using System;
using DevExpress.XtraReports.UI;
using EnVisage.Models;
using System.Web.Script.Serialization;
using System.Collections.Generic;
using System.Collections;
using Envisage.Code.DAL;
using EnVisage.Code.DAL;
using System.IO;

namespace EnVisage.Code.BLL
{
	public class ReportManager
	{
		public static XtraReport LoadReport(ReportCallbackModel model)
		{
			if (null == model)
				throw new ArgumentNullException("model");
			XtraReport report = null;
            
            #region Serializing report parameters to be able to keep sorting params between report partial postbacks
            var keys = new List<string>();
            var values = new List<bool>();
            if (model.SortFields != null)
                foreach (var val in model.SortFields)
                {
                    keys.Add(val.Key);
                    values.Add(val.Value);
                }
            var keysXml = keys.Serialize();
            var valuesXml = values.Serialize();
            #endregion

            switch (model.ReportId)
			{
                case Constants.REPORT_TEST_ID:
                    report = new XtraReport2();
                    report.Parameters[Constants.REPORT_SORT_FIELD_PARAMETER_NAME].Value = keysXml;
                    report.Parameters[Constants.REPORT_SORT_DIR_PARAMETER_NAME].Value = valuesXml;
                    break;
                case Constants.REPORT_SUMMARY_ID:
                    report = new EnVisage.Reports.SummaryReport();
                    report.Parameters[Constants.REPORT_SORT_FIELD_PARAMETER_NAME].Value = keysXml;
                    report.Parameters[Constants.REPORT_SORT_DIR_PARAMETER_NAME].Value = valuesXml;
                    break;
                case Constants.REPORT_FOREREVENUE_ID:
                    report = new EnVisage.Reports.ForecastRevenueReport();
                    report.Parameters[Constants.REPORT_SORT_FIELD_PARAMETER_NAME].Value = keysXml;
                    report.Parameters[Constants.REPORT_SORT_DIR_PARAMETER_NAME].Value = valuesXml;
                    break;
                case Constants.REPORT_NONFOREREVENUE_ID:
                    report = new EnVisage.Reports.ForecastNonRevenueReport();
                    report.Parameters[Constants.REPORT_SORT_FIELD_PARAMETER_NAME].Value = keysXml;
                    report.Parameters[Constants.REPORT_SORT_DIR_PARAMETER_NAME].Value = valuesXml;
                    break;
                default:
                    using (var session = SessionFactory.Create())
                    {
                        var reportEntity = session.GetObjectByKey<UserReport>(Convert.ToInt32(model.ReportId));
                        if (reportEntity != null && reportEntity.Layout != null)
                            using (var stream = new MemoryStream(reportEntity.Layout))
                            {
                                report = XtraReport.FromStream(stream, true);
                            }
                    }
                    break;
            }
			if (null == report)
				throw new NullReferenceException("Cannot find report by provided Id: " + model.ReportId);
			return report;
		}
	}
}