using System.Collections.Generic;
using System.Linq;
using BS.Shared.DataContracts;

namespace BS.Shared.Core
{
    public class UserSettingsUtils
    {
        public static string CreateNewSettingValue(string settings, string key, string val)
        {
            if(string.IsNullOrEmpty(settings))
            {
                return key + "=" + val;
            }

            var keyValuePairs = settings.Split(';');
            var newValue = string.Empty;

            foreach(var pair in keyValuePairs)
            {
                if(pair.IndexOf(key + "=") != 0)
                {
                    if(newValue.Length > 0)
                    {
                        newValue += ";";
                    }

                    newValue += pair;
                }
            }

            if(newValue.Length > 0)
            {
                newValue += ";";
            }

            newValue += key + "=" + val;

            return newValue;
        }

        public static string GetSettingValue(string settings, string key)
        {
            if(!string.IsNullOrEmpty(settings))
            {
                if(settings.IndexOf(";") == -1 && settings.IndexOf("=") == -1)
                {
                    return settings;
                }

                var keyValuePairs = settings.Split(';');

                return (from pair in keyValuePairs select pair.Split('=') into keyValuePair where keyValuePair.Length == 2 where keyValuePair[0] == key select keyValuePair[1]).FirstOrDefault();
            }

            return null;
        }

        public static SettingsDC GetSettingValue(SettingsType pType, List<SettingsDC> pSettings)
        {
            return pSettings?.FirstOrDefault(s => s.Type == pType);
        }

        public static string GetSettingValue(SettingsType pType, string key, List<SettingsDC> pSettings)
        {
            var dc = GetSettingValue(pType, pSettings);

            return dc != null ? GetSettingValue(dc.Value, key) : null;
        }

        public static void SetSettingValue(SettingsType pType, string key, string val, List<SettingsDC> pSettings)
        {
            var dc = GetSettingValue(pType, pSettings);

            if(dc == null)
            {
                var newDc = new SettingsDC { Type = pType, Value = CreateNewSettingValue(string.Empty, key, val) };
                pSettings.Add(newDc);
            }
            else
            {
                dc.Value = CreateNewSettingValue(dc.Value, key, val);
            }
        }
    }
}