// 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/vin_predicate.h"

#include <fmt/format.h>

#include <gen_cpp/Exprs_types.h>

#include <glog/logging.h>

#include <algorithm>

#include <cstddef>

#include <ostream>

#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/block/columns_with_type_and_name.h"

#include "exprs/expr_zonemap_filter.h"

#include "exprs/function/in.h"

#include "exprs/function/simple_function_factory.h"

#include "exprs/vexpr_context.h"

#include "exprs/vslot_ref.h"

#include "runtime/runtime_state.h"

namespace doris {

class RowDescriptor;

class RuntimeState;

} // namespace doris

namespace doris {

VInPredicate::VInPredicate(const TExprNode& node)

        : VExpr(node), _is_not_in(node.in_predicate.is_not_in) {}

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

                             VExprContext* context) {

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

    if (_children.empty()) {

        return Status::InternalError("no Function operator in.");

    }

    _expr_name =

            fmt::format("({} {} set)", _children[0]->expr_name(), _is_not_in ? "not_in" : "in");

    ColumnsWithTypeAndName argument_template;

    argument_template.reserve(get_num_children());

    for (auto child : _children) {

        argument_template.emplace_back(nullptr, child->data_type(), child->expr_name());

    }

    // construct the proper function_name

    std::string head(_is_not_in ? "not_" : "");

    std::string real_function_name = head + std::string(function_name);

    auto arg_type = remove_nullable(argument_template[0].type);

    if (is_complex_type(arg_type->get_primitive_type())) {

        real_function_name = "collection_" + real_function_name;

    }

    _function = SimpleFunctionFactory::instance().get_function(real_function_name,

                                                               argument_template, _data_type, {});

    if (_function == nullptr) {

        return Status::NotSupported("Function {} is not implemented", real_function_name);

    }

    VExpr::register_function_context(state, context);

    _prepare_finished = true;

    if (state->query_options().__isset.in_list_value_count_threshold) {

        _in_list_value_count_threshold = state->query_options().in_list_value_count_threshold;

    }

    return Status::OK();

}

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

                          FunctionContext::FunctionStateScope scope) {

    DCHECK(_prepare_finished);

    for (auto& child : _children) {

        RETURN_IF_ERROR(child->open(state, context, scope));

    }

    RETURN_IF_ERROR(VExpr::init_function_context(state, context, scope, _function));

    if (scope == FunctionContext::FRAGMENT_LOCAL) {

        RETURN_IF_ERROR(VExpr::get_const_col(context, nullptr));

    }

    _is_args_all_constant = std::all_of(_children.begin() + 1, _children.end(),

                                        [](const VExprSPtr& expr) { return expr->is_constant(); });

    if (scope == FunctionContext::FRAGMENT_LOCAL && _is_args_all_constant) {

        RETURN_IF_ERROR(_materialize_for_zonemap_filter(context));

    }

    _open_finished = true;

    return Status::OK();

}

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

    VExpr::close_function_context(context, scope, _function);

    VExpr::close(context, scope);

}

Status VInPredicate::evaluate_inverted_index(VExprContext* context, uint32_t segment_num_rows) {

    DCHECK_GE(get_num_children(), 2);

    return _evaluate_inverted_index(context, _function, segment_num_rows);

}

Status VInPredicate::_materialize_for_zonemap_filter(VExprContext* context) {

    _seg_filter_values.clear();

    _seg_filter_contains_null = false;

    _zonemap_materialized = false;

    if (_children.size() < 2 || !_children[0]->is_slot_ref()) {

        return Status::OK();

    }

    const auto data_type = remove_nullable(_children[0]->data_type());

    DORIS_CHECK(data_type != nullptr);

    if (is_complex_type(data_type->get_primitive_type())) {

        return Status::OK();

    }

    DORIS_CHECK(context != nullptr);

    auto* fn_ctx = context->fn_context(_fn_context_index);

    DORIS_CHECK(fn_ctx != nullptr);

    auto* in_state =

            reinterpret_cast<InState*>(fn_ctx->get_function_state(FunctionContext::FRAGMENT_LOCAL));

    DORIS_CHECK(in_state != nullptr);

    DORIS_CHECK(in_state->use_set);

    DORIS_CHECK(in_state->hybrid_set != nullptr);

    expr_zonemap::InZonemapMaterializedSet materialized;

    RETURN_IF_ERROR(expr_zonemap::materialize_hybrid_set_for_zonemap_filter(

            *in_state->hybrid_set, data_type, &materialized));

    _seg_filter_contains_null = materialized.contains_null;

    _seg_filter_values = std::move(materialized.values);

    _seg_filter_min = std::move(materialized.min_value);

    _seg_filter_max = std::move(materialized.max_value);

    _zonemap_materialized = true;

    return Status::OK();

}

ZoneMapFilterResult VInPredicate::evaluate_zonemap_filter(const ZoneMapEvalContext& ctx) const {

    if (_is_not_in && _seg_filter_contains_null) {

        return ZoneMapFilterResult::kNoMatch;

    }

    return expr_zonemap::eval_in_zonemap(ctx, get_child(0), _is_not_in, _seg_filter_values,

                                         _seg_filter_min, _seg_filter_max);

}

bool VInPredicate::can_evaluate_zonemap_filter() const {

    return _zonemap_materialized && std::dynamic_pointer_cast<VSlotRef>(get_child(0)) != nullptr;

}

Status VInPredicate::execute_column_impl(VExprContext* context, const Block* block,

                                         const Selector* selector, size_t count,

                                         ColumnPtr& result_column) const {

    if (is_const_and_have_executed()) { // const have execute in open function

        result_column = get_result_from_const(count);

        return Status::OK();

    }

    if (fast_execute(context, selector, count, result_column)) {

        return Status::OK();

    }

    DCHECK(_open_finished || block == nullptr);

    // This is an optimization. For expressions like colA IN (1, 2, 3, 4),

    // where all values inside the IN clause are constants,

    // a hash set is created during open, and it will not be accessed again during execute

    //  Here, _children[0] is colA

    const size_t args_size = _is_args_all_constant ? 1 : _children.size();

    ColumnNumbers arguments;

    arguments.reserve(args_size);

    Block temp_block;

    for (int i = 0; i < args_size; ++i) {

        ColumnPtr column;

        RETURN_IF_ERROR(_children[i]->execute_column(context, block, selector, count, column));

        arguments.push_back(i);

        temp_block.insert({column, _children[i]->execute_type(block), _children[i]->expr_name()});

    }

    int num_columns_without_result = temp_block.columns();

    temp_block.insert({nullptr, _data_type, _expr_name});

    RETURN_IF_ERROR(_function->execute(context->fn_context(_fn_context_index), temp_block,

                                       arguments, num_columns_without_result, temp_block.rows()));

    result_column = temp_block.get_by_position(num_columns_without_result).column;

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

    return Status::OK();

}

size_t VInPredicate::estimate_memory(const size_t rows) {

    if (is_const_and_have_executed()) {

        return 0;

    }

    size_t estimate_size = 0;

    for (int i = 0; i < _children.size(); ++i) {

        estimate_size += _children[i]->estimate_memory(rows);

    }

    if (_data_type->is_nullable()) {

        estimate_size += rows * sizeof(uint8_t);

    }

    estimate_size += rows * sizeof(uint8_t);

    return estimate_size;

}

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

    return _expr_name;

}

std::string VInPredicate::debug_string() const {

    std::stringstream out;

    out << "InPredicate(" << children()[0]->debug_string() << " " << _is_not_in << ",[";

    int num_children = get_num_children();

    for (int i = 1; i < num_children; ++i) {

        out << (i == 1 ? "" : " ") << children()[i]->debug_string();

    }

    out << "])";

    return out.str();

}

} // namespace doris