using System.Linq;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Networking;

namespace Proyecto26.Common
{
    public static class Extensions
    {
        /// <summary>
        /// Create an object with the response of the server
        /// </summary>
        /// <param name="request">An UnityWebRequest object.</param>
        /// <returns>An object with the response.</returns>
        public static ResponseHelper CreateWebResponse(this UnityWebRequest request)
        {
            return new ResponseHelper(request);
        }

        /// <summary>
        /// Validate if the request is OK with the current options
        /// </summary>
        /// <param name="request">An UnityWebRequest object.</param>
        /// <param name="options">The options of the request.</param>
        /// <returns>A boolean that indicates if the request is valid.</returns>
        public static bool IsValidRequest(this UnityWebRequest request, RequestHelper options)
        {
            return request.isDone &&
            !request.isNetworkError &&
            (
                !request.isHttpError || options.IgnoreHttpException
            );
        }

        /// <summary>
        /// Escapes characters in a string to ensure they are URL-friendly
        /// </summary>
        /// <param name="queryParam">A query string param</param>
        /// <returns>Escaped query string param.</returns>
        public static string EscapeURL(this string queryParam)
        {
#if UNITY_2018_3_OR_NEWER
            return UnityWebRequest.EscapeURL(queryParam);
#else
            return WWW.EscapeURL(queryParam);
#endif
        }

        /// <summary>
        /// Generate the url and escape params
        /// </summary>
        /// <param name="uri">The URI of the resource to retrieve via HTTP.</param>
        /// <param name="queryParams">Query string parameters.</param>
        /// <returns>The full url with query string params.</returns>
        public static string BuildUrl(this string uri, Dictionary<string, string> queryParams)
        {
            var url = uri;
            var defaultParams = RestClient.DefaultRequestParams;
            if (defaultParams.Any() || queryParams.Any())
            {
                var urlParamKeys = queryParams.Keys;
                url += (url.Contains("?") ? "&" : "?") + string.Join("&",
                    queryParams
                    .Concat(
                        defaultParams
                        .Where(p => !urlParamKeys.Contains(p.Key))
                    )
                    .Select(p => string.Format("{0}={1}", p.Key, p.Value.EscapeURL()))
                    .ToArray()
                );
            }
            return url;
        }
    }
}