package mapGenerator;

import java.awt.geom.*;
import java.awt.Rectangle;
import java.util.ArrayList;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.File;
import java.io.FileReader;
import java.io.InputStreamReader;
import java.io.IOException;

/** Produces a buffered reader which reads a "map" from a file.
 * All methods at present are static.
 * The map is a sequence of lines representing segments and other information.
 * The segments are read from a file
 * Each line representing a segement contains the two endpoints of the segment, as follows:
 *     x1 y1 x2 y2
 * The map reader builds a list of the line segments
 * Comment lines start with //
 * "COUNTY" lines have county information
 */
public class MapReaderFactory {
    
    /** Create a buffered reader, given a file name
     * @param filePath
     * @throws IOException In case of any lower, unhandled exception
     * @return A buffered reader, open and ready to go.
     * No data has yet been taken from the stream.
     */
    public static BufferedReader createMapReader(String filePath) throws IOException {
        BufferedReader input;
        File inFile = new File(filePath);
        if (inFile == null || !inFile.exists()) {
            throw new FileNotFoundException("Map Reader can't open " + filePath);
        }
        try {
        input = new BufferedReader(new InputStreamReader (new FileInputStream(inFile)));
        } catch (Exception e) {
            throw new FileNotFoundException("Map reader can't get stream from "
                                + filePath + "\n" + e);
        }   
        return input;
    }  //end constructor
    
    /** This method builds an object that gets data from a
     *     / * randomly generated map
     * @return  */
    public static BufferedReader createMapReader() {
        return new BufferedReader(new RandomMapGeneratorReader());
        
    }
    /** This method builds an object that gets data from a
     *     / * randomly generated map of an indicated size (number of edges)
     * @param size Number of border segments in the first or only county
     * @return A buffered Reader, open and ready, but unread so far.
     */
    public static BufferedReader createMapReader(int size) {
        return new BufferedReader(new RandomMapGeneratorReader(size));       
    }
    
    /** This method builds an object that reads data from a
     *    randomly generated map of an indicated size (number of edges)
     *    and a random number of "counties".
     * @param size Number of border segments in the first or only county
     * @return A buffered Reader, open and ready, but unread so far.
     */
    public static BufferedReader createMapReader(int size, int howManyCounties) {
        return new BufferedReader(new RandomMapGeneratorReader(size, howManyCounties));
        
    }


} //end MapFileReader