/*
 * 				Firetweet - Twitter client for Android
 * 
 *  Copyright (C) 2012-2014 Mariotaku Lee <mariotaku.lee@gmail.com>
 * 
 *  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.getlantern.firetweet.view;

import android.annotation.TargetApi;
import android.content.Context;
import android.content.res.ColorStateList;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Color;
import android.graphics.PorterDuff.Mode;
import android.graphics.drawable.ColorDrawable;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.support.v4.view.ViewCompat;
import android.util.AttributeSet;
import android.util.Property;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.ProgressBar;

import org.getlantern.firetweet.R;
import org.getlantern.firetweet.util.ThemeUtils;
import org.getlantern.firetweet.util.accessor.ViewAccessor;
import org.getlantern.firetweet.util.accessor.ViewAccessor.OutlineCompat;
import org.getlantern.firetweet.util.accessor.ViewAccessor.ViewOutlineProviderCompat;
import org.getlantern.firetweet.view.iface.IHomeActionButton;

import me.uucky.colorpicker.internal.EffectViewHelper;

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public class HomeActionButton extends FrameLayout implements IHomeActionButton {

    private static class PressElevationProperty extends Property<View, Float> {
        private final float mElevation;

        public PressElevationProperty(float elevation) {
            super(Float.TYPE, null);
            mElevation = elevation;
        }

        @Override
        public void set(View object, Float value) {
            ViewCompat.setTranslationZ(object, mElevation * value);
        }

        @Override
        public Float get(View object) {
            return ViewCompat.getTranslationZ(object) / mElevation;
        }
    }

    private final EffectViewHelper mHelper;
    private final ImageView mIconView;
    private final ProgressBar mProgressBar;

    public HomeActionButton(final Context context) {
        this(context, null);
    }

    public HomeActionButton(final Context context, final AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public HomeActionButton(final Context context, final AttributeSet attrs, final int defStyle) {
        super(context, attrs, defStyle);
        final Resources resources = context.getResources();
        final float elevation = resources.getDisplayMetrics().density * 4;
        mHelper = new EffectViewHelper(this, new PressElevationProperty(elevation), 200);
        if (isInEditMode()) {
            inflate(context, R.layout.action_item_home_actions, this);
        } else {
            inflate(ThemeUtils.getActionBarContext(context), R.layout.action_item_home_actions, this);
        }
        mIconView = (ImageView) findViewById(android.R.id.icon);
        mProgressBar = (ProgressBar) findViewById(android.R.id.progress);
        ViewAccessor.setOutlineProvider(this, new HomeActionButtonOutlineProvider());
        setClipToOutline(true);
        setButtonColor(Color.WHITE);
    }

    @Override
    public void setButtonColor(int color) {
        ViewAccessor.setBackground(this, new ColorDrawable(color));
    }

    @Override
    public void setIcon(final Bitmap bm) {
        mIconView.setImageBitmap(bm);
    }

    @Override
    public void setIcon(final Drawable drawable) {
        mIconView.setImageDrawable(drawable);
    }

    @Override
    public void setIcon(final int resId) {
        mIconView.setImageResource(resId);
    }

    @Override
    public void setIconColor(int color, Mode mode) {
        mIconView.setColorFilter(color, mode);
        mProgressBar.setIndeterminateTintList(ColorStateList.valueOf(color));
    }

    @Override
    public void setShowProgress(final boolean showProgress) {
        mProgressBar.setVisibility(showProgress ? View.VISIBLE : View.GONE);
        mIconView.setVisibility(showProgress ? View.GONE : View.VISIBLE);
    }

    @Override
    public void setTitle(final CharSequence title) {
        setContentDescription(title);
    }

    @Override
    public void setTitle(final int title) {
        setTitle(getResources().getText(title));
    }

    @Override
    public void setPressed(boolean pressed) {
        super.setPressed(pressed);
        mHelper.setState(pressed);
    }

    private static class HomeActionButtonOutlineProvider extends ViewOutlineProviderCompat {

        @Override
        public void getOutline(View view, OutlineCompat outline) {
            final int width = view.getWidth(), height = view.getHeight();
            final int size = Math.min(width, height);
            final int left = (width - size) / 2, top = (height - size) / 2;
            outline.setOval(left, top, left + size, top + size);
        }
    }


}