syntax = "proto3";

package sensor_stream;

// 传感器数据推送服务 —— Rust 端作为 gRPC client 推送实时帧
service SensorPush {
  rpc Upload (stream SensorFrame) returns (UploadResponse);
}

// 导出后处理服务 —— Rust 导出 CSV 后将路径发给 Python 做梯度过滤
service ExportProcessor {
  rpc ProcessFile (ProcessRequest) returns (ProcessResponse);
}

// 一帧传感器数据
message SensorFrame {
  uint64 seq = 1;
  uint64 timestamp_ms = 2;
  uint32 rows = 3;
  uint32 cols = 4;
  repeated uint32 matrix = 5;
  double resultant_force = 6;
  uint32 dts_ms = 7;
}

// 上传确认响应
message UploadResponse {
  bool ok = 1;
  uint64 frames_received = 2;
  string message = 3;
}

// 导出处理请求
message ProcessRequest {
  string csv_path = 1;        // 导出的 CSV 文件路径
  bool save_as_xlsx = 2;      // 是否以 xlsx 保存（删除源 CSV）
}

// 导出处理响应
message ProcessResponse {
  bool ok = 1;
  string output_path = 2;     // 输出文件路径
  uint32 groups_used = 3;     // 分组数
  double mean_value = 4;      // 均值
  double threshold = 5;       // 梯度阈值
  uint32 rows_total = 6;      // 原始行数
  uint32 rows_kept = 7;       // 保留行数
  string message = 8;
}