// Copyright (C) 2019-2020 Zilliz. All rights reserved.
//
// 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

#include <gtest/gtest.h>

#include "segcore/SegmentGrowing.h"
#include "segcore/SegmentGrowingImpl.h"
#include "pb/schema.pb.h"
#include "test_utils/DataGen.h"

using namespace milvus::segcore;
using namespace milvus;
namespace pb = milvus::proto;

TEST(Growing, DeleteCount) {
    auto schema = std::make_shared<Schema>();
    auto pk = schema->AddDebugField("pk", DataType::INT64);
    schema->set_primary_field_id(pk);
    auto segment = CreateGrowingSegment(schema);

    int64_t c = 10;
    auto offset = segment->PreDelete(c);
    ASSERT_EQ(offset, 0);

    Timestamp begin_ts = 100;
    auto tss = GenTss(c, begin_ts);
    auto pks = GenPKs(c, 0);
    auto status = segment->Delete(offset, c, pks.get(), tss.data());
    ASSERT_TRUE(status.ok());

    auto cnt = segment->get_deleted_count();
    ASSERT_EQ(cnt, c);
}

TEST(Growing, RealCount) {
    auto schema = std::make_shared<Schema>();
    auto pk = schema->AddDebugField("pk", DataType::INT64);
    schema->set_primary_field_id(pk);
    auto segment = CreateGrowingSegment(schema);

    int64_t c = 10;
    auto offset = segment->PreInsert(c);
    ASSERT_EQ(offset, 0);
    auto dataset = DataGen(schema, c);
    auto pks = dataset.get_col<int64_t>(pk);
    segment->Insert(offset, c, dataset.row_ids_.data(), dataset.timestamps_.data(), dataset.raw_);

    // no delete.
    ASSERT_EQ(c, segment->get_real_count());

    // delete half.
    auto half = c / 2;
    auto del_offset1 = segment->PreDelete(half);
    ASSERT_EQ(del_offset1, 0);
    auto del_ids1 = GenPKs(pks.begin(), pks.begin() + half);
    auto del_tss1 = GenTss(half, c);
    auto status = segment->Delete(del_offset1, half, del_ids1.get(), del_tss1.data());
    ASSERT_TRUE(status.ok());
    ASSERT_EQ(c - half, segment->get_real_count());

    // delete duplicate.
    auto del_offset2 = segment->PreDelete(half);
    ASSERT_EQ(del_offset2, half);
    auto del_tss2 = GenTss(half, c + half);
    status = segment->Delete(del_offset2, half, del_ids1.get(), del_tss2.data());
    ASSERT_TRUE(status.ok());
    ASSERT_EQ(c - half, segment->get_real_count());

    // delete all.
    auto del_offset3 = segment->PreDelete(c);
    ASSERT_EQ(del_offset3, half * 2);
    auto del_ids3 = GenPKs(pks.begin(), pks.end());
    auto del_tss3 = GenTss(c, c + half * 2);
    status = segment->Delete(del_offset3, c, del_ids3.get(), del_tss3.data());
    ASSERT_TRUE(status.ok());
    ASSERT_EQ(0, segment->get_real_count());
}