using System;
using System.Threading.Tasks;
using Moq;
using NFluent;
using WireMock.Handlers;
using WireMock.Models;
using WireMock.ResponseBuilders;
using WireMock.Settings;
using WireMock.Types;
using WireMock.Util;
using Xunit;

namespace WireMock.Net.Tests.ResponseBuilders
{
    public class ResponseWithHandlebarsRegexTests
    {
        private const string ClientIp = "::1";

        private readonly Mock<IFileSystemHandler> _filesystemHandlerMock;
        private readonly WireMockServerSettings _settings = new WireMockServerSettings();

        public ResponseWithHandlebarsRegexTests()
        {
            _filesystemHandlerMock = new Mock<IFileSystemHandler>(MockBehavior.Strict);
            _filesystemHandlerMock.Setup(fs => fs.ReadResponseBodyAsString(It.IsAny<string>())).Returns("abc");

            _settings.FileSystemHandler = _filesystemHandlerMock.Object;
        }

        [Fact]
        public async Task Response_ProvideResponseAsync_Handlebars_RegexMatch()
        {
            // Assign
            var body = new BodyData { BodyAsString = "abc", DetectedBodyType = BodyType.String };

            var request = new RequestMessage(new UrlDetails("http://localhost:1234"), "POST", ClientIp, body);

            var responseBuilder = Response.Create()
                .WithBody("{{Regex.Match request.body \"^(\\w+)$\"}}")
                .WithTransformer();

            // Act
            var response = await responseBuilder.ProvideResponseAsync(request, _settings);

            // assert
            Check.That(response.Message.BodyData.BodyAsString).Equals("abc");
        }

        [Fact]
        public async Task Response_ProvideResponseAsync_Handlebars_RegexMatch_NoMatch()
        {
            // Assign
            var body = new BodyData { BodyAsString = "abc", DetectedBodyType = BodyType.String };

            var request = new RequestMessage(new UrlDetails("http://localhost:1234"), "POST", ClientIp, body);

            var responseBuilder = Response.Create()
                .WithBody("{{Regex.Match request.body \"^?0$\"}}")
                .WithTransformer();

            // Act
            var response = await responseBuilder.ProvideResponseAsync(request, _settings);

            // assert
            Check.That(response.Message.BodyData.BodyAsString).Equals("");
        }

        [Fact]
        public async Task Response_ProvideResponseAsync_Handlebars_RegexMatch2()
        {
            // Assign
            var body = new BodyData { BodyAsString = "https://localhost:5000/", DetectedBodyType = BodyType.String };

            var request = new RequestMessage(new UrlDetails("http://localhost:1234"), "POST", ClientIp, body);

            var responseBuilder = Response.Create()
                .WithBody("{{#Regex.Match request.body \"^(?<proto>\\w+)://[^/]+?(?<port>\\d+)/?\"}}{{this.port}}-{{this.proto}}{{/Regex.Match}}")
                .WithTransformer();

            // Act
            var response = await responseBuilder.ProvideResponseAsync(request, _settings);

            // assert
            Check.That(response.Message.BodyData.BodyAsString).Equals("5000-https");
        }

        [Fact]
        public async Task Response_ProvideResponseAsync_Handlebars_RegexMatch2_NoMatch()
        {
            // Assign
            var body = new BodyData { BodyAsString = "{{\\test", DetectedBodyType = BodyType.String };

            var request = new RequestMessage(new UrlDetails("http://localhost:1234"), "POST", ClientIp, body);

            var responseBuilder = Response.Create()
                .WithBody("{{#Regex.Match request.body \"^(?<proto>\\w+)://[^/]+?(?<port>\\d+)/?\"}}{{this}}{{/Regex.Match}}")
                .WithTransformer();

            // Act
            var response = await responseBuilder.ProvideResponseAsync(request, _settings);

            // assert
            Check.That(response.Message.BodyData.BodyAsString).Equals("");
        }

        [Fact]
        public void Response_ProvideResponseAsync_Handlebars_RegexMatch2_Throws()
        {
            // Assign
            var body = new BodyData { BodyAsString = "{{\\test", DetectedBodyType = BodyType.String };

            var request = new RequestMessage(new UrlDetails("http://localhost:1234"), "POST", ClientIp, body);

            var responseBuilder = Response.Create()
                .WithBody("{{#Regex.Match request.bodyAsJson \"^(?<proto>\\w+)://[^/]+?(?<port>\\d+)/?\"}}{{/Regex.Match}}")
                .WithTransformer();

            // Act and Assert
            Check.ThatAsyncCode(() => responseBuilder.ProvideResponseAsync(request, _settings)).Throws<ArgumentNullException>();
        }
    }
}