package com.basic.security.utils;

import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Context;
import android.graphics.Rect;
import android.os.Build;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.ViewGroup;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;

import com.basic.security.base.BaseApplication;

public class KeyboardUtil {
    public static void setupUI(View view) {
        // Set up touch listener for non-text box views to hide keyboard.
        if (!(view instanceof EditText)) {
            view.setOnTouchListener((v, event) -> {
                KeyboardUtil.hideSoftKeyboard();
                return false;
            });
        }
        //If a layout container, iterate over children and seed recursion.
        if (view instanceof ViewGroup) {
            for (int i = 0; i < ((ViewGroup) view).getChildCount(); i++) {
                View innerView = ((ViewGroup) view).getChildAt(i);
                setupUI(innerView);
            }
        }
    }

    public static void hideSoftKeyboard() {
        Activity activity = BaseApplication.getApplication().activity;
        InputMethodManager inputMethodManager =
                (InputMethodManager) activity.getSystemService(
                        Activity.INPUT_METHOD_SERVICE);
        View view = activity.getCurrentFocus();
        if (view != null) {
            inputMethodManager.hideSoftInputFromWindow(
                    view.getWindowToken(), 0);
        }
    }

    public static void showKeyboard() {
        InputMethodManager imm = (InputMethodManager) BaseApplication.getApplication().activity.getSystemService(Context.INPUT_METHOD_SERVICE);
        imm.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0);
    }

    public static boolean isSoftShowing(Activity activity) {
        //获取当前屏幕内容的高度
        int screenHeight = activity.getWindow().getDecorView().getHeight();
        //获取View可见区域的bottom
        Rect rect = new Rect();
        //DecorView即为activity的顶级view
        activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(rect);
        //考虑到虚拟导航栏的情况（虚拟导航栏情况下：screenHeight = rect.bottom + 虚拟导航栏高度）
        //选取screenHeight*2/3进行判断
        return screenHeight * 2 / 3 > rect.bottom + getSoftButtonsBarHeight(activity);
    }

    /**
     * 底部虚拟按键栏的高度
     *
     * @return
     */
    @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
    private static int getSoftButtonsBarHeight(Activity activity) {
        DisplayMetrics metrics = new DisplayMetrics();
        //这个方法获取可能不是真实屏幕的高度
        activity.getWindowManager().getDefaultDisplay().getMetrics(metrics);
        int usableHeight = metrics.heightPixels;
        //获取当前屏幕的真实高度
        activity.getWindowManager().getDefaultDisplay().getRealMetrics(metrics);
        int realHeight = metrics.heightPixels;
        if (realHeight > usableHeight) {
            return realHeight - usableHeight;
        } else {
            return 0;
        }
    }
}