package com.lcjian.library.util;


import android.app.Dialog;
import android.content.Context;
import androidx.fragment.app.Fragment;
import android.view.Gravity;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;

public class DialogUtils {

    private static final String TAG = DialogUtils.class.getName();

    /**
     * @param dialog
     * @param fragment
     * @param hasStatusBar 该页面是否具有statusBar。有，在不包括状态栏的区域居中；没有，在该整个区域居中。
     */
    public static void setDialogInFragmentsCenter(Dialog dialog, Fragment fragment, final boolean hasStatusBar) {

        // 1、获取Dialog所述的Window，以及LayoutParams(布局参数)
        final Window dialogWindow = dialog.getWindow();
        dialogWindow.setFlags(WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE, WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE);
        final WindowManager.LayoutParams lp = dialogWindow.getAttributes();

        // 2、获取到Fragment所处的View
        final View fragmentView = fragment.getView();
        // 3、获取到Dialog的DecorView
        final View dialogView = dialogWindow.getDecorView();
        dialogView.setVisibility(View.INVISIBLE);
        dialogView.post(new Runnable() {
            @Override
            public void run() {
                // 4、获取到Fragment左上角点的距离整个屏幕的距离
                int[] location = new int[2];
                fragmentView.getLocationOnScreen(location);
                int fragmentWidth = fragmentView.getMeasuredWidth();
                int fragmentHeight = fragmentView.getMeasuredHeight();


                // 5、获取到Dialog的宽高
                int dialogWith = dialogView.getMeasuredWidth();
                int dialogHeight = dialogView.getMeasuredHeight();

                // 6、获取到标题栏的宽高
                int mStatusBarHeight = 0;

                if (hasStatusBar) {
                    // 有状态栏，需要去除状态栏的影响。
                    mStatusBarHeight = getStatusBarHeight(fragmentView.getContext());
                }


                // 7、Dialog从左上角开始排
                dialogWindow.setGravity(Gravity.START | Gravity.TOP);
                // x = fragment的x + fragment宽度/2 - Dialog宽度/2
                lp.x = location[0] + fragmentWidth / 2 - dialogWith / 2;
                // y = fragment的y + fragment高度/2 - Dialog高度/2 - 状态栏高度(Gravity.TOP会自动偏移状态栏的高度)
                lp.y = location[1] + fragmentHeight / 2 - dialogHeight / 2 - mStatusBarHeight;

                // 8、设置Window的属性
                dialogWindow.setAttributes(lp);
                // 9、展示出Dialog
                dialogView.setVisibility(View.VISIBLE);
            }
        });
    }

    public static int getStatusBarHeight(Context context) {
        /**
         * 获取状态栏高度——方法2
         * */
        int statusBarHeight = -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());
            statusBarHeight = context.getResources().getDimensionPixelSize(height);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return statusBarHeight;
    }
}