// 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.Linq;
using System.Net;
using System.Net.Http;
using System.Threading.Tasks;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using Xunit;

namespace Microsoft.AspNetCore.Mvc.FunctionalTests
{
    public class InputValidationTests : IClassFixture<MvcTestFixture<FormatterWebSite.Startup>>
    {
        public InputValidationTests(MvcTestFixture<FormatterWebSite.Startup> fixture)
        {
            Client = fixture.Client;
        }

        public HttpClient Client { get; }

        [Fact]
        public async Task ValidRequest_IsAccepted()
        {
            // Arrange
            var content = new FormUrlEncodedContent(new Dictionary<string, string>
            {
                { "RequiredProp", "1" },
                { "BindRequiredProp", "2" },
                { "RequiredAndBindRequiredProp", "3" },
                { "requiredParam", "4" },
                { "bindRequiredParam", "5" },
                { "requiredAndBindRequiredParam", "6" },
                { "UnboundRequiredProp", "100" }, // Value should not be used
                { "UnboundBindRequiredProp", "101" }, // Value should not be used
                { "BindNeverRequiredProp", "ignoredValue" }, // Value should not be used
            });

            // Act
            var response = await Client.PostAsync("http://localhost/TopLevelValidation", content);
            var responseText = await response.Content.ReadAsStringAsync();

            // Assert
            Assert.Contains("[OptionalProp:0]", responseText);
            Assert.Contains("[RequiredProp:1]", responseText);
            Assert.Contains("[BindRequiredProp:2]", responseText);
            Assert.Contains("[RequiredAndBindRequiredProp:3]", responseText);
            Assert.Contains("[OptionalStringLengthProp:]", responseText);
            Assert.Contains("[OptionalRangeDisplayNameProp:0]", responseText);
            Assert.Contains("[UnboundRequiredProp:0]", responseText);
            Assert.Contains("[UnboundBindRequiredProp:0]", responseText);
            Assert.Contains("[BindNeverRequiredProp:]", responseText);
            Assert.Contains("[optionalParam:0]", responseText);
            Assert.Contains("[requiredParam:4]", responseText);
            Assert.Contains("[bindRequiredParam:5]", responseText);
            Assert.Contains("[requiredAndBindRequiredParam:6]", responseText);
            Assert.Contains("[optionalStringLengthParam:]", responseText);
            Assert.Contains("[optionalRangeDisplayNameParam:0]", responseText);
            Assert.Equal(HttpStatusCode.OK, response.StatusCode);
        }

        [Fact]
        public async Task InvalidRequest_IsRejected()
        {
            // Arrange
            var content = new FormUrlEncodedContent(new Dictionary<string, string>
            {
                { "OptionalStringLengthProp", "ThisStringIsTooLongForTheProperty" },
                { "OptionalRangeDisplayNameProp", "123" },
                { "optionalStringLengthParam", "ThisStringIsTooLongForTheParameter" },
                { "optionalRangeDisplayNameParam", "456" },
            });

            // Act
            var response = await Client.PostAsync("http://localhost/TopLevelValidation", content);
            var responseText = await response.Content.ReadAsStringAsync();
            var errors = JsonConvert.DeserializeObject<JObject>(responseText)
                .Properties()
                .ToDictionary(
                    prop => prop.Name,
                    prop => ((JArray)prop.Value).Single().Value<string>());

            // Assert
            Assert.Equal(HttpStatusCode.BadRequest, response.StatusCode);
            Assert.Equal(10, errors.Count);
            Assert.Equal(
                "The RequiredProp field is required.",
                errors["RequiredProp"]);
            Assert.Equal(
                "A value for the 'BindRequiredProp' property was not provided.",
                errors["BindRequiredProp"]);
            Assert.Equal(
                "A value for the 'RequiredAndBindRequiredProp' property was not provided.",
                errors["RequiredAndBindRequiredProp"]);
            Assert.Equal(
                "The field OptionalStringLengthProp must be a string with a maximum length of 5.",
                errors["OptionalStringLengthProp"]);
            Assert.Equal(
                "The field Some Display Name For Prop must be between 1 and 100.",
                errors["OptionalRangeDisplayNameProp"]);
            Assert.Equal(
                "The requiredParam field is required.",
                errors["requiredParam"]);
            Assert.Equal(
                "A value for the 'bindRequiredParam' property was not provided.",
                errors["bindRequiredParam"]);
            Assert.Equal(
                "A value for the 'requiredAndBindRequiredParam' property was not provided.",
                errors["requiredAndBindRequiredParam"]);
            Assert.Equal(
                "The field optionalStringLengthParam must be a string with a maximum length of 5.",
                errors["optionalStringLengthParam"]);
            Assert.Equal(
                "The field Some Display Name For Param must be between 1 and 100.",
                errors["optionalRangeDisplayNameParam"]);
        }
    }
}