using System;
using System.Collections.Generic;
using System.Linq.Expressions;
using InABox.Core;

namespace Comal.Classes
{
    public class ReceiptTotal : CoreAggregate<Receipt, InvoiceReceipt, double>
    {
        public override Expression<Func<InvoiceReceipt, double>> Aggregate => x => x.Amount;

        public override AggregateCalculation Calculation => AggregateCalculation.Sum;

        public override Dictionary<Expression<Func<InvoiceReceipt, object>>, Expression<Func<Receipt, object>>> Links =>
            new Dictionary<Expression<Func<InvoiceReceipt, object>>, Expression<Func<Receipt, object>>>()
            {
                { InvoiceReceipt => InvoiceReceipt.ReceiptLink.ID, Receipt => Receipt.ID }
            };
    }

    [UserTracking(typeof(Invoice))]
    public class Receipt : Entity, IPersistent, IRemotable, ILicense<AccountsReceivableLicense>
    {
        [DateEditor(TodayVisible = true)]
        [EditorSequence(0)]
        public DateTime Date { get; set; } = DateTime.Today;

        [EditorSequence(1)]
        public CustomerLink CustomerLink { get; set; }

        [EditorSequence(2)]
        public ReceiptTypeLink ReceiptTypeLink { get; set; }

        [MemoEditor(Visible = Visible.Default)]
        [EditorSequence(3)]
        public string Notes { get; set; }

        [TimestampEditor(Visible = Visible.Default)]
        [EditorSequence(4)]
        public DateTime Reconciled { get; set; }

        [CurrencyEditor(Visible = Visible.Default, Editable = Editable.Hidden, Summary = Summary.Sum)]
        [Aggregate(typeof(ReceiptTotal))]
        public double Total { get; set; }

        public override string ToString()
        {
            return string.Format("{0:dd MMM yy}: {1} (${2:F2})", Date, ReceiptTypeLink.Description, Total);
        }
    }
}