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 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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
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package org.openoffice.setup;

import org.openoffice.setup.SetupData.SetupDataProvider;
import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Locale;
import java.util.MissingResourceException;
import java.util.PropertyResourceBundle;
import java.util.ResourceBundle;
import javax.swing.ImageIcon;

public class ResourceManager {
    
    static PropertyResourceBundle stringResourceBundle;
    static PropertyResourceBundle fileNameResourceBundle;
    static HashMap setupFiles = new HashMap();  // required, because it is not possible to set values in fileNameResourceBundle
    
    private ResourceManager() {
    }
    
    static public void checkFileExistence(File htmlDirectory) {

        for (Enumeration e = fileNameResourceBundle.getKeys(); e.hasMoreElements(); ) {
            String key = (String) e.nextElement();            
            String fileName = (String)(fileNameResourceBundle.getObject(key));

            if ( ! fileName.endsWith("html") ) {
                // no check of existence for non-html files
                setupFiles.put(key, fileName);            
                // System.err.println("Using file: " + fileName);
            }

            if ( fileName.endsWith("html") ) {
                boolean fileExists = true;
            
                File file = new File(htmlDirectory, fileName);
                File newFile = null;

                if ( file.exists() ) {
                    setupFiles.put(key, fileName);                
                    // System.err.println("Using file: " + fileName);
                } else {
                    fileExists = false;
                    // try to use english version
                    int pos1 = fileName.lastIndexOf("_");
                
                    if ( pos1 > 0 ) {
                        int pos2 = fileName.lastIndexOf(".");
                        String newFileName = fileName.substring(0, pos1) + fileName.substring(pos2, fileName.length());
                        newFile = new File(htmlDirectory, newFileName);
                        if ( newFile.exists() ) {
                            fileExists = true;
                            setupFiles.put(key, newFileName);                
                            // System.err.println("Using file: " + fileName);
                        } else {
                            // Introducing fallback to a very special simple html page
                            String simplePage = "Excuse.html";
                            File simpleFile = new File(htmlDirectory, simplePage);
                            if ( simpleFile.exists() ) {
                                fileExists = true;
                                setupFiles.put(key, simplePage);
                                // System.err.println("Using file: " + fileName);
                            }                
                        }
                    }
                }
            
                if ( ! fileExists ) {
                    if ( newFile != null ) {
                        System.err.println("ERROR: Neither file \"" + file.getPath() +
                                           "\" nor file \"" + newFile.getPath() + "\" do exist!");
                    } else {
                        System.err.println("ERROR: File \"" + file.getPath() + "\" does not exist!");
                    }
                    System.exit(1);
                }
            }      
        }	
    }
    
    static public String getString(String key) {
        String value = (String)(stringResourceBundle.getObject(key));
        if (value != null && (value.indexOf('$') >= 0)) {
            value = SetupDataProvider.replaceMacros(value);
        }
        return value;
    }

    static public String getFileName(String key) {
        String value = (String)setupFiles.get(key);
        // String value = (String)(fileNameResourceBundle.getObject(key));
        return value;
    }
    
    static public ImageIcon getIcon(String key) {
        
        String name = getFileName(key);
        
        try {
            Class c = Class.forName("org.openoffice.setup.ResourceManager");
            URL url = c.getResource(name);
            if (url != null) {
                return new ImageIcon(url);
            } else {
                System.err.println("Error: file not found: " + name);
            }             
        } catch (ClassNotFoundException e) {
            System.err.println(e);
        }

        return new ImageIcon();
    }

    static public ImageIcon getIconFromPath(File file) {
        
        try {
            URL url = file.toURL();
            if (url != null) {
                return new ImageIcon(url);
            } else {
                System.err.println("Error: file not found: " + file.getPath());
            }             
        } catch (MalformedURLException e) {
            System.err.println(e);
        }

        return new ImageIcon();
    }

    static {
        Locale locale = Locale.getDefault();
        System.err.println("System locale: " + locale );
        try {
            stringResourceBundle = (PropertyResourceBundle) ResourceBundle.getBundle("org.openoffice.setup.setupstrings", locale);
            fileNameResourceBundle = (PropertyResourceBundle) ResourceBundle.getBundle("org.openoffice.setup.setupfiles", locale);
        } catch (MissingResourceException ex) {
            ex.printStackTrace();
            System.exit(1);
        }
    }
}