using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using log4net;

namespace bsmd.pasttrack.service
{
    public class Service : IService
    {
        private static ILog _log = LogManager.GetLogger(typeof(Service));

        public Pasttrack[] GetPasttrack(int mmsi, int mins)
        {
            List<Pasttrack> aList = new List<Pasttrack>();

            // Query 
            try
            {
                SqlConnection con = new SqlConnection(Properties.Settings.Default.ConnectionString);
                con.Open();
                string cmdText = string.Format("select Latitude, Longitude, Heading, Timestamp from aisposreport where mmsi=@MMSI And timestamp > DATEADD(MINUTE, @MIN, GETDATE()) order by timestamp desc");
                SqlCommand cmd = new SqlCommand(cmdText, con);
                cmd.Parameters.AddWithValue("@MMSI", mmsi);
                cmd.Parameters.AddWithValue("@MIN", -mins);
                SqlDataReader reader = cmd.ExecuteReader();
                while(reader.Read())
                {
                    Pasttrack p = new Pasttrack();
                    p.Latitude = (double) reader.GetInt32(0) / 600000.0;
                    p.Longitude = (double) reader.GetInt32(1) / 600000.0;
                    p.Heading = reader.GetInt32(2);
                    p.Timestamp = reader.GetDateTime(3);
                    aList.Add(p);
                }
                reader.Close();
                con.Close();
            } catch (SqlException ex)
            {
                _log.ErrorFormat("Error on data query: {0}", ex.ToString());
            }
            _log.InfoFormat("Result pasttrack array contains {0} elems", aList.Count);
            return aList.ToArray();
        }
    }
}