// 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/parquet/vparquet_page_index.h"

#include <gen_cpp/parquet_types.h>

#include <algorithm>

#include <limits>

#include <ostream>

#include <string>

#include "common/logging.h"

#include "common/status.h"

#include "format/parquet/parquet_common.h"

#include "format/parquet/parquet_predicate.h"

#include "util/thrift_util.h"

namespace cctz {

class time_zone;

} // namespace cctz

namespace doris {

struct FieldSchema;

} // namespace doris

namespace doris {

bool PageIndex::check_and_get_page_index_ranges(const std::vector<tparquet::ColumnChunk>& columns) {

    int64_t ci_start = std::numeric_limits<int64_t>::max();

    int64_t oi_start = std::numeric_limits<int64_t>::max();

    int64_t ci_end = -1;

    int64_t oi_end = -1;

    for (const tparquet::ColumnChunk& col_chunk : columns) {

        if (col_chunk.__isset.column_index_offset && col_chunk.__isset.column_index_length) {

            ci_start = std::min(ci_start, col_chunk.column_index_offset);

            ci_end =

                    std::max(ci_end, col_chunk.column_index_offset + col_chunk.column_index_length);

        }

        if (col_chunk.__isset.offset_index_offset && col_chunk.__isset.offset_index_length) {

            oi_start = std::min(oi_start, col_chunk.offset_index_offset);

            oi_end =

                    std::max(oi_end, col_chunk.offset_index_offset + col_chunk.offset_index_length);

        }

    }

    bool has_page_index = oi_end != -1 && ci_end != -1;

    if (has_page_index) {

        _column_index_start = ci_start;

        _column_index_size = ci_end - ci_start;

        _offset_index_start = oi_start;

        _offset_index_size = oi_end - oi_start;

    }

    return has_page_index;

}

Status PageIndex::parse_column_index(const tparquet::ColumnChunk& chunk, const uint8_t* buff,

                                     tparquet::ColumnIndex* column_index) const {

    int64_t buffer_offset = chunk.column_index_offset - _column_index_start;

    uint32_t length = chunk.column_index_length;

    DCHECK_GE(buffer_offset, 0);

    DCHECK_LE(buffer_offset + length, _column_index_size);

    RETURN_IF_ERROR(deserialize_thrift_msg(buff + buffer_offset, &length, true, column_index));

    return Status::OK();

}

Status PageIndex::parse_offset_index(const tparquet::ColumnChunk& chunk, const uint8_t* buff,

                                     tparquet::OffsetIndex* offset_index) const {

    int64_t buffer_offset = chunk.offset_index_offset - _offset_index_start;

    uint32_t length = chunk.offset_index_length;

    DCHECK_GE(buffer_offset, 0);

    DCHECK_LE(buffer_offset + length, _offset_index_size);

    RETURN_IF_ERROR(deserialize_thrift_msg(buff + buffer_offset, &length, true, offset_index));

    return Status::OK();

}

} // namespace doris