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

namespace Comal.Classes
{
    
    public class JobScopeInvoiceExTax : CoreAggregate<JobScope, InvoiceLine, double>
    {
        public override Expression<Func<InvoiceLine, double>> Aggregate => x => x.ExTax;

        public override AggregateCalculation Calculation => AggregateCalculation.Sum;

        public override Dictionary<Expression<Func<InvoiceLine, object>>, Expression<Func<JobScope, object>>> Links =>
            new Dictionary<Expression<Func<InvoiceLine, object>>, Expression<Func<JobScope, object>>>()
            {
                { InvoiceLine => InvoiceLine.Scope.ID, JobPrice => JobPrice.ID }
            };
    }

    public class JobScopeInvoiceTax : CoreAggregate<JobScope, InvoiceLine, double>
    {
        public override Expression<Func<InvoiceLine, double>> Aggregate => x => x.Tax;

        public override AggregateCalculation Calculation => AggregateCalculation.Sum;

        public override Dictionary<Expression<Func<InvoiceLine, object>>, Expression<Func<JobScope, object>>> Links =>
            new Dictionary<Expression<Func<InvoiceLine, object>>, Expression<Func<JobScope, object>>>()
            {
                { InvoiceLine => InvoiceLine.Scope.ID, JobPrice => JobPrice.ID }
            };
    }

    public class JobScopeInvoiceIncTax : CoreAggregate<JobScope, 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<JobScope, object>>> Links =>
            new Dictionary<Expression<Func<InvoiceLine, object>>, Expression<Func<JobScope, object>>>()
            {
                { InvoiceLine => InvoiceLine.Scope.ID, JobPrice => JobPrice.ID }
            };
    }

    public class JobScopeUninvoicedExTax : IFormula<JobScope, double>
    {
        public Expression<Func<JobScope, double>> Value => x => x.ExTax;
        public Expression<Func<JobScope, double>>[] Modifiers => new Expression<Func<JobScope, double>>[] { x => x.InvoiceExTax };
        public FormulaOperator Operator => FormulaOperator.Subtract;
        public FormulaType Type => FormulaType.Virtual;
    }

    public interface IJobScopedItem
    {
        JobLink JobLink { get; set; }
        JobScopeLink JobScope { get; set; }
    }

    [UserTracking(typeof(Job))]
    public class JobScope : Entity, IRemotable, IPersistent, ITaxable, IStringAutoIncrement<JobScope>, ILicense<ProjectManagementLicense>
    {
        [NullEditor]
        public InternalJobLink Job { get; set; }

        [EnumLookupEditor(typeof(JobScopeType), Visible = Visible.Default)]
        [EditorSequence(1)]
        public JobScopeType Type { get; set; } = JobScopeType.Variation;

        [CodeEditor(Visible = Visible.Default, Editable = Editable.Enabled)]
        [EditorSequence(2)]
        public string Number { get; set; }

        [MemoEditor(Visible = Visible.Default)]
        [EditorSequence(3)]
        public string Description { get; set; }
        
        [EditorSequence(4)]
        [TextBoxEditor]
        public string SourceRef{ get; set; } 
        
        private class JobScopeLookup : LookupDefinitionGenerator<JobScope, JobScope>
        {
            public override Filter<JobScope> DefineFilter(JobScope[] items)
            {
                if (items?.Any() != true)
                    return Filter.None<JobScope>();

                var data = Client.Query(
                    new Filter<JobScope>(x=>x.Job.ID).IsEqualTo(items.First().Job.ID),
                    Columns.None<JobScope>().Add(x => x.ID).Add(x => x.Parent.ID));

                var nodes = new CoreTreeNodes();
                nodes.Load<JobScope>(data, x => x.ID, x => x.Parent.ID);

                var exclusions = items.SelectMany(x => nodes.GetChildren(x.ID)).ToArray();
                var ids = exclusions.Select(x => x.ID).ToArray();
                return new Filter<JobScope>(x=>x.Job.ID).IsEqualTo(items.First().Job.ID).And(x => x.ID).NotInList(ids);
            }

            public override Columns<JobScope> DefineFilterColumns()
                => Columns.None<JobScope>().Add(x => x.ID).Add(x => x.Parent.ID).Add(x => x.Number);
        }
        
        [LookupDefinition(typeof(JobScopeLookup))]
        [EditorSequence(4)]
        public JobScopeLink Parent { get; set; }
        
        [CurrencyEditor(Summary = Summary.Sum, Visible = Visible.Default)]
        [EditorSequence(5)]
        public double ExTax { get; set; }

        [EditorSequence(6)]
        public TaxCodeLink TaxCode { get; set; }
        
        [CurrencyEditor(Summary = Summary.Sum, Visible = Visible.Optional)]
        [EditorSequence(7)]
        public double IncTax { get; set; }

        [EditorSequence(8)]
        public JobScopeStatusLink Status { get; set; }
        
        [CurrencyEditor(Visible = Visible.Default, Editable = Editable.Hidden, Summary = Summary.Sum)]
        [Aggregate(typeof(JobScopeInvoiceExTax))]
        public double InvoiceExTax { get; set; }

        [CurrencyEditor(Visible = Visible.Optional, Editable = Editable.Hidden, Summary = Summary.Sum)]
        [Aggregate(typeof(JobScopeInvoiceTax))]
        public double InvoiceTax { get; set; }

        [CurrencyEditor(Visible = Visible.Optional, Editable = Editable.Hidden, Summary = Summary.Sum)]
        [Aggregate(typeof(JobScopeInvoiceIncTax))]
        public double InvoiceIncTax { get; set; }

        [CurrencyEditor(Visible = Visible.Optional, Editable = Editable.Hidden, Summary = Summary.Sum)]
        [Formula(typeof(JobScopeUninvoicedExTax))]
        public double UninvoiceIncTax { get; set; }

        private class MaterialsExTaxFormula : ComplexFormulaGenerator<JobScope, double>
        {
            public override IComplexFormulaNode<JobScope, double> GetFormula() =>
                Formula(FormulaOperator.Subtract,
                    Aggregate<StockMovement>(AggregateCalculation.Sum, x => x.Property(x => x.Value))
                        .WithFilter(
                            new Filter<StockMovement>(x => x.Type).IsEqualTo(StockMovementType.Issue))
                        .WithLink(x => x.JobScope.ID, x => x.ID));
        }
        [CurrencyEditor(Visible = Visible.Optional, Editable = Editable.Hidden, Summary = Summary.Sum)]
        [ComplexFormula(typeof(MaterialsExTaxFormula))]
        public double MaterialsExTax { get; set; }

        private class UninvoicedMaterial : ComplexFormulaGenerator<JobScope, double>
        {
            public override IComplexFormulaNode<JobScope, double> GetFormula() =>
                Formula(FormulaOperator.Subtract,
                    Aggregate<StockMovement>(AggregateCalculation.Sum, x => x.Property(x => x.Value))
                        .WithFilter(
                            new Filter<StockMovement>(x => x.Invoice.ID).IsEqualTo(Guid.Empty)
                                .And(x => x.Type).IsEqualTo(StockMovementType.Issue))
                        .WithLink(x => x.JobScope.ID, x => x.ID));
        }
        [CurrencyEditor(Visible = Visible.Optional, Editable = Editable.Hidden, Summary = Summary.Sum)]
        [ComplexFormula(typeof(UninvoicedMaterial))]
        public double UninvoicedMaterialsExTax { get; set; }

        public Expression<Func<JobScope, string>> AutoIncrementField() => x => x.Number;
        public Filter<JobScope> AutoIncrementFilter() =>  new Filter<JobScope>(x => x.Job.ID).IsEqualTo(Job.ID);
        public String AutoIncrementPrefix() => "";
        public string AutoIncrementFormat() => "{0:D3}";
        
        [NullEditor]
        public double TaxRate { get; set; }

        [NullEditor(Summary = Summary.Sum, Visible = Visible.Optional)]
        public double Tax { get; set; }
        
        static JobScope()
        {
            LinkedProperties.Register<JobScope, TaxCodeLink, double>(x=>x.TaxCode, x => x.Rate, x => x.TaxRate);
        }

        public static void LinkScopeProperties<TScoped>() where TScoped : class, IJobScopedItem
        {
            LinkedProperties.Register<TScoped, JobScopeLink, Guid>(ass => ass.JobLink.DefaultScope, scope => scope.ID, ass => ass.JobScope.ID);
            LinkedProperties.Register<TScoped, JobScopeLink, String>(ass => ass.JobLink.DefaultScope, scope => scope.Number, ass => ass.JobScope.Number);
            LinkedProperties.Register<TScoped, JobScopeLink, String>(ass => ass.JobLink.DefaultScope, scope => scope.Description, ass => ass.JobScope.Description);
        }
    }
}