// 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 "query/deprecated/ParserDeprecated.h"
#include "query/Expr.h"
#include "query/PlanNode.h"
#include "query/generated/ExprVisitor.h"
#include "query/generated/PlanNodeVisitor.h"
#include "test_utils/DataGen.h"
#include "query/generated/ShowPlanNodeVisitor.h"
#include "query/generated/ExecPlanNodeVisitor.h"
#include "query/PlanImpl.h"
#include "segcore/SegmentGrowingImpl.h"
#include "segcore/SegmentSealed.h"
#include "pb/schema.pb.h"

using namespace milvus;
using namespace milvus::query;
using namespace milvus::segcore;

TEST(Query, ShowExecutor) {
    using namespace milvus::query;
    using namespace milvus::segcore;
    using namespace milvus;
    auto node = std::make_unique<FloatVectorANNS>();
    auto schema = std::make_shared<Schema>();
    schema->AddDebugField("fakevec", DataType::VECTOR_FLOAT, 16, MetricType::METRIC_L2);
    int64_t num_queries = 100L;
    auto raw_data = DataGen(schema, num_queries);
    auto& info = node->query_info_;
    info.metric_type_ = MetricType::METRIC_L2;
    info.topK_ = 20;
    info.field_offset_ = FieldOffset(1000);
    node->predicate_ = std::nullopt;
    ShowPlanNodeVisitor show_visitor;
    PlanNodePtr base(node.release());
    auto res = show_visitor.call_child(*base);
    auto dup = res;
    std::cout << dup.dump(4);
}

TEST(Query, DSL) {
    using namespace milvus::query;
    using namespace milvus::segcore;
    ShowPlanNodeVisitor shower;

    std::string dsl_string = R"(
{
    "bool": {
        "must": [
            {
                "vector": {
                    "fakevec": {
                        "metric_type": "L2",
                        "params": {
                            "nprobe": 10
                        },
                        "query": "$0",
                        "topk": 10
                    }
                }
            }
        ]
    }
})";

    auto schema = std::make_shared<Schema>();
    schema->AddDebugField("fakevec", DataType::VECTOR_FLOAT, 16, MetricType::METRIC_L2);

    auto plan = CreatePlan(*schema, dsl_string);
    auto res = shower.call_child(*plan->plan_node_);
    std::cout << res.dump(4) << std::endl;

    std::string dsl_string2 = R"(
{
    "bool": {
        "vector": {
            "fakevec": {
                "metric_type": "L2",
                "params": {
                    "nprobe": 10
                },
                "query": "$0",
                "topk": 10
            }
        }
    }
})";
    auto plan2 = CreatePlan(*schema, dsl_string2);
    auto res2 = shower.call_child(*plan2->plan_node_);
    std::cout << res2.dump(4) << std::endl;
    ASSERT_EQ(res, res2);
}

TEST(Query, ParsePlaceholderGroup) {
    namespace ser = milvus::proto::service;
    std::string dsl_string = R"(
{
    "bool": {
        "vector": {
            "fakevec": {
                "metric_type": "L2",
                "params": {
                    "nprobe": 10
                },
                "query": "$0",
                "topk": 10
            }
        }
    }
})";

    auto schema = std::make_shared<Schema>();
    schema->AddDebugField("fakevec", DataType::VECTOR_FLOAT, 16, MetricType::METRIC_L2);
    auto plan = CreatePlan(*schema, dsl_string);
    int64_t num_queries = 100000;
    int dim = 16;
    auto raw_group = CreatePlaceholderGroup(num_queries, dim);
    auto blob = raw_group.SerializeAsString();
    auto placeholder = ParsePlaceholderGroup(plan.get(), blob);
}

TEST(Query, ExecWithPredicate) {
    using namespace milvus::query;
    using namespace milvus::segcore;
    auto schema = std::make_shared<Schema>();
    schema->AddDebugField("fakevec", DataType::VECTOR_FLOAT, 16, MetricType::METRIC_L2);
    schema->AddDebugField("age", DataType::FLOAT);
    std::string dsl = R"({
        "bool": {
            "must": [
            {
                "range": {
                    "age": {
                        "GE": -1,
                        "LT": 1
                    }
                }
            },
            {
                "vector": {
                    "fakevec": {
                        "metric_type": "L2",
                        "params": {
                            "nprobe": 10
                        },
                        "query": "$0",
                        "topk": 5
                    }
                }
            }
            ]
        }
    })";
    int64_t N = 1000 * 1000;
    auto dataset = DataGen(schema, N);
    auto segment = CreateGrowingSegment(schema);
    segment->PreInsert(N);
    segment->Insert(0, N, dataset.row_ids_.data(), dataset.timestamps_.data(), dataset.raw_);

    auto plan = CreatePlan(*schema, dsl);
    auto num_queries = 5;
    auto ph_group_raw = CreatePlaceholderGroup(num_queries, 16, 1024);
    auto ph_group = ParsePlaceholderGroup(plan.get(), ph_group_raw.SerializeAsString());
    Timestamp time = 1000000;
    std::vector<const PlaceholderGroup*> ph_group_arr = {ph_group.get()};
    auto qr = segment->Search(plan.get(), ph_group_arr.data(), &time, 1);
    int topk = 5;

    Json json = QueryResultToJson(qr);
    auto ref = json::parse(R"(
[
  [
    [
      "980486->3.149221",
      "318367->3.661235",
      "302798->4.553688",
      "321424->4.757450",
      "565529->5.083780"
    ],
    [
      "233390->7.931535",
      "238958->8.109344",
      "230645->8.439169",
      "901939->8.658772",
      "380328->8.731251"
    ],
    [
      "897246->3.749835",
      "750683->3.897577",
      "857598->4.230977",
      "299009->4.379639",
      "440010->4.454046"
    ],
    [
      "840855->4.782170",
      "709627->5.063170",
      "72322->5.166143",
      "107142->5.180207",
      "948403->5.247065"
    ],
    [
      "810401->3.926393",
      "46575->4.054171",
      "201740->4.274491",
      "669040->4.399628",
      "231500->4.831223"
    ]
  ]
])");
    ASSERT_EQ(json.dump(2), ref.dump(2));
}

TEST(Query, ExecTerm) {
    using namespace milvus::query;
    using namespace milvus::segcore;
    auto schema = std::make_shared<Schema>();
    schema->AddDebugField("fakevec", DataType::VECTOR_FLOAT, 16, MetricType::METRIC_L2);
    schema->AddDebugField("age", DataType::FLOAT);
    std::string dsl = R"({
        "bool": {
            "must": [
            {
                "term": {
                    "age": {
                        "values": []
                    }
                }
            },
            {
                "vector": {
                    "fakevec": {
                        "metric_type": "L2",
                        "params": {
                            "nprobe": 10
                        },
                        "query": "$0",
                        "topk": 5
                    }
                }
            }
            ]
        }
    })";
    int64_t N = 1000 * 1000;
    auto dataset = DataGen(schema, N);
    auto segment = CreateGrowingSegment(schema);
    segment->PreInsert(N);
    segment->Insert(0, N, dataset.row_ids_.data(), dataset.timestamps_.data(), dataset.raw_);

    auto plan = CreatePlan(*schema, dsl);
    auto num_queries = 3;
    auto ph_group_raw = CreatePlaceholderGroup(num_queries, 16, 1024);
    auto ph_group = ParsePlaceholderGroup(plan.get(), ph_group_raw.SerializeAsString());
    QueryResult qr;
    Timestamp time = 1000000;
    std::vector<const PlaceholderGroup*> ph_group_arr = {ph_group.get()};
    qr = segment->Search(plan.get(), ph_group_arr.data(), &time, 1);
    std::vector<std::vector<std::string>> results;
    int topk = 5;
    auto json = QueryResultToJson(qr);
    ASSERT_EQ(qr.num_queries_, num_queries);
    ASSERT_EQ(qr.topK_, topk);
    // for(auto x: )
}

TEST(Query, ExecEmpty) {
    using namespace milvus::query;
    using namespace milvus::segcore;
    auto schema = std::make_shared<Schema>();
    schema->AddDebugField("age", DataType::FLOAT);
    schema->AddDebugField("fakevec", DataType::VECTOR_FLOAT, 16, MetricType::METRIC_L2);
    std::string dsl = R"({
        "bool": {
            "must": [
            {
                "vector": {
                    "fakevec": {
                        "metric_type": "L2",
                        "params": {
                            "nprobe": 10
                        },
                        "query": "$0",
                        "topk": 5
                    }
                }
            }
            ]
        }
    })";
    int64_t N = 1000 * 1000;
    auto segment = CreateGrowingSegment(schema);
    auto plan = CreatePlan(*schema, dsl);
    auto num_queries = 5;
    auto ph_group_raw = CreatePlaceholderGroup(num_queries, 16, 1024);
    auto ph_group = ParsePlaceholderGroup(plan.get(), ph_group_raw.SerializeAsString());
    Timestamp time = 1000000;
    std::vector<const PlaceholderGroup*> ph_group_arr = {ph_group.get()};
    auto qr = segment->Search(plan.get(), ph_group_arr.data(), &time, 1);
    std::cout << QueryResultToJson(qr);

    for (auto i : qr.internal_seg_offsets_) {
        ASSERT_EQ(i, -1);
    }

    for (auto v : qr.result_distances_) {
        ASSERT_EQ(v, std::numeric_limits<float>::max());
    }
}

TEST(Query, ExecWithoutPredicate) {
    using namespace milvus::query;
    using namespace milvus::segcore;
    auto schema = std::make_shared<Schema>();
    schema->AddDebugField("fakevec", DataType::VECTOR_FLOAT, 16, MetricType::METRIC_L2);
    schema->AddDebugField("age", DataType::FLOAT);
    std::string dsl = R"({
        "bool": {
            "must": [
            {
                "vector": {
                    "fakevec": {
                        "metric_type": "L2",
                        "params": {
                            "nprobe": 10
                        },
                        "query": "$0",
                        "topk": 5
                    }
                }
            }
            ]
        }
    })";
    auto plan = CreatePlan(*schema, dsl);
    int64_t N = 1000 * 1000;
    auto dataset = DataGen(schema, N);
    auto segment = CreateGrowingSegment(schema);
    segment->PreInsert(N);
    segment->Insert(0, N, dataset.row_ids_.data(), dataset.timestamps_.data(), dataset.raw_);

    auto num_queries = 5;
    auto ph_group_raw = CreatePlaceholderGroup(num_queries, 16, 1024);
    auto ph_group = ParsePlaceholderGroup(plan.get(), ph_group_raw.SerializeAsString());
    QueryResult qr;
    Timestamp time = 1000000;
    std::vector<const PlaceholderGroup*> ph_group_arr = {ph_group.get()};
    qr = segment->Search(plan.get(), ph_group_arr.data(), &time, 1);
    std::vector<std::vector<std::string>> results;
    int topk = 5;
    auto json = QueryResultToJson(qr);
    auto ref = json::parse(R"(
[
  [
    [
      "980486->3.149221",
      "318367->3.661235",
      "302798->4.553688",
      "321424->4.757450",
      "565529->5.083780"
    ],
    [
      "233390->7.931535",
      "238958->8.109344",
      "230645->8.439169",
      "901939->8.658772",
      "380328->8.731251"
    ],
    [
      "749862->3.398494",
      "701321->3.632437",
      "897246->3.749835",
      "750683->3.897577",
      "105995->4.073595"
    ],
    [
      "138274->3.454446",
      "124548->3.783290",
      "840855->4.782170",
      "936719->5.026924",
      "709627->5.063170"
    ],
    [
      "810401->3.926393",
      "46575->4.054171",
      "201740->4.274491",
      "669040->4.399628",
      "231500->4.831223"
    ]
  ]
]
)");
    ASSERT_EQ(json.dump(2), ref.dump(2));
}

TEST(Indexing, InnerProduct) {
    int64_t N = 100000;
    constexpr auto dim = 16;
    constexpr auto topk = 10;
    auto num_queries = 5;
    auto schema = std::make_shared<Schema>();
    std::string dsl = R"({
        "bool": {
            "must": [
            {
                "vector": {
                    "normalized": {
                        "metric_type": "IP",
                        "params": {
                            "nprobe": 10
                        },
                        "query": "$0",
                        "topk": 5
                    }
                }
            }
            ]
        }
    })";
    schema->AddDebugField("normalized", DataType::VECTOR_FLOAT, dim, MetricType::METRIC_INNER_PRODUCT);
    auto dataset = DataGen(schema, N);
    auto segment = CreateGrowingSegment(schema);
    auto plan = CreatePlan(*schema, dsl);
    segment->PreInsert(N);
    segment->Insert(0, N, dataset.row_ids_.data(), dataset.timestamps_.data(), dataset.raw_);
    auto col = dataset.get_col<float>(0);

    auto ph_group_raw = CreatePlaceholderGroupFromBlob(num_queries, 16, col.data());
    auto ph_group = ParsePlaceholderGroup(plan.get(), ph_group_raw.SerializeAsString());
    std::vector<Timestamp> ts{(Timestamp)N * 2};
    const auto* ptr = ph_group.get();
    QueryResult qr;
    qr = segment->Search(plan.get(), &ptr, ts.data(), 1);
    std::cout << QueryResultToJson(qr).dump(2);
}

TEST(Query, FillSegment) {
    namespace pb = milvus::proto;
    pb::schema::CollectionSchema proto;
    proto.set_name("col");
    proto.set_description("asdfhsalkgfhsadg");
    proto.set_autoid(false);

    {
        auto field = proto.add_fields();
        field->set_name("fakevec");
        field->set_is_primary_key(false);
        field->set_description("asdgfsagf");
        field->set_fieldid(100);
        field->set_data_type(pb::schema::DataType::VECTOR_FLOAT);
        auto param = field->add_type_params();
        param->set_key("dim");
        param->set_value("16");
        auto iparam = field->add_index_params();
        iparam->set_key("metric_type");
        iparam->set_value("L2");
    }

    {
        auto field = proto.add_fields();
        field->set_name("the_key");
        field->set_fieldid(101);
        field->set_is_primary_key(true);
        field->set_description("asdgfsagf");
        field->set_data_type(pb::schema::DataType::INT64);
    }

    auto schema = Schema::ParseFrom(proto);
    auto segment = CreateGrowingSegment(schema);
    int N = 100000;
    auto dataset = DataGen(schema, N);
    segment->PreInsert(N);
    segment->Insert(0, N, dataset.row_ids_.data(), dataset.timestamps_.data(), dataset.raw_);
    std::string dsl = R"({
        "bool": {
            "must": [
            {
                "vector": {
                    "fakevec": {
                        "metric_type": "L2",
                        "params": {
                            "nprobe": 10
                        },
                        "query": "$0",
                        "topk": 5
                    }
                }
            }
            ]
        }
    })";
    auto plan = CreatePlan(*schema, dsl);
    auto ph_proto = CreatePlaceholderGroup(10, 16, 443);
    auto ph = ParsePlaceholderGroup(plan.get(), ph_proto.SerializeAsString());
    std::vector<const PlaceholderGroup*> groups = {ph.get()};
    std::vector<Timestamp> timestamps = {N * 2UL};
    QueryResult result;
    result = segment->Search(plan.get(), groups.data(), timestamps.data(), 1);

    auto topk = 5;
    auto num_queries = 10;

    result.result_offsets_.resize(topk * num_queries);
    segment->FillTargetEntry(plan.get(), result);

    auto ans = result.row_data_;
    ASSERT_EQ(ans.size(), topk * num_queries);
    int64_t std_index = 0;
    auto std_vec = dataset.get_col<int64_t>(1);
    for (auto& vec : ans) {
        ASSERT_EQ(vec.size(), sizeof(int64_t));
        int64_t val;
        memcpy(&val, vec.data(), sizeof(int64_t));
        auto internal_offset = result.internal_seg_offsets_[std_index];
        auto std_val = std_vec[internal_offset];
        ASSERT_EQ(val, std_val) << "io:" << internal_offset;
        ++std_index;
    }
}

TEST(Query, ExecWithPredicateBinary) {
    using namespace milvus::query;
    using namespace milvus::segcore;
    auto schema = std::make_shared<Schema>();
    schema->AddDebugField("fakevec", DataType::VECTOR_BINARY, 512, MetricType::METRIC_Jaccard);
    schema->AddDebugField("age", DataType::FLOAT);
    std::string dsl = R"({
        "bool": {
            "must": [
            {
                "range": {
                    "age": {
                        "GE": -1,
                        "LT": 1
                    }
                }
            },
            {
                "vector": {
                    "fakevec": {
                        "metric_type": "Jaccard",
                        "params": {
                            "nprobe": 10
                        },
                        "query": "$0",
                        "topk": 5
                    }
                }
            }
            ]
        }
    })";
    int64_t N = 1000 * 1000;
    auto dataset = DataGen(schema, N);
    auto segment = CreateGrowingSegment(schema);
    segment->PreInsert(N);
    segment->Insert(0, N, dataset.row_ids_.data(), dataset.timestamps_.data(), dataset.raw_);
    auto vec_ptr = dataset.get_col<uint8_t>(0);

    auto plan = CreatePlan(*schema, dsl);
    auto num_queries = 5;
    auto ph_group_raw = CreateBinaryPlaceholderGroupFromBlob(num_queries, 512, vec_ptr.data() + 1024 * 512 / 8);
    auto ph_group = ParsePlaceholderGroup(plan.get(), ph_group_raw.SerializeAsString());
    QueryResult qr;
    Timestamp time = 1000000;
    std::vector<const PlaceholderGroup*> ph_group_arr = {ph_group.get()};
    qr = segment->Search(plan.get(), ph_group_arr.data(), &time, 1);
    int topk = 5;

    Json json = QueryResultToJson(qr);
    std::cout << json.dump(2);
    // ASSERT_EQ(json.dump(2), ref.dump(2));
}