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package org.jlot.client.configuration;

import java.io.IOException;

import javax.inject.Inject;

import jline.console.ConsoleReader;

import org.springframework.context.support.MessageSourceAccessor;

public class UserConsole implements Console
{
	@Inject
	private ConsoleReader			consoleReader;

	@Inject
	private MessageSourceAccessor	messageSourceAccessor;

	@Override
	public String readLine ( String promptCode, String... args )
	{
		try
		{
			return consoleReader.readLine(getLabel(promptCode, args));
		}
		catch (IOException e)
		{
			throw new IllegalStateException(e);
		}
	}

	@Override
	public String readPassword ( String promptCode, String... args )
	{
		try
		{
			return consoleReader.readLine(getLabel(promptCode, args), new Character('*'));
		}
		catch (IOException e)
		{
			throw new IllegalStateException(e);
		}
	}

	@Override
	public void prompt ( String promptCode, String... args )
	{
		try
		{
			consoleReader.println(getPrompt(promptCode, args));
			consoleReader.flush();
		}
		catch (IOException e)
		{
			throw new IllegalStateException(e);
		}
	}

	private String getLabel ( String promptCode, String[] args )
	{
		return getPrompt(promptCode, args) + ": ";
	}

	private String getPrompt ( String promptCode, Object[] args )
	{
		String prompt = messageSourceAccessor.getMessage(promptCode, args, "");
		if (prompt.equals(""))
		{
			prompt = String.format(promptCode, args);
		}
		return prompt;
	}

	@Override
	public void newline ( )
	{
		try
		{
			consoleReader.println();
			consoleReader.flush();
		}
		catch (IOException e)
		{
			throw new IllegalStateException(e);
		}
	}

	@Override
	public void sure ( String promptCode, String... args )
	{
		if (yesOrNo(promptCode, args) == false)
		{
			prompt("Execution canceled");
			System.exit(1);
		}
	}

	@Override
	public boolean yesOrNo ( String promptCode, String... args )
	{
		try
		{
			consoleReader.println();
			String prompt = getPrompt(promptCode, args) + " [y/n]: ";
			String answer = consoleReader.readLine(prompt);
			return "y".equals(answer);
		}
		catch (IOException e)
		{
			throw new IllegalStateException(e);
		}
	}
}