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

namespace Comal.Classes
{
    public class QuoteProposalCostSheetExTax : IFormula<QuoteProposalCostSheet, double>
    {
        public Expression<Func<QuoteProposalCostSheet, double>> Value => x => x.CostSheet.ExTax;
        public Expression<Func<QuoteProposalCostSheet, double>>[] Modifiers => new Expression<Func<QuoteProposalCostSheet, double>>[] { x => x.Qty };
        public FormulaOperator Operator => FormulaOperator.Multiply;
        public FormulaType Type => FormulaType.Virtual;
    }

    public class QuoteProposalCostSheetTax : IFormula<QuoteProposalCostSheet, double>
    {
        public Expression<Func<QuoteProposalCostSheet, double>> Value => x => x.CostSheet.Tax;
        public Expression<Func<QuoteProposalCostSheet, double>>[] Modifiers => new Expression<Func<QuoteProposalCostSheet, double>>[] { x => x.Qty };
        public FormulaOperator Operator => FormulaOperator.Multiply;
        public FormulaType Type => FormulaType.Virtual;
    }

    public class QuoteProposalCostSheetIncTax : IFormula<QuoteProposalCostSheet, double>
    {
        public Expression<Func<QuoteProposalCostSheet, double>> Value => x => x.CostSheet.IncTax;
        public Expression<Func<QuoteProposalCostSheet, double>>[] Modifiers => new Expression<Func<QuoteProposalCostSheet, double>>[] { x => x.Qty };
        public FormulaOperator Operator => FormulaOperator.Multiply;
        public FormulaType Type => FormulaType.Virtual;
    }

    [UserTracking(typeof(Quote))]
    public class QuoteProposalCostSheet : Entity, IRemotable, IPersistent, IQuoteProposalCostSheet, ILicense<QuotesManagementLicense>
    {
        [NullEditor]
        [EntityRelationship(DeleteAction.Cascade)]
        public QuoteProposalLink Proposal { get; set; }

        private class QuoteCostSheetLookup : LookupDefinitionGenerator<QuoteCostSheet, QuoteProposalCostSheet>
        {
            public override Filter<QuoteCostSheet> DefineFilter(QuoteProposalCostSheet[] items)
            {
                if (items == null || items.Length != 1)
                    return LookupFactory.DefineFilter<QuoteCostSheet>();
                return new Filter<QuoteCostSheet>(x => x.Quote.ID).IsEqualTo(items.First().Proposal.Quote.ID);
            }

            public override Columns<QuoteProposalCostSheet> DefineFilterColumns()
                => Columns.None<QuoteProposalCostSheet>().Add(x => x.Proposal.Quote.ID);
        }
        [LookupDefinition(typeof(QuoteCostSheetLookup))]
        [EntityRelationship(DeleteAction.Cascade)]
        public QuoteCostSheetLink CostSheet { get; set; }

        [IntegerEditor]
        public int Qty { get; set; }

        [CurrencyEditor(Editable = Editable.Hidden, Summary = Summary.Sum)]
        [Formula(typeof(QuoteProposalCostSheetExTax))]
        public double ExTax { get; set; }

        [CurrencyEditor(Editable = Editable.Hidden, Summary = Summary.Sum)]
        [Formula(typeof(QuoteProposalCostSheetTax))]
        public double Tax { get; set; }

        [CurrencyEditor(Visible = Visible.Default, Editable = Editable.Hidden, Summary = Summary.Sum)]
        [Formula(typeof(QuoteProposalCostSheetIncTax))]
        public double IncTax { get; set; }

        [NullEditor]
        public long Sequence { get; set; }
    }
}