package com.icystar.dicegenerator;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Random;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.TextView;

public class MainActivity extends Activity {
	public static final int MAX_COUNT_ORDER = 100;
	public static final int MAX_DICE_ORDER = 100;
	
	public enum Mode {
		ENTER_COUNT,
		ENTER_DICEMAX,
		SHOW_RESULT
	}
	
	public static class Drop {
		public Mode mode = Mode.ENTER_COUNT;
		public int count = 0;
		public int diceMax = 0;
		public int[] dices = new int[0];
		public int summ = 0;

		public final static String template = "000d000 → 000000 …";
		public final static String diceTemplate = "000";
		
		public String toString(boolean small) {
			String text = ""; 
	    	switch(mode) {
			case SHOW_RESULT:
				if (!small) text = " " + Arrays.toString(dices) + text;
				text = " → " + Integer.toString(summ) + text;
			case ENTER_DICEMAX:
				text = "d" + Integer.toString(diceMax) + text;
			case ENTER_COUNT:
				text = Integer.toString(count) + text;
			}
	    	return text;
		}

		@Override
		public String toString() {
			return toString(false);
		}
	}
	
	public static Random random = new Random();
	public static List<Drop> drops = new ArrayList<Drop>(Arrays.asList((new Drop[]{new Drop()})));
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        synchronized(drops) {
        	updateText();
        }
    }
    
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main_menu, menu);
        return true;
    }
    
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
    	switch (item.getItemId()) {
		case R.id.item1:
			Intent intent = new Intent(Intent.ACTION_VIEW);
			intent.setData(Uri.parse(getString(R.string.aboutUri)));
			startActivity(intent);
			return true;
		default:
	    	return super.onOptionsItemSelected(item);
		}
    }
    
    private void resetDices() {
    	drops.add(new Drop());
    }
    
    private void resetDices(Drop drop) {
    	Drop newdrop = new Drop();
    	newdrop.count = drop.count;
    	newdrop.diceMax = drop.diceMax;
    	newdrop.dices = new int[newdrop.count];
    	newdrop.summ = 0;
   		drops.add(newdrop);
    }

    private Drop getCurrent() {
   		return drops.get(drops.size()-1);
    }
    
    private void dropDices() {
    	Drop drop = getCurrent();
    	
    	drop.dices = new int[drop.count];
    	drop.summ = 0;
    	for(int i = 0; i < drop.count; i++)
    		drop.summ += drop.dices[i] = random.nextInt(drop.diceMax) + 1;
    }
    
    private void updateText() {
    	Drop drop = getCurrent();
    	TextView textView = (TextView)findViewById(R.id.textView1);
    	textView.setText(drop.toString());
    }
    
    public void onButton(View view) {
    	synchronized (drops) {
	    	Drop drop = getCurrent();
	    	int numButton = -1;
	    	boolean backspaceButton = false;
	    	boolean diceButton = false;
	    	boolean rollButton = false;
	    	boolean historyButton = false;
	    	
	    	switch(view.getId()) {
	    	case R.id.button1: numButton = 1; break;
	    	case R.id.button2: numButton = 2; break;
	    	case R.id.button3: numButton = 3; break;
	    	case R.id.button4: numButton = 4; break;
	    	case R.id.button5: numButton = 5; break;
	    	case R.id.button6: numButton = 6; break;
	    	case R.id.button7: numButton = 7; break;
	    	case R.id.button8: numButton = 8; break;
	    	case R.id.button9: numButton = 9; break; 
	    	case R.id.button10: numButton = 0; break;
	    	case R.id.buttonBackspace: backspaceButton = true; break;
	    	case R.id.buttonHistory: historyButton = true; break;
	    	case R.id.buttonDice: diceButton = true; break;
	    	case R.id.buttonRoll: rollButton = true; break;
	    	}
	    	
	    	if (historyButton) {
	        	startActivity(new Intent(this, HistoryActivity.class));
	    	} else {
				switch(drop.mode) {
				case ENTER_COUNT:
					if (numButton >= 0) {
						if (drop.count < MAX_COUNT_ORDER)
							drop.count = drop.count*10 + numButton;
					} else
					if (backspaceButton) {
						drop.count = 0;
					} else
					if (diceButton) {
						if (drop.count == 0) drop.count = 1;
						drop.mode = Mode.ENTER_DICEMAX;
					} else
					if (rollButton) {
						if (drop.count == 0) drop.count = 1;
						if (drop.diceMax == 0) drop.diceMax = 6;
						dropDices();
						drop.mode = Mode.SHOW_RESULT;
					}
					break;
				case ENTER_DICEMAX:
					if (numButton >= 0) {
						if (drop.diceMax < MAX_DICE_ORDER)
							drop.diceMax = drop.diceMax*10 + numButton;
					} else				
					if (backspaceButton) {
						drop.count = 0;
						drop.diceMax = 0;
						drop.mode = Mode.ENTER_COUNT;
					} else
					if (diceButton) {
						// do nothing
					} else
					if (rollButton) {
						if (drop.diceMax <= 1) drop.diceMax = 6;
						dropDices();
						drop.mode = Mode.SHOW_RESULT;
					}
					break;
				case SHOW_RESULT:
			    	if (numButton >= 0) {
			    		resetDices();
			    		getCurrent().count = numButton;
			    	} else
					if (backspaceButton) {
			    		resetDices();
					} else
					if (diceButton) {
			    		resetDices();
			    		getCurrent().count = 1;
			    		getCurrent().mode = Mode.ENTER_DICEMAX;
					} else
					if (rollButton) {
			    		resetDices(drop);
						dropDices();
						getCurrent().mode = Mode.SHOW_RESULT;
					}
					break;
				}
				
				updateText();
	    	}
    	}
    }

    public void onText(View view) {
    	if (getCurrent().mode == Mode.SHOW_RESULT) {
			Intent intent = new Intent(this, DicesActivity.class);
			intent.putExtra("index", drops.size()-1);
			startActivity(intent);
    	}
    }

}