syntax = "proto3";

package v1;

import "google/protobuf/wrappers.proto";
import "google/protobuf/any.proto";
import "model.proto";

option go_package = "github.com/polarismesh/specification/source/go/api/v1/traffic_manage";
option java_package = "com.tencent.polaris.specification.api.v1.traffic.manage";
option java_outer_classname = "RoutingProto";

message Routing {
  // 规则所属服务以及命名空间

  google.protobuf.StringValue service = 1;
  google.protobuf.StringValue namespace = 2;

  // 每个服务可以配置多条入站或者出站规则
  // 对于每个请求，从上到下依次匹配，若命中则终止
  repeated Route inbounds = 3;
  repeated Route outbounds = 4;

  google.protobuf.StringValue ctime = 5;
  google.protobuf.StringValue mtime = 6;
  google.protobuf.StringValue revision = 7;

  google.protobuf.StringValue service_token = 8 [ json_name = "service_token" ];

  reserved 9 to 20;
  // route rules for current service
  repeated RouteRule rules = 21;
}

// deprecated: only for compatible to the old version server
message Route {
  // 如果匹配Source规则，按照Destination路由
  // 多个Source之间的关系为或
  repeated Source sources = 1;
  repeated Destination destinations = 2;

  // extendInfo 用于承载一些额外信息
  // case 1: 升级到 v2 版本时，记录对应到 v2 版本的 id 信息
  map<string, string> extendInfo = 3;
}

// deprecated: only for compatible to the old version server
message Source {
  // 主调方服务以及命名空间
  google.protobuf.StringValue service = 1;
  google.protobuf.StringValue namespace = 2;

  // 主调方服务实例标签或者请求标签
  // value支持正则匹配
  map<string, MatchString> metadata = 3;
}

// deprecated: only for compatible to the old version server
message Destination {
  // 被调方服务以及命名空间
  google.protobuf.StringValue service = 1;
  google.protobuf.StringValue namespace = 2;

  // 被调方服务实例标签
  // value支持正则匹配
  map<string, MatchString> metadata = 3;

  // 根据服务名和服务实例metadata筛选符合条件的服务实例子集
  // 服务实例子集可以设置优先级和权重
  // 优先级：整型，范围[0, 9]，最高优先级为0
  // 权重：整型
  // 先按优先级路由，如果存在高优先级，不会使用低优先级
  // 如果存在优先级相同的子集，再按权重分配
  // 优先级和权重可以都不设置/设置一个/设置两个
  // 如果部分设置优先级，部分没有设置，认为没有设置的优先级最低
  // 如果部分设置权重，部分没有设置，认为没有设置的权重为0
  // 如果全部没有设置权重，认为权重相同
  google.protobuf.UInt32Value priority = 4;
  google.protobuf.UInt32Value weight = 5;

  // 将请求转发到代理服务
  google.protobuf.StringValue transfer = 6;

  //是否对该set执行隔离，隔离后，不会再分配流量
  google.protobuf.BoolValue isolate = 7;

  // 实例分组名
  google.protobuf.StringValue name = 8;
}

enum RoutingPolicy {
  // Route by rule rule => RuleRoutingConfig
  RulePolicy = 0;
  // Route by destination metadata ==> MetadataRoutingConfig
  MetadataPolicy = 1;
  // Route by Nearby rule => NearByRoutingConfig
  NearbyPolicy = 2;
}

// configuration root for route
message RouteRule {
  string id = 1;
  // route rule name
  string name = 2;
  // namespace namingspace of routing rules
  string namespace = 3;
  // Enable this router
  bool enable = 4;
  // Router type
  RoutingPolicy routing_policy = 5 [ json_name = "routing_policy" ];
  // Routing configuration for router
  google.protobuf.Any routing_config = 6 [ json_name = "routing_config" ];
  // revision routing version
  string revision = 7;
  // ctime create time of the rules
  string ctime = 8;
  // mtime modify time of the rules
  string mtime = 9;
  // etime enable time of the rules
  string etime = 10;
  // priority rules priority
  uint32 priority = 11;
  // description simple description rules
  string description = 12;
  // extendInfo 用于承载一些额外信息
  // case 1: 升级到 v2 版本时，记录对应到 v1 版本的 id 信息
  // deprecated_filed only for compatible to the old version server
  map<string, string> extendInfo = 20;
  // 路由规则标签数据
  map<string, string> metadata = 21;
  // 操作标志位
  bool editable = 30 [ json_name = "editable" ];
  bool deleteable = 31 [ json_name = "deleteable" ];
}

message MetadataFailover {
  enum FailoverRange {
    // ALL return all instances
    ALL = 0;
    // OTHERS retuen without thie labels instances
    OTHERS = 1;
    // OTHER_KEYS return other instances which match keys
    OTHER_KEYS = 2;
  }
  // failover_range metadata route bottom type
  FailoverRange failover_range = 1;
  // only use to failover_range == OTHER_KEYS
  map<string, string> labels = 2;
}

// MetadataRoutingConfig metadata routing configuration
message MetadataRoutingConfig {
  // service
  string service = 1;
  // namespace
  string namespace = 2;
  map<string, string> labels = 3;
  // When metadata not found, it will fall back to the
  MetadataFailover failover = 4;
}

// NearbyRoutingConfig routing configuration
message NearbyRoutingConfig {
  enum LocationLevel {
    // 未知就近级别，等同于未定义级别
    UNKNOWN = 0;
    // 机房就近级别
    CAMPUS = 1;
    // 可用区就近级别
    ZONE = 2;
    // 地域就近级别
    REGION = 3;
    // 全局就近级别
    ALL = 4;
  }
  // 被调服务名，支持*，代表全部服务
  string service = 1 [ json_name = "service" ];
  // 被调命名空间
  string namespace = 2 [ json_name = "namespace" ];
  // 默认就近级别
  LocationLevel match_level = 3 [ json_name = "match_level" ];
  // 最大就近级别
  LocationLevel max_match_level = 4 [ json_name = "max_match_level" ];
  // 是否强制就近
  bool strict_nearby = 5 [ json_name = "strict_nearby" ];
}

// RuleRoutingConfig routing configuration
message RuleRoutingConfig {
  // source source info
  // deprecated_filed  only for compatible to the old version server
  repeated SourceService sources = 1 [deprecated = true];
  // destination destinations info
  // deprecated_filed  only for compatible to the old version server
  repeated DestinationGroup destinations = 2 [deprecated = true];
  // rule route chain
  repeated SubRuleRouting rules = 3;
}

// SubRuleRouting sub routing configuration
message SubRuleRouting {
    // sub routing rule name
    string name = 1;
    // source source info
    repeated SourceService sources = 2;
    // destination destinations info
    repeated DestinationGroup destinations = 3;
}

message SourceService {
  // Main tuning service and namespace
  string service = 1;
  string namespace = 2;

  // Master Control Service Example Tag or Request Label
  // Value supports regular matching
  repeated SourceMatch arguments = 3;
}

message DestinationGroup {
  // Templated service and namespace
  string service = 1;
  string namespace = 2;

  // Templated service example label
  // Value supports regular matching
  map<string, MatchString> labels = 3;

  // According to the service name and service instance Metadata Filter the
  // qualified service instance subset Service instance subset can set priority
  // and weight Priority: integer, range [0, 9], the highest priority is 0
  // Weight: Integer
  // Press priority routing, if there is high priority, low priority will not
  // use If there is a subset of the same priority, then assign by weight
  // Priority and weight can be not set / set up one / set two
  // If the section is set priority, some are not set, it is considered that the
  // priority is not set. If the part is set, some is not set, it is considered
  // that the weight is not set to 0 If you have no weight, you think the weight
  // is the same
  uint32 priority = 4;
  uint32 weight = 5;

  // Forward requests to proxy service
  string transfer = 6;

  // Whether to isolate the SET, after isolation, no traffic will be allocated
  bool isolate = 7;

  // name desition name
  string name = 8;
}

// SourceMatch
message SourceMatch {
  // label type for gateway request
  enum Type {
    // custom arguments
    CUSTOM = 0;
    // method, match the http post/get/put/delete or grpc method
    METHOD = 1;
    // header, match the http header, dubbo attachment, grpc header
    HEADER = 2;
    // query, match the http query, dubbo argument
    QUERY = 3;
    // caller host ip
    CALLER_IP = 4;
    // path, math the http url
    PATH = 5;
    // cookie match http cookie
    COOKIE = 6;
    // indicate the caller instance metadata
    CALLER_METADATA = 7;
  }
  Type type = 1;
  // header key or query key
  string key = 2;
  // header value or query value
  MatchString value = 3;
}