// Copyright 2019 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

syntax = "proto3";

import "github.com/gogo/protobuf@v1.3.2/gogoproto/gogo.proto";

option go_package = "checkpointspb";
option (gogoproto.goproto_getters_all) = false;

message CheckpointsModel {
    // key is table_name
    map<string, TableCheckpointModel> checkpoints = 1;
    TaskCheckpointModel task_checkpoint = 2;
}

message TaskCheckpointModel {
    int64 task_id = 1;
    string source_dir = 2;
    string backend = 3;
    string importer_addr = 4;
    string tidb_host = 5;
    int32 tidb_port = 6;
    string pd_addr = 7;
    string sorted_kv_dir = 8;
    string lightning_ver = 9;
}

message TableCheckpointModel {
    bytes hash = 1;
    uint32 status = 3;
    // previously we use 4 to store alloc_base, but now it's deleted, reverse 4
    // to avoid reusing it.
    reserved 4;
    map<sint32, EngineCheckpointModel> engines = 8;
    int64 tableID = 9;
    uint64 kv_bytes = 10;
    uint64 kv_kvs = 11;
    fixed64 kv_checksum = 12;
    bytes table_info = 13;
    // used to record the max auto random ID without the sharding bits that has been used.
    int64 autoRandBase = 14;
    // used to record the max auto increment ID that has been used.
    int64 autoIncrBase = 15;
    // used to record the max auto row ID that has been used.
    int64 autoRowIDBase = 16;
}

message EngineCheckpointModel {
    uint32 status = 1;
    // key is "$path:$offset"
    map<string, ChunkCheckpointModel> chunks = 2;
}

message ChunkCheckpointModel {
    string path = 1;
    int64 offset = 2;
    repeated int32 column_permutation = 12;
    int64 end_offset = 5;
    int64 pos = 6;
    int64 prev_rowid_max = 7;
    int64 rowid_max = 8;
    uint64 kvc_bytes = 9;
    uint64 kvc_kvs = 10;
    fixed64 kvc_checksum = 11;
    sfixed64 timestamp = 13;
    int32 type = 14;
    int32 compression = 15;
    string sort_key = 16;
    int64 file_size = 17;
    int64 real_pos = 18;
}