{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://wanxiang.ai/contracts/play-loop/game-event.schema.json",
  "title": "GameEvent",
  "description": "playtest/2 与 playtest/3 共用的版本化业务事件。ctx.log 诊断不属于本契约；只有 ctx.event 产生的 native 事件和 historical_replay 明确适配的 legacy 事件可以进入业务证据流。playtest/3 可追加 eventRole 区分当前 profile proof 与跨 profile observation。",
  "type": "object",
  "required": [
    "eventVersion", "evidenceMode", "scope", "namespace", "type", "message", "payload",
    "payloadCanonical", "payloadHash", "producer", "seq", "actionId", "virtualTimeMs", "sourceEventVersion",
    "adapterVersion", "sourceMessageHash"
  ],
  "properties": {
    "eventVersion": { "const": "game-event/1" },
    "evidenceMode": { "enum": ["native", "legacy-adapted"] },
    "scope": { "const": "game" },
    "namespace": { "type": "string", "pattern": "^game/[a-z][a-z0-9-]*\\.[a-z][a-z0-9-]*$" },
    "type": { "$ref": "#/$defs/eventType" },
    "eventRole": {
      "enum": ["profile-proof", "cross-profile-observation"],
      "description": "playtest/3 运行时分类。当前 proof profile 事件可参与义务候选；其它已注册 profile 事件只供 Judge 观察，不能满足义务。"
    },
    "message": { "type": "string" },
    "payload": { "type": "object" },
    "payloadCanonical": {
      "type": "string",
      "minLength": 2,
      "maxLength": 65536,
      "description": "Node runner 的 stableStringify(payload) 原文；payloadHash 只对这段 UTF-8 文本取 SHA-256，跨语言消费者不得重序列化浮点复算。"
    },
    "payloadHash": { "$ref": "#/$defs/sha256" },
    "producer": { "type": "string", "minLength": 1 },
    "seq": { "type": "integer", "minimum": 1 },
    "actionId": { "type": "string", "pattern": "^action-[1-9][0-9]*$" },
    "virtualTimeMs": { "type": "integer", "minimum": 0 },
    "sourceEventVersion": { "type": ["string", "null"] },
    "adapterVersion": { "type": ["string", "null"] },
    "sourceMessageHash": {
      "anyOf": [
        { "$ref": "#/$defs/sha256" },
        { "type": "null" }
      ]
    }
  },
  "patternProperties": { "^_": {} },
  "additionalProperties": false,
  "allOf": [
    {
      "if": {
        "properties": { "evidenceMode": { "const": "native" } },
        "required": ["evidenceMode"]
      },
      "then": {
        "properties": {
          "sourceEventVersion": { "type": "null" },
          "adapterVersion": { "type": "null" },
          "sourceMessageHash": { "type": "null" }
        }
      },
      "else": {
        "properties": {
          "sourceEventVersion": { "const": "legacy-game-log/1" },
          "adapterVersion": { "type": "string", "minLength": 1 },
          "sourceMessageHash": { "$ref": "#/$defs/sha256" }
        }
      }
    },
    {
      "if": {
        "properties": { "type": { "const": "puzzle.swap-committed" } },
        "required": ["type"]
      },
      "then": { "properties": { "payload": { "$ref": "#/$defs/swapCommittedPayload" } } }
    },
    {
      "if": {
        "properties": { "type": { "const": "puzzle.match-formed" } },
        "required": ["type"]
      },
      "then": { "properties": { "payload": { "$ref": "#/$defs/matchFormedPayload" } } }
    }
  ],
  "$defs": {
    "eventType": {
      "type": "string",
      "pattern": "^[a-z][a-z0-9-]*\\.[a-z][a-z0-9-]*$"
    },
    "sha256": {
      "type": "string",
      "pattern": "^[0-9a-f]{64}$"
    },
    "cell": {
      "type": "object",
      "required": ["row", "column"],
      "properties": {
        "row": { "type": "integer", "minimum": 1, "maximum": 12 },
        "column": { "type": "integer", "minimum": 1, "maximum": 12 }
      },
      "additionalProperties": false
    },
    "pair": {
      "type": "array", "minItems": 2, "maxItems": 2,
      "items": { "$ref": "#/$defs/cell" }
    },
    "swapCommittedPayload": {
      "type": "object",
      "required": ["moveId", "pair", "boardRevisionBefore", "boardRevisionAfter"],
      "properties": {
        "moveId": { "type": "string", "minLength": 1 },
        "pair": { "$ref": "#/$defs/pair" },
        "boardRevisionBefore": { "type": "integer", "minimum": 0 },
        "boardRevisionAfter": { "type": "integer", "minimum": 1 }
      },
      "additionalProperties": false
    },
    "matchRun": {
      "type": "object",
      "required": ["axis", "cells"],
      "properties": {
        "axis": { "enum": ["horizontal", "vertical"] },
        "cells": {
          "type": "array", "minItems": 3, "maxItems": 12,
          "items": { "$ref": "#/$defs/cell" }
        }
      },
      "additionalProperties": false
    },
    "matchFormedPayload": {
      "type": "object",
      "required": ["moveId", "runs", "matchedCells", "matchedCount"],
      "properties": {
        "moveId": { "type": "string", "minLength": 1 },
        "runs": {
          "type": "array", "minItems": 1, "maxItems": 8,
          "items": { "$ref": "#/$defs/matchRun" }
        },
        "matchedCells": {
          "type": "array", "minItems": 3, "maxItems": 144,
          "items": { "$ref": "#/$defs/cell" }
        },
        "matchedCount": { "type": "integer", "minimum": 3, "maximum": 144 }
      },
      "additionalProperties": false
    }
  }
}