/*Drew Schuster
  dtschust
  ECE462
*/

package com.github.dtschust.zork;

import com.github.dtschust.zork.parser.ParserIOC;
import com.github.dtschust.zork.repl.ActionDispatcher;

import java.io.PrintStream;
import java.util.Scanner;

/* And away we go*/
public class Zork {
    final ZorkGame game;
    final Scanner input = new Scanner(System.in);
    final PrintStream output = System.out;

    public Zork(final String filename) {
        game = ParserIOC.xmlParser().parse(filename);

        ActionDispatcher d = new ActionDispatcher(game, output);

        /* starting the game!*/
        d.dispatch("Start at Entrance");

        /* There is no stopping in Zork, until we're done!!*/
        while (game.isRunning()) {
            String userInput = input.nextLine();

            /*Now that we have the user command, check the input*/
            if (!game.evaluateTriggers(userInput)) {
                /* If we haven't skipped, perform the user action*/
                d.dispatch(userInput);

                // check the triggers again (various states have changed, gnomes need to be found!)
                game.evaluateTriggers("");
            }
        }

        // single point of termination
        System.exit(0);
    }

    /* I love how basic java main functions are sometimes.*/
    public static void main(String[] args) {
        if (args.length != 1) {
            System.out.println("Usage: java Zork [filename]");
            return;
        }
        new Zork(args[0]);
    }
}