using System.Linq;

namespace BITKit
{
    public interface IObjectElement<TKey, TValue>
    {
        bool IsMatch(TKey[] key);
        TValue GetValue();
    }
    public interface IObjectMatcher<TKey, TValue>
    {
        bool TryMatch(out TValue value, TKey[] key);
    }
    [System.Serializable]
    public record ObjectElement<TKey, TValue> : IObjectElement<TKey, TValue>
    {
        public ObjectElement()
        {

        }
        public ObjectElement(TValue value, params TKey[] keys)
        {
            this.values = value;
            this.keys = keys;
        }
        public ObjectElement(TKey[] key, TValue value)
        {
            this.keys = key;
            this.values = value;
        }
        public string name;
        public TKey[] keys;
        public TValue values;
        public TValue GetValue() => values;
        public bool IsMatch(TKey[] key)
        {
            return MathE.Contains(key,keys);
        }
    }
    public class ObjectMatcher<TKey, TValue> : IObjectMatcher<TKey, TValue>
    {
        public IObjectElement<TKey, TValue>[] list;
        public void Add(IObjectElement<TKey, TValue> element)
        {
            var list = this.list.ToList();
            list.Add(element);
            this.list = list.ToArray();
        }
        public bool TryMatch(out TValue value, params TKey[] key)
        {
            var result = TryMatch(out TValue[] values, key);
            value = values.FirstOrDefault();
            return result;
        }
        public bool TryMatch(out TValue[] values, params TKey[] key)
        {
            values = list
            .Where(x => x.IsMatch(key))
            .Select(x => x.GetValue())
            .ToArray();

            return values is not null && values.Length > 0;
        }
    }
}