using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.Extensions.Logging;
using Questionable.Model;
using Questionable.Model.Questing;

namespace Questionable.Controller.Utils;

internal static class QuestWorkUtils
{
	public static bool HasCompletionFlags(IList<QuestWorkValue?> completionQuestVariablesFlags)
	{
		if (completionQuestVariablesFlags.Count == 6)
		{
			return completionQuestVariablesFlags.Any((QuestWorkValue x) => x != null && (x.High != 0 || x.Low != 0));
		}
		return false;
	}

	public static bool MatchesQuestWork(IList<QuestWorkValue?> completionQuestVariablesFlags, QuestProgressInfo questProgressInfo)
	{
		if (!HasCompletionFlags(completionQuestVariablesFlags) || questProgressInfo.Variables.Count != 6)
		{
			return false;
		}
		for (int i = 0; i < questProgressInfo.Variables.Count; i++)
		{
			QuestWorkValue questWorkValue = completionQuestVariablesFlags[i];
			if (questWorkValue == null)
			{
				continue;
			}
			EQuestWorkMode mode = questWorkValue.Mode;
			byte b = (byte)(questProgressInfo.Variables[i] >> 4);
			byte b2 = (byte)(questProgressInfo.Variables[i] & 0xF);
			byte? high = questWorkValue.High;
			byte? low = questWorkValue.Low;
			byte valueOrDefault = high.GetValueOrDefault();
			byte valueOrDefault2 = low.GetValueOrDefault();
			switch (mode)
			{
			case EQuestWorkMode.Exact:
				if (high.HasValue && b != valueOrDefault)
				{
					return false;
				}
				if (low.HasValue && b2 != valueOrDefault2)
				{
					return false;
				}
				break;
			case EQuestWorkMode.Bitwise:
				if (high.HasValue && (b & high) != valueOrDefault)
				{
					return false;
				}
				if (low.HasValue && (b2 & low) != valueOrDefault2)
				{
					return false;
				}
				break;
			default:
				throw new InvalidOperationException($"Unknown qw mode {mode}");
			}
		}
		return true;
	}

	public static bool MatchesRequiredQuestWorkConfig(List<List<QuestWorkValue>?> requiredQuestVariables, QuestProgressInfo questWork, ILogger logger)
	{
		if (requiredQuestVariables.Count != 6 || requiredQuestVariables.All((List<QuestWorkValue> x) => x == null || x.Count == 0))
		{
			logger.LogDebug("No RequiredQW defined");
			return true;
		}
		for (int num = 0; num < 6; num++)
		{
			if (requiredQuestVariables[num] == null)
			{
				logger.LogDebug("No RequiredQW {Index} defined", num);
				continue;
			}
			byte b = (byte)(questWork.Variables[num] >> 4);
			byte b2 = (byte)(questWork.Variables[num] & 0xF);
			foreach (QuestWorkValue item in requiredQuestVariables[num])
			{
				logger.LogDebug("H: {ExpectedHigh} - {ActualHigh}, L: {ExpectedLow} - {ActualLow}", item.High, b, item.Low, b2);
				if ((!item.High.HasValue || item.High == b) && (!item.Low.HasValue || item.Low == b2))
				{
					return true;
				}
			}
		}
		logger.LogInformation("Should execute step");
		return false;
	}
}