package com.classic.android.utils;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Rect;
import android.support.annotation.NonNull;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.WindowManager;

/**
 * 与屏幕相关的工具类，可以方便的设置全屏模式，可以得到屏幕的宽度高度。
 *
 * @author Jack Tony
 */
@SuppressWarnings({"unused", "WeakerAccess"}) public final class WindowUtil {

    private WindowUtil() { }

    /**
     * 设置当前界面为全屏模式
     */
    public static void setFullScreen(@NonNull Activity activity) {
        activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
        activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
    }

    /**
     * 如果当前为全屏，那么取消全屏模式，回到正常的模式
     */
    public static void cancelFullScreen(@NonNull Activity activity) {
        activity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
    }

    /**
     * 判断当前手机是否是全屏
     *
     * @return 如果是true，那么当前就是全屏
     */
    public static boolean isFullScreen(@NonNull Activity activity) {
        int flag = activity.getWindow().getAttributes().flags;
        return (flag & WindowManager.LayoutParams.FLAG_FULLSCREEN) ==
               WindowManager.LayoutParams.FLAG_FULLSCREEN;
    }

    /**
     * 判断当前屏幕是否是横屏
     *
     * @param activity 当前的activity
     * @return 如果true就是竖屏
     */
    public static boolean isVerticalScreen(@NonNull Activity activity) {
        int flag = activity.getResources().getConfiguration().orientation;
        return flag != 0;
    }

    /**
     * 获得屏幕高度
     */
    public static int getScreenWidth(@NonNull Context context) {
        WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        if (wm != null) {
            DisplayMetrics outMetrics = new DisplayMetrics();
            wm.getDefaultDisplay().getMetrics(outMetrics);
            return outMetrics.widthPixels;
        }
        return 0;
    }

    /**
     * 获得屏幕宽度
     */
    public static int getScreenHeight(@NonNull Context context) {
        WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        if (wm != null) {
            DisplayMetrics outMetrics = new DisplayMetrics();
            wm.getDefaultDisplay().getMetrics(outMetrics);
            return outMetrics.heightPixels;
        }
        return 0;
    }

    /**
     * 获得状态栏的高度
     */
    public static int getStatusHeight(@NonNull Context context) {
        int statusHeight = -1;
        try {
            @SuppressLint("PrivateApi")
            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;
    }

    /**
     * 获取当前屏幕截图，包含状态栏
     */
    public static Bitmap snapShotWithStatusBar(@NonNull Activity activity) {
        View view = activity.getWindow().getDecorView();
        view.setDrawingCacheEnabled(true);
        view.buildDrawingCache();
        Bitmap bmp = view.getDrawingCache();
        int width = getScreenWidth(activity);
        int height = getScreenHeight(activity);
        Bitmap bp = Bitmap.createBitmap(bmp, 0, 0, width, height);
        view.destroyDrawingCache();
        return bp;
    }

    /**
     * 获取当前屏幕截图，不包含状态栏
     */
    public static Bitmap snapShotWithoutStatusBar(@NonNull Activity activity) {
        View view = activity.getWindow().getDecorView();
        view.setDrawingCacheEnabled(true);
        view.buildDrawingCache();
        Bitmap bmp = view.getDrawingCache();
        Rect frame = new Rect();
        activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
        int statusBarHeight = frame.top;

        int width = getScreenWidth(activity);
        int height = getScreenHeight(activity);
        Bitmap bp = Bitmap.createBitmap(bmp, 0, statusBarHeight, width, height - statusBarHeight);
        view.destroyDrawingCache();
        return bp;
    }
}