package com.example.panorama.utils;

import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.content.res.Configuration;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;

public class DTUtils {
	
	public static class DTOfflineException extends Exception {


		private static final long serialVersionUID = 657312995191631408L;

		public DTOfflineException(String detailMessage) {
			super(detailMessage);
		}
	}
	

	public static boolean isNetworkAvailable(Context context) {
		if (context.checkCallingOrSelfPermission(Manifest.permission.INTERNET) != PackageManager.PERMISSION_GRANTED) {
			return false;
		}
		ConnectivityManager connMgr = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
		NetworkInfo netInfo = connMgr.getActiveNetworkInfo();
		return netInfo != null && netInfo.isConnected();
	}
	
	public static float dpToPx(Context context, float dp) {
		if (context == null) {
			return -1;
		}
		return dp * context.getResources().getDisplayMetrics().density;
	}

	public static float pxToDp(Context context, float px) {
		if (context == null) {
			return -1;
		}
		return px / context.getResources().getDisplayMetrics().density;
	}

	public static float dpToPxInt(Context context, float dp) {
		return (int) (dpToPx(context, dp) + 0.5f);
	}

	public static float pxToDpCeilInt(Context context, float px) {
		return (int) (pxToDp(context, px) + 0.5f);
	}
	
	 /**
     * 将px值转换为sp值，保证文字大小不变
     * 
     * @param pxValue
     * @return
     */ 
    public static int px2sp(Context context, float pxValue) {
        final float fontScale = context.getResources().getDisplayMetrics().scaledDensity; 
        return (int) (pxValue / fontScale + 0.5f); 
    } 
   
    /**
     * 将sp值转换为px值，保证文字大小不变
     * 
     * @param spValue
     * @return
     */ 
    public static int sp2px(Context context, float spValue) {
        final float fontScale = context.getResources().getDisplayMetrics().scaledDensity; 
        return (int) (spValue * fontScale + 0.5f); 
    } 
	
	/**
	 * 获得状态栏的高度
	 * @param context
	 * @return
	 */
	public static int getStatusHeight(Context context) {

		int statusHeight = -1;
		try {
			Class<?> clazz = Class.forName("com.android.internal.R$dimen");
			Object object = clazz.newInstance();
			int height = Integer.parseInt(clazz.getField("status_bar_height").get(object).toString());
			statusHeight = context.getResources().getDimensionPixelSize(height);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return statusHeight;
	}
	
	/**
	 * 获得屏幕横向像素
	 * @param context
	 * @return
	 */
	public static int getScreenWidth(Context context) {
		return context.getResources().getDisplayMetrics().widthPixels;
	}

	public static boolean isLandscape(Context context) {
		if (context.getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
			return true;
		}
		return false;
	}
}