using System.Collections;
using WebmrAPI.Utils.Sequences;

namespace WebmrAPI.Utils
{
    public class Delay : BaseRandom, IComparable<Delay>
    {
        private int _min = 0;
        private int _max = 0;
        private bool _mutable = true;

        public readonly static Delay None = new Delay { _mutable = false };
        public readonly static Delay Random = new Delay { _mutable = false, Min = 50, Max = 250 };

        public int Value
        {
            set => _max = _min = value;
            get => (_max > _min) ? Generate(_min, _max) : _min;
        }
        public int Min
        {
            get => _min > _max ? _max : _min;
            set
            {
                if (!_mutable)
                {
                    throw new InvalidOperationException("Object is not mutable");
                }
                _min = value;
            }
        }
        public int Max
        {
            get => _max < _min ? _min : _max;
            set
            {
                if (!_mutable)
                {
                    throw new InvalidOperationException("Object is not mutable");
                }
                _max = value;
            }
        }

        async public Task WaitAsync()
        {
            await Task.Delay(Value);
        }
        public void Wait()
        {
            Thread.Sleep(Value);
        }
        public static bool operator ==(Delay? left, Delay? right)
        {
            if (left == null && right == null) return true;
            if (left == null || right == null) return false;

            return left._min == right._min && left._max == right._max;
        }

        public static bool operator !=(Delay? left, Delay? right)
        {
            return !(left == right);
        }
        public override bool Equals(object? obj)
        {
            if (obj == null || GetType() != obj.GetType())
            {
                return false;
            }

            Delay other = (Delay)obj;
            return this == other;
        }
        public override int GetHashCode()
        {
            return HashCode.Combine(_min, _max);
        }
        public static bool operator <(Delay left, Delay right)
        {
            if (left._min < right._min)
            {
                return true;
            }
            if (left._min == right._min && left._max < right._max)
            {
                return true;
            }
            return false;
        }
        public static bool operator >(Delay left, Delay right)
        {
            if (left._min > right._min)
            {
                return true;
            }
            if (left._min == right._min && left._max > right._max)
            {
                return true;
            }
            return false;
        }

        public static bool operator <=(Delay left, Delay right)
        {
            return left < right || left == right;
        }

        public static bool operator >=(Delay left, Delay right)
        {
            return left > right || left == right;
        }
        public int CompareTo(Delay? other)
        {
            if (other == null)
            {
                return 1;
            }

            int result = _min.CompareTo(other._min);
            if (result != 0)
            {
                return result;
            }

            return _max.CompareTo(other._max);
        }
    }

    public class DelayGenerator : ISequenceGenerator<Delay>
    {
        private ISequenceGenerator<int> _generator;

        public Delay Min { get => new Delay { Value = _generator.Min }; }
        public Delay Max { get => new Delay { Value = _generator.Max }; }
        public double Progress { get => _generator.Progress; }
        public double Step { get => _generator.Step; }
        public bool HasValues { get => _generator.HasValues; }

        public Delay Next()
        {
            if (!HasValues)
            {
                Reset();
            }
            return new Delay { Value = _generator.Next() };
        }

        public ISequenceGenerator<Delay> Reset()
        {
            _generator.Reset();
            return this;
        }

        public DelayGenerator(ISequenceGenerator<int> generator)
        {
            _generator = generator;
        }
        public IEnumerator<Delay> GetEnumerator()
        {
            while (HasValues)
            {
                yield return Next();
            }
        }
        IEnumerator IEnumerable.GetEnumerator()
        {
            return GetEnumerator();
        }
    }
}