/*
 * Copyright (c) 2021 Huawei Device Co., Ltd.
 * 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 "perf_sample_table.h"

namespace SysTuning {
namespace TraceStreamer {
enum class Index : int32_t {
    ID = 0,
    CALLCHAIN_ID,
    TIMESTAMP,
    THREAD_ID,
    EVENT_COUNT,
    EVENT_TYPE_ID,
    TIMESTAMP_TRACE,
    CPU_ID,
    THREAD_STATE
};
PerfSampleTable::PerfSampleTable(const TraceDataCache* dataCache) : TableBase(dataCache)
{
    tableColumn_.push_back(TableBase::ColumnInfo("id", "INTEGER"));
    tableColumn_.push_back(TableBase::ColumnInfo("callchain_id", "INTEGER"));
    tableColumn_.push_back(TableBase::ColumnInfo("timeStamp", "INTEGER"));
    tableColumn_.push_back(TableBase::ColumnInfo("thread_id", "INTEGER"));
    tableColumn_.push_back(TableBase::ColumnInfo("event_count", "INTEGER"));
    tableColumn_.push_back(TableBase::ColumnInfo("event_type_id", "INTEGER"));
    tableColumn_.push_back(TableBase::ColumnInfo("timestamp_trace", "INTEGER"));
    tableColumn_.push_back(TableBase::ColumnInfo("cpu_id", "INTEGER"));
    tableColumn_.push_back(TableBase::ColumnInfo("thread_state", "TEXT"));
    tablePriKey_.push_back("id");
}

PerfSampleTable::~PerfSampleTable() {}

void PerfSampleTable::FilterByConstraint(FilterConstraints& samplefc,
                                         double& samplefilterCost,
                                         size_t samplerowCount,
                                         uint32_t samplecurrenti)
{
    // To use the EstimateFilterCost function in the TableBase parent class function to calculate the i-value of each
    // for loop
    const auto& samplec = samplefc.GetConstraints()[samplecurrenti];
    switch (static_cast<Index>(samplec.col)) {
        case Index::ID: {
            if (CanFilterId(samplec.op, samplerowCount)) {
                samplefc.UpdateConstraint(samplecurrenti, true);
                samplefilterCost += 1; // id can position by 1 step
            } else {
                samplefilterCost += samplerowCount; // scan all rows
            }
            break;
        }
        default:                                // other column
            samplefilterCost += samplerowCount; // scan all rows
            break;
    }
}

std::unique_ptr<TableBase::Cursor> PerfSampleTable::CreateCursor()
{
    return std::make_unique<Cursor>(dataCache_, this);
}

PerfSampleTable::Cursor::Cursor(const TraceDataCache* dataCache, TableBase* table)
    : TableBase::Cursor(dataCache, table, static_cast<uint32_t>(dataCache->GetConstPerfSampleData().Size())),
      perfSampleObj_(dataCache->GetConstPerfSampleData())
{
}

PerfSampleTable::Cursor::~Cursor() {}

int32_t PerfSampleTable::Cursor::Filter(const FilterConstraints& fc, sqlite3_value** argv)
{
    // reset indexMap_
    indexMap_ = std::make_unique<IndexMap>(0, rowCount_);

    if (rowCount_ <= 0) {
        return SQLITE_OK;
    }

    auto perfSampleCs = fc.GetConstraints();
    std::set<uint32_t> sId = {static_cast<uint32_t>(Index::ID)};
    SwapIndexFront(perfSampleCs, sId);
    for (size_t i = 0; i < perfSampleCs.size(); i++) {
        const auto& c = perfSampleCs[i];
        switch (static_cast<Index>(c.col)) {
            case Index::ID:
                FilterId(c.op, argv[i]);
                break;
            case Index::CALLCHAIN_ID:
                indexMap_->MixRange(c.op, static_cast<uint32_t>(sqlite3_value_int64(argv[i])),
                                    perfSampleObj_.SampleIds());
                break;
            case Index::THREAD_ID:
                indexMap_->MixRange(c.op, static_cast<uint32_t>(sqlite3_value_int64(argv[i])), perfSampleObj_.Tids());
                break;
            case Index::EVENT_TYPE_ID:
                indexMap_->MixRange(c.op, static_cast<uint64_t>(sqlite3_value_int64(argv[i])),
                                    perfSampleObj_.EventTypeIds());
                break;
            case Index::CPU_ID:
                indexMap_->MixRange(c.op, static_cast<uint64_t>(sqlite3_value_int64(argv[i])), perfSampleObj_.CpuIds());
                break;
            default:
                break;
        }
    }
    auto perfSampleOrderbys = fc.GetOrderBys();
    for (auto i = perfSampleOrderbys.size(); i > 0;) {
        i--;
        switch (static_cast<Index>(perfSampleOrderbys[i].iColumn)) {
            case Index::ID:
                indexMap_->SortBy(perfSampleOrderbys[i].desc);
                break;
            default:
                break;
        }
    }

    return SQLITE_OK;
}

int32_t PerfSampleTable::Cursor::Column(int32_t column) const
{
    switch (static_cast<Index>(column)) {
        case Index::ID:
            sqlite3_result_int64(context_, static_cast<int32_t>(perfSampleObj_.IdsData()[CurrentRow()]));
            break;
        case Index::CALLCHAIN_ID:
            if (perfSampleObj_.SampleIds()[CurrentRow()] != INVALID_UINT32) {
                sqlite3_result_int64(context_, static_cast<int64_t>(perfSampleObj_.SampleIds()[CurrentRow()]));
            } else {
                sqlite3_result_int64(context_, static_cast<int64_t>(INVALID_CALL_CHAIN_ID));
            }
            break;
        case Index::TIMESTAMP:
            sqlite3_result_int64(context_, static_cast<int64_t>(perfSampleObj_.TimeStampData()[CurrentRow()]));
            break;
        case Index::THREAD_ID:
            sqlite3_result_int64(context_, static_cast<int64_t>(perfSampleObj_.Tids()[CurrentRow()]));
            break;
        case Index::EVENT_COUNT:
            sqlite3_result_int64(context_, static_cast<int64_t>(perfSampleObj_.EventCounts()[CurrentRow()]));
            break;
        case Index::EVENT_TYPE_ID:
            sqlite3_result_int64(context_, static_cast<int64_t>(perfSampleObj_.EventTypeIds()[CurrentRow()]));
            break;
        case Index::TIMESTAMP_TRACE:
            sqlite3_result_int64(context_, static_cast<int64_t>(perfSampleObj_.TimestampTraces()[CurrentRow()]));
            break;
        case Index::CPU_ID:
            sqlite3_result_int64(context_, static_cast<int64_t>(perfSampleObj_.CpuIds()[CurrentRow()]));
            break;
        case Index::THREAD_STATE:
            if (perfSampleObj_.ThreadStates()[CurrentRow()] != INVALID_UINT64) {
                auto threadStateIndex = static_cast<size_t>(perfSampleObj_.ThreadStates()[CurrentRow()]);
                sqlite3_result_text(context_, dataCache_->GetDataFromDict(threadStateIndex).c_str(), STR_DEFAULT_LEN,
                                    nullptr);
            }
            break;
        default:
            TS_LOGF("Unregistered column : %d", column);
            break;
    }
    return SQLITE_OK;
}

void PerfSampleTable::GetOrbyes(FilterConstraints& samplefc, EstimatedIndexInfo& sampleei)
{
    auto sampleorderbys = samplefc.GetOrderBys();
    for (auto i = 0; i < sampleorderbys.size(); i++) {
        switch (static_cast<Index>(sampleorderbys[i].iColumn)) {
            case Index::ID:
                break;
            default: // other columns can be sorted by SQLite
                sampleei.isOrdered = false;
                break;
        }
    }
}
} // namespace TraceStreamer
} // namespace SysTuning