// 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 <functional>

#include <string>

#include "common/object_pool.h"

#include "common/status.h"

#include "core/block/column_with_type_and_name.h"

#include "exprs/function_context.h"

#include "exprs/vexpr.h"

namespace doris {

class RowDescriptor;

class RuntimeState;

class TExprNode;

class Block;

class VExprContext;

struct CastOptions;

} // namespace doris

namespace doris::format {

class Cast : public VExpr {

    ENABLE_FACTORY_CREATOR(Cast);

public:

    Cast(const DataTypePtr& type) {

        _node_type = TExprNodeType::CAST_EXPR;

        _opcode = TExprOpcode::CAST;

        _data_type = type;

    }

    ~Cast() override = default;

    Status prepare(RuntimeState* state, const RowDescriptor& desc, VExprContext* context) override;

    Status open(RuntimeState* state, VExprContext* context,

                FunctionContext::FunctionStateScope scope) override;

    void close(VExprContext* context, FunctionContext::FunctionStateScope scope) override;

    Status execute_column_impl(VExprContext* context, const Block* block, const Selector* selector,

                               size_t count, ColumnPtr& result_column) const override;

    std::string debug_string() const override;

    uint64_t get_digest(uint64_t seed) const override { return 0; }

    const std::string& expr_name() const override { return _expr_name; }

    // Ordinary CAST can fail for data-dependent input. Localization must retain the same

    // full-batch error behavior as VCastExpr instead of hiding errors in previously rejected rows.

    bool is_safe_to_execute_on_selected_rows() const override { return false; }

    Status clone_node(VExprSPtr* cloned_expr) const override {

        DORIS_CHECK(cloned_expr != nullptr);

        *cloned_expr = Cast::create_shared(_data_type);

        return Status::OK();

    }

protected:

    virtual void configure_cast_options(CastOptions& /*options*/) const {}

private:

    Status _do_execute(VExprContext* context, const Block* block, const Selector* selector,

                       size_t count, ColumnPtr& result_column) const;

    using CastExecutor =

            std::function<Status(RuntimeState*, const ColumnWithTypeAndName&,

                                 ColumnWithTypeAndName&, size_t, const NullMap::value_type*)>;

    std::string _expr_name;

    CastExecutor _cast_executor;

    RuntimeState* _runtime_state = nullptr;

};

inline bool is_cast_expr(const VExprSPtr& expr) {

    return dynamic_cast<const Cast*>(expr.get()) != nullptr;

}

} // namespace doris::format