/*
 * Copyright (c) 2010-2019 Belledonne Communications SARL.
 *
 * This file is part of linphone-android
 * (see https://www.linphone.org).
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package org.linphone.call.views;

import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.widget.LinearLayout;
import androidx.annotation.Nullable;
import org.linphone.R;

public class CallIncomingAnswerButton extends LinearLayout
        implements View.OnClickListener, View.OnTouchListener {
    private LinearLayout mRoot;
    private boolean mUseSliderMode = false;
    private CallIncomingButtonListener mListener;
    private View mDeclineButton;

    private int mScreenWidth;
    private boolean mBegin;
    private float mAnswerX, mOldSize;

    public CallIncomingAnswerButton(Context context) {
        super(context);
        init();
    }

    public CallIncomingAnswerButton(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public CallIncomingAnswerButton(
            Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    public void setSliderMode(boolean enabled) {
        mUseSliderMode = enabled;
        findViewById(R.id.acceptUnlock).setVisibility(enabled ? VISIBLE : GONE);
    }

    public void setListener(CallIncomingButtonListener listener) {
        mListener = listener;
    }

    public void setDeclineButton(View decline) {
        mDeclineButton = decline;
    }

    private void init() {
        inflate(getContext(), R.layout.call_incoming_answer_button, this);
        mRoot = findViewById(R.id.root);
        mRoot.setOnClickListener(this);
        mRoot.setOnTouchListener(this);
        mScreenWidth = getResources().getDisplayMetrics().widthPixels;
    }

    @Override
    public void onClick(View v) {
        if (!mUseSliderMode) {
            performClick();
        }
    }

    @Override
    public boolean onTouch(View view, MotionEvent motionEvent) {
        if (mUseSliderMode) {
            float curX;
            switch (motionEvent.getAction()) {
                case MotionEvent.ACTION_DOWN:
                    mDeclineButton.setVisibility(View.GONE);
                    mAnswerX = motionEvent.getX() - mRoot.getWidth();
                    mBegin = true;
                    mOldSize = 0;
                    break;
                case MotionEvent.ACTION_MOVE:
                    curX = motionEvent.getX() - mRoot.getWidth();
                    view.scrollBy((int) (mAnswerX - curX), view.getScrollY());
                    mOldSize -= mAnswerX - curX;
                    mAnswerX = curX;
                    if (mOldSize < -25) mBegin = false;
                    if (curX < (mScreenWidth / 4) - mRoot.getWidth() && !mBegin) {
                        performClick();
                        return true;
                    }
                    break;
                case MotionEvent.ACTION_UP:
                    mDeclineButton.setVisibility(View.VISIBLE);
                    view.scrollTo(0, view.getScrollY());
                    break;
            }
            return true;
        }
        return false;
    }

    @Override
    public boolean performClick() {
        super.performClick();
        if (mListener != null) {
            mListener.onAction();
        }
        return true;
    }
}