// 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/hudi_reader.h"

#include <vector>

#include "common/status.h"

namespace doris {

// ============================================================================

// HudiParquetReader: on_before_init_reader

// ============================================================================

Status HudiParquetReader::on_before_init_reader(ReaderInitContext* ctx) {

    _column_descs = ctx->column_descs;

    _fill_col_name_to_block_idx = ctx->col_name_to_block_idx;

    RETURN_IF_ERROR(_extract_partition_values(*ctx->range, ctx->tuple_descriptor,

                                              _fill_partition_values,

                                              &_fill_partition_value_is_null));

    // Get parquet file metadata schema (file already opened by init_reader)

    const FieldDescriptor* field_desc = nullptr;

    RETURN_IF_ERROR(get_file_metadata_schema(&field_desc));

    DCHECK(field_desc != nullptr);

    // Build table_info_node using field_id matching (shared with Paimon/Iceberg)

    RETURN_IF_ERROR(gen_table_info_node_by_field_id(

            get_scan_params(), get_scan_range().table_format_params.hudi_params.schema_id,

            get_tuple_descriptor(), *field_desc));

    ctx->table_info_node = table_info_node_ptr;

    // Extract column names from descriptors

    for (const auto& desc : *ctx->column_descs) {

        if (desc.category == ColumnCategory::REGULAR ||

            desc.category == ColumnCategory::GENERATED) {

            ctx->column_names.push_back(desc.name);

        }

    }

    return Status::OK();

}

// ============================================================================

// HudiOrcReader: on_before_init_reader

// ============================================================================

Status HudiOrcReader::on_before_init_reader(ReaderInitContext* ctx) {

    _column_descs = ctx->column_descs;

    _fill_col_name_to_block_idx = ctx->col_name_to_block_idx;

    RETURN_IF_ERROR(_extract_partition_values(*ctx->range, ctx->tuple_descriptor,

                                              _fill_partition_values,

                                              &_fill_partition_value_is_null));

    // Get ORC file type (file already opened by init_reader)

    const orc::Type* orc_type_ptr = nullptr;

    RETURN_IF_ERROR(get_file_type(&orc_type_ptr));

    // Build table_info_node using field_id matching

    RETURN_IF_ERROR(gen_table_info_node_by_field_id(

            get_scan_params(), get_scan_range().table_format_params.hudi_params.schema_id,

            get_tuple_descriptor(), orc_type_ptr));

    ctx->table_info_node = table_info_node_ptr;

    // Extract column names from descriptors

    for (const auto& desc : *ctx->column_descs) {

        if (desc.category == ColumnCategory::REGULAR ||

            desc.category == ColumnCategory::GENERATED) {

            ctx->column_names.push_back(desc.name);

        }

    }

    return Status::OK();

}

} // namespace doris