using System.Collections.Generic;
using System.Linq;
using System.Numerics;
using Dalamud.Plugin.Services;
using LLib.Shop.Model;
using Lumina.Excel;
using Lumina.Excel.Sheets;

namespace LLib.Shop.Searchers;

internal sealed class SpecialShopSearcher
{
	private const uint SpecialShopHandlerType = 27u;

	private static readonly Dictionary<uint, uint> SpecialCurrencies = new Dictionary<uint, uint>
	{
		{ 1u, 28u },
		{ 2u, 33913u },
		{ 4u, 33914u },
		{ 6u, 41784u },
		{ 7u, 41785u }
	};

	private readonly IDataManager _dataManager;

	private readonly NpcPositionCache _positionCache;

	private readonly uint[] _tomestoneItemIds;

	public SpecialShopSearcher(IDataManager dataManager, NpcPositionCache positionCache)
	{
		_dataManager = dataManager;
		_positionCache = positionCache;
		_tomestoneItemIds = (from t in dataManager.GetExcelSheet<TomestonesItem>()
			where t.Tomestones.RowId != 0
			orderby t.Tomestones.RowId
			select t.Item.RowId).ToArray();
	}

	public List<ShopSearchResult> Search(uint itemId)
	{
		List<ShopSearchResult> list = new List<ShopSearchResult>();
		ExcelSheet<ENpcBase> excelSheet = _dataManager.GetExcelSheet<ENpcBase>();
		ExcelSheet<SpecialShop> excelSheet2 = _dataManager.GetExcelSheet<SpecialShop>();
		foreach (ENpcBase item in excelSheet)
		{
			if (item.RowId == 0)
			{
				continue;
			}
			(ushort, Vector3)? position = _positionCache.GetPosition(item.RowId);
			if (!position.HasValue)
			{
				continue;
			}
			(ushort, Vector3) valueOrDefault = position.GetValueOrDefault();
			int num = 0;
			foreach (RowRef eNpcDatum in item.ENpcData)
			{
				if (eNpcDatum.RowId >> 16 != 27)
				{
					continue;
				}
				uint rowId = eNpcDatum.RowId;
				if (!excelSheet2.TryGetRow(rowId, out var row))
				{
					num++;
					continue;
				}
				bool flag = false;
				uint currencyItemId = 0u;
				uint price = 0u;
				for (int i = 0; i < row.Item.Count; i++)
				{
					SpecialShop.ItemStruct itemStruct = row.Item[i];
					for (int j = 0; j < itemStruct.ReceiveItems.Count; j++)
					{
						if (itemStruct.ReceiveItems[j].Item.RowId != itemId)
						{
							continue;
						}
						flag = true;
						for (int k = 0; k < itemStruct.ItemCosts.Count; k++)
						{
							SpecialShop.ItemStruct.ItemCostsStruct itemCostsStruct = itemStruct.ItemCosts[k];
							if (itemCostsStruct.ItemCost.RowId != 0)
							{
								currencyItemId = ConvertCurrencyItemId(itemCostsStruct.ItemCost.RowId, in row);
								price = itemCostsStruct.CurrencyCost;
								break;
							}
						}
						break;
					}
					if (flag)
					{
						break;
					}
				}
				if (flag)
				{
					list.Add(new ShopSearchResult(rowId, item.RowId, valueOrDefault.Item1, valueOrDefault.Item2, EShopType.SpecialShop, price, currencyItemId, num));
				}
				num++;
			}
		}
		return list;
	}

	private uint ConvertCurrencyItemId(uint costItemId, in SpecialShop shop)
	{
		if (costItemId == 0 || costItemId >= 8)
		{
			return costItemId;
		}
		ushort num = shop.UseCurrencyType;
		uint rowId = shop.RowId;
		if (rowId - 1770637 <= 1)
		{
			num = 16;
		}
		return num switch
		{
			16 => SpecialCurrencies.GetValueOrDefault(costItemId, costItemId), 
			8 => 1u, 
			4 => (costItemId <= _tomestoneItemIds.Length) ? _tomestoneItemIds[costItemId - 1] : costItemId, 
			_ => costItemId, 
		};
	}
}