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

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Threading.Tasks;
using Microsoft.AspNet.Builder;
using Microsoft.AspNet.TestHost;
using Newtonsoft.Json;
using Xunit;

namespace Microsoft.AspNet.Mvc.FunctionalTests
{
    public class ModelBindingTests
    {
        private readonly IServiceProvider _services = TestHelper.CreateServices("ModelBindingWebSite");
        private readonly Action<IApplicationBuilder> _app = new ModelBindingWebSite.Startup().Configure;

        [Fact]
        public async Task ModelBindCancellationTokenParameteres()
        {
            // Arrange
            var server = TestServer.Create(_services, _app);
            var client = server.CreateClient();

            // Act
            var response = await client.GetAsync("http://localhost/Home/ActionWithCancellationToken");

            //Assert
            Assert.Equal(HttpStatusCode.OK, response.StatusCode);
            Assert.Equal("true", await response.Content.ReadAsStringAsync());
        }

        [Fact]
        public async Task ModelBindCancellationToken_ForProperties()
        {
            // Arrange
            var server = TestServer.Create(_services, _app);
            var client = server.CreateClient();

            // Act
            var response = await client.GetAsync(
                "http://localhost/Home/ActionWithCancellationTokenModel?wrapper=bogusValue");

            //Assert
            Assert.Equal(HttpStatusCode.OK, response.StatusCode);
            Assert.Equal("true", await response.Content.ReadAsStringAsync());
        }

        [Fact]
        public async Task ModelBindingBindsBase64StringsToByteArrays()
        {
            // Arrange
            var server = TestServer.Create(_services, _app);
            var client = server.CreateClient();

            // Act
            var response = await client.GetAsync("http://localhost/Home/Index?byteValues=SGVsbG9Xb3JsZA==");

            //Assert
            Assert.Equal(HttpStatusCode.OK, response.StatusCode);
            Assert.Equal("HelloWorld", await response.Content.ReadAsStringAsync());
        }

        [Fact]
        public async Task ModelBindingBindsEmptyStringsToByteArrays()
        {
            // Arrange
            var server = TestServer.Create(_services, _app);
            var client = server.CreateClient();

            // Act
            var response = await client.GetAsync("http://localhost/Home/Index?byteValues=");

            //Assert
            Assert.Equal(HttpStatusCode.OK, response.StatusCode);
            Assert.Equal("\0", await response.Content.ReadAsStringAsync());
        }

        [Fact]
        public async Task ModelBinding_LimitsErrorsToMaxErrorCount()
        {
            // Arrange
            var server = TestServer.Create(_services, _app);
            var client = server.CreateClient();
            var queryString = string.Join("=&", Enumerable.Range(0, 10).Select(i => "field" + i));

            // Act
            var response = await client.GetStringAsync("http://localhost/Home/ModelWithTooManyValidationErrors?" + queryString);

            //Assert
            var json = JsonConvert.DeserializeObject<Dictionary<string, string>>(response);
            // 8 is the value of MaxModelValidationErrors for the application being tested.
            Assert.Equal(8, json.Count);
            Assert.Equal("The Field1 field is required.", json["Field1.Field1"]);
            Assert.Equal("The Field2 field is required.", json["Field1.Field2"]);
            Assert.Equal("The Field3 field is required.", json["Field1.Field3"]);
            Assert.Equal("The Field1 field is required.", json["Field2.Field1"]);
            Assert.Equal("The Field2 field is required.", json["Field2.Field2"]);
            Assert.Equal("The Field3 field is required.", json["Field2.Field3"]);
            Assert.Equal("The Field1 field is required.", json["Field3.Field1"]);
            Assert.Equal("The maximum number of allowed model errors has been reached.", json[""]);
        }

        [Fact]
        public async Task ModelBinding_ValidatesAllPropertiesInModel()
        {
            // Arrange
            var server = TestServer.Create(_services, _app);
            var client = server.CreateClient();

            // Act
            var response = await client.GetStringAsync("http://localhost/Home/ModelWithFewValidationErrors?model=");

            //Assert
            var json = JsonConvert.DeserializeObject<Dictionary<string, string>>(response);
            Assert.Equal(3, json.Count);
            Assert.Equal("The Field1 field is required.", json["model.Field1"]);
            Assert.Equal("The Field2 field is required.", json["model.Field2"]);
            Assert.Equal("The Field3 field is required.", json["model.Field3"]);
        }
    }
}