syntax = "proto3";

package alox;

enum MessageType {
  UNKNOWN = 0;
  ACK = 1;
  ECHO = 2;
  VERSION = 3;
  CLIENT_INFO = 4;
  CLIENT_INPUT = 5;
  ACCEL_DEADZONE = 6;
  ESPNOW_UNICAST_TEST = 7;
  OTA_START = 16;
  OTA_PAYLOAD = 17;
  OTA_END = 18;
  OTA_STATUS = 19;
  OTA_START_ESPNOW = 20;
}

message UartMessage {
  MessageType type = 1;
  oneof payload {
    Ack ack_payload = 2;
    EchoPayload echo_payload = 3;
    VersionResponse version_response = 4;
    ClientInfoResponse client_info_response = 5;
    ClientInputResponse client_input_response = 6;
    OtaStartPayload ota_start = 7;
    OtaPayload ota_payload = 8;
    OtaEndPayload ota_end = 9;
    OtaStatusPayload ota_status = 10;
    AccelDeadzoneRequest accel_deadzone_request = 11;
    AccelDeadzoneResponse accel_deadzone_response = 12;
    EspNowUnicastTestRequest espnow_unicast_test_request = 13;
    EspNowUnicastTestResponse espnow_unicast_test_response = 14;
  }
}

message Ack {}

message EchoPayload { 
  bytes data = 1; 
}

message VersionResponse {
  uint32 version = 1;
  string git_hash = 2;
}

message ClientInfo {
  uint32 id = 1;
  bool available = 2;
  bool used = 3;
  bytes mac = 4; 
  uint32 last_ping = 5;
  uint32 last_success_ping = 6;
  uint32 version = 7;
}

message ClientInfoResponse { 
  repeated ClientInfo clients = 1; 
}

message ClientInput {
  uint32 id = 1;
  float lage_x = 2;
  float lage_y = 3;
  uint32 bitmask = 4;
}

message ClientInputResponse { 
  repeated ClientInput clients = 1; 
}

// write=false: read deadzone; write=true: apply deadzone (LSB per axis, raw accel units).
// client_id 0 = local BMA456 on this node; >0 = slave id on master; ignored on slave.
// all_clients = true (master only): push deadzone to every registered slave via ESP-NOW.
message AccelDeadzoneRequest {
  bool write = 1;
  uint32 deadzone = 2;
  uint32 client_id = 3;
  bool all_clients = 4;
}

message AccelDeadzoneResponse {
  uint32 deadzone = 1;
  uint32 client_id = 2;
  bool success = 3;
  uint32 slaves_updated = 4;
}

message EspNowUnicastTestRequest {
  uint32 client_id = 1;
  uint32 seq = 2;
}

message EspNowUnicastTestResponse {
  bool success = 1;
  uint32 seq = 2;
}

message OtaStartPayload {
  uint32 total_size = 1;
  uint32 block_size = 2;
}

message OtaPayload {
  uint32 block_id = 1;
  uint32 chunk_id = 2;
  bytes data = 3;
}

message OtaEndPayload {
  uint32 status = 1; 
}

message OtaStatusPayload { 
  uint32 status = 1; 
}