syntax = "proto3";
package milvus.proto.rootcoord;

option go_package="github.com/milvus-io/milvus/internal/proto/rootcoordpb";

import "common.proto";
import "milvus.proto";
import "internal.proto";
import "proxy.proto";
import "data_coord.proto";
import "etcd_meta.proto";

service RootCoord {
  rpc GetComponentStates(internal.GetComponentStatesRequest) returns (internal.ComponentStates) {}
  rpc GetTimeTickChannel(internal.GetTimeTickChannelRequest) returns(milvus.StringResponse) {}
  rpc GetStatisticsChannel(internal.GetStatisticsChannelRequest) returns(milvus.StringResponse){}
    /**
     * @brief This method is used to create collection
     *
     * @param CreateCollectionRequest, use to provide collection information to be created.
     *
     * @return Status
     */
    rpc CreateCollection(milvus.CreateCollectionRequest) returns (common.Status){}

    /**
     * @brief This method is used to delete collection.
     *
     * @param DropCollectionRequest, collection name is going to be deleted.
     *
     * @return Status
     */
    rpc DropCollection(milvus.DropCollectionRequest) returns (common.Status) {}

    /**
     * @brief This method is used to test collection existence.
     *
     * @param HasCollectionRequest, collection name is going to be tested.
     *
     * @return BoolResponse
     */
    rpc HasCollection(milvus.HasCollectionRequest) returns (milvus.BoolResponse) {}

    /**
     * @brief This method is used to get collection schema.
     *
     * @param DescribeCollectionRequest, target collection name.
     *
     * @return CollectionSchema
     */
    rpc DescribeCollection(milvus.DescribeCollectionRequest) returns (milvus.DescribeCollectionResponse) {}

    rpc CreateAlias(milvus.CreateAliasRequest) returns (common.Status) {}
    rpc DropAlias(milvus.DropAliasRequest) returns (common.Status) {}
    rpc AlterAlias(milvus.AlterAliasRequest) returns (common.Status) {}

    /**
     * @brief This method is used to list all collections.
     *
     * @return StringListResponse, collection name list
     */
    rpc ShowCollections(milvus.ShowCollectionsRequest) returns (milvus.ShowCollectionsResponse) {}

    /**
     * @brief This method is used to create partition
     *
     * @return Status
     */
    rpc CreatePartition(milvus.CreatePartitionRequest) returns (common.Status) {}

    /**
     * @brief This method is used to drop partition
     *
     * @return Status
     */
    rpc DropPartition(milvus.DropPartitionRequest) returns (common.Status) {}

    /**
     * @brief This method is used to test partition existence.
     *
     * @return BoolResponse
     */
    rpc HasPartition(milvus.HasPartitionRequest) returns (milvus.BoolResponse) {}

    /**
     * @brief This method is used to show partition information
     *
     * @param ShowPartitionRequest, target collection name.
     *
     * @return StringListResponse
     */
    rpc ShowPartitions(milvus.ShowPartitionsRequest) returns (milvus.ShowPartitionsResponse) {}

    rpc DescribeSegment(milvus.DescribeSegmentRequest) returns (milvus.DescribeSegmentResponse) {}
    rpc ShowSegments(milvus.ShowSegmentsRequest) returns (milvus.ShowSegmentsResponse) {}
    rpc DescribeSegments(DescribeSegmentsRequest) returns (DescribeSegmentsResponse) {}

    rpc CreateIndex(milvus.CreateIndexRequest) returns (common.Status) {}
    rpc DescribeIndex(milvus.DescribeIndexRequest) returns (milvus.DescribeIndexResponse) {}
    rpc DropIndex(milvus.DropIndexRequest) returns (common.Status) {}

    rpc AllocTimestamp(AllocTimestampRequest) returns (AllocTimestampResponse) {}
    rpc AllocID(AllocIDRequest) returns (AllocIDResponse) {}
    rpc UpdateChannelTimeTick(internal.ChannelTimeTickMsg) returns (common.Status) {}
    rpc ReleaseDQLMessageStream(proxy.ReleaseDQLMessageStreamRequest) returns (common.Status) {}
    rpc SegmentFlushCompleted(data.SegmentFlushCompletedMsg) returns (common.Status) {}

    // https://wiki.lfaidata.foundation/display/MIL/MEP+8+--+Add+metrics+for+proxy
    rpc GetMetrics(milvus.GetMetricsRequest) returns (milvus.GetMetricsResponse) {}

    // https://wiki.lfaidata.foundation/display/MIL/MEP+24+--+Support+bulk+load
    rpc Import(milvus.ImportRequest) returns (milvus.ImportResponse) {}
    rpc GetImportState(milvus.GetImportStateRequest) returns (milvus.GetImportStateResponse) {}
    rpc ListImportTasks(milvus.ListImportTasksRequest) returns (milvus.ListImportTasksResponse) {}
    rpc ReportImport(ImportResult) returns (common.Status) {}

    // https://wiki.lfaidata.foundation/display/MIL/MEP+27+--+Support+Basic+Authentication
    rpc CreateCredential(internal.CredentialInfo) returns (common.Status) {}
    rpc UpdateCredential(internal.CredentialInfo) returns (common.Status) {}
    rpc DeleteCredential(milvus.DeleteCredentialRequest) returns (common.Status) {}
    rpc ListCredUsers(milvus.ListCredUsersRequest) returns (milvus.ListCredUsersResponse) {}
    // userd by proxy, not exposed to sdk
    rpc GetCredential(GetCredentialRequest) returns (GetCredentialResponse) {}
}

message AllocTimestampRequest {
  common.MsgBase base = 1;
  uint32 count = 3;
}

message AllocTimestampResponse {
    common.Status status = 1;
    uint64 timestamp = 2;
    uint32 count = 3;
}

message AllocIDRequest {
  common.MsgBase base = 1;
  uint32 count = 2;
}

message AllocIDResponse {
  common.Status status = 1;
  int64 ID = 2;
  uint32 count = 3;
}

message ImportResult {
  common.Status status = 1;
  int64 task_id = 2;                       // id of the task
  int64 datanode_id = 3;                   // id of the datanode which takes this task
  common.ImportState state = 4;            // state of the task
  repeated int64 segments = 5;             // id array of new sealed segments
  repeated int64 auto_ids = 6;             // auto-generated ids for auto-id primary key
  int64 row_count = 7;                     // how many rows are imported by this task
  repeated common.KeyValuePair infos = 8;  // more informations about the task, file path, failed reason, etc.
}

// TODO: find a proper place for these segment-related messages.

message DescribeSegmentsRequest {
  common.MsgBase base = 1;
  int64 collectionID = 2;
  repeated int64 segmentIDs = 3;
}

message SegmentBaseInfo {
  int64 collectionID = 1; // in which collection.
  int64 partitionID = 2;  // in which partition.
  int64 segmentID = 3;
}

message SegmentInfos {
  SegmentBaseInfo base_info = 1;                    // base information.
  repeated etcd.SegmentIndexInfo index_infos = 2;   // multiple index infos.
  map<int64, etcd.IndexInfo> extra_index_infos = 3; // index_id -> IndexInfo{index_name, index_id, index_params}
}

message DescribeSegmentsResponse {
  common.Status status = 1;
  int64 collectionID = 2;
  map<int64, SegmentInfos> segment_infos = 3; // segment_id -> segment infos
}

message GetCredentialRequest {
  // Not useful for now
  common.MsgBase base = 1;
  // username
  string username = 2;
}

message GetCredentialResponse {
  // Contain error_code and reason
  common.Status status = 1;
  // username
  string username = 2;
  // password
  string password = 3;
}