using System;
using System.Collections.Generic;
using System.Linq;
using System.Data;
using System.Text;
using System.Diagnostics;
using IndianHealthService.BMXNet;

namespace IndianHealthService.ClinicalScheduling
{
    /// <summary>
    /// Data Access Layer
    /// </summary>
    public class DAL
    {
        private BMXNetConnectInfo _thisConnection; // set in constructor
        
        delegate DataTable RPMSDataTableDelegate(string CommandString, string TableName); // for use in calling (Sync and Async)

        /// <summary>
        /// Constructor
        /// </summary>
        /// <param name="conn">The current connection to use</param>
        public DAL(BMXNetConnectInfo conn)
        {
            this._thisConnection = conn;
        }
        
        public DataTable GetVersion(string nmsp)
        {
            string cmd = String.Format("BMX VERSION INFO^{0}", nmsp);
            return RPMSDataTable(cmd, "");
        }

        public DataTable GetUserInfo(string DUZ)
        {
            string cmd = String.Format("BSDX SCHEDULING USER INFO^{0}", DUZ);
            return RPMSDataTable(cmd, "");
        }

        public DataTable GetAccessTypes()
        {
            string sCommandText = "SELECT * FROM BSDX_ACCESS_TYPE";
            DataTable table = RPMSDataTable(sCommandText, "");
            DataColumn dcKey = table.Columns["BMXIEN"];
            DataColumn[] dcKeys = new DataColumn[1];
            dcKeys[0] = dcKey;
            table.PrimaryKey = dcKeys;
            return table;
        }

        /// <summary>
        /// Get the Patients who have appointments in between dates for the clinics requested
        /// </summary>
        /// <param name="sClinicList">| delimited resource list (resource IENS, not names)</param>
        /// <param name="BeginDate">Self Explanatory</param>
        /// <param name="EndDate">Self Explanatory</param>
        /// <returns>DataTable with the following columns:
        /// T00030Name^D00020DOB^T00030Sex^T00030HRN^D00030ApptDate^T00030Clinic^T00030TypeStatus
        /// I00010RESOURCEID^T00030APPT_MADE_BY^D00020DATE_APPT_MADE^T00250NOTE^T00030STREET^
        /// T00030CITY^T00030STATE^T00030ZIP^T00030HOMEPHONE
        ///</returns>
        ///<remarks>Mirrors dsPatientApptDisplay2.PatientAppts Schema in this project. Can merge table into schema.</remarks>
        public DataTable GetClinicSchedules(string sClinicList, DateTime BeginDate, DateTime EndDate)
        {
            string sBegin = FMDateTime.Create(BeginDate).DateOnly.FMDateString;
            string sEnd = FMDateTime.Create(EndDate).DateOnly.FMDateString;
            string cmd = String.Format("BSDX CLINIC LETTERS^{0}^{1}^{2}", sClinicList, sBegin, sEnd);
            return RPMSDataTable(cmd, "");
        }

        /// <summary>
        /// Get the letter templates associated with the requested clinics (reminder letter, cancellation letter etc)
        /// </summary>
        /// <param name="sClinicList">| delimited resource list (resource IENS, not names)</param>
        /// <returns>DataTable with the following columns:
        /// I00010RESOURCEID^T00030RESOURCE_NAME^T00030LETTER_TEXT^T00030NO_SHOW_LETTER^T00030CLINIC_CANCELLATION_LETTER
        /// </returns>
        /// <remarks>Mirrors dsPatientApptDisplay2.BSDXResource Schema. Can merge table into schema.</remarks>
        public DataTable GetResourceLetters(string sClinicList)
        {
            string cmd = String.Format("BSDX RESOURCE LETTERS^{0}", sClinicList);
            return RPMSDataTable(cmd, "");
        }

        /// <summary>
        /// Get the list of Patients who have Rebooked Appointments
        /// </summary>
        /// <param name="sClinicList">| delimited resource list (resource IENS, not names)</param>
        /// <param name="BeginDate">Self Explanatory</param>
        /// <param name="EndDate">Self Explanatory</param>
        /// <returns>T00030Name^D00020DOB^T00030Sex^T00030HRN^D00030NewApptDate^T00030Clinic^T00030TypeStatus
        /// ^I00010RESOURCEID^T00030APPT_MADE_BY^D00020DATE_APPT_MADE^T00250NOTE^T00030STREET^T00030CITY
        /// ^T00030STATE^T00030ZIP^T00030HOMEPHONE^D00030OldApptDate
        ///</returns>
        /// <remarks>Mirrors dsRebookAppts.PatientAppt Schema. Can merge table into schema.</remarks>
        public DataTable GetRebookedAppointments(string sClinicList, DateTime BeginDate, DateTime EndDate)
        {
            string sBegin = FMDateTime.Create(BeginDate).DateOnly.FMDateString;
            string sEnd = FMDateTime.Create(EndDate).DateOnly.FMDateString;
            string cmd = String.Format("BSDX REBOOK CLINIC LIST^{0}^{1}^{2}", sClinicList, sBegin, sEnd);
            return RPMSDataTable(cmd, "");
        }

        public DataTable GetRebookedAppointments(string sApptList)
        {
            string cmd = String.Format("BSDX REBOOK LIST^{0}", sApptList);
            return RPMSDataTable(cmd, "");
        }

        public DataTable GetCancelledAppointments(string sClinicList, DateTime BeginDate, DateTime EndDate)
        {
            string sBegin = FMDateTime.Create(BeginDate).DateOnly.FMDateString;
            string sEnd = FMDateTime.Create(EndDate).DateOnly.FMDateString;
            string cmd = String.Format("BSDX CANCEL CLINIC LIST^{0}^{1}^{2}", sClinicList, sBegin, sEnd);
            return RPMSDataTable(cmd, "");
        }


        /// <summary>
        /// Workhorse
        /// </summary>
        /// <param name="sSQL"></param>
        /// <param name="sTableName"></param>
        /// <returns></returns>
        private DataTable RPMSDataTable(string sSQL, string sTableName)
        {
            //Retrieves a recordset from RPMS
            string sErrorMessage = "";
            DataTable dtOut;

#if TRACE
            DateTime sendTime = DateTime.Now;
#endif
            try
            {
                RPMSDataTableDelegate rdtd = new RPMSDataTableDelegate(_thisConnection.RPMSDataTable);
                dtOut = (DataTable)rdtd.Invoke(sSQL, sTableName);
            }

            catch (Exception ex)
            {
                sErrorMessage = "DAL.RPMSDataTable error: " + ex.Message;
                throw ex;
            }

#if TRACE
            DateTime receiveTime = DateTime.Now;
            TimeSpan executionTime = receiveTime - sendTime;
            Debug.Write("RPMSDataTable Execution Time: " + executionTime.Milliseconds + " ms.\n");
#endif

            return dtOut;

        }


    }
}