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Command line WADL client
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/**
 * Copyright 2015 Santhosh Kumar Tekuri
 *
 * The JLibs authors license 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
 * under the License.
 */

package jlibs.wadl.cli;

import jlibs.core.lang.Ansi;
import jlibs.wadl.cli.commands.Runner;
import jlibs.wadl.cli.completors.WADLCompletor;
import jlibs.wadl.cli.model.Path;
import jline.CandidateListCompletionHandler;
import jline.ConsoleReader;

import java.io.IOException;
import java.net.MalformedURLException;
import java.util.ArrayList;
import java.util.Deque;
import java.util.List;

import static jlibs.core.lang.Ansi.Attribute;
import static jlibs.core.lang.Ansi.Color;

/**
 * @author Santhosh Kumar T
 */
public class WADLTerminal{
    public final ConsoleReader console;
    private final Runner command = new Runner(this);
    private List roots = new ArrayList();

    public WADLTerminal() throws IOException{
        this.console = new ConsoleReader();
    }

    public List getRoots(){
        return roots;
    }
    
    private Path currentPath;

    public Path getCurrentPath(){
        return currentPath;
    }

    public void setCurrentPath(Path currentPath){
        this.currentPath = currentPath;
    }
    
    private static Ansi PROMPT[][] ={
        {
            new Ansi(Attribute.BRIGHT, Color.WHITE, Color.BLUE),
            new Ansi(Attribute.BRIGHT, Color.GREEN, Color.BLUE)
        },
        {
            new Ansi(Attribute.BRIGHT, Color.WHITE, Color.RED),
            new Ansi(Attribute.BRIGHT, Color.GREEN, Color.RED)
        }
    };
    public String getPrompt(int index){
        if(currentPath==null)
            return "[?]";
        else{
            StringBuilder buff = new StringBuilder();
            buff.append(PROMPT[index][0].colorize("["));

            Deque stack = currentPath.getStack();
            boolean first = true;
            Path path;
            while(!stack.isEmpty()){
                if(first)
                    first = false;
                else
                    buff.append(PROMPT[index][0].colorize("/"));
                path = stack.pop();

                if(path.value==null)
                    buff.append(PROMPT[index][0].colorize(path.name));
                else
                    buff.append(PROMPT[index][1].colorize(path.value));
            }
            buff.append(PROMPT[index][0].colorize("]"));
            return buff.toString();
        }
    }
    
    public String getURL() throws MalformedURLException{
        Path path = currentPath;
        StringBuilder buff = new StringBuilder();
        Deque stack = path.getStack();
        boolean first = true;
        while(!stack.isEmpty()){
            if(first)
                first = false;
            else
                buff.append('/');
            path = stack.pop();
            buff.append(path.resolve());
        }
        return buff.toString();
    }

    public void start() throws IOException{
        WADLCompletor completor = new WADLCompletor(this);
        console.addCompletor(completor);

        CandidateListCompletionHandler completionHandler = new CandidateListCompletionHandler();
        console.setCompletionHandler(completionHandler);

        String line;
        int promptIndex = 0;
        while((line=console.readLine(getPrompt(promptIndex)+" "))!=null){
            line = line.trim();
            if(line.length()>0){
                if(line.equals("exit") || line.equals("quit"))
                    return;
                try{
                    promptIndex = command.run(line) ? 0 : 1;
                }catch(Exception ex){
                    ex.printStackTrace();
                    promptIndex = 1;
                }
            }
        }
    }

    public static void main(String[] args) throws Exception{
        WADLTerminal terminal = new WADLTerminal();
        for(String arg: args)
            terminal.command.run("import "+arg);
        terminal.start();
    }
    
    private static void print(Path path){
        if(path.resource!=null)
            System.out.println(path);
        for(Path child: path.children)
            print(child);
    }
}