using System.Collections.Generic;
using System.Linq;
using System.Numerics;
using Questionable.Controller.Utils;
using Questionable.Model;
using Questionable.Model.Questing;

namespace Questionable.Validation.Validators;

internal sealed class CompletionFlagsValidator : IQuestValidator
{
	public IEnumerable<ValidationIssue> Validate(Quest quest)
	{
		if (quest.Id.Value == 5149)
		{
			yield break;
		}
		foreach (QuestSequence sequence in quest.AllSequences())
		{
			List<long> mappedCompletionFlags = sequence.Steps.Select((QuestStep x) => QuestWorkUtils.HasCompletionFlags(x.CompletionQuestVariablesFlags) ? Enumerable.Range(0, 6).Select(delegate(int y)
			{
				QuestWorkValue questWorkValue = x.CompletionQuestVariablesFlags[y];
				return (long)((questWorkValue == null) ? 0 : BitOperations.RotateLeft((ulong)(questWorkValue.High.GetValueOrDefault() * 16 + questWorkValue.Low.GetValueOrDefault()), 8 * y));
			}).Sum() : 0).ToList();
			int i = 0;
			while (i < sequence.Steps.Count)
			{
				long flags = mappedCompletionFlags[i];
				if (flags != 0L && mappedCompletionFlags.Count((long x) => x == flags) >= 2)
				{
					yield return new ValidationIssue
					{
						ElementId = quest.Id,
						Sequence = sequence.Sequence,
						Step = i,
						Type = EIssueType.DuplicateCompletionFlags,
						Severity = EIssueSeverity.Error,
						Description = "Duplicate completion flags: " + string.Join(", ", sequence.Steps[i].CompletionQuestVariablesFlags)
					};
				}
				int num = i + 1;
				i = num;
			}
		}
	}
}