using NHibernate.Mapping.ByCode;
using NHibernate.Mapping.ByCode.Conformist;
using System;
using System.Collections.Generic;

namespace Tanshu.Accounts.Entities
{
    public class Inventory
    {
        public Inventory()
        {
            InventoryModifier = new List<InventoryModifier>();
        }

        public virtual Guid InventoryID { get; set; }
        public virtual Kot Kot { get; set; }
        public virtual int SortOrder { get; set; }
        public virtual Product Product { get; set; }
        public virtual decimal Quantity { get; set; }
        public virtual decimal Price { get; set; }
        public virtual bool IsHappyHour { get; set; }
        public virtual decimal ServiceCharge { get; set; }
        public virtual bool IsScTaxable { get; set; }
        public virtual decimal ServiceTaxRate { get; set; }
        public virtual decimal VatRate { get; set; }
        public virtual Tax ServiceTax { get; set; }
        public virtual Tax Vat { get; set; }
        public virtual decimal Discount { get; set; }

        public virtual IList<InventoryModifier> InventoryModifier { get; set; }

        public virtual string EffectiveName
        {
            get
            {
                return IsHappyHour ? string.Format("H H {0}", Product.FullName) : Product.FullName;
            }
            set { }
        }
        public virtual decimal EffectivePrice
        {
            get
            {
                return IsHappyHour ? 0 : Price;
            }
            set { }
        }
        public virtual decimal Amount
        {
            get
            {
                if (IsScTaxable)
                    return Quantity * EffectivePrice * (1 - Discount) * (1 + ServiceCharge) * (1 + ServiceTaxRate + VatRate);
                return Quantity * EffectivePrice * (1 - Discount) * (1 + ServiceCharge + ServiceTaxRate + VatRate);
            }
            set { }
        }

        public virtual decimal ServiceTaxAmount
        {
            get
            {
                if (IsScTaxable)
                    return Quantity * EffectivePrice * (1 - Discount) * (1 + ServiceCharge) * ServiceTaxRate;
                return Quantity * EffectivePrice * (1 - Discount) * ServiceTaxRate;
            }
        }

        public virtual decimal VatAmount
        {
            get
            {
                if (IsScTaxable)
                    return Quantity * EffectivePrice * (1 - Discount) * (1 + ServiceCharge) * VatRate;
                return Quantity * EffectivePrice * (1 - Discount) * VatRate;
            }
        }

        public virtual decimal ServiceChargeAmount
        {
            get
            {
                return Quantity * EffectivePrice * (1 - Discount) * ServiceCharge;
            }
        }

        public virtual decimal DiscountAmount
        {
            get
            {
                return Quantity * EffectivePrice * Discount;
            }
        }

        public virtual decimal Net
        {
            get
            {
                return Quantity * EffectivePrice * (1 - Discount);
            }
        }
    }
    public class InventoryMap : ClassMapping<Inventory>
    {
        public InventoryMap()
        {
            Table("Inventories");
            Schema("dbo");
            Lazy(true);
            Id(x => x.InventoryID, m => m.Generator(Generators.GuidComb));
            Property(x => x.SortOrder, map => map.NotNullable(true));
            Property(x => x.Quantity, map => map.NotNullable(true));
            Property(x => x.Price, map => map.NotNullable(true));
            Property(x => x.IsHappyHour, map => map.NotNullable(true));
            Property(x => x.ServiceTaxRate, map => map.NotNullable(true));
            Property(x => x.VatRate, map => map.NotNullable(true));
            Property(x => x.Discount, map => map.NotNullable(true));
            Property(x => x.ServiceCharge, map => map.NotNullable(true));
            Property(x => x.IsScTaxable, map => map.NotNullable(true));
            Property(x => x.EffectivePrice, map =>
            {
                map.Formula("CASE WHEN IsHappyHour = 1 THEN 0 ELSE Price END");
            });
            Property(x => x.Amount, map =>
            {
                map.Formula("Quantity * CASE WHEN IsHappyHour = 1 THEN 0 ELSE Price END * (1 - Discount) * CASE WHEN IsScTaxable = 1 THEN (1 + ServiceCharge) * (1 + ServiceTaxRate + VatRate) ELSE (1 + ServiceCharge + ServiceTaxRate + VatRate) END");
            });

            ManyToOne(x => x.ServiceTax, map =>
            {
                map.Column("ServiceTaxID");
                map.NotNullable(true);
                map.Cascade(Cascade.None);
            });
            ManyToOne(x => x.Vat, map =>
            {
                map.Column("VatID");
                map.NotNullable(true);
                map.Cascade(Cascade.None);
            });
            ManyToOne(x => x.Kot, map =>
            {
                map.Column("KotID");
                map.NotNullable(true);
                map.Cascade(Cascade.None);
            });
            ManyToOne(x => x.Product, map =>
            {
                map.Column("ProductID");
                map.NotNullable(true);
                map.Cascade(Cascade.None);
            });
            Bag(x => x.InventoryModifier, colmap => { colmap.Key(x => x.Column("InventoryID")); colmap.Inverse(true); }, map => { map.OneToMany(); });
        }
    }
}