// 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 "format/table/paimon_jni_reader.h"

#include <map>

#include "core/types.h"

#include "runtime/descriptors.h"

#include "runtime/runtime_state.h"

namespace doris {

class RuntimeProfile;

class RuntimeState;

class Block;

} // namespace doris

namespace doris {

#include "common/compile_check_begin.h"

const std::string PaimonJniReader::PAIMON_OPTION_PREFIX = "paimon.";

const std::string PaimonJniReader::HADOOP_OPTION_PREFIX = "hadoop.";

PaimonJniReader::PaimonJniReader(const std::vector<SlotDescriptor*>& file_slot_descs,

                                 RuntimeState* state, RuntimeProfile* profile,

                                 const TFileRangeDesc& range,

                                 const TFileScanRangeParams* range_params)

        : JniReader(file_slot_descs, state, profile) {

    std::vector<std::string> column_names;

    std::vector<std::string> column_types;

    for (const auto& desc : _file_slot_descs) {

        column_names.emplace_back(desc->col_name());

        column_types.emplace_back(JniConnector::get_jni_type_with_different_string(desc->type()));

    }

    const auto& paimon_params = range.table_format_params.paimon_params;

    std::map<String, String> params;

    params["paimon_split"] = paimon_params.paimon_split;

    if (range_params->__isset.paimon_predicate && !range_params->paimon_predicate.empty()) {

        params["paimon_predicate"] = range_params->paimon_predicate;

    } else if (paimon_params.__isset.paimon_predicate) {

        // Fallback to split level paimon_predicate for backward compatibility

        params["paimon_predicate"] = paimon_params.paimon_predicate;

    }

    params["required_fields"] = join(column_names, ",");

    params["columns_types"] = join(column_types, "#");

    params["time_zone"] = _state->timezone();

    if (range_params->__isset.serialized_table) {

        params["serialized_table"] = range_params->serialized_table;

    }

    if (range.table_format_params.__isset.table_level_row_count) {

        _remaining_table_level_row_count = range.table_format_params.table_level_row_count;

    } else {

        _remaining_table_level_row_count = -1;

    }

    // Used to create paimon option

    for (const auto& kv : paimon_params.paimon_options) {

        params[PAIMON_OPTION_PREFIX + kv.first] = kv.second;

    }

    // Prefer hadoop conf from scan node level (range_params->properties) over split level

    // to avoid redundant configuration in each split

    if (range_params->__isset.properties && !range_params->properties.empty()) {

        for (const auto& kv : range_params->properties) {

            params[HADOOP_OPTION_PREFIX + kv.first] = kv.second;

        }

    } else if (paimon_params.__isset.hadoop_conf) {

        // Fallback to split level hadoop conf for backward compatibility

        for (const auto& kv : paimon_params.hadoop_conf) {

            params[HADOOP_OPTION_PREFIX + kv.first] = kv.second;

        }

    }

    int64_t self_split_weight = range.__isset.self_split_weight ? range.self_split_weight : -1;

    _jni_connector = std::make_unique<JniConnector>("org/apache/doris/paimon/PaimonJniScanner",

                                                    params, column_names, self_split_weight);

}

Status PaimonJniReader::get_next_block(Block* block, size_t* read_rows, bool* eof) {

    if (_push_down_agg_type == TPushAggOp::type::COUNT && _remaining_table_level_row_count >= 0) {

        auto rows = std::min(_remaining_table_level_row_count,

                             (int64_t)_state->query_options().batch_size);

        _remaining_table_level_row_count -= rows;

        auto mutate_columns = block->mutate_columns();

        for (auto& col : mutate_columns) {

            col->resize(rows);

        }

        block->set_columns(std::move(mutate_columns));

        *read_rows = rows;

        if (_remaining_table_level_row_count == 0) {

            *eof = true;

        }

        return Status::OK();

    }

    return _jni_connector->get_next_block(block, read_rows, eof);

}

Status PaimonJniReader::init_reader() {

    RETURN_IF_ERROR(_jni_connector->init());

    return _jni_connector->open(_state, _profile);

}

#include "common/compile_check_end.h"

} // namespace doris