/*
 * 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.presets;

import android.graphics.Bitmap;
import android.util.Log;

import com.android.gallery3d.filtershow.ImageStateAdapter;
import com.android.gallery3d.filtershow.cache.ImageLoader;
import com.android.gallery3d.filtershow.filters.FilterRepresentation;
import com.android.gallery3d.filtershow.filters.FiltersManager;
import com.android.gallery3d.filtershow.filters.ImageFilter;
import com.android.gallery3d.filtershow.imageshow.GeometryMetadata;
import com.android.gallery3d.filtershow.imageshow.MasterImage;

import java.util.Vector;

public class ImagePreset {

    private static final String LOGTAG = "ImagePreset";

    private FilterRepresentation mBorder = null;
    private float mScaleFactor = 1.0f;
    private boolean mIsHighQuality = false;
    private ImageLoader mImageLoader = null;

    private Vector<FilterRepresentation> mFilters = new Vector<FilterRepresentation>();

    protected String mName = "Original";
    private String mHistoryName = "Original";
    protected boolean mIsFxPreset = false;

    private boolean mDoApplyGeometry = true;
    private boolean mDoApplyFilters = true;

    public final GeometryMetadata mGeoData = new GeometryMetadata();

    public ImagePreset() {
        setup();
    }

    public ImagePreset(String historyName) {
        setHistoryName(historyName);
        setup();
    }

    public ImagePreset(ImagePreset source, String historyName) {
        this(source);
        if (historyName != null) {
            setHistoryName(historyName);
        }
    }

    public ImagePreset(ImagePreset source) {
        try {
            if (source.mBorder != null) {
                mBorder = source.mBorder.clone();
            }
            for (int i = 0; i < source.mFilters.size(); i++) {
                FilterRepresentation representation = source.mFilters.elementAt(i).clone();
                representation.setImagePreset(this);
                addFilter(representation);
            }
        } catch (java.lang.CloneNotSupportedException e) {
            Log.v(LOGTAG, "Exception trying to clone: " + e);
        }
        mName = source.name();
        mHistoryName = source.name();
        mIsFxPreset = source.isFx();
        mImageLoader = source.getImageLoader();

        mGeoData.set(source.mGeoData);
    }

    public FilterRepresentation getFilterRepresentation(int position) {
        FilterRepresentation representation = null;
        try {
            representation = mFilters.elementAt(position).clone();
        } catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        return representation;
    }

    public int getPositionForRepresentation(FilterRepresentation representation) {
        for (int i = 0; i < mFilters.size(); i++) {
            if (mFilters.elementAt(i).getFilterClass() == representation.getFilterClass()) {
                return i;
            }
        }
        return -1;
    }

    public FilterRepresentation getFilterRepresentationCopyFrom(FilterRepresentation filterRepresentation) {
        // TODO: add concept of position in the filters (to allow multiple instances)
        if (filterRepresentation == null) {
            return null;
        }
        int position = getPositionForRepresentation(filterRepresentation);
        if (position == -1) {
            return null;
        }
        FilterRepresentation representation = null;
        try {
            representation = mFilters.elementAt(position).clone();
        } catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        return representation;
    }

    public void updateFilterRepresentation(FilterRepresentation representation) {
        synchronized (mFilters) {
            int position = getPositionForRepresentation(representation);
            FilterRepresentation old = mFilters.elementAt(position);
            old.useParametersFrom(representation);
        }
        MasterImage.getImage().invalidatePreview();
    }

    public void setDoApplyGeometry(boolean value) {
        mDoApplyGeometry = value;
    }

    public void setDoApplyFilters(boolean value) {
        mDoApplyFilters = value;
    }

    public boolean getDoApplyFilters() {
        return mDoApplyFilters;
    }

    public synchronized GeometryMetadata getGeometry() {
        return mGeoData;
    }

    public boolean hasModifications() {
        if (mBorder != null && !mBorder.isNil()) {
            return true;
        }
        if (mGeoData.hasModifications()) {
            return true;
        }
        for (int i = 0; i < mFilters.size(); i++) {
            FilterRepresentation filter = mFilters.elementAt(i);
            if (!filter.isNil()) {
                return true;
            }
        }
        return false;
    }

    public boolean isPanoramaSafe() {
        if (mBorder != null && !mBorder.isNil()) {
            return false;
        }
        if (mGeoData.hasModifications()) {
            return false;
        }
        for (FilterRepresentation representation : mFilters) {
            if (representation.getPriority() == ImageFilter.TYPE_VIGNETTE
                && !representation.isNil()) {
                return false;
            }
            if (representation.getPriority() == ImageFilter.TYPE_TINYPLANET
                && !representation.isNil()) {
                return false;
            }
        }
        return true;
    }

    public synchronized void setGeometry(GeometryMetadata m) {
        mGeoData.set(m);
    }

    private void setBorder(FilterRepresentation filter) {
        mBorder = filter;
    }

    public boolean isFx() {
        return mIsFxPreset;
    }

    public void setIsFx(boolean value) {
        mIsFxPreset = value;
    }

    public void setName(String name) {
        mName = name;
        mHistoryName = name;
    }

    public void setHistoryName(String name) {
        mHistoryName = name;
    }

    public ImageLoader getImageLoader() {
        return mImageLoader;
    }

    public void setImageLoader(ImageLoader mImageLoader) {
        this.mImageLoader = mImageLoader;
    }

    public boolean equals(ImagePreset preset) {
        if (!same(preset)) {
            return false;
        }
        if (mDoApplyFilters && preset.mDoApplyFilters) {
            for (int i = 0; i < preset.mFilters.size(); i++) {
                FilterRepresentation a = preset.mFilters.elementAt(i);
                FilterRepresentation b = mFilters.elementAt(i);
                if (!a.equals(b)) {
                    return false;
                }
            }
        }
        return true;
    }

    public boolean same(ImagePreset preset) {
        if (preset == null) {
            return false;
        }

        if (preset.mFilters.size() != mFilters.size()) {
            return false;
        }

        if (!mName.equalsIgnoreCase(preset.name())) {
            return false;
        }

        if (mDoApplyGeometry != preset.mDoApplyGeometry) {
            return false;
        }

        if (mDoApplyGeometry && !mGeoData.equals(preset.mGeoData)) {
            return false;
        }

        if (mDoApplyGeometry && mBorder != preset.mBorder) {
            return false;
        }

        if (mBorder != null && !mBorder.equals(preset.mBorder)) {
            return false;
        }

        if (mDoApplyFilters != preset.mDoApplyFilters) {
            if (mFilters.size() > 0 || preset.mFilters.size() > 0) {
                return false;
            }
        }

        if (mDoApplyFilters && preset.mDoApplyFilters) {
            for (int i = 0; i < preset.mFilters.size(); i++) {
                FilterRepresentation a = preset.mFilters.elementAt(i);
                FilterRepresentation b = mFilters.elementAt(i);
                if (!a.same(b)) {
                    return false;
                }
            }
        }

        return true;
    }

    public int similarUpTo(ImagePreset preset) {
        if (!mGeoData.equals(preset.mGeoData)) {
            return -1;
        }

        for (int i = 0; i < preset.mFilters.size(); i++) {
            FilterRepresentation a = preset.mFilters.elementAt(i);
            if (i < mFilters.size()) {
                FilterRepresentation b = mFilters.elementAt(i);
                if (!a.same(b)) {
                    return i;
                }
                if (!a.equals(b)) {
                    return i;
                }
            } else {
                return i;
            }
        }
        return preset.mFilters.size();
    }

    public String name() {
        return mName;
    }

    public String historyName() {
        return mHistoryName;
    }

    public void showFilters() {
        Log.v(LOGTAG, "\\\\\\ showFilters -- " + mFilters.size() + " filters");
        int n = 0;
        for (FilterRepresentation representation : mFilters) {
            Log.v(LOGTAG, " filter " + n + " : " + representation.toString());
            n++;
        }
        Log.v(LOGTAG, "/// showFilters -- " + mFilters.size() + " filters");
    }

    public void addFilter(FilterRepresentation representation) {
        Log.v(LOGTAG, "*** Add Filter *** " + representation);
        if (representation.getPriority() == ImageFilter.TYPE_BORDER) {
            setHistoryName(representation.getName());
            setBorder(representation);
        } else if (representation.getPriority() == ImageFilter.TYPE_FX) {
            boolean found = false;
            for (int i = 0; i < mFilters.size(); i++) {
                int type = mFilters.elementAt(i).getPriority();
                if (found) {
                    if (type != ImageFilter.TYPE_VIGNETTE) {
                        mFilters.remove(i);
                        continue;
                    }
                }
                if (type == ImageFilter.TYPE_FX) {
                    mFilters.remove(i);
                    mFilters.add(i, representation);
                    setHistoryName(representation.getName());
                    found = true;
                }
            }
            if (!found) {
                mFilters.add(representation);
                setHistoryName(representation.getName());
            }
        } else {
            mFilters.add(representation);
            setHistoryName(representation.getName());
        }
        representation.setImagePreset(this);
    }

    public FilterRepresentation getRepresentation(FilterRepresentation filterRepresentation) {
        for (int i = 0; i < mFilters.size(); i++) {
            FilterRepresentation representation = mFilters.elementAt(i);
            if (representation.getFilterClass() == filterRepresentation.getFilterClass()) {
                return representation;
            }
        }
        if (mBorder != null && mBorder.getFilterClass() == filterRepresentation.getFilterClass()) {
            return mBorder;
        }
        return null;
    }

    public void setup() {
        // do nothing here
    }

    public Bitmap apply(Bitmap original) {
        Bitmap bitmap = original;
        bitmap = applyFilters(bitmap, -1, -1);
        return applyBorder(bitmap);
    }

    public Bitmap applyGeometry(Bitmap bitmap) {
        // Apply any transform -- 90 rotate, flip, straighten, crop
        // Returns a new bitmap.
        return mGeoData.apply(bitmap, mScaleFactor, mIsHighQuality);
    }

    public Bitmap applyBorder(Bitmap bitmap) {
        if (mBorder != null && mDoApplyGeometry) {
            ImageFilter filter = FiltersManager.getManager().getFilterForRepresentation(mBorder);
            filter.useRepresentation(mBorder);
            bitmap = filter.apply(bitmap, mScaleFactor, mIsHighQuality);
        }
        return bitmap;
    }

    public Bitmap applyFilters(Bitmap bitmap, int from, int to) {

        if (mDoApplyFilters) {
            if (from < 0) {
                from = 0;
            }
            if (to == -1) {
                to = mFilters.size();
            }
            for (int i = from; i < to; i++) {
                FilterRepresentation representation = null;
                synchronized (mFilters) {
                    representation = mFilters.elementAt(i);
                }
                ImageFilter filter = FiltersManager.getManager().getFilterForRepresentation(representation);
                filter.useRepresentation(representation);
                bitmap = filter.apply(bitmap, mScaleFactor, mIsHighQuality);
            }
        }

        return bitmap;
    }

    public void fillImageStateAdapter(ImageStateAdapter imageStateAdapter) {
        if (imageStateAdapter == null) {
            return;
        }
        imageStateAdapter.clear();
        // TODO: re-enable the state panel
        // imageStateAdapter.addAll(mFilters);
        imageStateAdapter.notifyDataSetChanged();
    }

    public float getScaleFactor() {
        return mScaleFactor;
    }

    public boolean isHighQuality() {
        return mIsHighQuality;
    }

    public void setIsHighQuality(boolean value) {
        mIsHighQuality = value;
    }

    public void setScaleFactor(float value) {
        mScaleFactor = value;
    }
}