package com.smartdot.cgt.util;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;

public class BitmapConvert {

    /**
     * 根据源图片文件进行缩放并读取至内存
     * 
     * @param sourceFileName
     * @return
     */
    public static Bitmap resizeBitmap(String sourceFileName) {
        int toSize = ApplicationMain.getInstance().getCgtConfig().getUploadImageLength();

        Bitmap resizedBitmap = null;

        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeFile(sourceFileName, options);

        options.inJustDecodeBounds = false;

        int width = options.outWidth;
        int height = options.outHeight;
        if (width > toSize || height > toSize) {
            float temp = ((float) height) / ((float) width);
            int newHeight = 0, newWidth = 0;
            if (temp > 1) {
                newHeight = toSize;
                newWidth = (int) (newHeight / temp);
            } else {
                newWidth = toSize;
                newHeight = (int) (newWidth * temp);
            }
            float scaleWidth = ((float) width) / newWidth;

            int i = 1;
            while (true) {
                if (scaleWidth < Math.pow(2, i)) {
                    double left = scaleWidth - Math.pow(2, i - 1);
                    double right = Math.pow(2, i) - scaleWidth;
                    options.inSampleSize = (left > right) ? (int) Math.pow(2, i) : (int) Math.pow(2, i - 1);
                    break;
                }
                i++;
            }
        } else {
            options.inSampleSize = 1;
        }
        FileInputStream is = null;
        try {
            is = new FileInputStream(sourceFileName);
            resizedBitmap = BitmapFactory.decodeStream(is, null, options).copy(Bitmap.Config.ARGB_8888, true);

            SimpleDateFormat sdf1 = new SimpleDateFormat("yyyy-MM-dd");
            SimpleDateFormat sdf2 = new SimpleDateFormat("HH:mm:ss");
            Date date = new Date();
            Paint paint = new Paint();
            paint.setARGB(255, 255, 20, 20);
            paint.setTextSize(20);
            paint.setAntiAlias(true);
            paint.setTextAlign(Paint.Align.RIGHT);
            float textWidth=paint.measureText("a");
            Canvas canvas = new Canvas(resizedBitmap);
            // 画日期
            canvas.drawText(sdf1.format(date), resizedBitmap.getWidth() - textWidth, resizedBitmap.getHeight() - textWidth*3, paint);
            // 画时间
            canvas.drawText(sdf2.format(date), resizedBitmap.getWidth() - textWidth, resizedBitmap.getHeight() - textWidth*1, paint);
            String userName = "", userId = "";
            if (ApplicationMain.getInstance().getUserModel() != null) {
                userId = ApplicationMain.getInstance().getUserModel().getUserId();
              //  userName = ApplicationMain.getInstance().getUserModel().getUserName();
            }
            // 画用户信息
            canvas.drawText(userName + "(" + userId + ")", resizedBitmap.getWidth() - textWidth,
                resizedBitmap.getHeight() - textWidth*5, paint);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } finally {
            if (is != null) {
                try {
                    is.close();
                } catch (IOException e) {
                }
            }
        }
        return resizedBitmap;
    }
}