// ==========================================================================
//  StringFieldPropertiesTests.cs
//  Squidex Headless CMS
// ==========================================================================
//  Copyright (c) Squidex Group
//  All rights reserved.
// ==========================================================================

using System;
using System.Collections.Generic;
using System.Collections.Immutable;
using System.Linq;
using System.Reflection;
using FluentAssertions;
using Squidex.Infrastructure;
using Xunit;

namespace Squidex.Core.Schemas
{
    public class StringFieldPropertiesTests
    {
        private readonly List<ValidationError> errors = new List<ValidationError>();

        [Fact]
        public void Should_add_error_if_min_greater_than_max()
        {
            var sut = new StringFieldProperties { MinLength = 10, MaxLength = 5 };

            sut.Validate(errors);

            errors.ShouldBeEquivalentTo(
                new List<ValidationError>
                {
                    new ValidationError("Max length must be greater than min length", "MinLength", "MaxLength")
                });
        }

        [Fact]
        public void Should_add_error_if_allowed_values_and_max_value_is_specified()
        {
            var sut = new StringFieldProperties { MinLength = 10, AllowedValues = ImmutableList.Create("4") };

            sut.Validate(errors);

            errors.ShouldBeEquivalentTo(
                new List<ValidationError>
                {
                    new ValidationError("Either allowed values or min and max length can be defined", "AllowedValues", "MinLength", "MaxLength")
                });
        }

        [Fact]
        public void Should_add_error_if_allowed_values_and_min_value_is_specified()
        {
            var sut = new StringFieldProperties { MaxLength = 10, AllowedValues = ImmutableList.Create("4") };

            sut.Validate(errors);

            errors.ShouldBeEquivalentTo(
                new List<ValidationError>
                {
                    new ValidationError("Either allowed values or min and max length can be defined", "AllowedValues", "MinLength", "MaxLength")
                });
        }

        [Fact]
        public void Should_add_error_if_radio_button_has_no_allowed_values()
        {
            var sut = new StringFieldProperties { Editor = StringFieldEditor.Radio };

            sut.Validate(errors);

            errors.ShouldBeEquivalentTo(
                new List<ValidationError>
                {
                    new ValidationError("Radio buttons or dropdown list need allowed values", "AllowedValues")
                });
        }

        [Fact]
        public void Should_add_error_if_editor_is_not_valid()
        {
            var sut = new StringFieldProperties { Editor = (StringFieldEditor)123 };

            sut.Validate(errors);

            errors.ShouldBeEquivalentTo(
                new List<ValidationError>
                {
                    new ValidationError("Editor ist not a valid value", "Editor")
                });
        }

        [Fact]
        public void Should_add_error_if_pattern_is_not_valid_regex()
        {
            var sut = new StringFieldProperties { Pattern = "[0-9{1}"};

            sut.Validate(errors);

            errors.ShouldBeEquivalentTo(
                new List<ValidationError>
                {
                    new ValidationError("Pattern is not a valid expression", "Pattern")
                });
        }

        [Fact]
        public void Should_set_or_freeze_sut()
        {
            var sut = new StringFieldProperties();

            foreach (var property in sut.GetType().GetRuntimeProperties().Where(x => x.Name != "IsFrozen"))
            {
                var value =
                    property.PropertyType.GetTypeInfo().IsValueType ?
                        Activator.CreateInstance(property.PropertyType) :
                        null;

                property.SetValue(sut, value);

                var result = property.GetValue(sut);

                Assert.Equal(value, result);
            }

            sut.Freeze();

            foreach (var property in sut.GetType().GetRuntimeProperties().Where(x => x.Name != "IsFrozen"))
            {
                var value =
                    property.PropertyType.GetTypeInfo().IsValueType ?
                        Activator.CreateInstance(property.PropertyType) :
                        null;

                Assert.Throws<InvalidOperationException>(() =>
                {
                    try
                    {
                        property.SetValue(sut, value);
                    }
                    catch (Exception ex)
                    {
                        throw ex.InnerException;
                    }
                });
            }
        }
    }
}