// Copyright 2023 PingCAP, Inc.
//
// Licensed 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 <Core/Block.h>
#include <DataStreams/IBlockOutputStream.h>


namespace DB
{

class WriteBuffer;
class Context;


/** Prints the result in the form of beautiful tables.
  */
class PrettyBlockOutputStream : public IBlockOutputStream
{
public:
    /// no_escapes - do not use ANSI escape sequences - to display in the browser, not in the console.
    PrettyBlockOutputStream(
        WriteBuffer & ostr_,
        const Block & header_,
        bool no_escapes_,
        size_t max_rows_,
        const Context & context_);

    Block getHeader() const override { return header; }
    void write(const Block & block) override;
    void writeSuffix() override;

    void flush() override;

    void setExtremes(const Block & extremes_) override { extremes = extremes_; }

protected:
    void writeExtremes();

    WriteBuffer & ostr;
    const Block header;
    size_t max_rows;
    size_t total_rows = 0;
    size_t terminal_width = 0;

    bool no_escapes;

    Block extremes;

    const Context & context;

    using Widths = PODArray<size_t>;
    using WidthsPerColumn = std::vector<Widths>;

    static void calculateWidths(
        const Block & block,
        WidthsPerColumn & widths,
        Widths & max_widths,
        Widths & name_widths);
    void writeValueWithPadding(
        const ColumnWithTypeAndName & elem,
        size_t row_num,
        size_t value_width,
        size_t pad_to_width);
};

} // namespace DB