// Shared types for Decart gRPC inference services.
//
// Service-specific protos (v2v, etc.) import
// from here so that enum values stay consistent across protocols.
syntax = "proto3";
package decart.inference.common;

option go_package = "github.com/decart/api/inference/common";

enum ErrorCode {
  ERROR_CODE_UNSPECIFIED = 0;

  // Lifecycle errors
  ERROR_CODE_INVALID_SESSION = 1;      // session_id not found or expired
  ERROR_CODE_ALREADY_FINISHED = 2;     // Session already finished

  // Request validation
  ERROR_CODE_INVALID_REQUEST = 3;
  ERROR_CODE_INVALID_MODEL = 4;
  ERROR_CODE_INVALID_FORMAT = 5;
  ERROR_CODE_INVALID_ENVIRONMENTS = 6;

  // Prompt
  ERROR_CODE_PROMPT_SET = 7;

  // Client SDK version not supported by the server.
  ERROR_CODE_UNSUPPORTED_SDK_VERSION = 8;

  // API key missing or invalid.
  ERROR_CODE_INVALID_API_KEY = 9;
}

enum FrameFormat {
  FRAME_FORMAT_UNSPECIFIED = 0;
  FRAME_FORMAT_JPEG = 1;
  FRAME_FORMAT_H264 = 2;
  FRAME_FORMAT_VP9 = 3;
  FRAME_FORMAT_VP8 = 4;
  FRAME_FORMAT_RAW_YUV420 = 5;  // Uncompressed YUV420p (I420): Y + U + V planes, w*h*1.5 bytes
}

message Error {
  ErrorCode code = 1;
  string message = 2;
  map<string, string> details = 3;
}