/*
    Display2.java
    CIS 111
    10/31/07
    David Klick

    This program displays the text file generated by Create1.java
    using a nicely formatted report using control breaks.
*/

public class Display2 extends CIS111App {
    public static void main(String[] args) {
        int year;
        int month;
        int day;
        double amt;

        double monthTot;
        double grandTot;

        int prevMonth;
        String filename;
        String rptname;
        int recs;

        SequentialFile filein, fileout;

        clearConsole();
        recs = 0;
        monthTot = 0.0;
        grandTot = 0.0;
        prevMonth = 0;

        // open report (output) file and print header
        rptname = "report.txt";
        fileout = new SequentialFile(rptname, FileMode.OUTPUT);
        fileout.println("Daily sales (month totals)");
        fileout.println();

        // open data (input) file
        filein = new SequentialFile("sales.txt", FileMode.INPUT);

        // process each data record
        while (!filein.eof()) {
            // read in next record
            year = filein.readInt();
            month = filein.readInt();
            day = filein.readInt();
            amt = filein.readDouble();
            recs = recs + 1;

            // check for control break
            //   does current record's month = last record's month?
            //   Note: This won't work properly if data is not sorted or
            //         if gaps of 12 months in the data are allowed.
            if (prevMonth != month && recs > 1) {
                fileout.printf("Month %2d     %13s\n", prevMonth, formatCurrency(monthTot, "##,###,##0.00"));
                fileout.println();
                grandTot = grandTot + monthTot;
                monthTot = 0;
            }

            // display details for record
            prevMonth = month;
            fileout.printf("%02d/%02d/%04d   %13s\n", month, day, year, formatCurrency(amt, "##,###,##0.00"));
            monthTot = monthTot + amt;
        }

        // do control break processing automatically for last record
        fileout.printf("Month %2d     %13s\n", prevMonth, formatCurrency(monthTot, "##,###,##0.00"));
        grandTot = grandTot + monthTot;
        monthTot = 0;

        // print grand totals to report
        fileout.println();
        fileout.printf("Total        %13s\n", formatCurrency(grandTot, "##,###,##0.00"));
        fileout.println();

        // print out end of report (footer)
        fileout.printf("End of report (%d records processed)\n", recs);

        // display something to let user know program worked
        printf("End of report (%d records processed)\n", recs);

        // close files
        filein.close();
        fileout.close();
    }
}