using System.Diagnostics;
using System.Reflection;

using CertMgr.Core;
using CertMgr.Core.Attributes;
using CertMgr.Core.Jobs;
using CertMgr.Core.Validation;

using NUnit.Framework;

namespace certmgrTest;

public class PropertyDescriptorTest
{
    [Test]
    public void First()
    {
        PropertyDescriptor? descriptor = GetProperty(typeof(TestSettings), nameof(TestSettings.StringItems));

        if (descriptor == null)
        {
            throw new Exception(string.Format("property not found"));
        }

        IValueValidator? validator = descriptor.CustomValidator;
    }

    private static PropertyDescriptor? GetProperty(Type settingsType, string name)
    {
        PropertyDescriptor? result = null;

        foreach (PropertyInfo propertyInfo in settingsType.GetProperties(BindingFlags.Public | BindingFlags.Instance))
        {
            if (propertyInfo.Name != name)
            {
                continue;
            }
            SettingAttribute? settingAttribute = propertyInfo.GetCustomAttribute<SettingAttribute>();
            if (settingAttribute is null)
            {
                continue;
            }

            result = new PropertyDescriptor(propertyInfo, settingAttribute, settingsType);
            break;
        }

        return result;
    }

    private sealed class TestSettings : JobSettings
    {
        [Setting("string-names", Validator = typeof(StringItemValidator))]
        public IReadOnlyCollection<string>? StringItems { get; set; }
    }

    private sealed class StringItemValidator : IValueValidator<string>, IValueValidator<IEnumerable<string>>
    {
        public StringItemValidator(string settingName)
        {
            ValueName = settingName;
        }

        public string ValueName { [DebuggerStepThrough] get; }

        Task<IValidationResult> IValueValidator<string>.ValidateAsync(string? settingValue, CancellationToken cancellationToken)
        {
            return Task.FromResult((IValidationResult)new ValidationResult(ValueName, true, "OK"));
        }

        Task<IValidationResult> IValueValidator.ValidateAsync(object? value, CancellationToken cancellationToken)
        {
            return Task.FromResult((IValidationResult)new ValidationResult(ValueName, true, "OK"));
        }

        Task<IValidationResult> IValueValidator<IEnumerable<string>>.ValidateAsync(IEnumerable<string>? settingValue, CancellationToken cancellationToken)
        {
            throw new NotImplementedException();
        }
    }
}