using System;
using System.Collections.Generic;
using System.Text.RegularExpressions;

using Newtonsoft.Json.Linq;

using SqlKata;

namespace PluralKit.Core
{
    public abstract class PatchObject
    {
        public List<ValidationError> Errors = new();
        public abstract Query Apply(Query q);

        public void AssertIsValid() { }

        protected void AssertValid(string input, string name, int maxLength, Func<string, bool>? validate = null)
        {
            if (input.Length > maxLength)
                Errors.Add(new FieldTooLongError(name, maxLength, input.Length));
            if (validate != null && !validate(input))
                Errors.Add(new ValidationError(name));
        }

        protected void AssertValid(string input, string name, string pattern)
        {
            if (!Regex.IsMatch(input, pattern))
                Errors.Add(new ValidationError(name));
        }

        public PrivacyLevel ParsePrivacy(JObject o, string propertyName)
        {
            var input = o.Value<string>(propertyName);

            if (input == null) return PrivacyLevel.Public;
            if (input == "") return PrivacyLevel.Private;
            if (input == "private") return PrivacyLevel.Private;
            if (input == "public") return PrivacyLevel.Public;

            Errors.Add(new ValidationError(propertyName));
            // unused, but the compiler will complain if this isn't here
            return PrivacyLevel.Private;
        }
    }
}