using System;
using System.Linq;
using Comal.Classes;
using InABox.Core;
using System.Diagnostics.CodeAnalysis;

namespace comal.timesheets
{
    public class InOutModel : ListModel<InOutModel,InOutShell,Employee>
    {
        public InOutModel(IModelHost host, Func<Filter<Employee>> filter, bool transient = false) : base(host, filter, transient)
        {
        }

        public InOutModel(IModelHost host, Func<Filter<Employee>> filter, [NotNull] string filename) : base(host, filter, filename)
        {
        }

        protected override void Initialize()
        {
            base.Initialize();
            _statuses = new Tuple<Guid, TimeSpan, TimeSpan>[] { };
        }

        private Tuple<Guid, TimeSpan, TimeSpan>[] _statuses;

        public bool IsClockedOn(Guid id) => _statuses.Any(x => x.Item1.Equals(id) && x.Item3.Equals(TimeSpan.Zero));
        
        public TimeSpan StartTime(Guid id) => _statuses.FirstOrDefault(x => x.Item1.Equals(id))?.Item2 ?? TimeSpan.Zero;
        
        public TimeSpan FinishTime(Guid id) => _statuses.FirstOrDefault(x => x.Item1.Equals(id))?.Item3 ?? TimeSpan.Zero;

        public override void BeforeLoad(MultiQuery query)
        {
            base.BeforeLoad(query);
            query.Add<TimeSheet>(
                new Filter<TimeSheet>(x=>x.EmployeeLink.ID)
                    .InQuery(Filter(), x=>x.ID)
                    .And(x=>x.Date).IsEqualTo(DateTime.Today),
                new Columns<TimeSheet>(x=>x.EmployeeLink.ID)
                    .Add(x=>x.Start)
                    .Add(x=>x.Finish)
            );
        }

        public override void AfterLoad(MultiQuery query)
        {
            base.AfterLoad(query);
            _statuses = query.Get<TimeSheet>()
                    .ToTuples<TimeSheet, Guid, TimeSpan, TimeSpan>(x => x.EmployeeLink.ID, x => x.Start, x => x.Finish).ToArray();
        }
    }
}