// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using Microsoft.AspNetCore.Mvc.DataAnnotations;
using Microsoft.AspNetCore.Testing;
using Microsoft.Extensions.Localization;
using Moq;
using Xunit;

namespace Microsoft.AspNetCore.Mvc.ModelBinding.Validation
{
    public class FileExtensionsAttributeAdapterTest
    {
        [Theory]
        [InlineData("", ".png,.jpg,.jpeg,.gif")]
        [InlineData(null, ".png,.jpg,.jpeg,.gif")]
        [ReplaceCulture]
        public void AddValidation_WithoutLocalizationAndDefaultFileExtensions(string extensions, string expectedExtensions)
        {
            // Arrange
            var provider = TestModelMetadataProvider.CreateDefaultProvider();
            var metadata = provider.GetMetadataForProperty(typeof(Profile), nameof(Profile.PhotoFileName));

            var attribute = new FileExtensionsAttribute() { Extensions = extensions };
            attribute.ErrorMessage = "{0} expects only the following extensions: {1}";

            // FileExtensionsAttribute formats the extension list for the error message
            var formattedExtensions = string.Join(", ", expectedExtensions.Split(','));
            var expectedErrorMessage = string.Format(attribute.ErrorMessage, nameof(Profile.PhotoFileName), formattedExtensions);

            var adapter = new FileExtensionsAttributeAdapter(attribute, stringLocalizer: null);
            var context = new ClientModelValidationContext(new ActionContext(), metadata, provider, new Dictionary<string, string>());

            // Act
            adapter.AddValidation(context);

            // Assert
            Assert.Collection(
                context.Attributes,
                kvp => { Assert.Equal("data-val", kvp.Key); Assert.Equal("true", kvp.Value); },
                kvp => { Assert.Equal("data-val-fileextensions", kvp.Key); Assert.Equal(expectedErrorMessage, kvp.Value); },
                kvp => { Assert.Equal("data-val-fileextensions-extensions", kvp.Key); Assert.Equal(expectedExtensions, kvp.Value); });
        }

        public static TheoryData<string, string> ExtensionsData
        {
            get
            {
                return new TheoryData<string, string>()
                {
                    { "jpg", ".jpg" },
                    { " j p g ", ".jpg" },
                    { ".jpg", ".jpg" },
                    { ".x", ".x" },
                    { "jpg,png", ".jpg,.png" },
                    { "jpg, png", ".jpg,.png" },
                    { "JPG, Png", ".jpg,.png" },
                    { ".jpg,.png", ".jpg,.png" },
                    { "..jpg,..png", ".jpg,.png" },
                    { ".TXT, .png", ".txt,.png" },
                    { ".pdf , .docx", ".pdf,.docx" },
                };
            }
        }

        [Theory]
        [MemberData(nameof(ExtensionsData))]
        [ReplaceCulture]
        public void AddValidation_WithoutLocalizationAndCustomFileExtensions(string extensions, string expectedExtensions)
        {
            // Arrange
            var provider = TestModelMetadataProvider.CreateDefaultProvider();
            var metadata = provider.GetMetadataForProperty(typeof(Profile), nameof(Profile.PhotoFileName));

            var attribute = new FileExtensionsAttribute() { Extensions = extensions };
            attribute.ErrorMessage = "{0} expects only the following extensions: {1}";

            // FileExtensionsAttribute formats the extension list for the error message
            var formattedExtensions = string.Join(", ", expectedExtensions.Split(','));
            var expectedErrorMessage = string.Format(attribute.ErrorMessage, nameof(Profile.PhotoFileName), formattedExtensions);

            var adapter = new FileExtensionsAttributeAdapter(attribute, stringLocalizer: null);
            var context = new ClientModelValidationContext(new ActionContext(), metadata, provider, new Dictionary<string, string>());

            // Act
            adapter.AddValidation(context);

            // Assert
            Assert.Collection(
                context.Attributes,
                kvp => { Assert.Equal("data-val", kvp.Key); Assert.Equal("true", kvp.Value); },
                kvp => { Assert.Equal("data-val-fileextensions", kvp.Key); Assert.Equal(expectedErrorMessage, kvp.Value); },
                kvp => { Assert.Equal("data-val-fileextensions-extensions", kvp.Key); Assert.Equal(expectedExtensions, kvp.Value); });
        }

        [Theory]
        [MemberData(nameof(ExtensionsData))]
        [ReplaceCulture]
        public void AddValidation_WithLocalization(string extensions, string expectedExtensions)
        {
            // Arrange
            var provider = TestModelMetadataProvider.CreateDefaultProvider();
            var metadata = provider.GetMetadataForProperty(typeof(Profile), nameof(Profile.PhotoFileName));

            var attribute = new FileExtensionsAttribute() { Extensions = extensions };
            attribute.ErrorMessage = "{0} expects only the following extensions: {1}";

            var formattedExtensions = string.Join(", ", expectedExtensions.Split(','));
            var expectedProperties = new object[] { "PhotoFileName", formattedExtensions };
            var expectedErrorMessage = $"{nameof(Profile.PhotoFileName)} expects only the following extensions: {formattedExtensions}";

            var stringLocalizer = new Mock<IStringLocalizer>();
            stringLocalizer
                .Setup(s => s[attribute.ErrorMessage, expectedProperties])
                .Returns(new LocalizedString(attribute.ErrorMessage, expectedErrorMessage));

            var adapter = new FileExtensionsAttributeAdapter(attribute, stringLocalizer: stringLocalizer.Object);
            var context = new ClientModelValidationContext(new ActionContext(), metadata, provider, new Dictionary<string, string>());

            // Act
            adapter.AddValidation(context);

            // Assert
            Assert.Collection(
                context.Attributes,
                kvp => { Assert.Equal("data-val", kvp.Key); Assert.Equal("true", kvp.Value); },
                kvp => { Assert.Equal("data-val-fileextensions", kvp.Key); Assert.Equal(expectedErrorMessage, kvp.Value); },
                kvp => { Assert.Equal("data-val-fileextensions-extensions", kvp.Key); Assert.Equal(expectedExtensions, kvp.Value); });
        }

        [Fact]
        [ReplaceCulture]
        public void AddValidation_DoesNotTrounceExistingAttributes()
        {
            // Arrange
            var provider = TestModelMetadataProvider.CreateDefaultProvider();
            var metadata = provider.GetMetadataForProperty(typeof(Profile), "PhotoFileName");

            var attribute = new FileExtensionsAttribute() { Extensions = "jpg" };
            attribute.ErrorMessage = "{0} expects only the following extensions: {1}";

            var adapter = new FileExtensionsAttributeAdapter(attribute, stringLocalizer: null);
            var context = new ClientModelValidationContext(new ActionContext(), metadata, provider, new Dictionary<string, string>());

            context.Attributes.Add("data-val", "original");
            context.Attributes.Add("data-val-fileextensions", "original");
            context.Attributes.Add("data-val-fileextensions-extensions", "original");

            // Act
            adapter.AddValidation(context);

            // Assert
            Assert.Collection(
                context.Attributes,
                kvp => { Assert.Equal("data-val", kvp.Key); Assert.Equal("original", kvp.Value); },
                kvp => { Assert.Equal("data-val-fileextensions", kvp.Key); Assert.Equal("original", kvp.Value); },
                kvp => { Assert.Equal("data-val-fileextensions-extensions", kvp.Key); Assert.Equal("original", kvp.Value); });
        }

        private class Profile
        {
            public string PhotoFileName { get; set; }
        }
    }
}