package com.example.sudoku;

import java.io.DataInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;

public class Sudoku extends Activity implements OnClickListener {

	private static final String TAG = "Sudoku";

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_sudoku);

		// Set up click listeners for all the buttons
		View continueButton = findViewById(R.id.continue_button);
		continueButton.setOnClickListener(this);

		View newButton = findViewById(R.id.new_button);
		newButton.setOnClickListener(this);

		View aboutButton = findViewById(R.id.about_button);
		aboutButton.setOnClickListener(this);

		View exitButton = findViewById(R.id.exit_button);
		exitButton.setOnClickListener(this);

		// The following segment is to test files on Android
		String fname = "test.dat";
		String data = "hello world!";

		try {
			InputStream is = openFileInput(fname);
			DataInputStream dis = new DataInputStream(is);
			Log.d(TAG, "test.dat exists, read contents");
			int length = dis.available();
			byte d[] = new byte[length];
			dis.readFully(d);
			Log.d(TAG, "File Content: " + new String(d));
			is.close();
		} catch (IOException ex) {
			Log.d(TAG, "test.dat doesn't exits, create one");
			try {
				FileOutputStream ps = openFileOutput("test.dat", MODE_PRIVATE);
				byte[] d = data.getBytes();
				ps.write(d);
				ps.close();
			} catch (IOException e) {
				Log.d(TAG, "error in creating test.dat");
			}
		}

	}

	@Override
	public void onClick(View v) {

		switch (v.getId()) {
		case R.id.about_button:
			Intent i = new Intent(this, About.class);
			startActivity(i);
			break;
		case R.id.new_button:
			openNewGameDialog();
			break;
		case R.id.continue_button:
			startGame(Game.DIFFICULTY_CONTINUE);
			break;
		case R.id.exit_button:
			finish();
			break;
		}

	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {

		super.onCreateOptionsMenu(menu);

		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.sudoku, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {

		switch (item.getItemId()) {
		case R.id.settings:
			startActivity(new Intent(this, Prefs.class));
			return true;
		}
		return false;
	}

	/** Ask the user what difficulty level they want */
	private void openNewGameDialog() {
		new AlertDialog.Builder(this)
				.setTitle(R.string.new_game_title)
				.setItems(R.array.difficulty,
						new DialogInterface.OnClickListener() {
							public void onClick(
									DialogInterface dialoginterface, int i) {
								startGame(i);
							}
						}).show();
	}

	/** Start a new game with the given difficulty level */
	private void startGame(int i) {
		Log.d(TAG, "clicked on " + i);

		Intent intent = new Intent(Sudoku.this, Game.class);
		intent.putExtra(Game.KEY_DIFFICULTY, i);
		startActivity(intent);
	}

	/** Action on resume */
	@Override
	protected void onResume() {

		super.onResume();
		Music.play(this, R.raw.main);
	}

	/** Action on pause */
	@Override
	protected void onPause() {

		super.onPause();
		Music.stop(this);
	}
}