/* 
 * Copyright 2015 Adobe.
 *
 * 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.adobe.ags.curly.model;

import com.adobe.ags.curly.xml.Action;
import com.adobe.ags.curly.xml.Actions;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import java.util.TreeSet;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
import javax.xml.bind.JAXB;

public class ActionUtils {

    private static final Pattern VARIABLE_PATTERN = Pattern.compile("\\$\\{(.*?)\\}");

    public static Set<String> getVariableNames(Action action) {
        Set<String> names = new TreeSet();
        if (action.getCommand() != null && !action.getCommand().isEmpty()) {
            Matcher matches = VARIABLE_PATTERN.matcher(action.getCommand());
            while (matches.find()) {
                String rawVariableName = matches.group(1);
                String variableName = rawVariableName.contains("|")
                        ? rawVariableName.substring(0, rawVariableName.indexOf('|'))
                        : rawVariableName;
                names.add(variableName);
            }
        }
        return names;
    }

    public static Map<String, String> getVariablesWithDefaults(Action action) {
        Map<String, String> variableDefaults = new TreeMap<>();
        if (action.getCommand() != null && !action.getCommand().isEmpty()) {
            Matcher matches = VARIABLE_PATTERN.matcher(action.getCommand());
            while (matches.find()) {
                String rawVariableName = matches.group(1);
                String variableName = rawVariableName.contains("|")
                        ? rawVariableName.substring(0, rawVariableName.indexOf('|'))
                        : rawVariableName;
                String variableValue = rawVariableName.contains("|")
                        ? rawVariableName.substring(rawVariableName.indexOf('|') + 1)
                        : null;
                variableDefaults.put(variableName, variableValue);
            }
        }
        return variableDefaults;
    }

    public static List<Action> readFromFile(File sourceFile) {
        Actions parsedActions = JAXB.unmarshal(sourceFile, Actions.class);
        return parsedActions.getAction();
    }

    public static void saveToFile(File targetFile, List<Action> actions) {
        Actions out = new Actions();
        out.getAction().addAll(actions);
        JAXB.marshal(out, targetFile);
    }
    
    public static List<Action> getFavoriteList() {
        if (favorites == null) {
            File favoritesFile = getFavoritesFile();
            if (!favoritesFile.exists()) {
                favorites = new ArrayList<>();
            } else {
                favorites = readFromFile(favoritesFile);
            }
        }
        return favorites;
    }    

    public static boolean isFavorite(Action item) {
        return isFavorite(item.getName());
    }

    public static boolean isFavorite(String name) {
        return name != null
                && !name.isEmpty()
                && getFavoriteList().stream().anyMatch(action -> action.getName().equalsIgnoreCase(name));
    }

    public static void addFavorite(Action item) {
        removeFavorite(item.getName(), false);
        favorites.add(item);
        persistFavorites();
    }

    public static void removeFavorite(String name) {
        removeFavorite(name, true);
    }

    private static List<Action> favorites;

    private static void persistFavorites() {
        if (favorites != null) {
            saveToFile(getFavoritesFile(), favorites);
        }
    }

    private static File getFavoritesFile() {
        return new File(System.getProperty("user.dir"), ".curly_favorites.xml");
    }

    private static void removeFavorite(String name, boolean persist) {
        getFavoriteList();
        favorites = favorites.stream().filter(action -> !action.getName().equalsIgnoreCase(name)).collect(Collectors.toList());
        if (persist) {
            persistFavorites();
        }
    }
}