using LiteCharms.Features.Shop.Orders.Refunds.Commands;
using LiteCharms.Features.Shop.Postgres;

namespace LiteCharms.Features.Shop.Orders.Refunds.Commands.Handlers;

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

            var refund = await context.OrderRefunds.FirstOrDefaultAsync(r => r.Id == request.OrderRefundId, cancellationToken);

            if (refund is null)
                return Result.Fail($"Order refund not found with id {request.OrderRefundId}");

            refund.Reason = request.Reason;
            refund.Amount = request.Amount;

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