using FluentValidation.Results;

namespace cuqmbr.TravelGuide.Application.Common.Exceptions;

public class ValidationException : Exception
{
    public ValidationException()
        : base("One or more validation failures have occurred.")
    {
        Errors = new Dictionary<string, string[]>();
    }

    public ValidationException(string message) : base(message)
    {
        Errors = new Dictionary<string, string[]>();
    }

    public ValidationException(IEnumerable<ValidationFailure> failures)
        : this()
    {
        // TODO: Make serialized dictionary look more like this
        // "errors": {
        //     "viewModel": [
        //           "The viewModel field is required."
        //     ],
        //     "$.addresses[0].order": [
        //           "The JSON value could not be converted to System.Int16. Path: $.addresses[0].order | LineNumber: 5 | BytePositionInLine: 26."
        //     ]
        // },

        Errors = failures
            .GroupBy(f => f.PropertyName, f => f.ErrorMessage)
            .ToDictionary(fg => fg.Key, fg => fg.ToArray());
    }

    public IDictionary<string, string[]> Errors { get; }
}