syntax = "proto3";

package reckondb.client.messages;

import "ClientAPI/ClientMessageDtos.proto";

// ReckonDB EventStore gRPC Service
// This service exposes the main EventStore operations via gRPC
service EventStore {
    // Write events to a stream
    rpc WriteEvents(reckondb.client.messages.WriteEvents) returns (reckondb.client.messages.WriteEventsCompleted);
    
    // Read a single event from a stream
    rpc ReadEvent(reckondb.client.messages.ReadEvent) returns (reckondb.client.messages.ReadEventCompleted);
    
    // Read multiple events from a stream
    rpc ReadStreamEvents(reckondb.client.messages.ReadStreamEvents) returns (reckondb.client.messages.ReadStreamEventsCompleted);
    
    // Read all events from the global stream
    rpc ReadAllEvents(reckondb.client.messages.ReadAllEvents) returns (reckondb.client.messages.ReadAllEventsCompleted);
    
    // Stream events from a specific stream (server streaming)
    rpc SubscribeToStream(reckondb.client.messages.SubscribeToStream) returns (stream reckondb.client.messages.StreamEventAppeared);
    
    // Delete a stream
    rpc DeleteStream(reckondb.client.messages.DeleteStream) returns (reckondb.client.messages.DeleteStreamCompleted);
    
    // Transaction operations
    rpc StartTransaction(reckondb.client.messages.TransactionStart) returns (reckondb.client.messages.TransactionStartCompleted);
    rpc WriteToTransaction(reckondb.client.messages.TransactionWrite) returns (reckondb.client.messages.TransactionWriteCompleted);
    rpc CommitTransaction(reckondb.client.messages.TransactionCommit) returns (reckondb.client.messages.TransactionCommitCompleted);
    
    // Health check
    rpc HealthCheck(HealthCheckRequest) returns (HealthCheckResponse);
    
    // Get stream metadata/info
    rpc GetStreamInfo(GetStreamInfoRequest) returns (GetStreamInfoResponse);
}

// Additional messages needed for the service
message HealthCheckRequest {
    string service = 1;
}

message HealthCheckResponse {
    enum ServingStatus {
        UNKNOWN = 0;
        SERVING = 1;
        NOT_SERVING = 2;
    }
    ServingStatus status = 1;
}

message GetStreamInfoRequest {
    string event_stream_id = 1;
}

message GetStreamInfoResponse {
    string event_stream_id = 1;
    int64 current_version = 2;
    int64 event_count = 3;
    bool exists = 4;
    int64 created_date = 5;
}

// Store management messages
message ListStoresRequest {
}

message ListStoresResponse {
    repeated StoreInfo stores = 1;
}

message StoreInfo {
    string store_id = 1;
    string name = 2;
    bool active = 3;
    int64 event_count = 4;
    int64 stream_count = 5;
}


// Extend the service with store management
service StoreManagement {
    // List all available stores
    rpc ListStores(ListStoresRequest) returns (ListStoresResponse);
}