using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Text;

namespace TEAMModelOS.SDK
{
    public static class ValidatorHelper
    {
        public static ValidResult IsValid(this Object obj) {
            ValidResult result = new ValidResult();
            try {
                var context = new ValidationContext(obj, null, null);
                var results = new List<ValidationResult>();
                if (Validator.TryValidateObject(obj, context, results, true))
                {
                    result.isVaild = true;
                }
                else
                {
                    List<(string msg,  string name)> error = new List<(string msg, string name)>();
                    foreach (var validationResult in results)
                    {
                        if (validationResult.MemberNames != null && validationResult.MemberNames.Count()>0) {
                            validationResult.MemberNames.ToList().ForEach(x => {
                                error.Add((validationResult.ErrorMessage, x));
                            });
                        }
                    }
                    result.errors = new Dictionary<string, IEnumerable<string>>();
                    error.GroupBy(x => x.name).ToList().ForEach(z => {
                        result.errors.Add(z.Key, z.ToList().Select(x => x.msg));
                    });
                }
            } catch (Exception ex) {
                result.isVaild = false;
                result.errors = new Dictionary<string, IEnumerable<string>>();
                result.errors.Add("InternalError", new List<string> { ex.Message });
            }
            return result;
        }

        
    }
    public class ValidResult
    {
        public string traceId { get; set; } = Guid.NewGuid().ToString();
        public string type { get; set; } = "https://tools.ietf.org/html/rfc7231#section-6.5.1";
        public string title { get; set; } = "One or more validation errors occurred.";
        public int status { get; set; } = 400;
        public bool isVaild { get; set; }
        public Dictionary<string, IEnumerable<string>> errors { get; set; }
    }
}