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

namespace Comal.Classes
{
    public class CustomerSales : CoreAggregate<Customer, InvoiceLine, double>
    {
        public override Expression<Func<InvoiceLine, double>> Aggregate => x => x.IncTax;

        public override AggregateCalculation Calculation => AggregateCalculation.Sum;

        public override Dictionary<Expression<Func<InvoiceLine, object>>, Expression<Func<Customer, object>>> Links =>
            new Dictionary<Expression<Func<InvoiceLine, object>>, Expression<Func<Customer, object>>>()
            {
                { InvoiceLine => InvoiceLine.InvoiceLink.CustomerLink.ID, Customer => Customer.ID }
            };
    }

    public class CustomerReceipts : CoreAggregate<Customer, 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<Customer, object>>> Links =>
            new Dictionary<Expression<Func<InvoiceReceipt, object>>, Expression<Func<Customer, object>>>()
            {
                { InvoiceReceipt => InvoiceReceipt.InvoiceLink.CustomerLink.ID, Customer => Customer.ID }
            };
    }

    public class CustomerSites : CoreAggregate<Customer, Customer, Guid>
    {
        public override Expression<Func<Customer, Guid>> Aggregate => x => x.ID;

        public override AggregateCalculation Calculation => AggregateCalculation.Count;

        public override Dictionary<Expression<Func<Customer, object>>, Expression<Func<Customer, object>>> Links =>
            new Dictionary<Expression<Func<Customer, object>>, Expression<Func<Customer, object>>>()
            {
                { Customer => Customer.Account.ID, Customer => Customer.ID }
            };
    }

    public class CustomerBalance : IFormula<Customer, double>
    {
        public Expression<Func<Customer, double>> Value => x => x.TotalSales;
        public Expression<Func<Customer, double>>[] Modifiers => new Expression<Func<Customer, double>>[] { x => x.TotalReceipts };
        public FormulaOperator Operator => FormulaOperator.Subtract;
        public FormulaType Type => FormulaType.Virtual;
    }

    [UserTracking(typeof(Job))]
    public class Customer : Entity, IPersistent, IRemotable, ISchedulable, ILicense<ProjectManagementLicense>, IExportable, IImportable, IMergeable,
        IPostable, IPostableFragment<Invoice>, IPostableFragment<Receipt>
    {
        [EditorSequence(1)]
        [UniqueCodeEditor(Visible = Visible.Default, Editable = Editable.Enabled)]
        public string Code { get; set; }

        [EditorSequence(2)]
        public string Name { get; set; }
        
        [EditorSequence(3)]
        public String ABN { get; set; }

        [EditorSequence(4)]
        [Caption("Delivery")]
        public Address Delivery { get; set; }
        
        [TextBoxEditor(Visible = Visible.Optional, Editable = Editable.Disabled)]
        [Obsolete("Replaced with DefaultContact", false)]
        public string Contact { get; set; }
        
        [EditorSequence(5)]
        public ContactLink DefaultContact { get; set; }

        [EditorSequence(6)]
        [TextBoxEditor]
        public string Email { get; set; }
        
        [EditorSequence(7)]
        public CustomerStatusLink CustomerStatus { get; set; }

        [EditorSequence("Accounts", 1)]
        [Caption("Bill To")]
        public AccountLink Account { get; set; }

        [EditorSequence("Accounts", 2)]
        [Caption("Address")]
        public Address Postal { get; set; }

        [EditorSequence("Accounts", 3)]
        [Caption("# Sites")]
        [IntegerEditor(Editable = Editable.Hidden, Summary = Summary.Sum)]
        [Aggregate(typeof(CustomerSites))]
        public int Sites { get; set; }

        [EditorSequence("Accounts", 4)]
        [CurrencyEditor(Editable = Editable.Disabled, Summary = Summary.Sum)]
        [Aggregate(typeof(CustomerSales))]
        public double TotalSales { get; set; }

        [EditorSequence("Accounts", 5)]
        [CurrencyEditor(Editable = Editable.Disabled, Summary = Summary.Sum)]
        [Aggregate(typeof(CustomerReceipts))]
        public double TotalReceipts { get; set; }

        [EditorSequence("Accounts", 6)]
        [CurrencyEditor(Editable = Editable.Hidden, Summary = Summary.Sum)]
        [Formula(typeof(CustomerBalance))]
        public double Balance { get; set; }

        [NullEditor]
        [Aggregate(typeof(ActiveSchedules))]
        public int ActiveSchedules { get; set; }

        [NullEditor]
        public DateTime Posted { get; set; }

        [NullEditor]
        [RequiredColumn]
        public PostedStatus PostedStatus { get; set; }

        [NullEditor]
        public string PostedNote { get; set; }

        [NullEditor]
        public string PostedReference { get; set; }

        public override string ToString()
        {
            return Name;
        }
    }
}