using System;
using System.Linq;
using Comal.Classes;
using InABox.Core;

namespace Comal.Stores
{
    internal class MeetingStore : BaseStore<Meeting>
    {

        private void UpdateAssignments(Meeting meeting)
        {
            bool needsupdate = 
                meeting.HasOriginalValue(x => x.Date)
               || meeting.HasOriginalValue(x => x.Time.Start)
                || meeting.HasOriginalValue(x => x.Time.Duration)
                || meeting.HasOriginalValue(x => x.Time.Finish)
               || meeting.HasOriginalValue(x => x.Title)
               || meeting.HasOriginalValue(x => x.Description)
               || meeting.HasOriginalValue(x => x.Activity.ID);

            if (!needsupdate)
                return;
            
            var assignments = Provider.Query<Assignment>(
                new Filter<Assignment>(x=>x.Meeting.Link.ID).IsEqualTo(meeting.ID),
                new Columns<Assignment>(x=>x.ID)
                    .Add(x=>x.Title)
                    .Add(x=>x.Description)
                    .Add(x=>x.Date)
                    .Add(x=>x.Booked.Start)
                    .Add(x=>x.Booked.Finish)
                    .Add(x=>x.Booked.Duration)
                    .Add(x=>x.ActivityLink.ID)
            ).Rows.Select(x=>x.ToObject<Assignment>()).ToArray();

            foreach (var assignment in assignments)
            {
                assignment.Date = meeting.Date;
                assignment.Booked.Start = meeting.Time.Start;
                assignment.Booked.Finish = meeting.Time.Duration;
                assignment.Booked.Finish = meeting.Time.Finish;
                assignment.ActivityLink.ID = meeting.Activity.ID;
                assignment.Title = meeting.Title;
                assignment.Description = meeting.Description;
            }

            var updates = assignments.Where(x => x.IsChanged()).ToArray();
            if (updates.Any())
                Provider.Save(updates);

        }
        
        protected override void AfterSave(Meeting entity)
        {
            base.AfterSave(entity);
            UpdateAssignments(entity);
        }
        
    }
}