using System;
using System.Reflection;
using HarmonyLib;

namespace undead_universal_patch.Patches
{
    [HarmonyPatch]
    class UWRPatchNoArg
    {
        const string TargetTypeName = "UnityEngine.Networking.UnityWebRequest";
        const string Description = "Legacy UnityWebRequest URL rewrite patch";
        const string UWRParams = "(NoArgs)";
        static readonly Type targetType = AccessTools.TypeByName(TargetTypeName);

        public static bool Prepare()
        {
            if (GenericConfig.IsNameserver.Value) return false;
            if (targetType == null)
            {
                Plugin.Log.LogWarning($"'{Description}' disabled. The type for this patch was not found.");
                return false;
            }
            if (GenericConfig.IsNameserver.Value)
            {
                Plugin.Log.LogInfo($"'{Description}' disabled. GenericConfig.IsNameserver was set.");
                return false;
            }

            Plugin.Log.LogInfo($"'{Description}' succeeded validation.");
            return true;
        }

        static MethodBase TargetMethod()
        {
            return AccessTools.Constructor(targetType, []);
        }

        [HarmonyPostfix]
        static void Postfix(object __instance) => InPostfix(__instance, UWRParams);

        public static void InPostfix(object __instance, string UWRParams)
        {
            var urlProperty = AccessTools.Property(__instance.GetType(), "url");
            if (urlProperty == null)
            {
                Plugin.Log.LogWarning($"UWR {UWRParams} Prefix could not find the url field!");
                return;
            }

            var targetUrl = (string)urlProperty.GetValue(__instance, null);
            if (GenericConfig.LogAllRequests.Value) Plugin.Log.LogDebug($"UWR {UWRParams} Request URL: {targetUrl}");

            urlProperty.SetValue(__instance, PatchUtils.RewriteUrlForGameserver(targetUrl).ToString(), null);
            targetUrl = (string)urlProperty.GetValue(__instance, null);
            if (GenericConfig.LogAllRequests.Value) Plugin.Log.LogDebug($"UWR {UWRParams} Request URL (Rewritten): {targetUrl}");
        }
    }
}