/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * 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.
 */

package com.android.gallery3d.filtershow.filters;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;

import com.android.gallery3d.R;

public class ImageFilterBorder extends ImageFilter {
    private static final float NINEPATCH_ICON_SCALING = 10;
    private static final float BITMAP_ICON_SCALING = 1 / 3.0f;
    Drawable mNinePatch = null;
    private FilterImageBorderRepresentation mParameters = null;

    @Override
    public ImageFilter clone() throws CloneNotSupportedException {
        ImageFilterBorder filter = (ImageFilterBorder) super.clone();
        filter.setDrawable(mNinePatch);
        return filter;
    }

    public ImageFilterBorder() {

    }

    public ImageFilterBorder(Drawable ninePatch) {
        setFilterType(TYPE_BORDER);
        mName = "Border";
        mNinePatch = ninePatch;
    }

    public void useRepresentation(FilterRepresentation representation) {
        FilterImageBorderRepresentation parameters = (FilterImageBorderRepresentation) representation;
        mParameters = parameters;
    }

    public FilterImageBorderRepresentation getParameters() {
        return mParameters;
    }

    public boolean isNil() {
        if (mNinePatch == null) {
            return true;
        }
        return false;
    }

    @Override
    public int getTextId() {
        return R.string.borders;
    }

    @Override
    public boolean showParameterValue() {
        return false;
    }

    @Override
    public boolean showEditingControls() {
        return false;
    }

    @Override
    public boolean showUtilityPanel() {
        return false;
    }

    @Override
    public boolean same(ImageFilter filter) {
        boolean isBorderFilter = super.same(filter);
        if (!isBorderFilter) {
            return false;
        }
        if (!(filter instanceof ImageFilterBorder)) {
            return false;
        }
        ImageFilterBorder borderFilter = (ImageFilterBorder) filter;
        if (mNinePatch != borderFilter.mNinePatch) {
            return false;
        }
        return true;
    }

    public void setDrawable(Drawable ninePatch) {
        // TODO: for now we only use nine patch
        mNinePatch = ninePatch;
    }

    public Bitmap applyHelper(Bitmap bitmap, float scale1, float scale2 ) {
        int w = bitmap.getWidth();
        int h = bitmap.getHeight();
        Rect bounds = new Rect(0, 0, (int) (w * scale1), (int) (h * scale1));
        Canvas canvas = new Canvas(bitmap);
        canvas.scale(scale2, scale2);
        getParameters().getDrawable().setBounds(bounds);
        getParameters().getDrawable().draw(canvas);
        return bitmap;
    }

    @Override
    public Bitmap apply(Bitmap bitmap, float scaleFactor, boolean highQuality) {
        if (getParameters() == null || getParameters().getDrawable() == null) {
            return bitmap;
        }
        float scale2 = scaleFactor * 2.0f;
        float scale1 = 1 / scale2;
        return applyHelper(bitmap, scale1, scale2);
    }

    @Override
    public Bitmap iconApply(Bitmap bitmap, float scaleFactor, boolean highQuality) {
        if (getParameters() == null || getParameters().getDrawable() == null) {
            return bitmap;
        }
        float scale1 = NINEPATCH_ICON_SCALING;
        float scale2 = BITMAP_ICON_SCALING;
        return applyHelper(bitmap, scale1, scale2);
    }
}