using JetBrains.Annotations;
using System;
using System.Collections;
using System.Collections.Generic;

namespace BEG.Localization
{
    public class LocalizationContext
    {
        public interface IParam
        {
            [PublicAPI] public event Action OnValueChanged;
        }
        
        public class Param<T>: IParam
        {
            public event Action OnValueChanged;

            [PublicAPI]
            public T Value
            {
                get => value;
                set
                {
                    OnValueChanged?.Invoke();
                    this.value = value;
                }
            }
            
            [NotNull] private readonly Func<T, string> formatter;
            private T value;
            
            public Param(T value, Func<T, string> formatter)
            {
                this.formatter = formatter ?? (v => v.ToString());
                Value = value;
            }

            public override string ToString() => formatter(value);
        }
        
        private Dictionary<string, IParam> parameters = new ();

        public void SetParam(string name, IParam param)
        {
            if (parameters.ContainsKey(name))
                parameters[name] = param;
            else
                parameters.Add(name, param);
        }

        public void RemoveParam(string name) => parameters.Remove(name);
        public IParam GetParam(string name) => parameters[name];

        public void ClearParams() => parameters.Clear();

        public IParam this[string name]
        {
            get => GetParam(name);
            set => SetParam(name, value);
        }
    }
}