// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0

syntax = "proto3";

package hashicorp.consul.mesh.v1alpha1;

import "google/protobuf/struct.proto";
import "pbcatalog/v1alpha1/selector.proto";
import "pbmesh/v1alpha1/connection.proto";
import "pbmesh/v1alpha1/expose.proto";
import "pbmesh/v1alpha1/routing.proto";

message ProxyConfiguration {
  // Selection of workloads this proxy configuration should apply to.
  // These can be prefixes or specific workload names.
  hashicorp.consul.catalog.v1alpha1.WorkloadSelector workloads = 1;

  // dynamic_config is the configuration that could be changed
  // dynamically (i.e. without needing restart).
  DynamicConfig dynamic_config = 2;

  // bootstrap_config is the configuration that requires proxies
  // to be restarted to be applied.
  BootstrapConfig bootstrap_config = 3;

  // deprecated: prevent usage when using v2 APIs directly.
  // needed for backwards compatibility
  google.protobuf.Struct opaque_config = 4 [deprecated = true];
}

message DynamicConfig {
  // mode indicates the proxy's mode. This will default to 'transparent'.
  ProxyMode mode = 1;

  TransparentProxy transparent_proxy = 2;

  // local_connection is the configuration that should be used
  // to connect to the local application provided per-port.
  // The map keys should correspond to port names on the workload.
  map<string, ConnectionConfig> local_connection = 3;

  // inbound_connections configures inbound connections to the proxy.
  InboundConnectionsConfig inbound_connections = 4;

  MeshGatewayMode mesh_gateway_mode = 5;

  ExposeConfig expose_config = 6;

  string public_listener_json = 7;
  string listener_tracing_json = 8;
  string local_cluster_json = 9;

  // deprecated:
  // local_workload_address, local_workload_port, and local_workload_socket_path
  // are deprecated and are only needed for migration of existing resources.
  string local_workload_address = 10 [deprecated = true];
  uint32 local_workload_port = 11 [deprecated = true];
  string local_workload_socket_path = 12 [deprecated = true];
}

message TransparentProxy {
  // outbound_listener_port is the port for the proxy's outbound listener.
  // This defaults to 15001.
  uint32 outbound_listener_port = 1;

  // dialed_directly indicates whether this proxy should be dialed using original destination IP
  // in the connection rather than load balance between all endpoints.
  bool dialed_directly = 2;
}

// BootstrapConfig is equivalent to configuration defined
// in our docs.
message BootstrapConfig {
  string statsd_url = 1;
  string dogstatsd_url = 2;
  repeated string stats_tags = 3;
  string prometheus_bind_addr = 4;
  string stats_bind_addr = 5;
  string ready_bind_addr = 6;
  string override_json_tpl = 7;
  string static_clusters_json = 8;
  string static_listeners_json = 9;
  string stats_sinks_json = 10;
  string stats_config_json = 11;
  string stats_flush_interval = 12;
  string tracing_config_json = 13;
}

enum ProxyMode {
  // ProxyModeDefault represents no specific mode and should
  // be used to indicate that a different layer of the configuration
  // chain should take precedence
  // buf:lint:ignore ENUM_ZERO_VALUE_SUFFIX
  PROXY_MODE_DEFAULT = 0;

  // ProxyModeTransparent represents that inbound and outbound application
  // traffic is being captured and redirected through the proxy.
  PROXY_MODE_TRANSPARENT = 1;

  // ProxyModeDirect represents that the proxy's listeners must be dialed directly
  // by the local application and other proxies.
  PROXY_MODE_DIRECT = 2;
}