{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://github.com/LucioLiu/handoff-protocol/contracts/closure-receipt.schema.json",
  "title": "Closure receipt",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "handoff_id",
    "contract_id",
    "dispatch_id",
    "target",
    "status",
    "writer"
  ],
  "properties": {
    "handoff_id": {"type": "string", "minLength": 1},
    "contract_id": {"type": "string", "minLength": 1},
    "dispatch_id": {"type": "string", "minLength": 1},
    "target": {
      "enum": ["employee_memory", "employee_worklog", "team_journal", "central_board"]
    },
    "status": {"enum": ["updated", "proposed_for_parent", "not_applicable"]},
    "writer": {"enum": ["recipient", "parent", "single_writer", "none"]},
    "path": {"type": "string", "minLength": 1},
    "reason": {"type": "string", "minLength": 1},
    "evidence": {
      "type": "object",
      "additionalProperties": false,
      "required": ["kind", "value", "evidence_anchor"],
      "properties": {
        "kind": {"enum": ["content_anchor", "sha256", "provider_receipt", "proposal"]},
        "value": {"type": "string", "minLength": 1},
        "evidence_anchor": {"type": "string", "minLength": 1},
        "exit_code": {"type": "integer"},
        "event_id": {"type": "string", "minLength": 1},
        "append_position": {"type": "integer", "minimum": 0},
        "timestamp": {"type": "string", "format": "date-time"},
        "provider": {"type": "object", "minProperties": 1}
      }
    }
  },
  "allOf": [
    {
      "if": {
        "properties": {"status": {"enum": ["updated", "proposed_for_parent"]}},
        "required": ["status"]
      },
      "then": {"required": ["path", "evidence"]}
    },
    {
      "if": {
        "properties": {"status": {"const": "not_applicable"}},
        "required": ["status"]
      },
      "then": {
        "properties": {"writer": {"const": "none"}},
        "required": ["reason"],
        "not": {
          "anyOf": [
            {"required": ["path"]},
            {"required": ["evidence"]}
          ]
        }
      }
    },
    {
      "if": {
        "properties": {
          "target": {
            "enum": ["employee_memory", "employee_worklog"]
          },
          "status": {"const": "updated"}
        },
        "required": ["target", "status"]
      },
      "then": {
        "properties": {
          "writer": {"const": "recipient"},
          "evidence": {
            "properties": {
              "kind": {"enum": ["content_anchor", "sha256"]}
            }
          }
        }
      }
    },
    {
      "if": {
        "properties": {"status": {"const": "proposed_for_parent"}},
        "required": ["status"]
      },
      "then": {
        "properties": {
          "target": {"const": "central_board"},
          "writer": {"const": "recipient"},
          "evidence": {
            "properties": {"kind": {"const": "proposal"}},
            "required": ["kind", "value", "evidence_anchor"]
          }
        }
      }
    },
    {
      "if": {
        "properties": {
          "target": {"const": "central_board"}
        },
        "required": ["target"]
      },
      "then": {
        "properties": {
          "status": {"enum": ["proposed_for_parent", "not_applicable"]}
        }
      }
    },
    {
      "if": {
        "properties": {
          "target": {"const": "team_journal"},
          "status": {"const": "updated"}
        },
        "required": ["target", "status"]
      },
      "then": {
        "properties": {
          "writer": {"const": "recipient"},
          "evidence": {
            "properties": {
              "kind": {"const": "provider_receipt"},
              "exit_code": {"const": 0}
            },
            "required": [
              "kind",
              "value",
              "evidence_anchor",
              "exit_code",
              "event_id",
              "append_position",
              "timestamp",
              "provider"
            ]
          }
        }
      }
    },
    {
      "if": {
        "properties": {
          "evidence": {
            "properties": {"kind": {"const": "sha256"}},
            "required": ["kind"]
          }
        },
        "required": ["evidence"]
      },
      "then": {
        "properties": {
          "evidence": {
            "properties": {
              "value": {"pattern": "^[a-f0-9]{64}$"}
            }
          }
        }
      }
    }
  ]
}