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

namespace Comal.Classes
{

    [UserTracking(typeof(Quote))]
    public class QuoteCostSheet : Entity, IRemotable, IPersistent, IQuoteCostSheet, ILicense<QuotesManagementLicense>, 
        IStringAutoIncrement<QuoteCostSheet>
    {
        
        [NullEditor]
        public long Sequence { get; set; }
        
        #region IAutoIncrement
        
        public Expression<Func<QuoteCostSheet, String>> AutoIncrementField() => x => x.Number;
        public String AutoIncrementPrefix() => "QC";
        public virtual string AutoIncrementFormat() => "{0:D6}";
        public Filter<QuoteCostSheet> AutoIncrementFilter() => null;
        public int AutoIncrementDefault() => 1;
        
        #endregion
        
        [NullEditor]
        [Obsolete("Replaced with Parent")]
        [EntityRelationship(DeleteAction.Cascade)]
        public QuoteLink Quote { get; set; }
        
        [CodeEditor]
        [EditorSequence(1)]
        public string Number { get; set; }
        
        [TextBoxEditor(Visible = Visible.Default)]
        [EditorSequence(2)]
        public string Description { get; set; }
        
        private class QuoteCostSheetFormLookup : LookupDefinitionGenerator<QuoteForm, QuoteCostSheet>
        {
            public override Filter<QuoteForm> DefineFilter(QuoteCostSheet[] items)
            {
                if (items?.Any() != true)
                    return LookupFactory.DefineFilter<QuoteForm>();
                return new Filter<QuoteForm>(x => x.Parent.ID).IsEqualTo(items.First().Quote.ID);
            }

            public override Columns<QuoteCostSheet> DefineFilterColumns()
                => new Columns<QuoteCostSheet>(ColumnTypeFlags.Required);
        }
        [LookupDefinition(typeof(QuoteCostSheetFormLookup))]
        [EditorSequence(3)]
        public QuoteFormLink Form { get; set; }
        
        [EntityRelationship(DeleteAction.SetNull)]
        [EditorSequence(4)]
        public CostSheetLink CostSheet { get; set; }

        [EditorSequence(5)] 
        [CurrencyEditor]
        public double Price { get; set; }
        
        [EditorSequence(6)] 
        public TaxCodeLink TaxCode { get; set; }

        private class ExTaxFormula : ComplexFormulaGenerator<QuoteCostSheet, double>
        {
            public override IComplexFormulaNode<QuoteCostSheet, double> GetFormula() => If<double>(
                    x => x.Property(x => x.Price),
                    Condition.Equals,
                    x => Constant(0.0))
                .Then(Aggregate<QuoteCostSheetItem>(AggregateCalculation.Sum, x => x.Property(x => x.ExTax)).WithLink(x => x.CostSheet.ID, x => x.ID))
                .Else(Property(x => x.Price));
        }
        
        [CurrencyEditor(Visible = Visible.Default, Editable = Editable.Hidden)]
        [ComplexFormula(typeof(ExTaxFormula))]
        public double ExTax { get; set; }

        private class TaxFormula : ComplexFormulaGenerator<QuoteCostSheet, double>
        {
            public override IComplexFormulaNode<QuoteCostSheet, double> GetFormula() => If<double>(
                    x => x.Property(x => x.Price),
                    Condition.Equals,
                    x => x.Constant(0.0))
                .Then(Aggregate<QuoteCostSheetItem>(AggregateCalculation.Sum, x => x.Property(x => x.Tax)).WithLink(x => x.CostSheet.ID, x => x.ID))
                .Else(Formula(FormulaOperator.Multiply, Property(x => x.Price), Property(x => x.TaxCode.Rate), Constant(0.01)));
        }
        
        [CurrencyEditor(Visible = Visible.Optional, Editable = Editable.Hidden)]
        [ComplexFormula(typeof(TaxFormula))]
        public double Tax { get; set; }

        private class IncTaxFormula : ComplexFormulaGenerator<QuoteCostSheet, double>
        {
            public override IComplexFormulaNode<QuoteCostSheet, double> GetFormula() => If<double>(
                    x => x.Property(x => x.Price),
                    Condition.Equals,
                    x => x.Constant(0.0))
                .Then(Aggregate<QuoteCostSheetItem>(AggregateCalculation.Sum, x => x.Property(x => x.IncTax)).WithLink(x => x.CostSheet.ID, x => x.ID))
                .Else(Formula(FormulaOperator.Add, Property(x => x.Price), Property(x => x.Tax)));
        }
        
        [CurrencyEditor(Visible = Visible.Optional, Editable = Editable.Hidden)]
        [ComplexFormula(typeof(IncTaxFormula))]
        public double IncTax { get; set; }
        
     }
}