using System.Collections.Generic;
using Microsoft.Extensions.Logging;
using Questionable.Controller.CustomDelivery;
using Questionable.Controller.Steps.Common;
using Questionable.Model;
using Questionable.Model.Questing;
using Questionable.Navigation;

namespace Questionable.Controller.Steps.Interactions;

internal static class AutoVendorPurchase
{
	internal sealed class Factory(VendorResolverService vendorResolver, SmartNavRouteEnqueuer routeEnqueuer, ILogger<Factory> logger) : ITaskFactory
	{
		public IEnumerable<ITask> CreateAllTasks(Quest quest, QuestSequence sequence, QuestStep step)
		{
			if (step.InteractionType != EInteractionType.PurchaseItem || step.DataId.HasValue || !step.ItemId.HasValue)
			{
				yield break;
			}
			VendorResolverService.VendorInfo? vendor = vendorResolver.ResolveVendor(step.ItemId.Value);
			if (!vendor.HasValue)
			{
				logger.LogWarning("No vendor with a known location sells item {ItemId}; cannot auto-purchase", step.ItemId);
				yield break;
			}
			int quantity = step.ItemCount ?? 1;
			foreach (ITask item in routeEnqueuer.BuildRoutedTasks(vendor.Value.TerritoryId, vendor.Value.Position))
			{
				yield return item;
			}
			yield return new Mount.UnmountTask();
			yield return new VendorPurchaseTask(vendor.Value.VendorNpcId, new global::_003C_003Ez__ReadOnlySingleElementList<VendorPurchaseTask.PurchaseItem>(new VendorPurchaseTask.PurchaseItem(step.ItemId.Value, quantity)), vendor.Value.DialogOptionIndex);
		}
	}
}