using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using HarmonyLib;
using GameNetcodeStuff;
using System.Reflection;
using System.Reflection.Emit;
using BepInEx.Logging;
using UnityEngine;

namespace ScarletMansion.GamePatch {
  public class SpawnScrapInLevelPatch {

    [HarmonyTranspiler]
    [HarmonyPatch(typeof(RoundManager), "SpawnScrapInLevel")]
    public static IEnumerable<CodeInstruction> ConnectOverlappingDoorwaysPatch(IEnumerable<CodeInstruction> instructions){
      var variable = typeof(RoundManager).GetField("scrapAmountMultiplier", BindingFlags.Instance | BindingFlags.Public);

      var sequence = new InstructionSequence("scrap", false, "The Loot Multiplier config will not work.");
      sequence.AddBasicWithAlternateMethodName(OpCodes.Ldfld, variable, "GetScrapValueModifier");
      sequence.AddBasic(OpCodes.Mul);
      sequence.AddBasic(OpCodes.Conv_I4);

      foreach(var instruction in instructions){

        if (sequence.VerifyStage(instruction)){

          var method = typeof(SpawnScrapInLevelPatch).GetMethod("ModifyScrapCount", BindingFlags.Static | BindingFlags.Public);

          yield return new CodeInstruction(OpCodes.Call, method);
          yield return instruction;

          continue;
        }

        yield return instruction;
      }

      sequence.ReportComplete();
    }

    public static float ModifyScrapCount(float count){
      if (DunGenPatch.Patch.active == false) return count;
      return count * PluginConfig.Instance.dunGenLootMultiplierValue;
    }

  }
}