syntax = "proto3";

package kafkamgmt.v1;

import "google/api/annotations.proto";
import "google/protobuf/timestamp.proto";

// Generated Go code is committed to this repo under gen/kafkamgmt/v1 and
// consumed directly via `go get`. Consumers do not run buf generate themselves.
option go_package = "forgejo.riotpiao.homelab.com/rock/kmsvc-proto/gen/kafkamgmt/v1;kafkamgmtv1";

// QueueService is the message-plane API for the Kafka Management Service.
// Queue lifecycle (create/delete/configure) is managed via the Queue CRD,
// not this service — see design.md §2a/§2b in kafaka_management_service.
service QueueService {
  rpc SendMessage(SendMessageRequest) returns (SendMessageResponse) {
    option (google.api.http) = {
      post: "/v1/queues/{queue_name}/messages"
      body: "*"
    };
  }

  rpc SendMessageBatch(SendMessageBatchRequest) returns (SendMessageBatchResponse) {
    option (google.api.http) = {
      post: "/v1/queues/{queue_name}/messages:batch"
      body: "*"
    };
  }

  rpc ReceiveMessage(ReceiveMessageRequest) returns (ReceiveMessageResponse) {
    option (google.api.http) = {
      get: "/v1/queues/{queue_name}/messages"
    };
  }

  rpc DeleteMessage(DeleteMessageRequest) returns (DeleteMessageResponse) {
    option (google.api.http) = {
      delete: "/v1/queues/{queue_name}/messages/{receipt_handle}"
    };
  }

  rpc DeleteMessageBatch(DeleteMessageBatchRequest) returns (DeleteMessageBatchResponse) {
    option (google.api.http) = {
      post: "/v1/queues/{queue_name}/messages:batchDelete"
      body: "*"
    };
  }

  rpc ChangeMessageVisibility(ChangeMessageVisibilityRequest) returns (ChangeMessageVisibilityResponse) {
    option (google.api.http) = {
      patch: "/v1/queues/{queue_name}/messages/{receipt_handle}"
      body: "*"
    };
  }
}

message MessageAttributes {
  map<string, string> values = 1;
}

message SendMessageRequest {
  string queue_name = 1;
  bytes message_body = 2;
  MessageAttributes message_attributes = 3;
  string message_group_id = 4;        // FIFO only
  string message_deduplication_id = 5; // FIFO only
  int32 delay_seconds = 6;
}

message SendMessageResponse {
  string message_id = 1;
  string sequence_number = 2; // FIFO only
}

message SendMessageBatchEntry {
  string id = 1;
  bytes message_body = 2;
  MessageAttributes message_attributes = 3;
  string message_group_id = 4;
  string message_deduplication_id = 5;
  int32 delay_seconds = 6;
}

message SendMessageBatchRequest {
  string queue_name = 1;
  repeated SendMessageBatchEntry entries = 2;
}

message BatchResultEntry {
  string id = 1;
  string message_id = 2;
  string error = 3;
}

message SendMessageBatchResponse {
  repeated BatchResultEntry successful = 1;
  repeated BatchResultEntry failed = 2;
}

message ReceiveMessageRequest {
  string queue_name = 1;
  int32 max_number_of_messages = 2; // <= 10
  int32 wait_time_seconds = 3;      // 0-20, long-poll
  int32 visibility_timeout_seconds = 4; // override
}

message Message {
  string message_id = 1;
  string receipt_handle = 2;
  bytes body = 3;
  MessageAttributes attributes = 4;
  int32 receive_count = 5;
  string message_group_id = 6;
  google.protobuf.Timestamp enqueued_at = 7;
}

message ReceiveMessageResponse {
  repeated Message messages = 1;
}

message DeleteMessageRequest {
  string queue_name = 1;
  string receipt_handle = 2;
}

message DeleteMessageResponse {}

message DeleteMessageBatchEntry {
  string id = 1;
  string receipt_handle = 2;
}

message DeleteMessageBatchRequest {
  string queue_name = 1;
  repeated DeleteMessageBatchEntry entries = 2;
}

message DeleteMessageBatchResponse {
  repeated BatchResultEntry successful = 1;
  repeated BatchResultEntry failed = 2;
}

message ChangeMessageVisibilityRequest {
  string queue_name = 1;
  string receipt_handle = 2;
  int32 visibility_timeout_seconds = 3;
}

message ChangeMessageVisibilityResponse {}