package edu.jlu.fuliang.action;

import java.io.FileOutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import javax.servlet.ServletRequest;

import org.apache.log4j.Logger;
import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

import edu.jlu.fuliang.Service.SongManageService;
import edu.jlu.fuliang.domain.CompositeSinger;
import edu.jlu.fuliang.domain.Singer;
import edu.jlu.fuliang.domain.SingleSinger;
import edu.jlu.fuliang.domain.Song;

public class PlaySongAction extends ActionSupport{
	private Long[] songIds;
	private String songListFileName="";
	private SongManageService songManageService;
	private String localAddr;
	private Map<Song, Set<SingleSinger>> songSingerMap = new HashMap<Song, Set<SingleSinger>>();
	private Logger logger = Logger.getLogger(PlaySongAction.class);
	
	public String execute()throws Exception{
		
		Song[] songs = new Song[songIds.length];
		for(int i = 0; i < songIds.length; i++){
			songListFileName += songIds[i] + "_";
			songs[i] = songManageService.getSongById(songIds[i]);
		}
		generatePlayListFile(songs);
		generateSongSingerMap(songs);
		return SUCCESS;
	}

	private void generatePlayListFile(Song[] songs)throws Exception{
		ServletRequest request = ServletActionContext.getRequest();
		localAddr = "http://" + request.getLocalAddr() + ":8080" + "/Music";
		songListFileName += ".m3u";
		String songListLocation = request.getRealPath("/upload") + "/" + songListFileName;
		PrintWriter out = new PrintWriter(new OutputStreamWriter(new FileOutputStream(songListLocation)));

		for(int i = 0; i < songIds.length; i++){
			String tempLocation = songs[i].getLocation();
			String songFileName = tempLocation.substring(tempLocation.lastIndexOf("/") + 1);
			out.println(songFileName);
		}
		out.close();
	}
	
	private void generateSongSingerMap(Song[] songs){
		Set<SingleSinger> singers = new HashSet<SingleSinger>();
		Singer singer;
		for(int i = 0; i < songs.length; i++){
			singers = new HashSet<SingleSinger>();
			singer = songs[i].getSinger();
			
			if (singer instanceof SingleSinger) {
				singers.add((SingleSinger) singer);
				logger.info("**********************************add singleSinger " + singer.getRegion());
			} else if (singer instanceof CompositeSinger) {
				CompositeSinger tempSinger = (CompositeSinger) singer;
				singers = tempSinger.getSingleSingers();
				logger.info("***********************************singers Size " + singers.size() );
			}
			songSingerMap.put(songs[i], singers);
		}
	}
	
	public Map<Song, Set<SingleSinger>> getSongSingerMap() {
		return songSingerMap;
	}


	public void setSongSingerMap(Map<Song, Set<SingleSinger>> songSingerMap) {
		this.songSingerMap = songSingerMap;
	}


	public void setSongManageService(SongManageService songManageService) {
		this.songManageService = songManageService;
	}

	public String getLocalAddr() {
		return localAddr;
	}

	public void setLocalAddr(String localAddr) {
		this.localAddr = localAddr;
	}
    
	public Long[] getSongIds() {
		return songIds;
	}

	public void setSongIds(Long[] songIds) {
		this.songIds = songIds;
	}

	public String getSongListFileName() {
		return songListFileName;
	}

	public void setSongListFileName(String songListFileName) {
		this.songListFileName = songListFileName;
	}
}