using FluentValidation.Internal;
using System;
using System.Linq.Expressions;
using System.Reflection;
using zero.Core.Extensions;

namespace zero.Core.Validation
{
  public class ValidatorCamelCasePropertyResolver
  {
    public static string ResolvePropertyName(Type type, MemberInfo memberInfo, LambdaExpression expression)
    {
      return DefaultPropertyNameResolver(type, memberInfo, expression).ToCamelCaseId();
    }

    private static string DefaultPropertyNameResolver(Type type, MemberInfo memberInfo, LambdaExpression expression)
    {
      if (expression != null)
      {
        var chain = PropertyChain.FromExpression(expression);
        if (chain.Count > 0) return chain.ToString();
      }

      if (memberInfo != null)
      {
        return memberInfo.Name;
      }

      return null;
    }
  }
}