#include <array>
#include <Columns/ColumnArray.h>
#include <Columns/ColumnFixedString.h>
#include <Columns/ColumnString.h>
#include <Columns/ColumnsNumber.h>
#include <DataTypes/DataTypeArray.h>
#include <DataTypes/DataTypeDateTime64.h>
#include <DataTypes/DataTypeDate.h>
#include <DataTypes/DataTypeNullable.h>
#include <DataTypes/DataTypeDateTime.h>
#include <DataTypes/DataTypeEnum.h>
#include <DataTypes/DataTypeFactory.h>
#include <DataTypes/DataTypeLowCardinality.h>
#include <DataTypes/DataTypeString.h>
#include <DataTypes/DataTypesNumber.h>
#include <Interpreters/ProfileEventsExt.h>
#include <Interpreters/QueryLog.h>
#include <Poco/Net/IPAddress.h>
#include <Common/ClickHouseRevision.h>
#include <Common/IPv6ToBinary.h>
#include <Common/ProfileEvents.h>


namespace DB
{

Block QueryLogElement::createBlock()
{
    auto query_status_datatype = std::make_shared<DataTypeEnum8>(
        DataTypeEnum8::Values
        {
            {"QueryStart",                  static_cast<Int8>(QUERY_START)},
            {"QueryFinish",                 static_cast<Int8>(QUERY_FINISH)},
            {"ExceptionBeforeStart",        static_cast<Int8>(EXCEPTION_BEFORE_START)},
            {"ExceptionWhileProcessing",    static_cast<Int8>(EXCEPTION_WHILE_PROCESSING)}
        });

    return
    {
        {std::move(query_status_datatype),                                    "type"},
        {std::make_shared<DataTypeDate>(),                                    "event_date"},
        {std::make_shared<DataTypeDateTime>(),                                "event_time"},
        {std::make_shared<DataTypeDateTime64>(6),                             "event_time_microseconds"},
        {std::make_shared<DataTypeDateTime>(),                                "query_start_time"},
        {std::make_shared<DataTypeDateTime64>(6),                             "query_start_time_microseconds"},
        {std::make_shared<DataTypeUInt64>(),                                  "query_duration_ms"},

        {std::make_shared<DataTypeUInt64>(),                                  "read_rows"},
        {std::make_shared<DataTypeUInt64>(),                                  "read_bytes"},
        {std::make_shared<DataTypeUInt64>(),                                  "written_rows"},
        {std::make_shared<DataTypeUInt64>(),                                  "written_bytes"},
        {std::make_shared<DataTypeUInt64>(),                                  "result_rows"},
        {std::make_shared<DataTypeUInt64>(),                                  "result_bytes"},
        {std::make_shared<DataTypeUInt64>(),                                  "memory_usage"},

        {std::make_shared<DataTypeString>(),                                  "current_database"},
        {std::make_shared<DataTypeString>(),                                  "query"},
        {std::make_shared<DataTypeUInt64>(),                                  "normalized_query_hash"},
        {std::make_shared<DataTypeLowCardinality>(std::make_shared<DataTypeString>()), "query_kind"},
        {std::make_shared<DataTypeArray>(
            std::make_shared<DataTypeLowCardinality>(std::make_shared<DataTypeString>())), "databases"},
        {std::make_shared<DataTypeArray>(
            std::make_shared<DataTypeLowCardinality>(std::make_shared<DataTypeString>())), "tables"},
        {std::make_shared<DataTypeArray>(
            std::make_shared<DataTypeLowCardinality>(std::make_shared<DataTypeString>())), "columns"},
        {std::make_shared<DataTypeArray>(
            std::make_shared<DataTypeLowCardinality>(std::make_shared<DataTypeString>())), "projections"},
        {std::make_shared<DataTypeInt32>(),                                   "exception_code"},
        {std::make_shared<DataTypeString>(),                                  "exception"},
        {std::make_shared<DataTypeString>(),                                  "stack_trace"},

        {std::make_shared<DataTypeUInt8>(),                                   "is_initial_query"},
        {std::make_shared<DataTypeString>(),                                  "user"},
        {std::make_shared<DataTypeString>(),                                  "query_id"},
        {DataTypeFactory::instance().get("IPv6"),                             "address"},
        {std::make_shared<DataTypeUInt16>(),                                  "port"},
        {std::make_shared<DataTypeString>(),                                  "initial_user"},
        {std::make_shared<DataTypeString>(),                                  "initial_query_id"},
        {DataTypeFactory::instance().get("IPv6"),                             "initial_address"},
        {std::make_shared<DataTypeUInt16>(),                                  "initial_port"},
        {std::make_shared<DataTypeUInt8>(),                                   "interface"},
        {std::make_shared<DataTypeString>(),                                  "os_user"},
        {std::make_shared<DataTypeString>(),                                  "client_hostname"},
        {std::make_shared<DataTypeString>(),                                  "client_name"},
        {std::make_shared<DataTypeUInt32>(),                                  "client_revision"},
        {std::make_shared<DataTypeUInt32>(),                                  "client_version_major"},
        {std::make_shared<DataTypeUInt32>(),                                  "client_version_minor"},
        {std::make_shared<DataTypeUInt32>(),                                  "client_version_patch"},
        {std::make_shared<DataTypeUInt8>(),                                   "http_method"},
        {std::make_shared<DataTypeString>(),                                  "http_user_agent"},
        {std::make_shared<DataTypeString>(),                                  "http_referer"},
        {std::make_shared<DataTypeString>(),                                  "forwarded_for"},
        {std::make_shared<DataTypeString>(),                                  "quota_key"},

        {std::make_shared<DataTypeUInt32>(),                                  "revision"},

        {std::make_shared<DataTypeString>(),                                  "log_comment"},

        {std::make_shared<DataTypeArray>(std::make_shared<DataTypeUInt64>()), "thread_ids"},
        {std::make_shared<DataTypeArray>(std::make_shared<DataTypeString>()), "ProfileEvents.Names"},
        {std::make_shared<DataTypeArray>(std::make_shared<DataTypeUInt64>()), "ProfileEvents.Values"},
        {std::make_shared<DataTypeArray>(std::make_shared<DataTypeString>()), "Settings.Names"},
        {std::make_shared<DataTypeArray>(std::make_shared<DataTypeString>()), "Settings.Values"},

        {std::make_shared<DataTypeArray>(std::make_shared<DataTypeString>()), "used_aggregate_functions"},
        {std::make_shared<DataTypeArray>(std::make_shared<DataTypeString>()), "used_aggregate_function_combinators"},
        {std::make_shared<DataTypeArray>(std::make_shared<DataTypeString>()), "used_database_engines"},
        {std::make_shared<DataTypeArray>(std::make_shared<DataTypeString>()), "used_data_type_families"},
        {std::make_shared<DataTypeArray>(std::make_shared<DataTypeString>()), "used_dictionaries"},
        {std::make_shared<DataTypeArray>(std::make_shared<DataTypeString>()), "used_formats"},
        {std::make_shared<DataTypeArray>(std::make_shared<DataTypeString>()), "used_functions"},
        {std::make_shared<DataTypeArray>(std::make_shared<DataTypeString>()), "used_storages"},
        {std::make_shared<DataTypeArray>(std::make_shared<DataTypeString>()), "used_table_functions"}
    };

}


void QueryLogElement::appendToBlock(MutableColumns & columns) const
{
    size_t i = 0;

    columns[i++]->insert(type);
    columns[i++]->insert(DateLUT::instance().toDayNum(event_time).toUnderType());
    columns[i++]->insert(event_time);
    columns[i++]->insert(event_time_microseconds);
    columns[i++]->insert(query_start_time);
    columns[i++]->insert(query_start_time_microseconds);
    columns[i++]->insert(query_duration_ms);

    columns[i++]->insert(read_rows);
    columns[i++]->insert(read_bytes);
    columns[i++]->insert(written_rows);
    columns[i++]->insert(written_bytes);
    columns[i++]->insert(result_rows);
    columns[i++]->insert(result_bytes);

    columns[i++]->insert(memory_usage);

    columns[i++]->insertData(current_database.data(), current_database.size());
    columns[i++]->insertData(query.data(), query.size());
    columns[i++]->insert(normalized_query_hash);
    columns[i++]->insertData(query_kind.data(), query_kind.size());

    {
        auto & column_databases = typeid_cast<ColumnArray &>(*columns[i++]);
        auto & column_tables = typeid_cast<ColumnArray &>(*columns[i++]);
        auto & column_columns = typeid_cast<ColumnArray &>(*columns[i++]);
        auto & column_projections = typeid_cast<ColumnArray &>(*columns[i++]);

        auto fill_column = [](const std::set<String> & data, ColumnArray & column)
        {
            size_t size = 0;
            for (const auto & name : data)
            {
                column.getData().insertData(name.data(), name.size());
                ++size;
            }
            auto & offsets = column.getOffsets();
            offsets.push_back(offsets.back() + size);
        };

        fill_column(query_databases, column_databases);
        fill_column(query_tables, column_tables);
        fill_column(query_columns, column_columns);
        fill_column(query_projections, column_projections);
    }

    columns[i++]->insert(exception_code);
    columns[i++]->insertData(exception.data(), exception.size());
    columns[i++]->insertData(stack_trace.data(), stack_trace.size());

    appendClientInfo(client_info, columns, i);

    columns[i++]->insert(ClickHouseRevision::getVersionRevision());

    columns[i++]->insertData(log_comment.data(), log_comment.size());

    {
        Array threads_array;
        threads_array.reserve(thread_ids.size());
        for (const UInt64 thread_id : thread_ids)
            threads_array.emplace_back(thread_id);
        columns[i++]->insert(threads_array);
    }

    if (profile_counters)
    {
        auto * column_names = columns[i++].get();
        auto * column_values = columns[i++].get();
        ProfileEvents::dumpToArrayColumns(*profile_counters, column_names, column_values, true);
    }
    else
    {
        columns[i++]->insertDefault();
        columns[i++]->insertDefault();
    }

    if (query_settings)
    {
        auto * column_names = columns[i++].get();
        auto * column_values = columns[i++].get();
        query_settings->dumpToArrayColumns(column_names, column_values, true);
    }
    else
    {
        columns[i++]->insertDefault();
        columns[i++]->insertDefault();
    }

    {
        auto & column_aggregate_function_factory_objects = typeid_cast<ColumnArray &>(*columns[i++]);
        auto & column_aggregate_function_combinator_factory_objects = typeid_cast<ColumnArray &>(*columns[i++]);
        auto & column_database_factory_objects = typeid_cast<ColumnArray &>(*columns[i++]);
        auto & column_data_type_factory_objects = typeid_cast<ColumnArray &>(*columns[i++]);
        auto & column_dictionary_factory_objects = typeid_cast<ColumnArray &>(*columns[i++]);
        auto & column_format_factory_objects = typeid_cast<ColumnArray &>(*columns[i++]);
        auto & column_function_factory_objects = typeid_cast<ColumnArray &>(*columns[i++]);
        auto & column_storage_factory_objects = typeid_cast<ColumnArray &>(*columns[i++]);
        auto & column_table_function_factory_objects = typeid_cast<ColumnArray &>(*columns[i++]);

        auto fill_column = [](const std::unordered_set<String> & data, ColumnArray & column)
        {
            size_t size = 0;
            for (const auto & name : data)
            {
                column.getData().insertData(name.data(), name.size());
                ++size;
            }
            auto & offsets = column.getOffsets();
            offsets.push_back(offsets.back() + size);
        };

        fill_column(used_aggregate_functions, column_aggregate_function_factory_objects);
        fill_column(used_aggregate_function_combinators, column_aggregate_function_combinator_factory_objects);
        fill_column(used_database_engines, column_database_factory_objects);
        fill_column(used_data_type_families, column_data_type_factory_objects);
        fill_column(used_dictionaries, column_dictionary_factory_objects);
        fill_column(used_formats, column_format_factory_objects);
        fill_column(used_functions, column_function_factory_objects);
        fill_column(used_storages, column_storage_factory_objects);
        fill_column(used_table_functions, column_table_function_factory_objects);
    }
}

void QueryLogElement::appendClientInfo(const ClientInfo & client_info, MutableColumns & columns, size_t & i)
{
    columns[i++]->insert(client_info.query_kind == ClientInfo::QueryKind::INITIAL_QUERY);

    columns[i++]->insert(client_info.current_user);
    columns[i++]->insert(client_info.current_query_id);
    columns[i++]->insertData(IPv6ToBinary(client_info.current_address.host()).data(), 16);
    columns[i++]->insert(client_info.current_address.port());

    columns[i++]->insert(client_info.initial_user);
    columns[i++]->insert(client_info.initial_query_id);
    columns[i++]->insertData(IPv6ToBinary(client_info.initial_address.host()).data(), 16);
    columns[i++]->insert(client_info.initial_address.port());

    columns[i++]->insert(UInt64(client_info.interface));

    columns[i++]->insert(client_info.os_user);
    columns[i++]->insert(client_info.client_hostname);
    columns[i++]->insert(client_info.client_name);
    columns[i++]->insert(client_info.client_tcp_protocol_version);
    columns[i++]->insert(client_info.client_version_major);
    columns[i++]->insert(client_info.client_version_minor);
    columns[i++]->insert(client_info.client_version_patch);

    columns[i++]->insert(UInt64(client_info.http_method));
    columns[i++]->insert(client_info.http_user_agent);
    columns[i++]->insert(client_info.http_referer);
    columns[i++]->insert(client_info.forwarded_for);

    columns[i++]->insert(client_info.quota_key);
}
}