using System.Collections.Generic;
using System.ComponentModel;
using System.Dynamic;

namespace JD.Guinness.WPF.Module.Model
{
    public sealed class CustomData : DynamicObject, INotifyPropertyChanged
    {
        private readonly Dictionary<string, string> _values;

        public IEnumerable<KeyValuePair<string, string>> Values => _values;

        public string this[string key]
        {
            get => _values.TryGetValue(key, out string value) ? value : string.Empty;
            set => _values[key] = value;
        }

        public CustomData()
        {
            _values = new Dictionary<string, string>();
        }

        public void Add(IEnumerable<KeyValuePair<string, string>> data)
        {
            foreach (KeyValuePair<string, string> pair in data)
            {
                this[pair.Key] = pair.Value;
            }
        }

        public void Remove(string key) => _values.Remove(key);

        public void ChangeKey(string oldKey, string newKey)
        {
            if (_values.TryGetValue(oldKey, out string value))
            {
                Remove(oldKey);
                _values[newKey] = value;
            }
        }

        public override bool TryGetMember(GetMemberBinder binder, out object result)
        {
            result = this[binder.Name];

            return true;
        }

        public override bool TrySetMember(SetMemberBinder binder, object value)
        {
            this[binder.Name] = value as string;
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(binder.Name));

            return true;
        }

        #region INotifyPropertyChanged

        public event PropertyChangedEventHandler PropertyChanged;

        #endregion
    }
}