using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using CzokoŚmieciarka.DataModels.Interfaces;

namespace CzokoŚmieciarka.DataModels.Models.Steps
{
    public class SpillStep : IStep
    {
        public SpillStep(IGarbageCollector garbageCollector, ADump dump, ITypeOfGarbage typeOfGarbage)
        {
            this._garbageCollector = garbageCollector;
            this._dump = dump;
            this._typeOfGarbage = typeOfGarbage;
        }

        private IGarbageCollector _garbageCollector;
        private ADump _dump;
        private ITypeOfGarbage _typeOfGarbage;

        public void Invoke()
        {
            if(_garbageCollector.Position != _dump.Localization)
                throw new WrongPositionException("Śmieciarka nie na terenie podanego wyspiska");
            
            if(_dump.TypeOfGarbage != _typeOfGarbage)
                throw new TrashContainerNotFound($"Wysypisko nie przyjmuje smieci typu {_typeOfGarbage.GarbageType}");

            if(_garbageCollector.TrashContainers.All(c => c.TypeOfGarbage != _typeOfGarbage))
                throw new TrashContainerNotFound($"Smieciarka nie ma pojemnika na {_typeOfGarbage.GarbageType}!");

            var garbage = _garbageCollector.TrashContainers.Where(t => t.TypeOfGarbage == _typeOfGarbage)
                .Select(t => t.TakeGarbage())
                .Aggregate((a, b) => a + b);

            _dump.AddGarbage(garbage);
        }
    }
}