using DotnetStandardStreams;
using Console = System.Console;

namespace DotnetStandardStreamsApp;

/// <summary>
/// Typical command line for testing in PowerShell:
/// @(1,2,3,4,5,6,7,8,9,10) | .\DotnetStandardStreamsApp.exe .\input.txt
/// </summary>
public static class Program
{
	public static void Main(string[] args)
	{
		ITextSource textSource;
		IOutputTarget textTarget = new ConsoleOutputTarget();

		if (args.Length > 0)
			textSource = new FileTextSource(args[0]);
		else
			textSource = new StdInTextSource();

		Console.WriteLine("---- ExecuteAll");
		ExecuteAll(
			textSource,
			textTarget);

		//Console.WriteLine("---- ExecuteAction");
		//ExecuteAction(
		//	textSource,
		//	textTarget);

		//Console.WriteLine("---- ExecuteWhileNotEof");
		//ExecuteWhileNotEof(
		//	textSource,
		//	textTarget);

		//Console.WriteLine("---- ExecuteForNotEof");
		//ExecuteForNotEof(
		//	textSource,
		//	textTarget);
	}

	private static void ExecuteWhileNotEof(ITextSource source, IOutputTarget target)
	{
		source.Open();
		target.Open();

		while (!source.Eof())
		{
			string thisLine = source.Read();
			target.Output(thisLine);
		}

		target.Close();
		source.Close();
	}

	private static void ExecuteForNotEof(ITextSource source, IOutputTarget target)
	{
		source.Open();
		target.Open();

		for (string line = source.Read(); !source.Eof(); line = source.Read())
			target.Output(line);

		target.Close();
		source.Close();
	}

	private static void ExecuteAction(ITextSource source, IOutputTarget target)
	{
		source.Open();
		target.Open();

		source.ReadAll(target.Output);

		target.Close();
		source.Close();
	}

	private static void ExecuteAll(ITextSource source, IOutputTarget target)
	{
		source.Open();
		target.Open();

		foreach (string line in source.ReadAll())
			target.Output(line);

		target.Close();
		source.Close();
	}
}