// 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 <gen_cpp/PlanNodes_types.h>

#include <memory>

#include <string>

#include <utility>

#include <vector>

#include "common/status.h"

#include "format/orc/vorc_reader.h"

#include "format/parquet/vparquet_reader.h"

#include "format/table/deletion_vector.h"

#include "format/table/table_schema_change_helper.h"

namespace doris {

class ShardedKVCache;

std::string build_paimon_deletion_vector_cache_key(const TPaimonDeletionFileDesc& deletion_file);

Status decode_paimon_deletion_vector_buffer(const char* buf, size_t buffer_size,

                                            DeletionVector* deletion_vector);

// PaimonOrcReader: directly inherits OrcReader (no composition wrapping).

// Schema mapping in on_before_init_reader, deletion vector reading in on_after_init_reader.

class PaimonOrcReader final : public OrcReader, public TableSchemaChangeHelper {

public:

    ENABLE_FACTORY_CREATOR(PaimonOrcReader);

    PaimonOrcReader(RuntimeProfile* profile, RuntimeState* state,

                    const TFileScanRangeParams& params, const TFileRangeDesc& range,

                    size_t batch_size, const std::string& ctz, ShardedKVCache* kv_cache,

                    io::IOContext* io_ctx, FileMetaCache* meta_cache = nullptr,

                    bool enable_lazy_mat = true)

            : OrcReader(profile, state, params, range, batch_size, ctz, io_ctx, meta_cache,

                        enable_lazy_mat),

              _kv_cache(kv_cache) {

        _init_paimon_profile();

    }

    PaimonOrcReader(RuntimeProfile* profile, RuntimeState* state,

                    const TFileScanRangeParams& params, const TFileRangeDesc& range,

                    size_t batch_size, const std::string& ctz, ShardedKVCache* kv_cache,

                    std::shared_ptr<io::IOContext> io_ctx_holder,

                    FileMetaCache* meta_cache = nullptr, bool enable_lazy_mat = true)

            : OrcReader(profile, state, params, range, batch_size, ctz, std::move(io_ctx_holder),

                        meta_cache, enable_lazy_mat),

              _kv_cache(kv_cache) {

        _init_paimon_profile();

    }

    ~PaimonOrcReader() final = default;

    Status TEST_init_deletion_vector() { return _init_deletion_vector(); }

protected:

    Status on_before_init_reader(ReaderInitContext* ctx) override;

    Status on_after_init_reader(ReaderInitContext* /*ctx*/) override;

private:

    void _init_paimon_profile();

    Status _init_deletion_vector();

    struct PaimonProfile {

        RuntimeProfile::Counter* num_delete_rows = nullptr;

        RuntimeProfile::Counter* delete_files_read_time = nullptr;

        RuntimeProfile::Counter* parse_deletion_vector_time = nullptr;

        RuntimeProfile::Counter* decoded_cache_hit_count = nullptr;

        RuntimeProfile::Counter* decoded_cache_miss_count = nullptr;

        RuntimeProfile::Counter* file_cache_hit_count = nullptr;

        RuntimeProfile::Counter* file_cache_miss_count = nullptr;

        RuntimeProfile::Counter* file_cache_peer_read_count = nullptr;

    };

    const DeletionVector* _deletion_vector = nullptr;

    ShardedKVCache* _kv_cache;

    PaimonProfile _paimon_profile;

};

// PaimonParquetReader: directly inherits ParquetReader (no composition wrapping).

class PaimonParquetReader final : public ParquetReader, public TableSchemaChangeHelper {

public:

    ENABLE_FACTORY_CREATOR(PaimonParquetReader);

    PaimonParquetReader(RuntimeProfile* profile, const TFileScanRangeParams& params,

                        const TFileRangeDesc& range, size_t batch_size, const cctz::time_zone* ctz,

                        ShardedKVCache* kv_cache, io::IOContext* io_ctx, RuntimeState* state,

                        FileMetaCache* meta_cache = nullptr, bool enable_lazy_mat = true)

            : ParquetReader(profile, params, range, batch_size, ctz, io_ctx, state, meta_cache,

                            enable_lazy_mat),

              _kv_cache(kv_cache) {

        _init_paimon_profile();

    }

    PaimonParquetReader(RuntimeProfile* profile, const TFileScanRangeParams& params,

                        const TFileRangeDesc& range, size_t batch_size, const cctz::time_zone* ctz,

                        ShardedKVCache* kv_cache, std::shared_ptr<io::IOContext> io_ctx_holder,

                        RuntimeState* state, FileMetaCache* meta_cache = nullptr,

                        bool enable_lazy_mat = true)

            : ParquetReader(profile, params, range, batch_size, ctz, std::move(io_ctx_holder),

                            state, meta_cache, enable_lazy_mat),

              _kv_cache(kv_cache) {

        _init_paimon_profile();

    }

    ~PaimonParquetReader() final = default;

    Status TEST_init_deletion_vector() { return _init_deletion_vector(); }

protected:

    Status on_before_init_reader(ReaderInitContext* ctx) override;

    Status on_after_init_reader(ReaderInitContext* /*ctx*/) override;

private:

    void _init_paimon_profile();

    Status _init_deletion_vector();

    struct PaimonProfile {

        RuntimeProfile::Counter* num_delete_rows = nullptr;

        RuntimeProfile::Counter* delete_files_read_time = nullptr;

        RuntimeProfile::Counter* parse_deletion_vector_time = nullptr;

        RuntimeProfile::Counter* decoded_cache_hit_count = nullptr;

        RuntimeProfile::Counter* decoded_cache_miss_count = nullptr;

        RuntimeProfile::Counter* file_cache_hit_count = nullptr;

        RuntimeProfile::Counter* file_cache_miss_count = nullptr;

        RuntimeProfile::Counter* file_cache_peer_read_count = nullptr;

    };

    const DeletionVector* _deletion_vector = nullptr;

    ShardedKVCache* _kv_cache;

    PaimonProfile _paimon_profile;

};

} // namespace doris