using Jtr.Parsing;
using Microsoft.AspNetCore.Diagnostics;
using Microsoft.AspNetCore.Mvc;

namespace Jtr.Tools.API;

public class GlobalExceptionHandler : IExceptionHandler
{
    public const int ParsingExceptionStatusCode = 499;

    private readonly ILogger<GlobalExceptionHandler> _logger;

    public GlobalExceptionHandler(ILogger<GlobalExceptionHandler> logger)
    {
        _logger = logger;
    }

    public async ValueTask<bool> TryHandleAsync(
        HttpContext httpContext,
        Exception exception,
        CancellationToken cancellationToken
    )
    {
        switch (exception)
        {
            case SyntaxException:
                _logger.LogError(exception, "An exception occurred: {Message}", exception.Message);

                var problem = new ProblemDetails
                {
                    Status = ParsingExceptionStatusCode,
                    Title = "Parsing Exception",
                    Detail = exception.Message
                };

                httpContext.Response.StatusCode = problem.Status.Value;

                await httpContext.Response.WriteAsJsonAsync(problem, cancellationToken);

                return true;

            default:
                return false;
        }
    }
}