63 lines
2.7 KiB
C#
63 lines
2.7 KiB
C#
using LctMonolith.Models.Database;
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using Microsoft.EntityFrameworkCore;
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using Serilog;
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using System.Text.Json;
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using LctMonolith.Database.UnitOfWork;
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using LctMonolith.Services.Contracts;
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namespace LctMonolith.Services;
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/// <summary>
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/// Store purchase operations and inventory management.
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/// </summary>
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public class StoreService : IStoreService
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{
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private readonly IUnitOfWork _uow;
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public StoreService(IUnitOfWork uow)
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{
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_uow = uow;
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}
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public async Task<IEnumerable<StoreItem>> GetActiveItemsAsync(CancellationToken ct = default)
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{
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try { return await _uow.StoreItems.Query(i => i.IsActive).ToListAsync(ct); }
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catch (Exception ex) { Log.Error(ex, "GetActiveItemsAsync failed"); throw; }
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}
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public async Task<UserInventoryItem> PurchaseAsync(Guid userId, Guid itemId, int quantity, CancellationToken ct = default)
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{
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try
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{
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if (quantity <= 0) throw new ArgumentOutOfRangeException(nameof(quantity));
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var player = await _uow.Players.Query(p => p.UserId == userId).FirstOrDefaultAsync(ct) ?? throw new KeyNotFoundException("Player not found for user");
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var item = await _uow.StoreItems.Query(i => i.Id == itemId && i.IsActive).FirstOrDefaultAsync(ct) ?? throw new KeyNotFoundException("Item not found or inactive");
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var totalPrice = item.Price * quantity;
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if (player.Mana < totalPrice) throw new InvalidOperationException("Insufficient mana");
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if (item.Stock.HasValue && item.Stock.Value < quantity) throw new InvalidOperationException("Insufficient stock");
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player.Mana -= totalPrice;
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if (item.Stock.HasValue) item.Stock -= quantity;
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var inv = await _uow.UserInventoryItems.FindAsync(userId, itemId);
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if (inv == null)
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{
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inv = new UserInventoryItem { UserId = userId, StoreItemId = itemId, Quantity = quantity, AcquiredAt = DateTime.UtcNow };
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await _uow.UserInventoryItems.AddAsync(inv, ct);
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}
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else inv.Quantity += quantity;
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await _uow.Transactions.AddAsync(new Transaction { UserId = userId, StoreItemId = itemId, Type = TransactionType.Purchase, ManaAmount = -totalPrice }, ct);
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await _uow.EventLogs.AddAsync(new EventLog { Type = EventType.ItemPurchased, UserId = userId, Data = JsonSerializer.Serialize(new { itemId, quantity, totalPrice }) }, ct);
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await _uow.SaveChangesAsync(ct);
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Log.Information("User {User} purchased {Qty} of {Item}", userId, quantity, itemId);
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return inv;
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}
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catch (Exception ex)
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{
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Log.Error(ex, "PurchaseAsync failed {UserId} {ItemId}", userId, itemId);
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throw;
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}
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}
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}
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