// TextTester.java
// Use AS-IS to test CS 10 assignment 5, part 1, Fall 2008
// cmc, updated 11/18/08

import java.io.IOException;

public class TextTester {
    public static void main(String[] args) {
        
        if (args.length < 1 || args.length > 2)
            fatalMessage("usage: java TextTester [-u] source");

        String source = null;
        char sourceType = 'f'; // file by default
        
        for (String arg : args) {
            
            if (arg.charAt(0) == '-') {                  // an option
                String option = arg.substring(1, 2);
                if (option.equals("u"))
                    sourceType = 'u';
                else
                    fatalMessage("bad option: " + arg);
            }
            else {                                       // input source
                if (source == null)
                    source = arg;
                else
                    fatalMessage("extra input source: " + arg);
            }
        }

        // verify a source was entered
        if (source == null)
            fatalMessage("did not enter source of text");

        // try to get and print the text
        try {
            TextGetter getter;
            
            if (sourceType == 'f')
                getter = new FileText(source);
            else
                getter = new WebText(source);
                
            String text = getter.getText();
            System.out.print(text);
        }
        catch(IOException exception) {
            System.err.println("Input/output error - " + exception);
        }
    }

    // utility prints error message and exits
    private static void fatalMessage(String message) {
        System.err.println(message);
        System.exit(1);
    }
}