// $Id$
/*
 * WorldEditLibrary
 * Copyright (C) 2010 sk89q <http://www.sk89q.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

package com.sk89q.worldedit.dev;

import java.io.*;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
import com.sk89q.minecraft.util.commands.Command;
import com.sk89q.minecraft.util.commands.CommandPermissions;
import com.sk89q.util.StringUtil;

public class DocumentationPrinter {
    public static void main(String[] args) throws IOException {
        File commandsDir = new File(args[0]);
        
        List<Class<?>> commandClasses = getCommandClasses(commandsDir);

        System.out.println("Writing permissions wiki table...");
        writePermissionsWikiTable(commandClasses);
        System.out.println("Writing Bukkit plugin.yml...");
        writeBukkitYAML(commandClasses);

        System.out.println("Done!");
    }
    
    private static List<Class<?>> getCommandClasses(File dir) {
        List<Class<?>> classes = new ArrayList<Class<?>>();
        
        for (File f : dir.listFiles()) {
            if (!f.getName().matches("^.*\\.java$")) {
                continue;
            }
            
            String className = "com.sk89q.worldedit.commands."
                + f.getName().substring(0, f.getName().lastIndexOf("."));
            
            Class<?> cls;
            try {
                cls = Class.forName(className, true,
                        Thread.currentThread().getContextClassLoader());
            } catch (ClassNotFoundException e) {
                continue;
            }
            
            classes.add(cls);
        }
        
        return classes;
    }   
    
    private static void writePermissionsWikiTable(List<Class<?>> commandClasses)
            throws IOException {
        FileOutputStream stream = null;
        try {
            stream = new FileOutputStream("wiki_permissions.txt");
            PrintStream print = new PrintStream(stream);
            _writePermissionsWikiTable(print, commandClasses);
        } finally {
            if (stream != null) {
                stream.close();
            }
        }
    }
    
    private static void _writePermissionsWikiTable(PrintStream stream,
            List<Class<?>> commandClasses) {
        
        for (Class<?> cls : commandClasses) {
            for (Method method : cls.getMethods()) {
                if (!method.isAnnotationPresent(Command.class)) {
                    continue;
                }
    
                Command cmd = method.getAnnotation(Command.class);
    
                stream.println("|-");
                stream.print("| /" + cmd.aliases()[0]);
                stream.print(" || ");
    
                if (method.isAnnotationPresent(CommandPermissions.class)) {
                    CommandPermissions perms =
                        method.getAnnotation(CommandPermissions.class);
                    
                    String[] permKeys = perms.value();
                    for (int i = 0; i < permKeys.length; i++) {
                        if (i > 0) {
                            stream.print(", ");
                        }
                        stream.print(permKeys[i]);
                    }
                }
    
                stream.println();
            }
        }
    }
    
    private static void writeBukkitYAML(List<Class<?>> commandClasses)
            throws IOException {
        FileOutputStream stream = null;
        try {
            stream = new FileOutputStream("plugin.yml");
            PrintStream print = new PrintStream(stream);
            _writeBukkitYAML(print, commandClasses);
        } finally {
            if (stream != null) {
                stream.close();
            }
        }
    }
    
    private static void _writeBukkitYAML(PrintStream stream,
            List<Class<?>> commandClasses) {

        stream.println("name: WorldEdit");
        stream.println("main: com.sk89q.worldedit.bukkit.WorldEditPlugin");
        stream.println("version: \"WEVERSIONMACRO\"");
        stream.println("commands:");
        
        for (Class<?> cls : commandClasses) {
            for (Method method : cls.getMethods()) {
                if (!method.isAnnotationPresent(Command.class)) {
                    continue;
                }
    
                Command cmd = method.getAnnotation(Command.class);

                stream.println("    " + cmd.aliases()[0] + ":");
                stream.println("        description: " + cmd.desc());
                stream.println("        usage: /<command> "
                        + (cmd.flags().length() > 0 ? "[-" + cmd.flags() + "] " : "")
                        + cmd.usage());
                if (cmd.aliases().length > 1) {
                    stream.println("        aliases: ["
                            + StringUtil.joinQuotedString(cmd.aliases(), ", ", 1, "'")
                            + "]");
                }
            }
        }
    }
}