package compbio.cassandra;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.List;

import org.apache.log4j.Logger;

import com.datastax.driver.core.ResultSet;
import com.datastax.driver.core.Row;
import com.datastax.driver.core.Session;

public class CassandraRemover {
	private Session session;
	static SimpleDateFormat dateformatter =  new SimpleDateFormat("yyyy/MM/dd");
	private static Logger log = Logger.getLogger(CassandraNativeConnector.class);

	public CassandraRemover() {
		Session inis = CassandraNativeConnector.getSession();
		setSession (inis);
	}

	public void setSession(Session s) {
		assert s != null;
		session = s;
	}
	
	/*
	 * delete a record from CF for current jobId
	 */
	private void RemoveJob(String jobid, long date) {
		String status = FindStatus(jobid);
		String com0 = "DELETE FROM ProteinLog WHERE JobID = '" + jobid + "';";
		System.out.println("Command: " + com0);
		session.execute(com0);
		String com3 = "UPDATE jpredarchive SET finalstatus = 'DELETED'  WHERE JobID = '" + jobid + "' ;";
		System.out.println("Command: " + com3);
		session.execute(com3);
		String com = "SELECT * FROM JobDateInfo WHERE jobday = " + date + ";";
		System.out.println("Command: " + com);
		ResultSet results = session.execute(com);
		Row row = results.one();
		long njobs = row.getLong("Total") -1 ;
		if (status.equals("OK")) {
			long njobsOK = row.getLong("TotalOK") - 1;
			String com1 = "DELETE FROM ProteinRow WHERE JobID = '" + jobid + "';";
			System.out.println("Command: " + com1);
			session.execute(com1);
			String com2 = "DELETE FROM ProteinData WHERE JobID = '" + jobid + "' AND jobtime = " + date + ";";
			System.out.println("Command: " + com2);
			session.execute(com2);
			UpdateJobDateInfo(date, "TotalOK", njobsOK, njobs);
		} else {
			String com6 = "DELETE FROM FailLog WHERE JobID = '" + jobid + "' AND jobtime = " + date + ";";
			System.out.println("Command: " + com6);
			session.execute(com6);
			if (status.equals("STOPPED")) {
				long njobsStopped = row.getLong("TotalStopped") - 1;
				UpdateJobDateInfo(date, "TotalStopped", njobsStopped, njobs);
			} else if (status.equals("ERROR")) {
				long njobsError = row.getLong("TotalError") - 1;
				UpdateJobDateInfo(date, "TotalError", njobsError, njobs);
			} else if (status.equals("TIMEDOUT")) {
				long njobsTimeOut = row.getLong("TotalTimeOut") - 1;
				UpdateJobDateInfo(date, "TotalTimeOut", njobsTimeOut, njobs);
			}
		}
		System.out.println("Remove jobs: " + jobid);
	}
	
	private void UpdateJobDateInfo(long date, String ColumnName, long totalcol, long total) {
		String com4 = "UPDATE JobDateInfo SET " + ColumnName + " = " + totalcol + ", Total = " + total + " WHERE jobday = " + date + ";";
		System.out.println("Command: " + com4);
		session.execute(com4);
	}
	
	public int RemoveJobById (String jobid) {
		if (jobid == null) 
			return 0;
		Long date = FindDate(jobid);
		RemoveJob(jobid, date);
		return 1;
	}
	
	public int RemoveJobByDate (String date1, String date2) {
		int numremover = 0;
		if (date1 == null || date2 == null) 
			return 0;
		Long dateBegin = convertDate(date1);
		Long dateEnd = convertDate(date2);
		Calendar start = Calendar.getInstance();
		start.setTime(new Date(dateBegin));
		Calendar end = Calendar.getInstance();
		end.setTime(new Date(dateEnd));
		for (Date date = start.getTime(); !start.after(end); start.add(Calendar.DATE, 1), date = start.getTime()) {
			System.out.println("--------------------------------------------------------------------: ");
			String com = "SELECT JobID FROM ProteinData WHERE jobtime = " + date.getTime() + ";";
			System.out.println("Command: " + com);
			ResultSet results = session.execute(com);
			if (!results.isExhausted()) {
				List<Row> rows = results.all();
				for (Row r : rows) {
					String jobid = r.getString("JobID");
					if (jobid != null) {
						RemoveJob(jobid, date.getTime());
						numremover++;
					}
				}
			}
			String comm = "SELECT JobID FROM FailLog WHERE jobtime = " + date.getTime() + ";";
			System.out.println("^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^: " + comm);
			ResultSet resultsfail = session.execute(comm);
			System.out.println("^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^: " + comm);
			if (!resultsfail.isExhausted()) {
				List<Row> rows = resultsfail.all();
				for (Row r : rows) {
					String jobid = r.getString("JobID");
					System.out.println("^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^: " + jobid);
					if (jobid != null) {
						RemoveJob(jobid, date.getTime());
						numremover++;
					}
				}
			}
		}
		return numremover;
	}
	
	
	public int RemoveJobByIp (String ip) {
		int numremover = 0;
		if (ip == null) 
			return 0;
		String com = "SELECT databegin, JobID FROM ProteinLog WHERE ip = '" + ip + "';";
		ResultSet results = session.execute(com);
		if (!results.isExhausted()) {
			List<Row> rows = results.all();
			for (Row r : rows) {
				Long date = convertDate(r.getString("databegin"));
				String jobid = r.getString("JobID");
				if (date == null || jobid == null)
					continue;
				RemoveJob(jobid, date);
				numremover++;
			}
		}
		return numremover;
	}
	
	public int RemoveJobBySequence (String seq) {
		int numremover = 0;
		if (seq == null) 
			return 0;
		String com = "SELECT JobID FROM ProteinRow WHERE Protein = '" + seq + "';";
		ResultSet results = session.execute(com);
		if (!results.isExhausted()) {
			List<Row> rows = results.all();
			for (Row r : rows) {
				String jobid = r.getString("JobID");
				Long date = FindDate(jobid);
				RemoveJob(jobid, date);
				numremover++;
			}
		}
		return numremover;
	}
	 
	private Long FindDate(String jobid) {
		String com = "SELECT databegin FROM ProteinLog WHERE JobID = '" + jobid + "';";
		ResultSet results = session.execute(com);
		Long date = convertDate(results.one().getString("databegin"));
		return date;
	}
	
	private String FindStatus(String jobid) {
		String com = "SELECT FinalStatus FROM ProteinLog WHERE JobID = '" + jobid + "';";
		System.out.println("Command: " + com);
		ResultSet results = session.execute(com);
		String status = results.one().getString("FinalStatus");
		System.out.println("*****status: " + status);
		return status;
	}
	
	protected long convertDate (String d) {
		try {
			if (null != d) {
				Date startdate = dateformatter.parse(d);
				return startdate.getTime();
			}
		} catch (ParseException e) {
			e.printStackTrace();
		}
		return 0L;
	}

}