package com.routon.utils;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import android.util.Log;

/**
 * parse lrc file tool
 * eg：
 * utilLrc lrc = new utilLrc("/sdcard/test.lrc");
 * get song name : String title = lrc.getTitle();
 * get performer name : String artist = lrc.getArtist();
 * get album name: String album = lrc.getAlbum();
 * get lrcmaker name: String lrcMaker = lrc.getLrcMaker();
 * get song list: List<Statement> list = lrc.getLrcList();
 * 
 * @author xuweilin
 *
 */
public class utilLrc {
	private static String TAG = "utilLrc";
	public class Statement {
		private double time  = 0.0;		//time, 0.01s
		private String lyric = "";		//song word
		/*
		 * get time
		 */
		public double getTime() {
			return time;
		}
		/*
		 * set time
		 */
		public void setTime(double time) {
			this.time = time;
		}
		/*
		 * set time.format:mm:ss.ms
		 */
		public void setTime(String time) {
			String str[] = time.split(":|\\.");
			this.time = Integer.parseInt(str[0])*60+Integer.parseInt(str[1])+Integer.parseInt(str[2])*0.01;
		}
		/*
		 * get lrc word
		 */
		public String getLyric() {
			return lyric;
		}
		/*
		 * set lrc word
		 */
		public void setLyric(String lyric) {
			this.lyric = lyric;
		}
	}
	private BufferedReader bufferReader = null;					
	private String title = "";										
	private String artist = "";									
	private String album = "";									
	private String lrcMaker = "";								
	private List<Statement> statements = new ArrayList<Statement>();		
	
	/* 
	 *  
	 * fileName
	 */
	public utilLrc(String fileName) throws IOException{
		FileInputStream file = new FileInputStream(fileName);
		bufferReader = new BufferedReader(new InputStreamReader(file, "utf-8"));
		readData();
	}
	
	/*
	 * read the file 
	 */
	private void readData() throws IOException{
		statements.clear();
		String strLine;
		while(null != (strLine = bufferReader.readLine()))
		{
			if("".equals(strLine.trim()))
			{
				continue;
			}
			if(null == title || "".equals(title.trim()))
			{
				Pattern pattern = Pattern.compile("\\[ti:(.+?)\\]");
				Matcher matcher = pattern.matcher(strLine);
				if(matcher.find())
				{
					title=matcher.group(1);
					continue;
				}
			}
			if(null == artist || "".equals(artist.trim()))
			{
				Pattern pattern = Pattern.compile("\\[ar:(.+?)\\]");
				Matcher matcher = pattern.matcher(strLine);
				if(matcher.find())
				{
					artist=matcher.group(1);
					continue;
				}
			}
			if(null == album || "".equals(album.trim()))
			{
				Pattern pattern = Pattern.compile("\\[al:(.+?)\\]");
				Matcher matcher = pattern.matcher(strLine);
				if(matcher.find())
				{
					album=matcher.group(1);
					continue;
				}
			}
			if(null == lrcMaker || "".equals(lrcMaker.trim()))
			{
				Pattern pattern = Pattern.compile("\\[by:(.+?)\\]");
				Matcher matcher = pattern.matcher(strLine);
				if(matcher.find())
				{
					lrcMaker=matcher.group(1);
					continue;
				}
			}
			int timeNum=0;										
			String str[] = strLine.split("\\]");				
			for(int i=0; i<str.length; ++i)
			{
				String str2[] = str[i].split("\\[");			
				str[i] = str2[str2.length-1];
				if(isTime(str[i])){
					++timeNum;
				}
			}
			for(int i=0; i<timeNum;++i)					
			{
				Statement sm = new Statement();
				sm.setTime(str[i]);
				if(timeNum<str.length)					
				{
					sm.setLyric(str[str.length-1]);
				}
				statements.add(sm);
			}
		}
		sortLyric();
	}
	/*
	 * judge the string is or not date format. 
	 */
	private boolean isTime(String string)
	{
		String str[] = string.split(":|\\.");
		if(3!=str.length)
		{
			return false;
		}
		try{
			for(int i=0;i<str.length;++i)
			{
				Integer.parseInt(str[i]);
			}
		}
		catch(NumberFormatException e)
		{
			Log.e(TAG, "isTime exception："+e.getMessage());
			return false;
		}
		return true;
	}
	/*
	 * sort the word by time. 
	 */
	private void sortLyric()
	{
		for(int i=0;i<statements.size()-1;++i)
		{
			int index=i;
			double delta=Double.MAX_VALUE;
			boolean moveFlag = false;
			for(int j=i+1;j<statements.size();++j)
			{
				double sub;
				if(0>=(sub=statements.get(i).getTime()-statements.get(j).getTime()))
				{
					continue;
				}
				moveFlag=true;
				if(sub<delta)
				{
					delta=sub;
					index=j+1;
				}
			}
			if(moveFlag)
			{
				statements.add(index, statements.get(i));
				statements.remove(i);
				--i;
			}
		}
	}
	/**
	 * get title
	 * @return
	 */
	public String getTitle(){
		return title;
	}
	/**
	 * get artist
	 * @return
	 */
	public String getArtist(){
		return artist;
	}
	/**
	 * get album
	 * @return
	 */
	public String getAlbum(){
		return album;
	}
	/**
	 * get lrc maker
	 * @return
	 */
	public String getLrcMaker(){
		return lrcMaker;
	}
	/**
	 * get song list
	 * @return
	 */
	public List<Statement> getLrcList(){
		return statements;
	}
}