using System.Collections.Generic;
using System.Numerics;
using Dalamud.Plugin.Services;
using LLib.GameData;
using LLib.Shop;
using LLib.Shop.Model;
using Lumina.Excel.Sheets;
using Microsoft.Extensions.Logging;

namespace Questionable.Controller.CustomDelivery;

internal sealed class VendorResolverService(IDataManager dataManager, VendorResolver vendorResolver, NpcPositionCache npcPositionCache, ILogger<VendorResolverService> logger)
{
	internal readonly record struct IngredientInfo(uint ItemId, int CountPerCraft);

	internal readonly record struct RecipeInfo(uint RecipeId, uint CraftedItemId, IReadOnlyList<IngredientInfo> Ingredients, EClassJob CraftingClass);

	internal readonly record struct VendorInfo(uint ShopId, uint VendorNpcId, ushort TerritoryId, Vector3 Position, int DialogOptionIndex);

	public RecipeInfo? ResolveRecipe(uint craftedItemId, EClassJob? preferredJob = null)
	{
		if (!dataManager.GetExcelSheet<RecipeLookup>().TryGetRow(craftedItemId, out var row))
		{
			logger.LogDebug("No RecipeLookup row for item {ItemId}", craftedItemId);
			return null;
		}
		(EClassJob, uint)[] array = new(EClassJob, uint)[8]
		{
			(EClassJob.Carpenter, row.CRP.RowId),
			(EClassJob.Blacksmith, row.BSM.RowId),
			(EClassJob.Armorer, row.ARM.RowId),
			(EClassJob.Goldsmith, row.GSM.RowId),
			(EClassJob.Leatherworker, row.LTW.RowId),
			(EClassJob.Weaver, row.WVR.RowId),
			(EClassJob.Alchemist, row.ALC.RowId),
			(EClassJob.Culinarian, row.CUL.RowId)
		};
		(EClassJob, uint)[] array2;
		if (preferredJob.HasValue)
		{
			array2 = array;
			for (int i = 0; i < array2.Length; i++)
			{
				var (eClassJob, num) = array2[i];
				if (eClassJob == preferredJob.Value && num != 0)
				{
					if (!dataManager.GetExcelSheet<Recipe>().TryGetRow(num, out var row2))
					{
						break;
					}
					List<IngredientInfo> list = CollectIngredients(row2);
					if (list.Count == 0)
					{
						break;
					}
					logger.LogDebug("Resolved recipe {RecipeId} ({ClassJob}) for item {ItemId} via preferred job: {Count} ingredient(s)", num, eClassJob, craftedItemId, list.Count);
					return new RecipeInfo(num, craftedItemId, list, eClassJob);
				}
			}
		}
		array2 = array;
		for (int i = 0; i < array2.Length; i++)
		{
			var (eClassJob2, num2) = array2[i];
			if (num2 != 0 && dataManager.GetExcelSheet<Recipe>().TryGetRow(num2, out var row3))
			{
				List<IngredientInfo> list2 = CollectIngredients(row3);
				if (list2.Count != 0)
				{
					logger.LogDebug("Resolved recipe {RecipeId} ({ClassJob}) for item {ItemId}: {Count} ingredient(s)", num2, eClassJob2, craftedItemId, list2.Count);
					return new RecipeInfo(num2, craftedItemId, list2, eClassJob2);
				}
			}
		}
		logger.LogDebug("No valid recipe found for item {ItemId}", craftedItemId);
		return null;
	}

	public VendorInfo? ResolveVendor(uint ingredientId)
	{
		if (!npcPositionCache.IsBuilt)
		{
			logger.LogWarning("NPC position cache not built yet, cannot resolve a vendor for ingredient {IngredientId}", ingredientId);
			return null;
		}
		ShopSearchResult shopSearchResult = vendorResolver.FindGilVendor(ingredientId);
		if (shopSearchResult == null)
		{
			logger.LogDebug("No vendor with known position found for ingredient {IngredientId}", ingredientId);
			return null;
		}
		logger.LogDebug("Found vendor NPC {NpcId} selling ingredient {IngredientId} at shop {ShopId} in territory {TerritoryId} (dialog option {DialogOption})", shopSearchResult.NpcId, ingredientId, shopSearchResult.ShopId, shopSearchResult.TerritoryId, shopSearchResult.DialogOptionIndex);
		return new VendorInfo(shopSearchResult.ShopId, shopSearchResult.NpcId, shopSearchResult.TerritoryId, shopSearchResult.NpcPosition, shopSearchResult.DialogOptionIndex);
	}

	private static List<IngredientInfo> CollectIngredients(Recipe recipe)
	{
		List<IngredientInfo> list = new List<IngredientInfo>();
		for (int i = 0; i < recipe.Ingredient.Count; i++)
		{
			uint rowId = recipe.Ingredient[i].RowId;
			int num = recipe.AmountIngredient[i];
			if (rowId != 0 && num > 0)
			{
				list.Add(new IngredientInfo(rowId, num));
			}
		}
		return list;
	}
}