/**
 * Using SQLite in Vala Sample Code
 * Port of an example found on the SQLite site.
 * http://www.sqlite.org/quickstart.html
 */

using GLib;
using Sqlite;

public class SqliteSample : GLib.Object {

    public static int callback (int n_columns, string[] values,
                                string[] column_names)
    {
        for (int i = 0; i < n_columns; i++) {
            stdout.printf ("%s = %s\n", column_names[i], values[i]);
        }
        stdout.printf ("\n");

        return 0;
    }

    public static int main (string[] args) {
        Database db;
        int rc;

        if (args.length != 3) {
            stderr.printf ("Usage: %s DATABASE SQL-STATEMENT\n", args[0]);
            return 1;
        }

        if (!FileUtils.test (args[1], FileTest.IS_REGULAR)) {
            stderr.printf ("Database %s does not exist or is directory\n", args[1]);
            return 1;
        }

        rc = Database.open (args[1], out db);

        if (rc != Sqlite.OK) {
            stderr.printf ("Can't open database: %d, %s\n", rc, db.errmsg ());
            return 1;
        }

        rc = db.exec (args[2], callback, null);
        /* maybe it is better to use closures, so you can access local variables, eg: */
        /*rc = db.exec(args[2], (n_columns, values, column_names) => {
            for (int i = 0; i < n_columns; i++) {
                stdout.printf ("%s = %s\n", column_names[i], values[i]);
            }
            stdout.printf ("\n");

            return 0;
            }, null);
        */

        if (rc != Sqlite.OK) { 
            stderr.printf ("SQL error: %d, %s\n", rc, db.errmsg ());
            return 1;
        }

        return 0;
    }
}