package com.maornandroidkit.widgets;

import android.content.Context;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.util.Log;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.LinearLayout;
import android.widget.PopupWindow;

import com.facebook.react.bridge.JSApplicationIllegalArgumentException;
import com.facebook.react.bridge.ReactContext;
import com.facebook.react.touch.OnInterceptTouchEventListener;
import com.facebook.react.uimanager.JSTouchDispatcher;
import com.facebook.react.uimanager.RootView;
import com.facebook.react.uimanager.UIManagerModule;
import com.facebook.react.uimanager.events.EventDispatcher;
import com.facebook.react.views.view.ReactViewGroup;


class PopupWindowContentView extends ReactViewGroup implements RootView {
  public PopupWindowContentView(Context context) {
    super(context);
  }

  @Override
  public void onChildStartedNativeGesture(MotionEvent event) {

  }
}

public class MPopupWindow extends ReactViewGroup {

  private PopupWindowContentView mPopupWindowContentView;
  private PopupWindow mPopupWindow;
  private ReactContext mReactContext;
  private JSTouchDispatcher mJSTouchDispatcher;
  private boolean mPopupWindowContentViewInited;

  public MPopupWindow(Context context) {
    super(context);
    mReactContext = (ReactContext) context;

    mPopupWindowContentView = new PopupWindowContentView(context);
    mPopupWindowContentView.setLayoutParams(new ReactViewGroup.LayoutParams(
            LinearLayout.LayoutParams.WRAP_CONTENT,
            LinearLayout.LayoutParams.WRAP_CONTENT
    ));

    // 因为 mPopupWindowContentView被设置成 PopupWindow的 contentView 之后 就不与当前 ReactRootView
    // 是同一棵元素的树节点上，所以这里需要在 触摸事件被触发的时候取 自己发送事件消息到前端的JS层上
    mPopupWindowContentView.setOnInterceptTouchEventListener(new OnInterceptTouchEventListener() {
      @Override
      public boolean onInterceptTouchEvent(ViewGroup v, MotionEvent event) {
        dispatchJSTouchEvent(event);
        return false;
      }
    });

    mJSTouchDispatcher = new JSTouchDispatcher(mPopupWindowContentView);

    mPopupWindow = new PopupWindow(context);
    ColorDrawable dw = new ColorDrawable(Color.TRANSPARENT);
    mPopupWindow.setBackgroundDrawable(dw);
    mPopupWindow.setContentView(mPopupWindowContentView);
    mPopupWindow.setHeight(WindowManager.LayoutParams.WRAP_CONTENT);
    mPopupWindow.setWidth(WindowManager.LayoutParams.WRAP_CONTENT);
    mPopupWindow.setFocusable(true);
    mPopupWindow.setOutsideTouchable(true);
    mPopupWindow.setTouchable(true);
    mPopupWindow.dismiss();
  }

  public void showPopAsDropdown(int viewId, int x, int y) {
    View anchor = this.getRootView().findViewById(viewId);

    this.initPopupWindowContentView();

    if (anchor == null) {
      this.showPopAsLocation(Gravity.START, x, y);
      return;
    }

    this.resize(x, y);
    mPopupWindow.showAsDropDown(anchor, x, y);
  }

  public void showPopAsLocation(int gravity, int x, int y) {
    this.initPopupWindowContentView();

    this.resize(x, y);
    this.mPopupWindow.showAtLocation(
            this.getRootView(),
            gravity,
            x,
            y
    );
  }

  public void hide() {
    this.mPopupWindow.dismiss();
  }


  private void resize(int x, int y) {
    this.mPopupWindow.update(
            x,
            y,
            mPopupWindowContentView.getChildAt(0).getWidth(),
            mPopupWindowContentView.getChildAt(0).getHeight()
    );
  }

  public void initPopupWindowContentView() {
    if (!mPopupWindowContentViewInited) {
      View view = this.getChildAt(0);
      if (view == null) {
        return;
      }
      this.removeView(view);

      mPopupWindowContentView.addView(view);
      view.requestLayout();

      mPopupWindowContentViewInited = true;
    }
  }

  @Override
  public void setFocusable(boolean focusable) {
    this.mPopupWindow.setFocusable(focusable);
  }

  public void setOutsideTouchable(boolean touchable) {
    mPopupWindow.setOutsideTouchable(touchable);
  }

  public void setTouchable(boolean touchable) {
    this.mPopupWindow.setTouchable(touchable);
  }

  private void dispatchJSTouchEvent(MotionEvent event) {
    EventDispatcher eventDispatcher = mReactContext.getNativeModule(UIManagerModule.class)
            .getEventDispatcher();
    mJSTouchDispatcher.handleTouchEvent(event, eventDispatcher);
  }

  @Override
  public void addView(View child, int index) {
    if (this.getChildCount() > 1) {
      throw new JSApplicationIllegalArgumentException(
              "onlyChild must be passed a children with exactly one child"
      );
    }

    mPopupWindowContentView.addView(child, index);
  }
}