// 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.

#pragma once

#include <cstddef>

#include <cstdint>

#include <string>

#include <unordered_map>

#include <unordered_set>

#include <utility>

#include <vector>

#include "common/status.h"

#include "core/column/column_dictionary.h"

#include "core/data_type/define_primitive_type.h"

#include "core/data_type/primitive_type.h"

#include "core/types.h"

#include "format/orc/vorc_reader.h"

#include "format/parquet/vparquet_reader.h"

#include "format/table/iceberg_reader_mixin.h"

#include "storage/olap_common.h"

namespace tparquet {

class KeyValue;

class ColumnMetaData;

} // namespace tparquet

namespace doris {

class RowDescriptor;

class RuntimeState;

class SlotDescriptor;

class TFileRangeDesc;

class TFileScanRangeParams;

class TIcebergDeleteFileDesc;

class TupleDescriptor;

namespace io {

struct IOContext;

} // namespace io

template <typename T>

class ColumnStr;

using ColumnString = ColumnStr<UInt32>;

class Block;

class GenericReader;

class ShardedKVCache;

class VExprContext;

struct IcebergTableReader {

    static bool _is_fully_dictionary_encoded(const tparquet::ColumnMetaData& column_metadata);

};

// IcebergParquetReader: inherits ParquetReader via IcebergReaderMixin CRTP

class IcebergParquetReader final : public IcebergReaderMixin<ParquetReader> {

public:

    ENABLE_FACTORY_CREATOR(IcebergParquetReader);

    IcebergParquetReader(ShardedKVCache* kv_cache, RuntimeProfile* profile,

                         const TFileScanRangeParams& params, const TFileRangeDesc& range,

                         size_t batch_size, const cctz::time_zone* ctz, io::IOContext* io_ctx,

                         RuntimeState* state, FileMetaCache* meta_cache)

            : IcebergReaderMixin<ParquetReader>(kv_cache, profile, params, range, batch_size, ctz,

                                                io_ctx, state, meta_cache) {}

    IcebergParquetReader(ShardedKVCache* kv_cache, RuntimeProfile* profile,

                         const TFileScanRangeParams& params, const TFileRangeDesc& range,

                         size_t batch_size, const cctz::time_zone* ctz,

                         std::shared_ptr<io::IOContext> io_ctx_holder, RuntimeState* state,

                         FileMetaCache* meta_cache)

            : IcebergReaderMixin<ParquetReader>(kv_cache, profile, params, range, batch_size, ctz,

                                                std::move(io_ctx_holder), state, meta_cache) {}

    void set_delete_rows() final {

        // Call ParquetReader's set_delete_rows(const vector<int64_t>*)

        ParquetReader::set_delete_rows(_iceberg_delete_rows);

    }

    void set_deletion_vector() final {

        ParquetReader::set_deletion_vector(_iceberg_deletion_vector);

    }

protected:

    // Parquet-specific schema matching via on_before_init_reader hook

    Status on_before_init_reader(ReaderInitContext* ctx) override;

    std::unique_ptr<GenericReader> _create_equality_reader(

            const TFileRangeDesc& delete_desc) final {

        return ParquetReader::create_unique(this->get_profile(), this->get_scan_params(),

                                            delete_desc, READ_DELETE_FILE_BATCH_SIZE,

                                            &this->get_state()->timezone_obj(), this->get_io_ctx(),

                                            this->get_state(), this->_meta_cache);

    }

    static ColumnIdResult _create_column_ids(const FieldDescriptor* field_desc,

                                             const TupleDescriptor* tuple_descriptor);

private:

    Status _read_position_delete_file(const TFileRangeDesc* delete_range,

                                      DeleteFile* position_delete) final;

};

// IcebergOrcReader: inherits OrcReader via IcebergReaderMixin CRTP

class IcebergOrcReader final : public IcebergReaderMixin<OrcReader> {

public:

    ENABLE_FACTORY_CREATOR(IcebergOrcReader);

    IcebergOrcReader(ShardedKVCache* kv_cache, RuntimeProfile* profile, RuntimeState* state,

                     const TFileScanRangeParams& params, const TFileRangeDesc& range,

                     size_t batch_size, const std::string& ctz, io::IOContext* io_ctx,

                     FileMetaCache* meta_cache)

            : IcebergReaderMixin<OrcReader>(kv_cache, profile, state, params, range, batch_size,

                                            ctz, io_ctx, meta_cache) {}

    IcebergOrcReader(ShardedKVCache* kv_cache, RuntimeProfile* profile, RuntimeState* state,

                     const TFileScanRangeParams& params, const TFileRangeDesc& range,

                     size_t batch_size, const std::string& ctz,

                     std::shared_ptr<io::IOContext> io_ctx_holder, FileMetaCache* meta_cache)

            : IcebergReaderMixin<OrcReader>(kv_cache, profile, state, params, range, batch_size,

                                            ctz, std::move(io_ctx_holder), meta_cache) {}

    void set_delete_rows() final {

        // Call OrcReader's set_position_delete_rowids

        this->set_position_delete_rowids(_iceberg_delete_rows);

    }

    void set_deletion_vector() final { OrcReader::set_deletion_vector(_iceberg_deletion_vector); }

protected:

    // ORC-specific schema matching via on_before_init_reader hook

    Status on_before_init_reader(ReaderInitContext* ctx) override;

    std::unique_ptr<GenericReader> _create_equality_reader(

            const TFileRangeDesc& delete_desc) override {

        return OrcReader::create_unique(this->get_profile(), this->get_state(),

                                        this->get_scan_params(), delete_desc,

                                        READ_DELETE_FILE_BATCH_SIZE, this->get_state()->timezone(),

                                        this->get_io_ctx(), this->_meta_cache);

    }

    static ColumnIdResult _create_column_ids(const orc::Type* orc_type,

                                             const TupleDescriptor* tuple_descriptor);

    static const std::string ICEBERG_ORC_ATTRIBUTE;

private:

    Status _read_position_delete_file(const TFileRangeDesc* delete_range,

                                      DeleteFile* position_delete) final;

};

} // namespace doris