/**
 *
 */
package org.nativescript.widgets;

import android.content.Context;
import android.view.View;
import android.util.AttributeSet;

/**
 * @author hhristov
 *
 */
public class AbsoluteLayout extends LayoutBase {

	public AbsoluteLayout(Context context) {
		this(context, null);
	}
	public AbsoluteLayout(Context context, AttributeSet attrs) {
		this(context, attrs, 0);
	}
	public AbsoluteLayout(Context context, AttributeSet attrs, int defStyleAttr) {
		super(context, attrs, defStyleAttr);
	}

	@Override
	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
		CommonLayoutParams.adjustChildrenLayoutParams(this, widthMeasureSpec, heightMeasureSpec);

		int measureWidth = 0;
		int measureHeight = 0;
		int childMeasureSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);

		for (int i = 0, count = this.getChildCount(); i < count; i++) {
			View child = this.getChildAt(i);
			if (child.getVisibility() == View.GONE) {
				continue;
			}

			CommonLayoutParams.measureChild(child, childMeasureSpec, childMeasureSpec);
			final int childMeasuredWidth = CommonLayoutParams.getDesiredWidth(child);
			final int childMeasuredHeight = CommonLayoutParams.getDesiredHeight(child);

			CommonLayoutParams childLayoutParams = (CommonLayoutParams) child.getLayoutParams();
			measureWidth = Math.max(measureWidth, childLayoutParams.left + childMeasuredWidth);
			measureHeight = Math.max(measureHeight, childLayoutParams.top + childMeasuredHeight);
		}

		// Add in our padding
		measureWidth += this.getPaddingLeft() + this.getPaddingRight();
		measureHeight += this.getPaddingTop() + this.getPaddingBottom();

		// Check against our minimum height
		measureWidth = Math.max(measureWidth, this.getSuggestedMinimumWidth());
		measureHeight = Math.max(measureHeight, this.getSuggestedMinimumHeight());

		int widthSizeAndState = resolveSizeAndState(measureWidth, widthMeasureSpec, 0);
		int heightSizeAndState = resolveSizeAndState(measureHeight, heightMeasureSpec, 0);

		this.setMeasuredDimension(widthSizeAndState, heightSizeAndState);
	}

	@Override
	protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
		int leftPadding = this.getPaddingLeft();
		int topPadding = this.getPaddingTop();

		for (int i = 0, count = this.getChildCount(); i < count; i++) {
			View child = this.getChildAt(i);
			if (child.getVisibility() == View.GONE) {
				continue;
			}

			CommonLayoutParams childLayoutParams = (CommonLayoutParams) child.getLayoutParams();
			int childWidth = child.getMeasuredWidth();
			int childHeight = child.getMeasuredHeight();

			int childLeft = leftPadding + childLayoutParams.left;
			int childTop = topPadding + childLayoutParams.top;
			int childRight = childLeft + childWidth + childLayoutParams.leftMargin + childLayoutParams.rightMargin;
			int childBottom = childTop + childHeight + childLayoutParams.topMargin + childLayoutParams.bottomMargin;

			CommonLayoutParams.layoutChild(child, childLeft, childTop, childRight, childBottom);
		}

		CommonLayoutParams.restoreOriginalParams(this);
	}
}