using System;
using System.Collections.Generic;
using System.Linq;
using Dalamud.Plugin.Services;
using Questionable.Data;
using Questionable.Model;
using Questionable.Model.Questing;

namespace Questionable.Validation.Validators;

internal sealed class GameSequenceCoverageValidator : IQuestValidator
{
	private readonly IDataManager _dataManager;

	public GameSequenceCoverageValidator(IDataManager dataManager)
	{
		_dataManager = dataManager;
	}

	public IEnumerable<ValidationIssue> Validate(Quest quest)
	{
		if (!(quest.Id is QuestId questId))
		{
			yield break;
		}
		HashSet<int> authored = ((IEnumerable<QuestSequence>)quest.Root.QuestSequence).Select((Func<QuestSequence, int>)((QuestSequence x) => x.Sequence)).ToHashSet();
		IEnumerable<int> enumerable = from seq in GameQuestSequences.GetCompletionSequences(_dataManager, questId)
			where !authored.Contains(seq)
			select seq;
		foreach (int item in enumerable)
		{
			yield return new ValidationIssue
			{
				PathType = EPathType.Quest,
				Id = quest.Id.ToString(),
				Location = SchemaValidationHelper.FormatQuestLocation((byte)item, null),
				Type = EIssueType.MissingPostInstanceSequence,
				Severity = EIssueSeverity.Warning,
				Description = $"The game uses sequence {item}, but the quest path doesn't define it. Add an empty " + "placeholder sequence (or steps, if the sequence requires player action)."
			};
		}
	}
}