/*
 * Copyright (C) 2008 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.systemui.statusbar;

import android.service.notification.StatusBarNotification;
import android.os.IBinder;
import android.view.View;
import android.widget.ImageView;

import com.android.systemui.R;

import java.util.Comparator;
import java.util.ArrayList;

/**
 * The list of currently displaying notifications.
 */
public class NotificationData {
    public static final class Entry {
        public IBinder key;
        public StatusBarNotification notification;
        public StatusBarIconView icon;
        public View row; // the outer expanded view
        public View content; // takes the click events and sends the PendingIntent
        public View expanded; // the inflated RemoteViews
        public ImageView largeIcon;
        protected View expandedLarge;
        public Entry() {}
        public Entry(IBinder key, StatusBarNotification n, StatusBarIconView ic) {
            this.key = key;
            this.notification = n;
            this.icon = ic;
        }
        public void setLargeView(View expandedLarge) {
            this.expandedLarge = expandedLarge;
            writeBooleanTag(row, R.id.expandable_tag, expandedLarge != null);
        }
        public View getLargeView() {
            return expandedLarge;
        }
        /**
         * Return whether the entry can be expanded.
         */
        public boolean expandable() {
            return NotificationData.getIsExpandable(row);
        }
        /**
         * Return whether the entry has been manually expanded by the user.
         */
        public boolean userExpanded() {
            return NotificationData.getUserExpanded(row);
        }
        /**
         * Set the flag indicating that this was manually expanded by the user.
         */
        public boolean setUserExpanded(boolean userExpanded) {
            return NotificationData.setUserExpanded(row, userExpanded);
        }
        /**
         * Return whether the entry is being touched by the user.
         */
        public boolean userLocked() {
            return NotificationData.getUserLocked(row);
        }
        /**
         * Set the flag indicating that this is being touched by the user.
         */
        public boolean setUserLocked(boolean userLocked) {
            return NotificationData.setUserLocked(row, userLocked);
        }
    }
    private final ArrayList<Entry> mEntries = new ArrayList<Entry>();
    private final Comparator<Entry> mEntryCmp = new Comparator<Entry>() {
        // sort first by score, then by when
        public int compare(Entry a, Entry b) {
            final StatusBarNotification na = a.notification;
            final StatusBarNotification nb = b.notification;
            int d = na.getScore() - nb.getScore();
            return (d != 0)
                ? d
                : (int)(na.getNotification().when - nb.getNotification().when);
        }
    };

    public int size() {
        return mEntries.size();
    }

    public Entry get(int i) {
        return mEntries.get(i);
    }

    public Entry findByKey(IBinder key) {
        for (Entry e : mEntries) {
            if (e.key == key) {
                return e;
            }
        }
        return null;
    }

    public int add(Entry entry) {
        int i;
        int N = mEntries.size();
        for (i=0; i<N; i++) {
            if (mEntryCmp.compare(mEntries.get(i), entry) > 0) {
                break;
            }
        }
        mEntries.add(i, entry);
        return i;
    }

    public int add(IBinder key, StatusBarNotification notification, View row, View content,
            View expanded, StatusBarIconView icon) {
        Entry entry = new Entry();
        entry.key = key;
        entry.notification = notification;
        entry.row = row;
        entry.content = content;
        entry.expanded = expanded;
        entry.icon = icon;
        entry.largeIcon = null; // TODO add support for large icons
        return add(entry);
    }

    public Entry remove(IBinder key) {
        Entry e = findByKey(key);
        if (e != null) {
            mEntries.remove(e);
        }
        return e;
    }

    /**
     * Return whether there are any visible items (i.e. items without an error).
     */
    public boolean hasVisibleItems() {
        for (Entry e : mEntries) {
            if (e.expanded != null) { // the view successfully inflated
                return true;
            }
        }
        return false;
    }

    /**
     * Return whether there are any clearable items (that aren't errors).
     */
    public boolean hasClearableItems() {
        for (Entry e : mEntries) {
            if (e.expanded != null) { // the view successfully inflated
                if (e.notification.isClearable()) {
                    return true;
                }
            }
        }
        return false;
    }

    protected static boolean readBooleanTag(View view, int id)  {
        if (view != null) {
            Object value = view.getTag(id);
            return value != null && value instanceof Boolean && ((Boolean) value).booleanValue();
        }
        return false;
    }

    protected static boolean writeBooleanTag(View view, int id, boolean value)  {
        if (view != null) {
            view.setTag(id, Boolean.valueOf(value));
            return value;
        }
        return false;
    }

    /**
     * Return whether the entry can be expanded.
     */
    public static boolean getIsExpandable(View row) {
        return readBooleanTag(row, R.id.expandable_tag);
    }

    /**
     * Return whether the entry has been manually expanded by the user.
     */
    public static boolean getUserExpanded(View row) {
        return readBooleanTag(row, R.id.user_expanded_tag);
    }

    /**
     * Set whether the entry has been manually expanded by the user.
     */
    public static boolean setUserExpanded(View row, boolean userExpanded) {
        return writeBooleanTag(row, R.id.user_expanded_tag, userExpanded);
    }

    /**
     * Return whether the entry is being touched by the user.
     */
    public static boolean getUserLocked(View row) {
        return readBooleanTag(row, R.id.user_lock_tag);
    }

    /**
     * Set whether the entry is being touched by the user.
     */
    public static boolean setUserLocked(View row, boolean userLocked) {
        return writeBooleanTag(row, R.id.user_lock_tag, userLocked);
    }
}