using System;
using System.Collections.Generic;
using System.Linq;
using BeWo.Data.Access;
using BeWo.Data.Entities;
using BeWo.Service.DCEntityMapper;
using BS.Shared;
using BS.Shared.DataContracts;
using BS.Shared.Extensions;

namespace BeWo.Report.ReportObjects
{
    public class FLSSollIstReportRO 
    {
        public DateTime? ReportEndDate { get; set; }

        public DateTime? ReportStartDate { get; set; }

        public List<FLSSollIstRootRO> RootObjectList { get; set; } = new List<FLSSollIstRootRO>();

        

        public class FLSSollIstRootRO
        {
            public string Name { get; set; }

            public long ObjectOid { get; set; }

            public TableID ObjectTid { get; set; }

            public List<FLSSollIstReportGroupRO> Groups { get; set; } = new List<FLSSollIstReportGroupRO>();
            public decimal SollGesamt { get; set; }
            public decimal IstGesamt { get; set; }
            public decimal DifferenzSollIstGesamt { get; set; }

            public String CustomValue1 { get; set; }

            public String CustomValue2 { get; set; }

            public String CustomValue3 { get; set; }

            public String CustomValue4 { get; set; }

            public String CustomValue5 { get; set; }
            public List<ServiceRecordFLSOverviewDC> ServiceRecords { get; internal set; } = new List<ServiceRecordFLSOverviewDC>();
        }

        public class FLSSollIstReportGroupRO
        {
            public string Name { get; set; }

            public long ObjectOid { get; set; }

            public TableID ObjectTid { get; set; }

            public List<SupportConceptCostBearerRelDC> CostBearer2SupportConceptList { get; set; } = new List<SupportConceptCostBearerRelDC>();

            public List<FLSSollIstWochenSummen> WochenSummen { get; set; } = new List<FLSSollIstWochenSummen>();

            public decimal SollGesamt { get; set; }

            public decimal IstGesamt { get; set; }
            public decimal DifferenzSollIstGesamt { get; set; }
            public String CustomValue1 { get; set; }

            public String CustomValue2 { get; set; }

            public String CustomValue3 { get; set; }

            public String CustomValue4 { get; set; }

            public String CustomValue5 { get; set; }
            public List<ServiceRecordFLSOverviewDC> ServiceRecords { get; internal set; } = new List<ServiceRecordFLSOverviewDC>();
        }

        public class FLSSollIstWochenSummen
        {
            public decimal? SollStunden { get; set; }

            public decimal? IstStunden { get; set; }

            public decimal? Differenz 
            { 
                get
                {
                    if (IstStunden.HasValue && SollStunden.HasValue)
                    {
                        return IstStunden - SollStunden;
                    }
                    if (SollStunden.HasValue)
                    {
                        return SollStunden * -1;
                    }
                    return IstStunden;
                }
            }

            public DateTime WocheStart { get; set; }

            public DateTime WocheEnde { get; set; }

            public int KalenderWoche 
            { 
                get
                {
                    var ci = System.Globalization.CultureInfo.InvariantCulture;

                    return ci.Calendar.GetWeekOfYear(
                        WocheStart,
                        System.Globalization.CalendarWeekRule.FirstFourDayWeek,
                        DayOfWeek.Monday);
                }
            }

            public List<ServiceRecordFLSOverviewDC> ServiceRecords { get; internal set; } = new List<ServiceRecordFLSOverviewDC>();
        }

        public static FLSSollIstReportRO Create(List<FLSAnalysisRootDC> dcList, FLSAnalysisConfigDC config)
        {
            var ro = new FLSSollIstReportRO();

            ro.ReportStartDate = config.StartDate;
            ro.ReportEndDate = config.EndDate;

            foreach (var root in dcList.OrderBy(a => a.DisplayName))
            {
                var rootRo = new FLSSollIstRootRO();
                rootRo.Name = root.DisplayName;
                rootRo.SollGesamt = 0; //root.SollFLSTotal ?;
                if (root.Employee != null)
                {
                    rootRo.ObjectOid = root.Employee.EmployeeOid;
                    rootRo.ObjectTid = TableID.Employee;
                }
                else if (root.Customer != null)
                {
                    rootRo.ObjectOid = root.Customer.CustomerOid;
                    rootRo.ObjectTid = TableID.Customer;
                }
                foreach (var item in root.Groups.OrderBy(a => a.DisplayName))
                {
                    var grpRo = new FLSSollIstReportGroupRO();
                    grpRo.Name = item.DisplayName;
                    grpRo.WochenSummen = ErstelleWochensummen(config.StartDate, config.EndDate, null);
                    if (item.Employee != null)
                    {
                        grpRo.ObjectOid = item.Employee.EmployeeOid;
                        grpRo.ObjectTid = TableID.Employee;
                    }
                    else if (item.Customer != null)
                    {
                        grpRo.ObjectOid = item.Customer.CustomerOid;
                        grpRo.ObjectTid = TableID.Customer;
                    }
                    foreach (var sc in item.SupportConcepts)
                    {
                        grpRo.CostBearer2SupportConceptList.Add(sc.SupportConcept2CostBearer);
                        
                        foreach (var sr in sc.ServiceRecords)
                        {
                            rootRo.ServiceRecords.Add(sr);
                            grpRo.ServiceRecords.Add(sr);

                            var ws = grpRo.WochenSummen.FirstOrDefault(w => w.WocheStart <= sr.Start && sr.Start < w.WocheEnde.AddDays(1));

                            if (ws != null)
                            {
                                ws.ServiceRecords.Add(sr);
                                if (!ws.IstStunden.HasValue)
                                {
                                    ws.IstStunden = 0;
                                }
                                ws.IstStunden += sr.RoundedDuration / 60;

                                if (!ws.SollStunden.HasValue)
                                {
                                    ws.SollStunden = sr.SollFLSPerWeek;
                                }
                            }
                         
                            grpRo.IstGesamt += sr.RoundedDuration;
                        }
                    }

                    foreach (var ws in grpRo.WochenSummen)
                    {
                        if (!ws.SollStunden.HasValue)
                        {
                            ws.SollStunden = root.SollFLSPerWeek;
                        }
                    }
                    grpRo.IstGesamt = grpRo.IstGesamt / 60;
                    rootRo.IstGesamt += grpRo.IstGesamt;
                    rootRo.SollGesamt = grpRo.WochenSummen.Sum(w => w.SollStunden) ?? 0;
                    rootRo.Groups.Add(grpRo);
                }

                rootRo.DifferenzSollIstGesamt = rootRo.IstGesamt - rootRo.SollGesamt;

                if (rootRo.Groups.Count > 0)
                {
                    ro.RootObjectList.Add(rootRo);
                }
            }

            return ro;
        }

        private static List<FLSSollIstWochenSummen> ErstelleWochensummen(DateTime? startDate, DateTime? endDate, decimal? defaultSoll)
        {
            var liste = new List<FLSSollIstWochenSummen>();
            if (startDate.HasValue && endDate.HasValue)
            {
                DateTime dt = startDate.Value;

                while (dt <= endDate.Value)
                {
                    int days = ((int)DayOfWeek.Sunday - (int)dt.DayOfWeek + 7) % 7;
                    var sonntag = dt.AddDays(days);

                    var ws = new FLSSollIstWochenSummen();
                    ws.WocheStart = dt;

                    //Ermittele den nächsten Sonntag
                    ws.WocheEnde = sonntag;

                    if (ws.WocheEnde > endDate)
                    {
                        ws.WocheEnde = endDate.Value;
                    }
                    ws.SollStunden = defaultSoll;

                    liste.Add(ws);
                    dt = sonntag.AddDays(1);
                }
            }
            return liste;
        }
    }
}