package net.vvakame.sample;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;

public class EmojiView extends View {

	static final String TAG = RandomEmojiView.class.getSimpleName();

	List<String> mEmojiList;

	Paint mPaint;

	public EmojiView(Context context) {
		super(context);
		init();
	}

	public EmojiView(Context context, AttributeSet attrs) {
		super(context, attrs);
		init();
	}

	public EmojiView(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
		init();
	}

	void init() {
		mPaint = new Paint();
		mPaint.setColor(Color.argb(0xff, 0xff, 0x00, 0x00));
		mPaint.setStrokeWidth(1);
		mPaint.setTextSize(20);
		mPaint.setAntiAlias(true);

		mEmojiList = new ArrayList<String>();
		try {
			// EmojiSources.txt by
			// http://www.unicode.org/Public/6.0.0/ucd/EmojiSources.txt
			InputStream is = getContext().getAssets().open("EmojiSources.txt");
			BufferedReader br = new BufferedReader(new InputStreamReader(is));

  		String line;
			Pattern p = Pattern.compile("^([0-9a-fA-F]+\\s{0,1}[0-9a-fA-F]*);");
			while ((line = br.readLine()) != null) {
				Matcher m = p.matcher(line);
				if (!m.find()) {
					continue;
				}
				Log.d(TAG, m.group(1));
				String codePoint = m.group(1);
				String[] splited = codePoint.split(" ");
				if (splited.length == 1) {
					int c = Integer.parseInt(splited[0], 16);
					String s = new String(new int[] { c }, 0, 1);
					mEmojiList.add(s);
				} else {
					int c1 = Integer.parseInt(splited[0], 16);
					int c2 = Integer.parseInt(splited[1], 16);
					String s = new String(new int[] { c1, c2 }, 0, 2);
					mEmojiList.add(s);
				}
			}
		} catch (IOException e) {
			throw new RuntimeException(e);
		}
	}

	@Override
	protected void onDraw(Canvas canvas) {
		final int delta = 35;
		int x = 0;
		int y = delta;

		for (String emoji : mEmojiList) {
			canvas.drawRect(x, y, x + 1, y + 1, mPaint);
			canvas.drawText(emoji, x, y, mPaint);

			if (delta * 22 < x) {
				x = 0;
				y += delta;
			} else {
				x += delta;
			}
		}
	}
}