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

namespace comal.timesheets
{
    public class EmployeeDetailModel : DetailModel<EmployeeDetailModel,EmployeeDetailShell,Employee>
    {

        public EmployeeDetailModel(IModelHost host, Func<Filter<Employee>> filter, bool transient = false) : base(host, filter, transient)
        {
        }

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

        protected override void Initialize()
        {
            base.Initialize();
            Activities = new EmployeeActivityShell[] { };
            Forms = new EmployeeFormShell[] { };
        }

        public EmployeeActivityShell[] Activities { get; private set; }
        public EmployeeFormShell[] Forms { get; private set; }
        
        protected override Expression<Func<Employee, object>> ImageColumn => x => x.Thumbnail.ID;

        public override void BeforeLoad(MultiQuery query)
        {
            base.BeforeLoad(query);
            
            query.Add(
                new Filter<EmployeeActivity>(x => x.Employee.ID).InQuery(Filter(),x=>x.ID),
                EmployeeActivityShell.Columns.Columns
            );
            
            query.Add(
                new Filter<EmployeeForm>(x => x.Parent.ID).InQuery(Filter(),x=>x.ID),
                EmployeeFormShell.Columns.Columns
            );
        }

        public override void AfterLoad(MultiQuery query)
        {
            base.AfterLoad(query);
            
            Activities = query.Get<EmployeeActivity>()
                .Rows
                .Select(x => new EmployeeActivityShell() { Row = x, Parent = this })
                .ToArray();
            
            Forms = query.Get<EmployeeForm>()
                .Rows
                .Select(x => new EmployeeFormShell() { Row = x, Parent = this })
                .ToArray();
        }

        public Guid ID => Item?.ID ?? Guid.Empty;
        public String Name => Item?.Name ?? "";


    }
}