// 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 "exprs/vbloom_predicate.h"

#include <cstddef>

#include <utility>

#include "common/status.h"

#include "core/block/block.h"

#include "core/block/column_numbers.h"

#include "core/block/column_with_type_and_name.h"

#include "core/column/column.h"

#include "core/column/column_nullable.h"

#include "core/column/column_vector.h"

#include "core/data_type/data_type.h"

#include "core/data_type/data_type_nullable.h"

#include "core/types.h"

#include "exprs/bloom_filter_func.h"

#include "runtime/runtime_state.h"

namespace doris {

class RowDescriptor;

class TExprNode;

} // namespace doris

namespace doris {

class VExprContext;

VBloomPredicate::VBloomPredicate(const TExprNode& node) : VExpr(node), _filter(nullptr) {}

Status VBloomPredicate::prepare(RuntimeState* state, const RowDescriptor& desc,

                                VExprContext* context) {

    RETURN_IF_ERROR_OR_PREPARED(VExpr::prepare(state, desc, context));

    if (_children.size() != 1) {

        return Status::InternalError("Invalid argument for VBloomPredicate.");

    }

    _prepare_finished = true;

    return Status::OK();

}

Status VBloomPredicate::open(RuntimeState* state, VExprContext* context,

                             FunctionContext::FunctionStateScope scope) {

    DCHECK(_prepare_finished);

    RETURN_IF_ERROR(VExpr::open(state, context, scope));

    _open_finished = true;

    return Status::OK();

}

void VBloomPredicate::close(VExprContext* context, FunctionContext::FunctionStateScope scope) {

    VExpr::close(context, scope);

}

Status VBloomPredicate::_do_execute(VExprContext* context, const Block* block,

                                    const uint8_t* __restrict filter, Selector* selector,

                                    size_t count, ColumnPtr& result_column) const {

    DCHECK(_open_finished || block == nullptr);

    DCHECK(!(filter != nullptr && selector != nullptr))

            << "filter and selector can not be both set";

    DCHECK_EQ(_children.size(), 1);

    ColumnPtr argument_column;

    RETURN_IF_ERROR(_children[0]->execute_column(context, block, selector, count, argument_column));

    argument_column = argument_column->convert_to_full_column_if_const();

    size_t sz = argument_column->size();

    auto res_data_column = ColumnUInt8::create(sz);

    res_data_column->resize(sz);

    auto* ptr = ((ColumnUInt8*)res_data_column.get())->get_data().data();

    _filter->find_fixed_len(argument_column, ptr, filter);

    result_column = std::move(res_data_column);

    DCHECK_EQ(result_column->size(), count);

    return Status::OK();

}

Status VBloomPredicate::execute_column(VExprContext* context, const Block* block,

                                       Selector* selector, size_t count,

                                       ColumnPtr& result_column) const {

    return _do_execute(context, block, nullptr, selector, count, result_column);

}

Status VBloomPredicate::execute_runtime_filter(VExprContext* context, const Block* block,

                                               const uint8_t* __restrict filter, size_t count,

                                               ColumnPtr& result_column,

                                               ColumnPtr* arg_column) const {

    return _do_execute(context, block, filter, nullptr, count, result_column);

}

const std::string& VBloomPredicate::expr_name() const {

    return EXPR_NAME;

}

void VBloomPredicate::set_filter(std::shared_ptr<BloomFilterFuncBase> filter) {

    _filter = filter;

}

uint64_t VBloomPredicate::get_digest(uint64_t seed) const {

    seed = _children[0]->get_digest(seed);

    if (seed) {

        char* data;

        int len;

        _filter->get_data(&data, &len);

        return HashUtil::hash64(data, len, seed);

    }

    return 0;

}

} // namespace doris