import javax.swing.JOptionPane;
/**
 *
 * @author Christian Williams
 * CSC 120 Lab5
 * Fall 2015
 *
 */
public class Lab5 {

	public static void main(String[] args) {
		// Declare and initialize variables.
		final String OUTPUT_TITLE = "Lab5 by Christian Williams";
		int maxFoundSoFar = -1;
		int minFoundSoFar = 101;
		int validInputs = 0;
		int invalidInputs = 0;
		int sumOfTestScores = 0;
		int userInt = 0;
		double averageTestScore;
		String summary = "";
		// Do -- we loop until he enters a -1.
		do {
			// userString = get string from user with prompt about 0 to 100
			// and use of -1
			String userString = JOptionPane.showInputDialog(null, "Enter a test score between 0 to 100"
					+ " or enter -1 to exit" + "Test Grades", OUTPUT_TITLE, JOptionPane.NO_OPTION);
			// userInt = convert users String to int for computations
			userInt = Integer.parseInt(userString);
			// If userInt is not -1
			if (userInt != -1){
				// If userInt is out of legal range
				if (userInt < 0 || userInt > 100){
					// Increment the invalid-inputs counter.
					++invalidInputs;
					// Give user a bad-input message (we will ignore his input)
					JOptionPane.showMessageDialog(null, "Bad input. Enter the test score again.",
									OUTPUT_TITLE, JOptionPane.NO_OPTION);
				} // end inner if statement
			// Else it is good input so:
				 else {
					// Add userInt to our sum.
					sumOfTestScores += userInt;
					// Increment counter of valid-inputs
					++validInputs;
					// If userInt < minFoundSoFar
					if (userInt	< minFoundSoFar){
						// minFoundSoFar = userInt
						minFoundSoFar = userInt;
					} // end if statement
					// If userInt > maxFoundSoFar
					else if (userInt > maxFoundSoFar){
						// maxFoundSoFar = userInt
						maxFoundSoFar = userInt;
					}// end else if statement
					// Else do nothing
					else {
					}// end else statement
				}// end else statement
			}// end if statement
		} // end do statement
		// While userInt is not -1
		while (userInt != -1);
		// end do-while statement
		// If valid-inputs is greater than 0
		if (validInputs > 0){
			// Compute average [may need type casting to avoid int division!]
			averageTestScore = Math.round((double)sumOfTestScores / (double)validInputs);
			// Give a summary report
			summary += "Total test scores entered: " + validInputs + "\n";
			summary += "Average of all test scores: " + averageTestScore + "\n";
			summary += "Highest grade entered: " + maxFoundSoFar + "\n";
			summary += "Lowest grade entered: " + minFoundSoFar + "\n";
			summary += "Number of invalid entries: " + invalidInputs + "\n";
			JOptionPane.showMessageDialog(null, summary, OUTPUT_TITLE, JOptionPane.NO_OPTION);
		}// end if statement
		// Else
		else {
			// Tell user that no valid were entered hence no summary report.
			summary += "You did not enter any valid test scores.";
			JOptionPane.showMessageDialog(null, summary, OUTPUT_TITLE, JOptionPane.NO_OPTION);
		}// end else statement

		}// end main method

}// end lab5