using Spring.Objects.Factory.Config;
using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Reflection;
using Sleis.Infrastructure;

namespace Sleis.Utility
{
    public interface IPropertyPlaceholder
    {
        IDictionary<string, string> ExposedProps { get; }
        string Get(string key);
    }

    public class PropertyUtility : PropertyPlaceholderConfigurer, IPropertyPlaceholder
    {
        private IDictionary<string, string> _exposedProperties = new Dictionary<string, string>();

        public PropertyUtility()
            : base()
        {
            this.IgnoreResourceNotFound = false;
            this.IgnoreUnresolvablePlaceholders = false;
            this.EnvironmentVariableMode = EnvironmentVariableMode.Fallback;
        }

        protected override void ProcessProperties(IConfigurableListableObjectFactory factory,
                                                  NameValueCollection props)
        {

            base.ProcessProperties(factory, props);

            for (int i = 0; i < props.Count; ++i)
            {
                _exposedProperties.Add(props.GetKey(i), props.Get(i));
            }
        }

        public IDictionary<string, string> ExposedProps
        {
            get { return _exposedProperties; }
        }

        public string Get(string key)
        {
            if (_exposedProperties.ContainsKey(key))
            {
                return _exposedProperties[key];
            }
            else
            {
                return String.Empty;
            }
        }
    }
}