SUPPORT_OUTPUT_SCHEMA = {
    "type": "object",
    "properties": {
        "analysis_summary": {"type": "string"},
        "troubleshooting_steps": {
            "type": "array",
            "items": {"type": "string"},
            "maxItems": 12,
        },
        "candidate_solution_ids": {
            "type": "array",
            "items": {"type": "integer"},
        },
        "customer_reply_draft": {"type": "string"},
        "citations": {
            "type": "array",
            "items": {"type": "integer", "minimum": 1},
        },
        "auto_resolve_recommended": {"type": "boolean"},
    },
    "required": [
        "analysis_summary",
        "troubleshooting_steps",
        "candidate_solution_ids",
        "customer_reply_draft",
        "citations",
        "auto_resolve_recommended",
    ],
    "additionalProperties": False,
}

SUPPORT_OUTPUT_FIELDS = frozenset(SUPPORT_OUTPUT_SCHEMA["required"])


def missing_support_output_fields(output_schema) -> list[str]:
    if not isinstance(output_schema, dict) or output_schema.get("type") != "object":
        return sorted(SUPPORT_OUTPUT_FIELDS)

    required = output_schema.get("required")
    properties = output_schema.get("properties")
    required_fields = set(required) if isinstance(required, list) else set()
    property_fields = set(properties) if isinstance(properties, dict) else set()
    return sorted(
        (SUPPORT_OUTPUT_FIELDS - required_fields)
        | (SUPPORT_OUTPUT_FIELDS - property_fields)
    )