syntax = "proto3";
package history;

service History {
  rpc StartHistory(StartHistoryRequest) returns (StartHistoryReply);
  rpc EndHistory(EndHistoryRequest) returns (EndHistoryReply);
  rpc AddHistory(AddHistoryRequest) returns (EndHistoryReply);

  rpc TailHistory(TailHistoryRequest) returns (stream TailHistoryReply);

  // Request history from the daemon
  rpc History(HistoryRequest) returns (HistoryReply);
}

message AddHistoryRequest {
  StartHistoryRequest start = 1;
  int64 exit = 2;
  Duration duration = 3;
}

message StartHistoryRequest {
  Timestamp timestamp = 1;
  string command = 2;
  string cwd = 3;
  string session = 4;
  string hostname = 5;
  string author = 6;
  optional string intent = 7;
}
message StartHistoryReply {
  string id = 1;
  string version = 2;
  uint32 protocol = 3;
}

message EndHistoryRequest {
  string id = 1;

  int64 exit = 2;
  Duration duration = 3;
}
message EndHistoryReply {
  string id = 1;
  uint64 idx = 2;
  string version = 3;
  uint32 protocol = 4;
}


message TailHistoryRequest {}
message TailHistoryReply {
  HistoryEventKind kind = 1;
  HistoryEntry history = 2;
}

enum HistoryEventKind {
  HISTORY_EVENT_KIND_UNSPECIFIED = 0;
  HISTORY_EVENT_KIND_STARTED = 1;
  HISTORY_EVENT_KIND_ENDED = 2;
}

message HistoryEntry {
  Timestamp timestamp = 1;
  string id = 2;
  string command = 3;
  string cwd = 4;
  string session = 5;
  string hostname = 6;
  string author = 7;
  string intent = 8;
  int64 exit = 9;
  Duration duration = 10;
}

message Range {
  Timestamp start = 1;
  Timestamp end = 2;
}

message Timestamp {
  // Encoded as nanoseconds since the UNIX epoch.
  uint64 value = 1;
}
message Duration {
  // Encoded as nanoseconds.
  uint64 value = 1;
}

message HistoryRequest {
  Range range = 2;
}
message HistoryReply {
  repeated HistoryEntry entries = 1;
}