// 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;
using System.Net;
using System.Net.Http;
using System.Threading.Tasks;
using Microsoft.AspNetCore.TestHost;
using RoutingWebSite;
using Xunit;

namespace Microsoft.AspNetCore.Routing.FunctionalTests
{
    public class EndpointRoutingSampleTest : IDisposable
    {
        private readonly HttpClient _client;
        private readonly TestServer _testServer;

        public EndpointRoutingSampleTest()
        {
            var webHostBuilder = Program.GetWebHostBuilder(new[] { Program.EndpointRoutingScenario, });
            _testServer = new TestServer(webHostBuilder);
            _client = _testServer.CreateClient();
            _client.BaseAddress = new Uri("http://localhost");
        }

        [Fact]
        public async Task MatchesRootPath_AndReturnsPlaintext()
        {
            // Arrange
            var expectedContentType = "text/plain";
            var expectedContent = "Endpoint Routing sample endpoints:" + Environment.NewLine + "/plaintext";

            // Act
            var response = await _client.GetAsync("/");

            // Assert
            Assert.Equal(HttpStatusCode.OK, response.StatusCode);
            Assert.NotNull(response.Content);
            Assert.NotNull(response.Content.Headers.ContentType);
            Assert.Equal(expectedContentType, response.Content.Headers.ContentType.MediaType);
            var actualContent = await response.Content.ReadAsStringAsync();
            Assert.Equal(expectedContent, actualContent);
        }

        [Fact]
        public async Task MatchesStaticRouteTemplate_AndReturnsPlaintext()
        {
            // Arrange
            var expectedContentType = "text/plain";
            var expectedContent = "Hello, World!";

            // Act
            var response = await _client.GetAsync("/plaintext");

            // Assert
            Assert.Equal(HttpStatusCode.OK, response.StatusCode);
            Assert.NotNull(response.Content);
            Assert.NotNull(response.Content.Headers.ContentType);
            Assert.Equal(expectedContentType, response.Content.Headers.ContentType.MediaType);
            var actualContent = await response.Content.ReadAsStringAsync();
            Assert.Equal(expectedContent, actualContent);
        }

        [Fact]
        public async Task MatchesEndpoint_WithSuccessfulConstraintMatch()
        {
            // Arrange
            var expectedContent = "WithConstraints";

            // Act
            var response = await _client.GetAsync("/withconstraints/555_001");

            // Assert
            Assert.Equal(HttpStatusCode.OK, response.StatusCode);
            Assert.NotNull(response.Content);
            var actualContent = await response.Content.ReadAsStringAsync();
            Assert.Equal(expectedContent, actualContent);
        }

        [Fact]
        public async Task DoesNotMatchEndpoint_IfConstraintMatchFails()
        {
            // Arrange & Act
            var response = await _client.GetAsync("/withconstraints/555");

            // Assert
            Assert.Equal(HttpStatusCode.NotFound, response.StatusCode);
        }

        [Fact]
        public async Task MatchesEndpoint_WithSuccessful_OptionalConstraintMatch()
        {
            // Arrange
            var expectedContent = "withoptionalconstraints";

            // Act
            var response = await _client.GetAsync("/withoptionalconstraints/555_001");

            // Assert
            Assert.Equal(HttpStatusCode.OK, response.StatusCode);
            Assert.NotNull(response.Content);
            var actualContent = await response.Content.ReadAsStringAsync();
            Assert.Equal(expectedContent, actualContent);
        }

        [Fact]
        public async Task MatchesEndpoint_WithSuccessful_OptionalConstraintMatch_NoValueForParameter()
        {
            // Arrange
            var expectedContent = "withoptionalconstraints";

            // Act
            var response = await _client.GetAsync("/withoptionalconstraints");

            // Assert
            Assert.Equal(HttpStatusCode.OK, response.StatusCode);
            Assert.NotNull(response.Content);
            var actualContent = await response.Content.ReadAsStringAsync();
            Assert.Equal(expectedContent, actualContent);
        }

        [Fact]
        public async Task DoesNotMatchEndpoint_IfOptionalConstraintMatchFails()
        {
            // Arrange & Act
            var response = await _client.GetAsync("/withoptionalconstraints/555");

            // Assert
            Assert.Equal(HttpStatusCode.NotFound, response.StatusCode);
        }

        [Theory]
        [InlineData("/WithSingleAsteriskCatchAll/a/b/c", "Link: /WithSingleAsteriskCatchAll/a%2Fb%2Fc")]
        [InlineData("/WithSingleAsteriskCatchAll/a/b b1/c c1", "Link: /WithSingleAsteriskCatchAll/a%2Fb%20b1%2Fc%20c1")]
        public async Task GeneratesLink_ToEndpointWithSingleAsteriskCatchAllParameter_EncodesValue(
            string url,
            string expected)
        {
            // Arrange & Act
            var response = await _client.GetAsync(url);

            // Assert
            Assert.Equal(HttpStatusCode.OK, response.StatusCode);
            Assert.NotNull(response.Content);
            var actualContent = await response.Content.ReadAsStringAsync();
            Assert.Equal(expected, actualContent);
        }

        [Theory]
        [InlineData("/WithDoubleAsteriskCatchAll/a/b/c", "Link: /WithDoubleAsteriskCatchAll/a/b/c")]
        [InlineData("/WithDoubleAsteriskCatchAll/a/b/c/", "Link: /WithDoubleAsteriskCatchAll/a/b/c/")]
        [InlineData("/WithDoubleAsteriskCatchAll/a//b/c", "Link: /WithDoubleAsteriskCatchAll/a//b/c")]
        public async Task GeneratesLink_ToEndpointWithDoubleAsteriskCatchAllParameter_DoesNotEncodeSlashes(
            string url,
            string expected)
        {
            // Arrange & Act
            var response = await _client.GetAsync(url);

            // Assert
            Assert.Equal(HttpStatusCode.OK, response.StatusCode);
            Assert.NotNull(response.Content);
            var actualContent = await response.Content.ReadAsStringAsync();
            Assert.Equal(expected, actualContent);
        }

        [Fact]
        public async Task GeneratesLink_ToEndpointWithDoubleAsteriskCatchAllParameter_EncodesContentOtherThanSlashes()
        {
            // Arrange & Act
            var response = await _client.GetAsync("/WithDoubleAsteriskCatchAll/a/b b1/c c1");

            // Assert
            Assert.Equal(HttpStatusCode.OK, response.StatusCode);
            Assert.NotNull(response.Content);
            var actualContent = await response.Content.ReadAsStringAsync();
            Assert.Equal("Link: /WithDoubleAsteriskCatchAll/a/b%20b1/c%20c1", actualContent);
        }

        public void Dispose()
        {
            _testServer.Dispose();
            _client.Dispose();
        }
    }
}