from __future__ import annotations


def build_assistant_summary(*, batch_no: str, exports: list[dict], failed_files: list[dict]) -> str:
    zip_exports = [item for item in exports if item.get("export_type") == "zip" or str(item.get("file_name", "")).endswith(".zip")]
    other_exports = [item for item in exports if item not in zip_exports]
    lines = [f"已完成第1章监管信息材料包生成，批次号：{batch_no}。", ""]
    for export in [*zip_exports, *other_exports]:
        lines.append(f"- [{export['file_name']}]({export['download_url']})")
    for failed in failed_files:
        lines.append(f"- {failed.get('file_name')}：生成失败，{failed.get('error_message') or '原因待查看'}")
    return "\n".join(lines)