using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace bnhtrade.Core.Model.Account
{
    public class PurchaseInvoice
    {
        // the purchase/sales invoice models are fragmented. The sales invoice inherits from an abstract invoice class. However, this purchase invoice
        // model doesn't, it was setup in the early development to mirror an Amazon report.
        // At some point I would like to correct this, i.e. have the purchase invoice model inherit from the abstract invoice class.
        // this will take some unpicking

        public int PurchaseID { get; set; }

        public int PurchaseNumber { get; set; }

        public int? RecordID { get; set; }

        public DateTime PurchaseDate { get; set; }

        public Model.Account.Contact Contact { get; set; }

        public string SupplierRef { get; set; }

        public string AccountCurrency { get; set; }

        public string PurchaseChannel { get; set; }

        public string CurrencyCode { get; set; }

        public decimal InvoiceNetAmount
        {
            get
            {
                return InvoiceGrossAmount - InvoiceTaxAmount;
            }
        }

        public decimal InvoiceTaxAmount
        {
            get
            {
                decimal amount = 0;
                foreach (var item in InvoiceLines)
                {
                    amount = amount + item.LineTotalTax;
                }
                return amount;
            }
        }

        public decimal InvoiceGrossAmount 
        {
            get
            {
                decimal amount = 0;
                foreach (var item in InvoiceLines)
                {
                    amount = amount + item.LineTotalGross;
                }
                return amount;
            }
        }

        /// <summary>
        /// Value stored in database to check invoice lines against
        /// </summary>
        public decimal InvoiceGrossAmountCheck { get; set; }

        /// <summary>
        /// Don't know what this is for, all the amounts in the db are gross, so this is always true 
        /// </summary>
        public bool VatInclusiveAmounts { get; set; }

        public DateTime RecordCreated { get; set; }

        public DateTime RecordModified { get; set; }

        public bool IsActive { get; set; }

        public List<Model.Account.PurchaseInvoice.Line> InvoiceLines { get; set; }

        public class Line
        {
            public int PurchaseLineId { get; set; }

            public int PurchaseId { get; set; }

            public string Status { get; set; }

            public string SupplierRef { get; set; }

            public DateTime? CheckedIn { get; set; }

            public string ItemDescription { get; set; }

            public int ItemQuantity { get; set; }

            public decimal ItemNet
            {
                get
                {
                    return ItemGross - ItemTax;
                }
            }

            public decimal ItemGross { get; set; }

            public decimal ItemTax { get; set; }

            public decimal ShippingNet
            {
                get
                {
                    return ShippingGross - ShippingTax;
                }
            }

            public decimal ShippingGross { get; set; }

            public decimal ShippingTax { get; set; }

            public decimal OtherNet
            {
                get
                {
                    return OtherGross - OtherTax;
                }
            }

            public decimal OtherGross { get; set; }

            public decimal OtherTax { get; set; }

            public decimal LineTotalNet
            {
                get
                {
                    return (ItemGross + ShippingGross + OtherGross) - (ItemTax + ShippingTax + OtherTax);
                }
            }

            public decimal LineTotalTax
            {
                get
                {
                    return ItemTax + ShippingTax + OtherTax;
                }
            }

            public decimal LineTotalGross
            {
                get
                {
                    return ItemGross + ShippingGross + OtherGross;
                }
            }

            public bnhtrade.Core.Model.Account.TaxCodeInfo AccountTaxCode { get; set; }

            public int? Tax_AccountTransactionId { get; set; }

            public int Net_AccountChartOfId { get; set; }

            public int? Net_AccountTransactionId { get; set; }

            public DateTime RecordCreated { get; set; }

            public DateTime RecordModified { get; set; }

            public bool IsActive { get; set; }
        }
    }
}