syntax = "proto3";
package anytype;
option go_package = "/syncproto";

import "pkg/acl/aclchanges/aclpb/protos/aclchanges.proto";
import "pkg/acl/treestorage/treepb/protos/tree.proto";

message Message {
    Header header = 1;
    bytes data = 2;
}

message Header {
    bytes traceId = 1;
    uint64 requestId = 2;
    uint64 replyId = 3;
    MessageType type = 4;
}

enum MessageType {
    MessageTypeSystem = 0;
    MessageTypeSubscription = 1;
    MessageTypeSync = 2;
}

message System {
    Handshake handshake = 1;
    Ping ping = 2;
    Ack ack = 3;

    message Handshake {
        string protocolVersion = 1;
    }
    message Ping {
        uint64 unixTime = 1;
    }
    message Ack {
        Error error = 2;
    }
    message Error {
        Code code = 1;
        string description = 2;

        enum Code {
            UNKNOWN = 0;
            UNSUPPORTED_PROTOCOL_VERSION = 10;
        }
    }
}

message Subscription {
    SubscribeSpace subscribeSpace = 1;
    UnsubscribeSpace unsubscribeSpace = 2;

    message SubscribeSpace {
        string spaceId = 1;
    }
    message UnsubscribeSpace {
        string spaceId = 1;
    }
}

message Sync {
    string spaceId = 1;
    ContentValue message = 2;

    message ContentValue {
        oneof value {
            HeadUpdate headUpdate = 1;
            Full.Request fullSyncRequest = 2;
            Full.Response fullSyncResponse = 3;
        }
    }

    message HeadUpdate {
        repeated string heads = 1;
        repeated acl.RawChange changes = 2;
        string treeId = 3;
        repeated string snapshotPath = 4;
        tree.TreeHeader treeHeader = 5;
    }

    message Full {
        // here with send the request with all changes we have (we already know sender's snapshot path)
        message Request {
            repeated string heads = 1;
            repeated acl.RawChange changes = 2;
            string treeId = 3;
            repeated string snapshotPath = 4;
            tree.TreeHeader treeHeader = 5;
        }

        message Response {
            repeated string heads = 1;
            repeated acl.RawChange changes = 2;
            string treeId = 3;
            repeated string snapshotPath = 4;
            tree.TreeHeader treeHeader = 5;
        }
    }
}