using System;
using System.Collections.Generic;
using Newtonsoft.Json;

namespace SpectacleTransformer {

    public class LingvaTranslationRequest : HttpTranslationRequest {
        public LingvaTranslationRequest(Uri InstanceUri, Language Source, Language Target, string Text) : base(InstanceUri, Source, Target, Text) { }

        public override Uri Url {
            get {
                return new Uri(InstanceUri, String.Format(
                    "api/v1/{0}/{1}/{2}",
                    Uri.EscapeUriString(Source.SourceName),
                    Uri.EscapeUriString(Target.TargetName),
                    Uri.EscapeUriString(Text)
                ));
            }
        }

        public static new bool MatchesInstance(Uri InstanceUri) {
            return GoogleTranslationRequest.GoogleTranslateUrl.Host != InstanceUri.Host;
        }

        public override string DecodeResponse(string responseBody) {
            string translation = null;
            try {
                JsonConvert.DeserializeObject<Dictionary<string, string>>(responseBody).TryGetValue("translation", out translation);
            } catch (Exception) { }
            return translation;
        }

        public override string DecodeErrorResponse(string responseBody) {
            string errorMessage;
            try {
                if (!JsonConvert.DeserializeObject<Dictionary<string, string>>(responseBody).TryGetValue("errorMsg", out errorMessage)) {
                    return responseBody;
                }
                return errorMessage;
            } catch (Exception) {
                return responseBody;
            }
        }
    }
}