using LiteCharms.Features.Shop.Postgres;

namespace LiteCharms.Features.Orders.Commands.Handlers;

public class UpdateOrderStatusCommandHandler(IDbContextFactory<ShopDbContext> contextFactory) : IRequestHandler<UpdateOrderStatusCommand, Result>
{
    public async ValueTask<Result> Handle(UpdateOrderStatusCommand request, CancellationToken cancellationToken)
    {
		try
		{
            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);

            var order = await context.Orders.FirstOrDefaultAsync(o => o.Id == request.OrderId, cancellationToken);

            if (order is null)
                return Result.Fail(new Error($"Order {request.OrderId} not found"));

            order.Status = request.Status;

            return await context.SaveChangesAsync(cancellationToken) > 0
                ? Result.Ok()
                : Result.Fail(new Error($"Failed to update order {request.OrderId}"));
        }
		catch (Exception ex)
		{
            return Result.Fail(new Error(ex.Message).CausedBy(ex));
        }
    }
}