syntax = "proto3";

package tipb.tici;

import "gogoproto/gogo.proto";
import "rustproto.proto";

option (gogoproto.marshaler_all) = true;
option (gogoproto.sizer_all) = true;
option (gogoproto.unmarshaler_all) = true;
option (gogoproto.goproto_unkeyed_all) = false;
option (gogoproto.goproto_unrecognized_all) = false;
option (gogoproto.goproto_sizecache_all) = false;
option (rustproto.lite_runtime_all) = true;

// IndexerService provides index creation and deletion functionality
service IndexerService {
  // CreateIndex creates a new index
  rpc CreateIndex(CreateIndexRequest) returns (CreateIndexResponse);
  
  // DropIndex removes an existing index
  rpc DropIndex(DropIndexRequest) returns (DropIndexResponse);
  
  // GetIndexProgress retrieves the current progress of an index build
  rpc GetIndexProgress(GetIndexProgressRequest) returns (GetIndexProgressResponse);
}

// IndexType represents the type of index
enum IndexType {
  // Default value must be 0 in proto3
  UNKNOWN = 0;
  // Full-text index type
  FULL_TEXT = 1;
  // Custom index type
  CUSTOM = 2;
}

// ParserType represents the type of parser
enum ParserType {
  // Default value must be 0 in proto3
  UNKNOWN_PARSER = 0;
  // Default parser
  DEFAULT_PARSER = 1;
  // Other parser types
  OTHER_PARSER = 2;
}

// CreateIndexRequest is a request to create an index
message CreateIndexRequest {
  // Index information
  TiCIIndexInfo index_info = 1;
  // Table information
  TiCITableInfo table_info = 2;
}

// CreateIndexResponse is a response to the index creation request
message CreateIndexResponse {
  // Operation result status code, 0 means success
  int32 status = 1;
  // Error message, only valid when status is non-zero
  string error_message = 2;
  // Created index ID
  string index_id = 3;
}

// DropIndexRequest is a request to drop an index
message DropIndexRequest {
  // Index ID
  int64 table_id = 1;
  string index_id = 2;

}

// DropIndexResponse is a response to the index drop request
message DropIndexResponse {
  // Operation result status code, 0 means success
  int32 status = 1;
  // Error message, only valid when status is non-zero
  string error_message = 2;
}

// TableInfo represents table information
message TiCITableInfo {
  // Table ID
  int64 table_id = 1;
  // Table name
  string table_name = 2;
  // Database name
  string database_name = 3;
  // Table version
  int64 version = 4;
  // Column information
  repeated TiCIColumnInfo columns = 5;
}

// ColumnInfo represents column information
message TiCIColumnInfo {
  // Column ID
  int64 column_id = 1;
  // Column name
  string column_name = 2;
  // MySQL type
  int32 type = 3;
  // Collation
  int32 collation = 4;
  // Column length
  int32 column_length = 5;
  // Decimal places
  int32 decimal = 6;
  // Flags
  int32 flag = 7;
  // Enum elements
  repeated string elems = 8;
  // Default value
  bytes default_val = 9;
  // Whether it's a primary key
  bool is_primary_key = 10;
  // Whether it's an array
  bool is_array = 11;
}

// IndexInfo represents index information
message TiCIIndexInfo {
  // Index ID
  int64 index_id = 1;
  // Index name
  string index_name = 2;
  // Index type (fulltext, custom)
  IndexType index_type = 3;
  // Index columns
  repeated TiCIColumnInfo columns = 4;
  // Whether the index is unique
  bool is_unique = 5;
  // Parser information
  ParserInfo parser_info = 6;
  // Other index parameters
  map<string, string> other_params = 7;
}

// ParserInfo represents parser information
message ParserInfo {
  // Parser type
  ParserType parser_type = 1;
  // Parser parameters
  map<string, string> parser_params = 2;
}

// GetIndexProgressRequest is a request to get the progress of an index build
message GetIndexProgressRequest {
  // Table ID
  int64 table_id = 1;
  // Index ID
  int64 index_id = 2;
}

// GetIndexProgressResponse is a response containing index build progress
message GetIndexProgressResponse {
  // Operation result status code, 0 means success
  int32 status = 1;
  // Error message, only valid when status is non-zero
  string error_message = 2;
  // Number of documents indexed so far
  uint64 document_count = 3;
  // Build task state (PENDING, RUNNING, COMPLETED, FAILED)
  string state = 4;
  // Whether index has been uploaded to S3
  bool is_uploaded = 5;
  // Last S3 upload time in RFC3339 format
  string last_upload_time = 6;
  // S3 path where the index is stored
  repeated string s3_path = 7;
}