using System;
using System.Collections.Generic;
using System.Text;
using System.Threading.Tasks;
#if NET452
using Microsoft.Owin;
#else
using Microsoft.AspNetCore.Http;
#endif
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using NFluent;
using WireMock.Models;
using WireMock.ResponseBuilders;
using WireMock.Util;
using Xunit;

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

        [Fact]
        public async Task Response_ProvideResponse_Handlebars_WithBodyAsJson_ResultAsObject()
        {
            // Assign
            string jsonString = "{ \"things\": [ { \"name\": \"RequiredThing\" }, { \"name\": \"Wiremock\" } ] }";
            var bodyData = new BodyData
            {
                BodyAsJson = JsonConvert.DeserializeObject(jsonString),
                Encoding = Encoding.UTF8
            };
            var request = new RequestMessage(new UrlDetails("http://localhost/foo_object"), "POST", ClientIp, bodyData);

            var response = Response.Create()
                .WithBodyAsJson(new { x = "test {{request.path}}" })
                .WithTransformer();

            // Act
            var responseMessage = await response.ProvideResponseAsync(request);

            // Assert
            Check.That(JsonConvert.SerializeObject(responseMessage.BodyAsJson)).Equals("{\"x\":\"test /foo_object\"}");
        }

        [Fact]
        public async Task Response_ProvideResponse_Handlebars_UrlPathVerb()
        {
            // Assign
            var body = new BodyData
            {
                BodyAsString = "whatever"
            };
            var request = new RequestMessage(new UrlDetails("http://localhost/foo"), "POST", ClientIp, body);

            var response = Response.Create()
                .WithBody("test {{request.url}} {{request.path}} {{request.method}}")
                .WithTransformer();

            // Act
            var responseMessage = await response.ProvideResponseAsync(request);

            // Assert
            Check.That(responseMessage.Body).Equals("test http://localhost/foo /foo post");
        }

        [Fact]
        public async Task Response_ProvideResponse_Handlebars_UrlPath()
        {
            // Assign
            var urlDetails = UrlUtils.Parse(new Uri("http://localhost/wiremock/a/b"), new PathString("/wiremock"));
            var request = new RequestMessage(urlDetails, "POST", ClientIp);

            var response = Response.Create()
                .WithBody("{{request.url}} {{request.absoluteurl}} {{request.path}} {{request.absolutepath}}")
                .WithTransformer();

            // Act
            var responseMessage = await response.ProvideResponseAsync(request);

            // Assert
            Check.That(responseMessage.Body).Equals("http://localhost/a/b http://localhost/wiremock/a/b /a/b /wiremock/a/b");
        }

        [Fact]
        public async Task Response_ProvideResponse_Handlebars_PathSegments()
        {
            // Assign
            var urlDetails = UrlUtils.Parse(new Uri("http://localhost/wiremock/a/b"), new PathString("/wiremock"));
            var request = new RequestMessage(urlDetails, "POST", ClientIp);

            var response = Response.Create()
                .WithBody("{{request.pathsegments.[0]}} {{request.absolutepathsegments.[0]}}")
                .WithTransformer();

            // Act
            var responseMessage = await response.ProvideResponseAsync(request);

            // Assert
            Check.That(responseMessage.Body).Equals("a wiremock");
        }

        [Fact]
        public async Task Response_ProvideResponse_Handlebars_Query()
        {
            // Assign
            var body = new BodyData
            {
                BodyAsString = "abc"
            };
            var request = new RequestMessage(new UrlDetails("http://localhost/foo?a=1&a=2&b=5"), "POST", ClientIp, body);

            var response = Response.Create()
                .WithBody("test keya={{request.query.a}} idx={{request.query.a.[0]}} idx={{request.query.a.[1]}} keyb={{request.query.b}}")
                .WithTransformer();

            // Act
            var responseMessage = await response.ProvideResponseAsync(request);

            // Assert
            Check.That(responseMessage.Body).Equals("test keya=1 idx=1 idx=2 keyb=5");
        }

        [Fact]
        public async Task Response_ProvideResponse_Handlebars_Header()
        {
            // Assign
            var body = new BodyData
            {
                BodyAsString = "abc"
            };
            var request = new RequestMessage(new UrlDetails("http://localhost/foo"), "POST", ClientIp, body, new Dictionary<string, string[]> { { "Content-Type", new[] { "text/plain" } } });

            var response = Response.Create().WithHeader("x", "{{request.headers.Content-Type}}").WithBody("test").WithTransformer();

            // Act
            var responseMessage = await response.ProvideResponseAsync(request);

            // Assert
            Check.That(responseMessage.Body).Equals("test");
            Check.That(responseMessage.Headers).ContainsKey("x");
            Check.That(responseMessage.Headers["x"]).ContainsExactly("text/plain");
        }

        [Fact]
        public async Task Response_ProvideResponse_Handlebars_Headers()
        {
            // Assign
            var body = new BodyData
            {
                BodyAsString = "abc"
            };
            var request = new RequestMessage(new UrlDetails("http://localhost/foo"), "POST", ClientIp, body, new Dictionary<string, string[]> { { "Content-Type", new[] { "text/plain" } } });

            var response = Response.Create().WithHeader("x", "{{request.headers.Content-Type}}", "{{request.url}}").WithBody("test").WithTransformer();

            // Act
            var responseMessage = await response.ProvideResponseAsync(request);

            // Assert
            Check.That(responseMessage.Body).Equals("test");
            Check.That(responseMessage.Headers).ContainsKey("x");
            Check.That(responseMessage.Headers["x"]).Contains("text/plain");
            Check.That(responseMessage.Headers["x"]).Contains("http://localhost/foo");
        }

        [Fact]
        public async Task Response_ProvideResponse_Handlebars_Origin_Port_Protocol_Host()
        {
            // Assign
            var body = new BodyData
            {
                BodyAsString = "abc"
            };
            var request = new RequestMessage(new UrlDetails("http://localhost:1234"), "POST", ClientIp, body);

            var response = Response.Create()
                .WithBody("test {{request.origin}} {{request.port}} {{request.protocol}} {{request.host}}")
                .WithTransformer();

            // Act
            var responseMessage = await response.ProvideResponseAsync(request);

            // Assert
            Check.That(responseMessage.Body).Equals("test http://localhost:1234 1234 http localhost");
        }

        [Fact]
        public async Task Response_ProvideResponse_Handlebars_JsonPath_SelectToken_Object_ResponseBodyAsJson()
        {
            // Assign
            var body = new BodyData
            {
                BodyAsString = @"{
                  ""Stores"": [
                    ""Lambton Quay"",
                    ""Willis Street""
                  ],
                  ""Manufacturers"": [
                    {
                      ""Name"": ""Acme Co"",
                      ""Products"": [
                        {
                          ""Name"": ""Anvil"",
                          ""Price"": 50
                        }
                      ]
                    },
                    {
                      ""Name"": ""Contoso"",
                      ""Products"": [
                        {
                          ""Name"": ""Elbow Grease"",
                          ""Price"": 99.95
                        },
                        {
                          ""Name"": ""Headlight Fluid"",
                          ""Price"": 4
                        }
                      ]
                    }
                  ]
                }"
            };

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

            var response = Response.Create()
                .WithHeader("Content-Type", "application/json")
                .WithBodyAsJson(new { x = "{{JsonPath.SelectToken request.body \"$.Manufacturers[?(@.Name == 'Acme Co')]\"}}" })
                .WithTransformer();

            // Act
            var responseMessage = await response.ProvideResponseAsync(request);

            // Assert
            JObject j = JObject.FromObject(responseMessage.BodyAsJson);
            Check.That(j["x"]).IsNotNull();
            Check.That(j["x"]["Name"].ToString()).Equals("Acme Co");
        }

        [Fact]
        public async Task Response_ProvideResponse_Handlebars_JsonPath_SelectToken_Number_ResponseBodyAsJson()
        {
            // Assign
            var body = new BodyData { BodyAsString = "{ \"Price\": 99 }" };

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

            var response = Response.Create()
                .WithHeader("Content-Type", "application/json")
                .WithBodyAsJson(new { x = "{{JsonPath.SelectToken request.body \"..Price\"}}" })
                .WithTransformer();

            // Act
            var responseMessage = await response.ProvideResponseAsync(request);

            // Assert
            JObject j = JObject.FromObject(responseMessage.BodyAsJson);
            Check.That(j["x"].Value<long>()).Equals(99);
        }

        [Fact]
        public async Task Response_ProvideResponse_Handlebars_JsonPath_SelectToken_Request_BodyAsString()
        {
            // Assign
            var body = new BodyData
            {
                BodyAsString = @"{
                  ""Stores"": [
                    ""Lambton Quay"",
                    ""Willis Street""
                  ],
                  ""Manufacturers"": [
                    {
                      ""Name"": ""Acme Co"",
                      ""Products"": [
                        {
                          ""Name"": ""Anvil"",
                          ""Price"": 50
                        }
                      ]
                    },
                    {
                      ""Name"": ""Contoso"",
                      ""Products"": [
                        {
                          ""Name"": ""Elbow Grease"",
                          ""Price"": 99.95
                        },
                        {
                          ""Name"": ""Headlight Fluid"",
                          ""Price"": 4
                        }
                      ]
                    }
                  ]
                }"
            };

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

            var response = Response.Create()
                .WithHeader("Content-Type", "application/json")
                .WithBody("{{JsonPath.SelectToken request.body \"$.Manufacturers[?(@.Name == 'Acme Co')]\"}}")
                .WithTransformer();

            // Act
            var responseMessage = await response.ProvideResponseAsync(request);

            // Assert
            Check.That(responseMessage.Body).Equals("{\r\n  \"Name\": \"Acme Co\",\r\n  \"Products\": [\r\n    {\r\n      \"Name\": \"Anvil\",\r\n      \"Price\": 50\r\n    }\r\n  ]\r\n}");
        }

        [Fact]
        public async Task Response_ProvideResponse_Handlebars_JsonPath_SelectToken_Request_BodyAsJObject()
        {
            // Assign
            var body = new BodyData
            {
                BodyAsJson = JObject.Parse(@"{
                  'Stores': [
                    'Lambton Quay',
                    'Willis Street'
                  ],
                  'Manufacturers': [
                    {
                      'Name': 'Acme Co',
                      'Products': [
                        {
                          'Name': 'Anvil',
                          'Price': 50
                        }
                      ]
                    },
                    {
                      'Name': 'Contoso',
                      'Products': [
                        {
                          'Name': 'Elbow Grease',
                          'Price': 99.95
                        },
                        {
                          'Name': 'Headlight Fluid',
                          'Price': 4
                        }
                      ]
                    }
                  ]
                }")
            };

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

            var response = Response.Create()
                .WithHeader("Content-Type", "application/json")
                .WithBody("{{JsonPath.SelectToken request.bodyAsJson \"$.Manufacturers[?(@.Name == 'Acme Co')]\"}}")
                .WithTransformer();

            // Act
            var responseMessage = await response.ProvideResponseAsync(request);

            // Assert
            Check.That(responseMessage.Body).Equals("{\r\n  \"Name\": \"Acme Co\",\r\n  \"Products\": [\r\n    {\r\n      \"Name\": \"Anvil\",\r\n      \"Price\": 50\r\n    }\r\n  ]\r\n}");
        }

        [Fact]
        public async Task Response_ProvideResponse_Handlebars_JsonPath_SelectTokens_Request_BodyAsString()
        {
            // Assign
            var body = new BodyData
            {
                BodyAsString = @"{
                  ""Stores"": [
                    ""Lambton Quay"",
                    ""Willis Street""
                  ],
                  ""Manufacturers"": [
                    {
                      ""Name"": ""Acme Co"",
                      ""Products"": [
                        {
                          ""Name"": ""Anvil"",
                          ""Price"": 50
                        }
                      ]
                    },
                    {
                      ""Name"": ""Contoso"",
                      ""Products"": [
                        {
                          ""Name"": ""Elbow Grease"",
                          ""Price"": 99.95
                        },
                        {
                          ""Name"": ""Headlight Fluid"",
                          ""Price"": 4
                        }
                      ]
                    }
                  ]
                }"
            };

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

            var response = Response.Create()
                .WithHeader("Content-Type", "application/json")
                .WithBody("{{#JsonPath.SelectTokens request.body \"$..Products[?(@.Price >= 50)].Name\"}}{{id}} {{value}},{{/JsonPath.SelectTokens}}")
                .WithTransformer();

            // Act
            var responseMessage = await response.ProvideResponseAsync(request);

            // Assert
            Check.That(responseMessage.Body).Equals("0 Anvil,1 Elbow Grease,");
        }

        [Fact]
        public async Task Response_ProvideResponse_Handlebars_JsonPath_SelectTokens_Request_BodyAsJObject()
        {
            // Assign
            var body = new BodyData
            {
                BodyAsJson = JObject.Parse(@"{
                  'Stores': [
                    'Lambton Quay',
                    'Willis Street'
                  ],
                  'Manufacturers': [
                    {
                      'Name': 'Acme Co',
                      'Products': [
                        {
                          'Name': 'Anvil',
                          'Price': 50
                        }
                      ]
                    },
                    {
                      'Name': 'Contoso',
                      'Products': [
                        {
                          'Name': 'Elbow Grease',
                          'Price': 99.95
                        },
                        {
                          'Name': 'Headlight Fluid',
                          'Price': 4
                        }
                      ]
                    }
                  ]
                }")
            };

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

            var response = Response.Create()
                .WithHeader("Content-Type", "application/json")
                .WithBody("{{#JsonPath.SelectTokens request.bodyAsJson \"$..Products[?(@.Price >= 50)].Name\"}}{{id}} {{value}},{{/JsonPath.SelectTokens}}")
                .WithTransformer();

            // Act
            var responseMessage = await response.ProvideResponseAsync(request);

            // Assert
            Check.That(responseMessage.Body).Equals("0 Anvil,1 Elbow Grease,");
        }

        [Fact]
        public void Response_ProvideResponse_Handlebars_JsonPath_SelectTokens_Throws()
        {
            // Assign
            var body = new BodyData
            {
                BodyAsJson = JObject.Parse(@"{
                  'Stores': [
                    'Lambton Quay',
                    'Willis Street'
                  ]
                }")
            };

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

            var response = Response.Create()
                .WithHeader("Content-Type", "application/json")
                .WithBody("{{#JsonPath.SelectTokens request.body \"$..Products[?(@.Price >= 50)].Name\"}}{{id}} {{value}},{{/JsonPath.SelectTokens}}")
                .WithTransformer();

            // Act
            Check.ThatAsyncCode(() => response.ProvideResponseAsync(request)).Throws<ArgumentNullException>();
        }
    }
}