package xin.glue.ui.common.component;

import java.io.FileInputStream;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

public class PosGlueLogReader {
	private static StringBuffer sb = new StringBuffer();
	private static int index = 0, curIdx = 0;
	public static String dateTime, sqlQuery, params;

	public static void readLog(String filename) {
		readLog(filename, null);
	}

	public static void readLog(String filename, String byDateTime) {
		try {
			InputStream is = new FileInputStream(filename);
			byte[] buffer = new byte[is.available()];
			sb.setLength(0);
			sb.append(new String(buffer, 0, is.read(buffer)));
			is.close();
			go(1, byDateTime);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public static void go(int serial) {
		go(serial, null);
	}

	public static void go(int serial, String byDateTime) {
		index = 0;
		int idx = 0;
		int cnt = 0;
		while (++cnt < serial) {
			if (byDateTime != null && !"".equals(byDateTime)) {
				idx = sb.indexOf(byDateTime, idx);
				if (idx == -1) return;
			}
			idx = sb.indexOf("com.posdata.glue.dao.PosJdbcTemplate||Executing SQL", ++idx);
			if (idx < index) break;
			index = idx;
		}
		next();
		curIdx = cnt;
	}

	public static void next() {
		index = sb.indexOf("com.posdata.glue.dao.PosJdbcTemplate||Executing SQL", index);
		if (index == -1) return;
		int cnt = 5;
		while (!sb.substring(index - cnt, index - cnt + 5).equals("DEBUG")) cnt++;
		dateTime = sb.substring(index - cnt - 24, index - cnt - 1);
//		System.out.println(dateTime);
		int startPos = sb.indexOf("[", index);
		int endPos = sb.indexOf("]", startPos);
		sqlQuery = sb.substring(startPos + 1, endPos).replaceAll("\n[\t]+", "\n");
//		System.out.println(sqlQuery);
		index = endPos;
		List param = new ArrayList();
		while (true) {
			endPos += 2;	// ×Ö·û£º"]\n"
			startPos = sb.indexOf("parameter value [", endPos);
			endPos = sb.indexOf("\n", endPos);
			if (endPos < startPos || startPos < index) break;
			param.add(sb.substring(startPos + 17, sb.indexOf("]", startPos)));
			index = endPos;
		}
		params = "";
		for (int i = 0, size = param.size(); i < size; i++) {
			params += "parameter " + (i+1) + ": " + param.get(i).toString() + "\n";
		}
//		System.out.println(params);
		curIdx++;
	}

	public static void next(String byDateTime) {
		if (byDateTime != null && !"".equals(byDateTime))
			index = sb.indexOf(byDateTime, index);
		next();
	}

	public static void prior() {
		go(curIdx - 1, null);
	}

	public static void prior(String byDateTime) {
		go(curIdx - 1, byDateTime);
	}

	public static void main(String[] args) {
		readLog("F:\\glue_app_debug.log");
		go(8);
		prior();
	}
}