package com.future.dispatch.utils;

import android.graphics.Rect;
import android.view.View;
import android.view.ViewTreeObserver;

import java.util.LinkedList;
import java.util.List;

/***
 * 监听键盘打开关闭 并回调高度
 */
public class SoftKeyBroadManager implements ViewTreeObserver.OnGlobalLayoutListener{

    public interface SoftKeyboardStateListener {
        void onSoftKeyboardOpened(int keyboardHeightInPx);
        void onSoftKeyboardClosed(int keyboardHeightInPx);
    }

    private final List<SoftKeyboardStateListener> listeners = new LinkedList<SoftKeyboardStateListener>();
    private final View activityRootView;
    private int lastSoftKeyboardHeightInPx;
    private boolean isSoftKeyboardOpened;

    public SoftKeyBroadManager(View activityRootView) {
        this(activityRootView,false);
    }

    public SoftKeyBroadManager(View activityRootView, boolean isSoftKeyboardOpened) {
        listeners.add(OneManager);
        this.activityRootView = activityRootView;
        this.isSoftKeyboardOpened = isSoftKeyboardOpened;
        activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(this);
    }

    public static int height_jp;

    @Override
    public void onGlobalLayout() {
        final Rect r = new Rect();
        activityRootView.getWindowVisibleDisplayFrame(r);
        int rootHeight = activityRootView.getRootView().getHeight();
        final int heightDiff = rootHeight - (r.bottom - r.top);
        if (!isSoftKeyboardOpened && heightDiff > 500) {
// 如果高度超过500 键盘可能被打开
            isSoftKeyboardOpened = true;
            height_jp = heightDiff;
            notifyOnSoftKeyboardOpened(heightDiff);
        } else if (isSoftKeyboardOpened && heightDiff < 500) {
            isSoftKeyboardOpened = false;
            notifyOnSoftKeyboardClosed(height_jp);
        }
    }

    public void setIsSoftKeyboardOpened(boolean isSoftKeyboardOpened) {
        this.isSoftKeyboardOpened = isSoftKeyboardOpened;
    }

    public boolean isSoftKeyboardOpened() {
        return isSoftKeyboardOpened;
    }


    public int getLastSoftKeyboardHeightInPx() {
        return lastSoftKeyboardHeightInPx;
    }

    public void addSoftKeyboardStateListener(SoftKeyboardStateListener listener) {
        listeners.add(listener);
    }

    public void removeSoftKeyboardStateListener(SoftKeyboardStateListener listener) {
        listeners.remove(listener);
    }

    private void notifyOnSoftKeyboardOpened(int keyboardHeightInPx) {
        this.lastSoftKeyboardHeightInPx = keyboardHeightInPx;

        for (SoftKeyboardStateListener listener : listeners) {
            if (listener != null) {
                listener.onSoftKeyboardOpened(keyboardHeightInPx);
            }
        }
    }

    private void notifyOnSoftKeyboardClosed(int h) {
        for (SoftKeyboardStateListener listener : listeners) {
            if (listener != null) {
                listener.onSoftKeyboardClosed(h);
            }
        }
    }

    public SoftKeyboardStateListener OneManager = new SoftKeyboardStateListener() {
        @Override
        public void onSoftKeyboardOpened(int keyboardHeightInPx) {
            activityRootView.setScrollY(keyboardHeightInPx);
        }

        @Override
        public void onSoftKeyboardClosed(int keyboardHeightInPx) {
            activityRootView.setScrollY(0);
        }

    };

}