package main;

import database.ConnectionBuilder;
import java.util.Arrays;

/**
 * The main class containing the main method.
 */
public class Main {

    private final ConnectionBuilder cb;

    public static void main(String[] args) {
        Main main;
        try {
            main = new Main(args);
        } catch (IllegalArgumentException ex) {
            System.err.println(ex.getMessage());
            System.exit(1);
            return;
        }
        main.run();
    }

    private String[] leftover_params;

    public Main(String[] args) {
        cb = new ConnectionBuilder()
                .setServerName("localhost")
                .setUsername("twitter")
                .setPassword("2IOC02")
                .setDbName("twitter");

        parseGlobalOptions(args);
    }

    public void run() {
        try {
            FarmShell shell = new FarmShell(cb);
            if (leftover_params != null && leftover_params.length > 0) {
                shell.execute(leftover_params);
            }
            shell.process_forever();
        } catch (IllegalArgumentException ex) {
            System.err.println(ex.getMessage());
            System.exit(1);
        }
    }

    private void parseGlobalOptions(String[] args)
            throws IllegalArgumentException {
        /* parse global options */
        for (int i = 0; i < args.length; i++) {
            if ("--dbhost".equals(args[i])) {
                cb.setServerName(getArg(args, ++i, "--dbhost"));
            } else if ("--dbuser".equals(args[i])) {
                cb.setUsername(getArg(args, ++i, "--dbuser"));
            } else if ("--dbpass".equals(args[i])) {
                cb.setPassword(getArg(args, ++i, "--dbpass"));
            } else if ("--dbport".equals(args[i])) {
                cb.setPort(Integer.valueOf(getArg(args, ++i, "--dbport")));
            } else if ("--dbname".equals(args[i])) {
                cb.setDbName(getArg(args, ++i, "--dbname"));
            } else if (args[i].startsWith("-")) {
                throw new IllegalArgumentException("Invalid option: " + args[i]);
            } else {
                leftover_params = Arrays.copyOfRange(args, i, args.length);
                break;
            }
        }
    }

    private String getArg(String[] params, int index, String name) {
        if (index >= params.length) {
            throw new IllegalArgumentException("Missing argument for parameter " + name);
        }
        return params[index];
    }
}