package com.lzy.imagepicker.util;

import android.app.Activity;
import android.content.Context;
import android.os.Build;
import android.os.Environment;
import android.util.DisplayMetrics;
import android.util.TypedValue;
import android.view.Display;
import android.view.KeyCharacterMap;
import android.view.KeyEvent;
import android.view.ViewConfiguration;
import android.view.WindowManager;

/**
 * ================================================
 * 作    者：jeasonlzy（廖子尧 Github地址：https://github.com/jeasonlzy0216
 * 版    本：1.0
 * 创建日期：2016/5/19
 * 描    述：
 * 修订历史：
 * ================================================
 */
public class Utils {

    /** 获得状态栏的高度 */
    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;
    }

    /** 根据屏幕宽度与密度计算GridView显示的列数， 最少为三列，并获取Item宽度 */
    public static int getImageItemWidth(Activity activity) {
        int screenWidth = activity.getResources().getDisplayMetrics().widthPixels;
        int densityDpi = activity.getResources().getDisplayMetrics().densityDpi;
        int cols = screenWidth / densityDpi;
        cols = cols < 3 ? 3 : cols;
        int columnSpace = (int) (2 * activity.getResources().getDisplayMetrics().density);
        return (screenWidth - columnSpace * (cols - 1)) / cols;
    }

    /**
     * 判断SDCard是否可用
     */
    public static boolean existSDCard() {
        return Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED);
    }

    /**
     * 获取手机大小（分辨率）
     */
    public static DisplayMetrics getScreenPix(Activity activity) {
        DisplayMetrics displaysMetrics = new DisplayMetrics();
        activity.getWindowManager().getDefaultDisplay().getMetrics(displaysMetrics);
        return displaysMetrics;
    }

    /** dp转px */
    public static int dp2px(Context context, float dpVal) {
        return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dpVal, context.getResources().getDisplayMetrics());
    }

    /**
     * 判断手机是否含有虚拟按键  99%
     */
    public static boolean hasVirtualNavigationBar(Context context) {
        boolean hasSoftwareKeys = true;

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
            Display d = ((WindowManager) context.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();

            DisplayMetrics realDisplayMetrics = new DisplayMetrics();
            d.getRealMetrics(realDisplayMetrics);

            int realHeight = realDisplayMetrics.heightPixels;
            int realWidth = realDisplayMetrics.widthPixels;

            DisplayMetrics displayMetrics = new DisplayMetrics();
            d.getMetrics(displayMetrics);

            int displayHeight = displayMetrics.heightPixels;
            int displayWidth = displayMetrics.widthPixels;

            hasSoftwareKeys = (realWidth - displayWidth) > 0 || (realHeight - displayHeight) > 0;
        } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
            boolean hasMenuKey = ViewConfiguration.get(context).hasPermanentMenuKey();
            boolean hasBackKey = KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_BACK);
            hasSoftwareKeys = !hasMenuKey && !hasBackKey;
        }

        return hasSoftwareKeys;
    }

    /**
     * 获取导航栏高度，有些没有虚拟导航栏的手机也能获取到，建议先判断是否有虚拟按键
     */
    public static int getNavigationBarHeight(Context context) {
        int resourceId = context.getResources().getIdentifier("navigation_bar_height", "dimen", "android");
        return resourceId > 0 ? context.getResources().getDimensionPixelSize(resourceId) : 0;
    }
}