//Released under the MIT License.

//

//Copyright (c) 2018 Ntreev Soft co., Ltd.

//

//Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated

//documentation files (the "Software"), to deal in the Software without restriction, including without limitation the

//rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit

//persons to whom the Software is furnished to do so, subject to the following conditions:

//

//The above copyright notice and this permission notice shall be included in all copies or substantial portions of the

//Software.

//

//THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE

//WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR

//COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR

//OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Text;

namespace Ntreev.Library

{

public class ConsoleProgress : Progress

{

private readonly TextWriter writer;

public ConsoleProgress()

: this(Console.Out)

{

}

public ConsoleProgress(TextWriter writer)

{

this.writer = writer;

this.Style = ConsoleProgressStyle.Percent;

}

public static string GetProgressString(int index, int count)

{

var len = $"{count}".Length;

var f = string.Format("{{0,{0}}}", len);

return string.Format(f, index) + "/" + string.Format(f, count);

}

public ConsoleProgressStyle Style

{

get; set;

}

protected override void OnChanged(ProgressChangedEventArgs e)

{

base.OnChanged(e);

var progressString = this.GetPrgressStringInternal(e.Value) ?? string.Empty;

if (progressString != string.Empty)

progressString += " ";

var message = $"{progressString}{e.Message}";

if (message != string.Empty)

this.writer.WriteLine(message);

}

protected virtual string GetCustomPrgressString(double value)

{

return this.GetPercentString(value);

}

protected string GetPercentString(double value)

{

return $"[{(value * 100),3}%]";

}

protected string GetProgressString(double value, int length)

{

var ss = length * value;

var fill = string.Empty.PadRight((int)ss, '#');

var empty = string.Empty.PadRight(length - fill.Length, '.');

return $"[{fill}{empty}]";

}

private string GetPrgressStringInternal(double value)

{

if (this.Style == ConsoleProgressStyle.None)

{

return string.Empty;

}

else if (this.Style == ConsoleProgressStyle.Percent)

{

return this.GetPercentString(value);

}

else if (this.Style == ConsoleProgressStyle.Progress)

{

return this.GetProgressString(value, 10);

}

else

{

return this.GetCustomPrgressString(value);

}

}

}

}