using System;
using System.Collections.Generic;
using Dapper;
using DataModel.Helpers;
using DataModel.Models;
using Oracle.ManagedDataAccess.Client;

namespace DataModel.Process
{
    /// <summary>
    /// JDE business units tracking functionality for JDE interface
    /// </summary>
    public partial class JDE
    {
        /// <summary>
        /// Fetches updated branches
        /// </summary>
        /// <param name="lastUpdateDT">Timestamp of last updated record already imported</param>
        /// <returns>Streaming updated branches</returns>
        public static IEnumerable<Branch> GetBranches(DateTime? lastUpdateDT = null)
        {
            using (OracleConnection connection = GetConnection())
            {
                var results = lastUpdateDT.HasValue ?
                    connection.Query<Branch>(queries["SQL_GET_BUSINESS_UNITS_FILTERED"], new { typeCode = "BP", dateUpdated = lastUpdateDT.Value.ToJDEDate(), timeUpdated = lastUpdateDT.Value.ToJDETime() }, buffered: false, commandTimeout: Config.QueryTimeout) :
                    connection.Query<Branch>(queries["SQL_GET_BUSINESS_UNITS"], new { typeCode = "BP" }, buffered: false, commandTimeout: Config.QueryTimeout);
                
                foreach (var result in results)
                {
                    yield return result;
                }
            }
        }

        /// <summary>
        /// Fetches updated profit centers
        /// </summary>
        /// <param name="lastUpdateDT">Timestamp of last updated record already imported</param>
        /// <returns>Streaming updated profit centers</returns>
        public static IEnumerable<ProfitCenter> GetProfitCenters(DateTime? lastUpdateDT = null)
        {
            using (OracleConnection connection = GetConnection())
            {
                var results = lastUpdateDT.HasValue ?
                    connection.Query<ProfitCenter>(queries["SQL_GET_BUSINESS_UNITS_FILTERED"], new { typeCode = "I3", dateUpdated = lastUpdateDT.Value.ToJDEDate(), timeUpdated = lastUpdateDT.Value.ToJDETime() }, buffered: false, commandTimeout: Config.QueryTimeout) :
                    connection.Query<ProfitCenter>(queries["SQL_GET_BUSINESS_UNITS"], new { typeCode = "I3" }, buffered: false, commandTimeout: Config.QueryTimeout);

                foreach (var result in results)
                {
                    yield return result;
                }
            }
        }

        /// <summary>
        /// Fetches updated work centers
        /// </summary>
        /// <param name="lastUpdateDT">Timestamp of last updated record already imported</param>
        /// <returns>Streaming updated work centers</returns>
        public static IEnumerable<WorkCenter> GetWorkCenters(DateTime? lastUpdateDT = null)
        {
            using (OracleConnection connection = GetConnection())
            {
                var results = lastUpdateDT.HasValue ?
                    connection.Query<WorkCenter>(queries["SQL_GET_BUSINESS_UNITS_FILTERED"], new { typeCode = "WC", dateUpdated = lastUpdateDT.Value.ToJDEDate(), timeUpdated = lastUpdateDT.Value.ToJDETime() }, buffered: false, commandTimeout: Config.QueryTimeout) :
                    connection.Query<WorkCenter>(queries["SQL_GET_BUSINESS_UNITS"], new { typeCode = "WC" }, buffered: false, commandTimeout: Config.QueryTimeout);

                foreach (var result in results)
                {
                    yield return result;
                }
            }
        }
    }
}