string",
            "minLength": 1
          },
          "variant": {
            "enum": [
              "default",
              "emphasis",
              "security",
              "dashed",
              "return"
            ]
          },
          "note": {
            "type": "string"
          }
        }
      }
    },
    "activations": {
      "type": "array",
      "items": {
        "type": "object",
        "additionalProperties": false,
        "required": [
          "participant",
          "from",
          "to"
        ],
        "properties": {
          "participant": {
            "$ref": "common.schema.json#/$defs/id"
          },
          "from": {
            "type": "number"
          },
          "to": {
            "type": "number"
          },
          "type": {
            "$ref": "common.schema.json#/$defs/componentType"
          }
        }
      }
    },
    "cards": {
      "$ref": "common.schema.json#/$defs/cards"
    }
  }
}