package make;

import java.util.ArrayList;
import java.util.List;

/** Initial class for the 'make' program.
 *  @author
 */
public final class Main {

    /** Entry point for the CS61B make program.  ARGS may contain options
     *  and targets:
     *      [ -f MAKEFILE ] [ -D FILEINFO ] TARGET1 TARGET2 ...
     */
    public static void main(String... args) {
        String makefileName;
        String fileInfoName;

        if (args.length == 0) {
            usage();
        }

        makefileName = "Makefile";
        fileInfoName = "fileinfo";

        int a;
        for (a = 0; a < args.length; a += 1) {
            if (args[a].equals("-f")) {
                a += 1;
                if (a == args.length) {
                    usage();
                } else {
                    makefileName = args[a];
                }
            } else if (args[a].equals("-D")) {
                a += 1;
                if (a == args.length) {
                    usage();
                } else {
                    fileInfoName = args[a];
                }
            } else if (args[a].startsWith("-")) {
                usage();
            } else {
                break;
            }
        }

        ArrayList<String> targets = new ArrayList<String>();

        for (; a < args.length; a += 1) {
            targets.add(args[a]);
        }

        make(makefileName, fileInfoName, targets);
    }

    /** Carry out the make procedure using MAKEFILENAME as the makefile,
     *  taking information on the current file-system state from FILEINFONAME,
     *  and building TARGETS, or the first target in the makefile if TARGETS
     *  is empty.
     */
    private static void make(String makefileName, String fileInfoName,
                             List<String> targets) {
        // FILL IN
    }

    /** Print a brief usage message and exit program abnormally. */
    private static void usage() {
        // FILL THIS IN
        System.exit(1);
    }

}