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

namespace Comal.Classes
{
    public class JobAssignmentCount : CoreAggregate<Job, Assignment, Guid>
    {
        public override Expression<Func<Assignment, Guid>> Aggregate => x => x.ID;

        public override AggregateCalculation Calculation => AggregateCalculation.Count;

        public override Dictionary<Expression<Func<Assignment, object>>, Expression<Func<Job, object>>> Links =>
            new Dictionary<Expression<Func<Assignment, object>>, Expression<Func<Job, object>>>()
            {
                { Assignment => Assignment.JobLink.ID, Job => Job.ID }
            };
    }

    public class JobOpenAssignmentCount : CoreAggregate<Job, Assignment, Guid>
    {
        public override Expression<Func<Assignment, Guid>> Aggregate => x => x.ID;

        public override AggregateCalculation Calculation => AggregateCalculation.Count;

        public override Dictionary<Expression<Func<Assignment, object>>, Expression<Func<Job, object>>> Links =>
            new Dictionary<Expression<Func<Assignment, object>>, Expression<Func<Job, object>>>()
            {
                { Assignment => Assignment.JobLink.ID, Job => Job.ID }
            };

        public override Filter<Assignment> Filter => new Filter<Assignment>(x => x.Completed).IsEqualTo(DateTime.MinValue);
    }
}