// Licensed to the Apache Software Foundation (ASF) under one

// or more contributor license agreements.  See the NOTICE file

// distributed with this work for additional information

// regarding copyright ownership.  The ASF licenses this file

// to you 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 "exec/sink/writer/vfile_result_writer.h"

#include <fmt/format.h>

#include <gen_cpp/Data_types.h>

#include <gen_cpp/Metrics_types.h>

#include <gen_cpp/PaloInternalService_types.h>

#include <gen_cpp/PlanNodes_types.h>

#include <glog/logging.h>

#include <ostream>

#include <utility>

#include "common/compiler_util.h" // IWYU pragma: keep

#include "common/consts.h"

#include "common/status.h"

#include "core/block/block.h"

#include "core/column/column_string.h"

#include "core/column/column_vector.h"

#include "core/data_type/define_primitive_type.h"

#include "core/data_type/primitive_type.h"

#include "core/value/decimalv2_value.h"

#include "core/value/large_int_value.h"

#include "exec/operator/result_sink_operator.h"

#include "exec/sink/writer/vmysql_result_writer.h"

#include "exprs/function/cast/cast_to_string.h"

#include "exprs/vexpr.h"

#include "exprs/vexpr_context.h"

#include "format/transformer/vcsv_transformer.h"

#include "format/transformer/vnative_transformer.h"

#include "format/transformer/vorc_transformer.h"

#include "format/transformer/vparquet_transformer.h"

#include "io/file_factory.h"

#include "io/fs/broker_file_system.h"

#include "io/fs/file_system.h"

#include "io/fs/file_writer.h"

#include "io/fs/hdfs_file_system.h"

#include "io/fs/local_file_system.h"

#include "io/fs/s3_file_system.h"

#include "io/hdfs_builder.h"

#include "runtime/descriptors.h"

#include "runtime/result_block_buffer.h"

#include "runtime/runtime_state.h"

#include "service/backend_options.h"

#include "util/mysql_row_buffer.h"

#include "util/s3_uri.h"

#include "util/s3_util.h"

#include "util/uid_util.h"

namespace doris {

static double nons_to_second = 1000000000.00;

VFileResultWriter::VFileResultWriter(const TDataSink& t_sink, const VExprContextSPtrs& output_exprs,

                                     std::shared_ptr<Dependency> dep,

                                     std::shared_ptr<Dependency> fin_dep)

        : AsyncResultWriter(output_exprs, dep, fin_dep) {}

VFileResultWriter::VFileResultWriter(

        const ResultFileOptions* file_opts, const TStorageBackendType::type storage_type,

        const TUniqueId fragment_instance_id, const VExprContextSPtrs& output_vexpr_ctxs,

        std::shared_ptr<ResultBlockBufferBase> sinker, Block* output_block, bool output_object_data,

        const RowDescriptor& output_row_descriptor, std::shared_ptr<Dependency> dep,

        std::shared_ptr<Dependency> fin_dep)

        : AsyncResultWriter(output_vexpr_ctxs, dep, fin_dep),

          _file_opts(file_opts),

          _storage_type(storage_type),

          _fragment_instance_id(fragment_instance_id),

          _sinker(std::dynamic_pointer_cast<MySQLResultBlockBuffer>(sinker)),

          _output_block(output_block),

          _output_row_descriptor(output_row_descriptor) {

    _output_object_data = output_object_data;

}

Status VFileResultWriter::open(RuntimeState* state, RuntimeProfile* profile) {

    _state = state;

    _init_profile(profile);

    // check orc writer version

    if (_file_opts->file_format == TFileFormatType::FORMAT_ORC &&

        _file_opts->orc_writer_version < 1) {

        return Status::InternalError("orc writer version is less than 1.");

    }

    // Deprecated compatibility path. New FE already deletes the target directory in FE

    // and clears delete_existing_files before BE execution. Keep this branch only for

    // requests from older FE versions during rolling upgrade.

    if (_file_opts->delete_existing_files) {

        RETURN_IF_ERROR(_delete_dir());

    }

    return _create_next_file_writer();

}

void VFileResultWriter::_init_profile(RuntimeProfile* parent_profile) {

    RuntimeProfile* profile = parent_profile->create_child("VFileResultWriter", true, true);

    _append_row_batch_timer = ADD_TIMER(profile, "AppendBatchTime");

    _convert_tuple_timer = ADD_CHILD_TIMER(profile, "TupleConvertTime", "AppendBatchTime");

    _file_write_timer = ADD_CHILD_TIMER(profile, "FileWriteTime", "AppendBatchTime");

    _writer_close_timer = ADD_TIMER(profile, "FileWriterCloseTime");

    _written_rows_counter = ADD_COUNTER(profile, "NumWrittenRows", TUnit::UNIT);

    _written_data_bytes = ADD_COUNTER(profile, "WrittenDataBytes", TUnit::BYTES);

}

Status VFileResultWriter::_create_next_file_writer() {

    std::string file_name;

    RETURN_IF_ERROR(_get_next_file_name(&file_name));

    return _create_file_writer(file_name);

}

Status VFileResultWriter::_create_file_writer(const std::string& file_name) {

    auto file_type = DORIS_TRY(FileFactory::convert_storage_type(_storage_type));

    _file_writer_impl = DORIS_TRY(FileFactory::create_file_writer(

            file_type, _state->exec_env(), _file_opts->broker_addresses,

            _file_opts->broker_properties, file_name,

            {

                    .write_file_cache = false,

                    .sync_file_data = false,

            }));

    switch (_file_opts->file_format) {

    case TFileFormatType::FORMAT_CSV_PLAIN:

        _vfile_writer.reset(new VCSVTransformer(

                _state, _file_writer_impl.get(), _vec_output_expr_ctxs, _output_object_data,

                _header_type, _header, _file_opts->column_separator, _file_opts->line_delimiter,

                _file_opts->with_bom, _file_opts->compression_type));

        break;

    case TFileFormatType::FORMAT_PARQUET:

        _vfile_writer.reset(new VParquetTransformer(

                _state, _file_writer_impl.get(), _vec_output_expr_ctxs, _file_opts->parquet_schemas,

                _output_object_data,

                {_file_opts->parquet_commpression_type, _file_opts->parquet_version,

                 _file_opts->parquert_disable_dictionary, _file_opts->enable_int96_timestamps}));

        break;

    case TFileFormatType::FORMAT_ORC:

        _vfile_writer.reset(new VOrcTransformer(

                _state, _file_writer_impl.get(), _vec_output_expr_ctxs, _file_opts->orc_schema, {},

                _output_object_data, _file_opts->orc_compression_type));

        break;

    case TFileFormatType::FORMAT_NATIVE:

        // Doris Native binary format writer with configurable compression.

        _vfile_writer.reset(new VNativeTransformer(_state, _file_writer_impl.get(),

                                                   _vec_output_expr_ctxs, _output_object_data,

                                                   _file_opts->compression_type));

        break;

    default:

        return Status::InternalError("unsupported file format: {}", _file_opts->file_format);

    }

    LOG(INFO) << "create file for exporting query result. file name: " << file_name

              << ". query id: " << print_id(_state->query_id())

              << " format:" << _file_opts->file_format;

    return _vfile_writer->open();

}

// file name format as: my_prefix_{fragment_instance_id}_0.csv

Status VFileResultWriter::_get_next_file_name(std::string* file_name) {

    std::string suffix =

            _file_opts->file_suffix.empty() ? _file_format_to_name() : _file_opts->file_suffix;

    std::stringstream ss;

    ss << _file_opts->file_path << print_id(_fragment_instance_id) << "_" << (_file_idx++) << "."

       << suffix;

    *file_name = ss.str();

    if (_storage_type == TStorageBackendType::LOCAL) {

        // For local file writer, the file_path is a local dir.

        // Here we do a simple security verification by checking whether the file exists.

        // Because the file path is currently arbitrarily specified by the user,

        // Doris is not responsible for ensuring the correctness of the path.

        // This is just to prevent overwriting the existing file.

        bool exists = true;

        RETURN_IF_ERROR(io::global_local_filesystem()->exists(*file_name, &exists));

        if (exists) {

            return Status::InternalError("File already exists: {}", *file_name);

        }

    }

    return Status::OK();

}

// file url format as:

// LOCAL: file:///localhost_address/{file_path}{fragment_instance_id}_

// S3: {file_path}{fragment_instance_id}_

// BROKER: {file_path}{fragment_instance_id}_

void VFileResultWriter::_get_file_url(std::string* file_url) {

    std::stringstream ss;

    if (_storage_type == TStorageBackendType::LOCAL) {

        ss << "file:///" << BackendOptions::get_localhost();

    }

    ss << _file_opts->file_path;

    ss << print_id(_fragment_instance_id) << "_";

    *file_url = ss.str();

}

std::string VFileResultWriter::_file_format_to_name() {

    switch (_file_opts->file_format) {

    case TFileFormatType::FORMAT_CSV_PLAIN:

        return "csv" + _compression_type_to_name();

    case TFileFormatType::FORMAT_PARQUET:

        return "parquet";

    case TFileFormatType::FORMAT_ORC:

        return "orc";

    case TFileFormatType::FORMAT_NATIVE:

        return "native";

    default:

        return "unknown";

    }

}

std::string VFileResultWriter::_compression_type_to_name() {

    switch (_file_opts->compression_type) {

    case TFileCompressType::GZ:

        return ".gz";

    case TFileCompressType::BZ2:

        return ".bz2";

    case TFileCompressType::SNAPPYBLOCK:

        return ".snappy";

    case TFileCompressType::LZ4BLOCK:

        return ".lz4";

    case TFileCompressType::ZSTD:

        return ".zstd";

    default:

        return "";

    }

}

Status VFileResultWriter::write(RuntimeState* state, Block& block) {

    if (block.rows() == 0) {

        return Status::OK();

    }

    SCOPED_TIMER(_append_row_batch_timer);

    Block output_block;

    RETURN_IF_ERROR(_projection_block(block, &output_block));

    RETURN_IF_ERROR(_write_file(output_block));

    _written_rows += block.rows();

    return Status::OK();

}

Status VFileResultWriter::_write_file(const Block& block) {

    {

        SCOPED_TIMER(_file_write_timer);

        RETURN_IF_ERROR(_vfile_writer->write(block));

    }

    // split file if exceed limit

    // the written len from file writer may not be updated in real-time,

    // because for orc writer, the orc OutputStream only flush when

    // bufferred data is larger than strip size(default 64MB).

    // So even if max_file_size_bytes set to 5MB, the file size will still

    // be 64MB.

    // TODO: opt this logic

    _current_written_bytes = _vfile_writer->written_len();

    return _create_new_file_if_exceed_size();

}

Status VFileResultWriter::_create_new_file_if_exceed_size() {

    if (_current_written_bytes < _file_opts->max_file_size_bytes) {

        return Status::OK();

    }

    // current file size exceed the max file size. close this file

    // and create new one

    {

        SCOPED_TIMER(_writer_close_timer);

        RETURN_IF_ERROR(_close_file_writer(false));

    }

    _current_written_bytes = 0;

    return Status::OK();

}

Status VFileResultWriter::_close_file_writer(bool done) {

    if (_vfile_writer) {

        RETURN_IF_ERROR(_vfile_writer->close());

        // we can not use _current_written_bytes to COUNTER_UPDATE(_written_data_bytes, _current_written_bytes)

        // because it will call `write()` function of orc/parquet function in `_vfile_writer->close()`

        // and the real written_len will increase

        // and _current_written_bytes will less than _vfile_writer->written_len()

        COUNTER_UPDATE(_written_data_bytes, _vfile_writer->written_len());

        _vfile_writer.reset(nullptr);

    } else if (_file_writer_impl && _file_writer_impl->state() != io::FileWriter::State::CLOSED) {

        RETURN_IF_ERROR(_file_writer_impl->close());

    }

    if (!done) {

        // not finished, create new file writer for next file

        RETURN_IF_ERROR(_create_next_file_writer());

    } else {

        // All data is written to file, send statistic result

        if (_output_block == nullptr) {

            RETURN_IF_ERROR(_send_result());

        } else {

            RETURN_IF_ERROR(_fill_result_block());

        }

    }

    return Status::OK();

}

template <typename SRC>

void direct_write_to_mysql_result_int(std::string& mysql_rows, const SRC& value) {

    auto str = CastToString::from_number(value);

    direct_write_to_mysql_result_string(mysql_rows, str.c_str(), str.size());

}

Unexecuted instantiation: _ZN5doris32direct_write_to_mysql_result_intIiEEvRNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKT_

Unexecuted instantiation: _ZN5doris32direct_write_to_mysql_result_intIlEEvRNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKT_

Status VFileResultWriter::_send_result() {

    if (_is_result_sent) {

        return Status::OK();

    }

    _is_result_sent = true;

    // The final stat result include:

    // | FileNumber      | Int     |

    // | TotalRows       | Bigint  |

    // | FileSize        | Bigint  |

    // | URL             | Varchar |

    // | WriteTimeSec    | Varchar |

    // | WriteSpeedKB    | Varchar |

    // The type of these field should be consistent with types defined in OutFileClause.java of FE.

    auto result = std::make_shared<TFetchDataResult>();

    result->result_batch.rows.resize(1);

    auto& mysql_output = result->result_batch.rows[0];

    direct_write_to_mysql_result_int(mysql_output, _file_idx);                      // FileNumber

    direct_write_to_mysql_result_int(mysql_output, _written_rows_counter->value()); // TotalRows

    direct_write_to_mysql_result_int(mysql_output, _written_data_bytes->value());   // FileSize

    std::string file_url;

    _get_file_url(&file_url);

    std::stringstream ss;

    ss << file_url << "*";

    file_url = ss.str();

    direct_write_to_mysql_result_string(mysql_output, file_url.c_str(),

                                        file_url.length()); // URL

    double write_time = _file_write_timer->value() / nons_to_second;

    std::string formatted_write_time = fmt::format("{:.3f}", write_time);

    direct_write_to_mysql_result_string(mysql_output, formatted_write_time.c_str(),

                                        formatted_write_time.length()); // WriteTimeSec

    double write_speed = _get_write_speed(_written_data_bytes->value(), _file_write_timer->value());

    std::string formatted_write_speed = fmt::format("{:.2f}", write_speed);

    direct_write_to_mysql_result_string(mysql_output, formatted_write_speed.c_str(),

                                        formatted_write_speed.length()); // WriteSpeedKB

    std::map<std::string, std::string> attach_infos;

    attach_infos.insert(std::make_pair("FileNumber", std::to_string(_file_idx)));

    attach_infos.insert(

            std::make_pair("TotalRows", std::to_string(_written_rows_counter->value())));

    attach_infos.insert(std::make_pair("FileSize", std::to_string(_written_data_bytes->value())));

    attach_infos.insert(std::make_pair("URL", file_url));

    attach_infos.insert(std::make_pair("WriteTimeSec", formatted_write_time));

    attach_infos.insert(std::make_pair("WriteSpeedKB", formatted_write_speed));

    result->result_batch.__set_attached_infos(attach_infos);

    RETURN_NOT_OK_STATUS_WITH_WARN(_sinker->add_batch(_state, result),

                                   "failed to send outfile result");

    return Status::OK();

}

Status VFileResultWriter::_fill_result_block() {

    if (_is_result_sent) {

        return Status::OK();

    }

    _is_result_sent = true;

#ifndef INSERT_TO_COLUMN

#define INSERT_TO_COLUMN                                                                    \

    if (i == 0) {                                                                           \

        column->insert_data(reinterpret_cast<const char*>(&_file_idx), 0);                  \

    } else if (i == 1) {                                                                    \

        int64_t written_rows = _written_rows_counter->value();                              \

        column->insert_data(reinterpret_cast<const char*>(&written_rows), 0);               \

    } else if (i == 2) {                                                                    \

        int64_t written_data_bytes = _written_data_bytes->value();                          \

        column->insert_data(reinterpret_cast<const char*>(&written_data_bytes), 0);         \

    } else if (i == 3) {                                                                    \

        std::string file_url;                                                               \

        static_cast<void>(_get_file_url(&file_url));                                        \

        column->insert_data(file_url.c_str(), file_url.size());                             \

    } else if (i == 4) {                                                                    \

        double write_time = _file_write_timer->value() / nons_to_second;                    \

        std::string formatted_write_time = fmt::format("{:.3f}", write_time);               \

        column->insert_data(formatted_write_time.c_str(), formatted_write_time.size());     \

    } else if (i == 5) {                                                                    \

        double write_speed =                                                                \

                _get_write_speed(_written_data_bytes->value(), _file_write_timer->value()); \

        std::string formatted_write_speed = fmt::format("{:.2f}", write_speed);             \

        column->insert_data(formatted_write_speed.c_str(), formatted_write_speed.size());   \

    }                                                                                       \

    _output_block->replace_by_position(i, std::move(column));

#endif

    for (int i = 0; i < _output_block->columns(); i++) {

        switch (_output_row_descriptor.tuple_descriptors()[0]

                        ->slots()[i]

                        ->type()

                        ->get_primitive_type()) {

        case TYPE_INT: {

            auto column = ColumnInt32::create();

            INSERT_TO_COLUMN;

            break;

        }

        case TYPE_BIGINT: {

            auto column = ColumnInt64::create();

            INSERT_TO_COLUMN;

            break;

        }

        case TYPE_VARCHAR:

        case TYPE_CHAR:

        case TYPE_STRING: {

            auto column = ColumnString::create();

            INSERT_TO_COLUMN;

            break;

        }

        default:

            return Status::InternalError("Invalid type to print: {}",

                                         _output_row_descriptor.tuple_descriptors()[0]

                                                 ->slots()[i]

                                                 ->type()

                                                 ->get_primitive_type());

        }

    }

    return Status::OK();

}

Status VFileResultWriter::_delete_dir() {

    // get dir of file_path

    std::string dir = _file_opts->file_path.substr(0, _file_opts->file_path.find_last_of('/') + 1);

    switch (_storage_type) {

    case TStorageBackendType::LOCAL:

        return io::global_local_filesystem()->delete_directory(dir);

    case TStorageBackendType::BROKER: {

        auto fs = DORIS_TRY(io::BrokerFileSystem::create(_file_opts->broker_addresses[0],

                                                         _file_opts->broker_properties,

                                                         io::FileSystem::TMP_FS_ID));

        return fs->delete_directory(dir);

    }

    case TStorageBackendType::HDFS: {

        THdfsParams hdfs_params = parse_properties(_file_opts->broker_properties);

        auto fs = DORIS_TRY(io::HdfsFileSystem::create(hdfs_params, hdfs_params.fs_name,

                                                       io::FileSystem::TMP_FS_ID, nullptr));

        return fs->delete_directory(dir);

    }

    case TStorageBackendType::S3: {

        S3URI s3_uri(dir);

        RETURN_IF_ERROR(s3_uri.parse());

        S3Conf s3_conf;

        std::shared_ptr<io::S3FileSystem> s3_fs = nullptr;

        RETURN_IF_ERROR(S3ClientFactory::convert_properties_to_s3_conf(

                _file_opts->broker_properties, s3_uri, &s3_conf));

        auto fs = DORIS_TRY(io::S3FileSystem::create(s3_conf, io::FileSystem::TMP_FS_ID));

        return fs->delete_directory(dir);

    }

    default:

        return Status::NotSupported("Unsupported storage type: {}", std::to_string(_storage_type));

    }

}

double VFileResultWriter::_get_write_speed(int64_t write_bytes, int64_t write_time) {

    if (write_time <= 0) {

        return 0;

    }

    // KB / s

    return ((write_bytes * nons_to_second) / (write_time)) / 1024;

}

Status VFileResultWriter::close(Status exec_status) {

    Status st = exec_status;

    if (st.ok()) {

        // the following 2 profile "_written_rows_counter" and "_writer_close_timer"

        // must be outside the `_close_file_writer()`.

        // because `_close_file_writer()` may be called in deconstructor,

        // at that time, the RuntimeState may already been deconstructed,

        // so does the profile in RuntimeState.

        if (_written_rows_counter) {

            COUNTER_SET(_written_rows_counter, _written_rows);

            SCOPED_TIMER(_writer_close_timer);

        }

        st = _close_file_writer(true);

    }

    return st;

}

} // namespace doris