using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using Taloyhtio.GeneralApi.Common.Extensions;

namespace Taloyhtio.GeneralApi.Core.Services.Impl
{
    public class SettingsProvider : ISettingsProvider
    {
        private IConverter converter;

        public SettingsProvider(IConverter converter)
        {
            this.converter = converter;
        }

        public T Get<T>(string key)
        {
            string val = getVal(key);
            return this.converter.Convert<string, T>(val);
        }

        public IEnumerable<T> GetArray<T>(string key)
        {
            string val = getVal(key);
            if (string.IsNullOrEmpty(val))
            {
                return new List<T>();
            }

            var vals = val.Split(new[] {','}, StringSplitOptions.RemoveEmptyEntries);
            if (vals.IsNullOrEmpty())
            {
                return new List<T>();
            }

            var converted = vals.Select(c => this.converter.Convert<string, T>(c));
            return converted;
        }

        private string getVal(string key)
        {
            return ConfigurationManager.AppSettings[key];
        }
    }
}