using Microsoft.AspNetCore.Diagnostics;
using Microsoft.AspNetCore.Mvc;

namespace FinancialApi;

public class DomainExceptionHandler : IExceptionHandler
{
    public async ValueTask<bool> TryHandleAsync(
        HttpContext httpContext, 
        Exception exception, 
        CancellationToken cancellationToken)
    {
        // Only intercept our specific domain/validation exceptions
        if (exception is InvalidOperationException or ArgumentException)
        {
            var problemDetails = new ProblemDetails
            {
                Status = StatusCodes.Status400BadRequest,
                Title = "Domain Validation Error",
                Detail = exception.Message,
                Type = "https://datatracker.ietf.org/doc/html/rfc7231#section-6.5.1"
            };

            httpContext.Response.StatusCode = problemDetails.Status.Value;
            await httpContext.Response.WriteAsJsonAsync(problemDetails, cancellationToken);
            
            return true;
        }

        return false; 
    }
}