using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;

using Com.Piwigo.Lib.DTO.Helper;
using System.Xml;
using Com.Piwigo.Lib.DTO;

namespace Com.Piwigo.Lib.Proxy.Helper
{
    internal static class PwgProxyReponseHelper
    {
        internal static void buildDicFieldFromArray<T>(List<T> values, String paramName, ref Dictionary<String, String> dcFields)
        {
            String FormatString = String.Empty;
            String ParamValue = String.Empty;

            Boolean firstOcc = true;
            if (values != null)
            {
                foreach (T occurance in values)
                {
                    if (firstOcc == true)
                    {
                        firstOcc = false;
                        FormatString = "{0}";
                    }
                    else
                    {
                        FormatString = ",{0}";
                    }

                    ParamValue += String.Format(FormatString,GetString(occurance));
                }

                dcFields.Add(paramName, ParamValue);
            }
        }

        internal static void buildDicFieldFromValue<T>(Nullable<T> nullableValue, String paramName, ref Dictionary<String, String> dcFields) where T : struct
        {
            if (nullableValue.HasValue)
            {
                buildDicFieldFromValue<T>(nullableValue.Value, paramName, ref dcFields);
            }
        }

        internal static void buildDicFieldFromValue<T>(T value, String paramName, ref Dictionary<String, String> dcFields)
        {
            String FormatString = String.Empty;
            String ParamValue = String.Empty;

            FormatString = "{0}";

            ParamValue = GetString(value);

            dcFields.Add(paramName, ParamValue);
        }

        internal static void buildQueryFromArray<T>(List<T> values, String paramName, ref Boolean firstOcc, StringBuilder queryStringBuilder)
        {
            String FormatString = String.Empty;
            if (values != null)
            {
                if (values.Count == 1)
                {
                    FormatString = "{0}={1}";
                }
                else
                {
                    FormatString = "{0}[]={1}";
                }
                if (firstOcc != true)
                {
                    FormatString = String.Format("&{0}", FormatString);
                }

                foreach (T occurance in values)
                {
                    queryStringBuilder.AppendFormat(FormatString, paramName, Uri.EscapeUriString(GetString(occurance)));
                    firstOcc = false;
                }

            }
        }

        internal static void buildQueryFromValue<T>(Nullable<T> nullableValue, String paramName, ref Boolean firstOcc, StringBuilder queryStringBuilder) where T : struct
        {
            if (nullableValue.HasValue)
            {
                buildQueryFromValue<T>(nullableValue.Value, paramName, ref firstOcc, queryStringBuilder);
            }
        }

        internal static void buildQueryFromValue<T>(T value, String paramName, ref Boolean firstOcc, StringBuilder queryStringBuilder)
        {
            String FormatString = String.Empty;
            String ParamValue = String.Empty;
            
                FormatString = "{0}={1}";
                if (firstOcc != true)
                {
                    FormatString = String.Format("&{0}", FormatString);
                }

                ParamValue = Uri.EscapeUriString(GetString(value));
                
                queryStringBuilder.AppendFormat(FormatString, paramName, ParamValue);
                
                firstOcc = false;
        }

        public static String GetString<T>(T value)
        {
            String strRet = String.Empty;
            if (value is String)
            {
                strRet = (value as String);
            }
            else if (typeof(T).IsEnum)
            {
                strRet = PwgEnumHelper<T>.StringValueOf(value);
            }
            else if (value is PwgTag)
            {

                strRet = (value as PwgTag).Name;
            }
            else
            {

                strRet = (value as Object).ToString().ToLowerInvariant();
            }

            return strRet;
        }
    }
}