syntax = "proto3";

package gitks;

import "repository.proto";

// HookService provides gRPC callback hooks for git operations.
// External services can implement this interface to receive hook callbacks.
service HookService {
  // Pre-receive hook callback: validate push before it happens.
  rpc PreReceiveHook(PreReceiveHookRequest) returns (PreReceiveHookResponse);

  // Update hook callback: validate each ref update individually.
  rpc UpdateHook(UpdateHookRequest) returns (UpdateHookResponse);

  // Post-receive hook callback: notify after push has completed.
  rpc PostReceiveHook(PostReceiveHookRequest) returns (PostReceiveHookResponse);
}

message PreReceiveHookRequest {
  RepositoryHeader repository = 1;
  repeated RefUpdate ref_updates = 2;
  string push_options = 3;
}

message PreReceiveHookResponse {
  bool accept = 1;
  string rejection_message = 2;
}

message UpdateHookRequest {
  RepositoryHeader repository = 1;
  string ref_name = 2;
  string old_oid = 3;
  string new_oid = 4;
}

message UpdateHookResponse {
  bool accept = 1;
  string rejection_message = 2;
}

message PostReceiveHookRequest {
  RepositoryHeader repository = 1;
  repeated RefUpdate ref_updates = 2;
}

message PostReceiveHookResponse {
  repeated HookAction actions = 1;
}

message RefUpdate {
  string old_oid = 1;
  string new_oid = 2;
  string ref_name = 3;
}

message HookAction {
  string action_type = 1;  // "trigger_ci", "update_index", etc.
  string payload = 2;
}