import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

/**
 * The DisplayDocuments class is responsible for displaying tests and surveys
 * to the console screen for selecting and viewing.
 * @author Tom Rottinger
 *
 */
public class DisplayDocuments {

	/**
	 * displaySurveys does exactly what its name entails - it provides the
	 * user with a list of surveys that are able to be displayed and, upon
	 * user selection, displays the survey.
	 * @throws IOException - in case of any bad input.
	 */
	public static void displaySurveys() throws IOException
	{
		/** The selected survey, displayed at the end of the method. */
		Survey selectedSurvey;

		/** The reader used to get user input on which survey to display. */
		BufferedReader displayReader;

		/** The number indicating which survey the user selected. */
		int userSurveyChoice;

		/** User input, parsed into a number for selecting a survey. */
		String displayReaderEntry;

		displayReader = new BufferedReader(new InputStreamReader(System.in));

		System.out.println("Which survey would you like to display?");

		/** Display all surveys in memory. */
		for (int i = 1; i <= SurveyTestSystem.surveyList.size(); i++)
		{
			System.out.println(i + ".) " + SurveyTestSystem.surveyList.get(i-1).documentName);
		}

		/** Until a valid input is chosen, always wait for a valid input... */
		while (true)
		{
			displayReaderEntry = displayReader.readLine();

			try
			{
				userSurveyChoice = Integer.parseInt(displayReaderEntry);
				if (userSurveyChoice < 1 || userSurveyChoice > SurveyTestSystem.surveyList.size())
				{
					System.out.println("Please select a number from the list above.");
				}
				else break;
			}
			catch (Exception e)
			{
			}
		}

		/** Finally, display the selected survey. */
		selectedSurvey = SurveyTestSystem.surveyList.get(userSurveyChoice - 1);
		selectedSurvey.display();
	}

	public static void displayTests()
	{
		System.out.println("Feature coming soon!");
	}

}