package dk.thoerup.side9;

import java.io.File;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.util.ArrayList;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;

public class PictureView extends Activity {

	final static String TAG = "Side9Pigen";
	
	TextView mDescription;
	TextView mCaption;
	ImageView mImageView;
	ArrayList<String> mImagePaths;
	int mIndex;
	
	
	Bitmap mBitmap;
	
	@SuppressWarnings("unchecked")
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.pictureview);
		
		mImagePaths = (ArrayList<String>) getIntent().getSerializableExtra("files");
		mIndex = getIntent().getIntExtra("index", 0);
		
		
		mImageView = (ImageView) findViewById(R.id.imageview);
		mImageView.setOnTouchListener( new Touch() );
				
		mDescription = (TextView) findViewById(R.id.description);
		mCaption = (TextView) findViewById(R.id.caption);
		
		loadImage();
		
	}
	
	private void loadImage(int newIndex) {
		Log.e(TAG, "NewIndex " + newIndex);
		if (newIndex != mIndex) {
			mIndex = newIndex;
			loadImage();
		}
	}
	
	private void loadImage() {
		String currentFile = mImagePaths.get(mIndex);
		mBitmap = BitmapFactory.decodeFile( currentFile );
		mImageView.setImageBitmap(mBitmap);		
		
		String pathParts[] = currentFile.split("/");
		String fileName = pathParts[ pathParts.length -1];
		String desc = "" + (mIndex +1) + "/" + mImagePaths.size() + " - " + fileName;
		mDescription.setText(desc);
		
		String infoFileName = currentFile.replace(".jpg", ".txt");

		File infoFile = new File(infoFileName);
		if (infoFile.exists() ) {
			String caption = getFileContent(infoFile);
			mCaption.setVisibility(View.VISIBLE);
			mCaption.setText(caption);

		} else {
			mCaption.setVisibility(View.INVISIBLE);
		}
	}
	
	String getFileContent(File filename) {
		try {
			RandomAccessFile raf = new RandomAccessFile(filename, "r");
			int size = (int)raf.length();
			byte buf[] = new byte[size];
			
			raf.readFully(buf);
			return new String(buf);			
		} catch (IOException e) {
			Log.e(TAG, "Error", e);
			return "";
		}
	}
	
	class Touch implements View.OnTouchListener {

		Float firstX = null;
		
		
		@Override
		public boolean onTouch(View v, MotionEvent event) {
			if (event.getAction() == MotionEvent.ACTION_DOWN) {
				firstX = event.getX();
			} else {
				if (firstX != null) {
					float x = event.getX();					
					float diff = firstX - x;					
					
					if (diff > 150) {
						int newIndex = Math.min(mIndex+1, mImagePaths.size() -1);										
						loadImage(newIndex);
						firstX = null;
						return false;
					}
					
					if (diff < -150) {
						int newIndex = Math.max(mIndex-1, 0);						
						loadImage(newIndex);
						firstX = null;
						return false;
					}
				}	
			}
			
			return true;
		}
		
	}
}