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/*
 * Copyright 2013 serso aka se.solovyev
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 * Contact details
 *
 * Email: [email protected]
 * Site:  http://se.solovyev.org
 */

package org.solovyev.android.view;

import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.TextView;

import javax.annotation.Nonnull;

/**
 * User: serso
 * Date: 11/3/12
 * Time: 10:49 PM
 */
public final class AndroidViewUtils {

	private AndroidViewUtils() {
		throw new AssertionError();
	}

	public static boolean drawDrawables(Canvas canvas, @Nonnull TextView textView) {
		final int compoundPaddingLeft = textView.getCompoundPaddingLeft();
		final int compoundPaddingTop = textView.getCompoundPaddingTop();
		final int compoundPaddingRight = textView.getCompoundPaddingRight();
		final int compoundPaddingBottom = textView.getCompoundPaddingBottom();

		final int scrollX = textView.getScrollX();
		final int scrollY = textView.getScrollY();

		final int right = textView.getRight();
		final int left = textView.getLeft();
		final int bottom = textView.getBottom();
		final int top = textView.getTop();

		final Drawable[] drawables = textView.getCompoundDrawables();
		if (drawables != null) {

			int vspace = bottom - top - compoundPaddingBottom - compoundPaddingTop;
			int hspace = right - left - compoundPaddingRight - compoundPaddingLeft;

			Drawable topDr = drawables[1];
			// IMPORTANT: The coordinates computed are also used in invalidateDrawable()
			// Make sure to update invalidateDrawable() when changing this code.
			if (topDr != null) {
				canvas.save();
				canvas.translate(scrollX + compoundPaddingLeft + (hspace - topDr.getBounds().width()) / 2,
						scrollY + textView.getPaddingTop() + vspace / 2);
				topDr.draw(canvas);
				canvas.restore();
				return true;
			}
		}

		return false;
	}

	public static void applyButtonDef(@Nonnull Button button, @Nonnull ButtonDef buttonDef) {
		button.setText(buttonDef.getText());

		final Integer drawableResId = buttonDef.getDrawableResId();
		if (drawableResId != null) {
			button.setPadding(0, 0, 0, 0);

			final Drawable drawable = button.getContext().getResources().getDrawable(drawableResId);
			button.setCompoundDrawablesWithIntrinsicBounds(null, drawable, null, null);
			button.setCompoundDrawablePadding(0);
		}

		applyViewDef(button, buttonDef);
	}

	public static void applyButtonDef(@Nonnull ImageButton imageButton, @Nonnull ButtonDef buttonDef) {
		final Integer drawableResId = buttonDef.getDrawableResId();
		if (drawableResId != null) {
			imageButton.setImageDrawable(imageButton.getContext().getResources().getDrawable(drawableResId));
		}

		applyViewDef(imageButton, buttonDef);
	}

	public static void applyViewDef(@Nonnull View view, @Nonnull ViewDef viewDef) {
		final Integer backgroundResId = viewDef.getBackgroundResId();
		if (backgroundResId != null) {
			view.setBackgroundResource(backgroundResId);
		}

		final String tag = viewDef.getTag();
		if (tag != null) {
			view.setTag(tag);
		}
	}
}