use std::collections::HashMap;
use std::io::{Read, Write};
use std::sync::atomic::{AtomicUsize, Ordering};
use std::sync::Arc;
use std::time::Duration;

use brotli2::write::BrotliEncoder;
use bytes::Bytes;
use flate2::read::GzDecoder;
use flate2::write::GzEncoder;
use flate2::Compression;
use futures::future::ok;
use rand::Rng;

use actix_http::HttpService;
use actix_http_test::{block_on, TestServer};
use actix_service::pipeline_factory;
use actix_web::http::Cookie;
use actix_web::middleware::{BodyEncoding, Compress};
use actix_web::{http::header, web, App, Error, HttpMessage, HttpRequest, HttpResponse};
use awc::error::SendRequestError;

const STR: &str = "Hello World Hello World Hello World Hello World Hello World \
                   Hello World Hello World Hello World Hello World Hello World \
                   Hello World Hello World Hello World Hello World Hello World \
                   Hello World Hello World Hello World Hello World Hello World \
                   Hello World Hello World Hello World Hello World Hello World \
                   Hello World Hello World Hello World Hello World Hello World \
                   Hello World Hello World Hello World Hello World Hello World \
                   Hello World Hello World Hello World Hello World Hello World \
                   Hello World Hello World Hello World Hello World Hello World \
                   Hello World Hello World Hello World Hello World Hello World \
                   Hello World Hello World Hello World Hello World Hello World \
                   Hello World Hello World Hello World Hello World Hello World \
                   Hello World Hello World Hello World Hello World Hello World \
                   Hello World Hello World Hello World Hello World Hello World \
                   Hello World Hello World Hello World Hello World Hello World \
                   Hello World Hello World Hello World Hello World Hello World \
                   Hello World Hello World Hello World Hello World Hello World \
                   Hello World Hello World Hello World Hello World Hello World \
                   Hello World Hello World Hello World Hello World Hello World \
                   Hello World Hello World Hello World Hello World Hello World \
                   Hello World Hello World Hello World Hello World Hello World";

#[test]
fn test_simple() {
    block_on(async {
        let srv = TestServer::start(|| {
            HttpService::new(App::new().service(
                web::resource("/").route(web::to(|| HttpResponse::Ok().body(STR))),
            ))
        });

        let request = srv.get("/").header("x-test", "111").send();
        let mut response = request.await.unwrap();
        assert!(response.status().is_success());

        // read response
        let bytes = response.body().await.unwrap();
        assert_eq!(bytes, Bytes::from_static(STR.as_ref()));

        let mut response = srv.post("/").send().await.unwrap();
        assert!(response.status().is_success());

        // read response
        let bytes = response.body().await.unwrap();
        assert_eq!(bytes, Bytes::from_static(STR.as_ref()));

        // camel case
        let response = srv.post("/").camel_case().send().await.unwrap();
        assert!(response.status().is_success());
    })
}

#[test]
fn test_json() {
    block_on(async {
        let srv = TestServer::start(|| {
            HttpService::new(
                App::new().service(
                    web::resource("/")
                        .route(web::to(|_: web::Json<String>| HttpResponse::Ok())),
                ),
            )
        });

        let request = srv
            .get("/")
            .header("x-test", "111")
            .send_json(&"TEST".to_string());
        let response = request.await.unwrap();
        assert!(response.status().is_success());
    })
}

#[test]
fn test_form() {
    block_on(async {
        let srv = TestServer::start(|| {
            HttpService::new(App::new().service(web::resource("/").route(web::to(
                |_: web::Form<HashMap<String, String>>| HttpResponse::Ok(),
            ))))
        });

        let mut data = HashMap::new();
        let _ = data.insert("key".to_string(), "TEST".to_string());

        let request = srv.get("/").header("x-test", "111").send_form(&data);
        let response = request.await.unwrap();
        assert!(response.status().is_success());
    })
}

#[test]
fn test_timeout() {
    block_on(async {
        let srv = TestServer::start(|| {
            HttpService::new(App::new().service(web::resource("/").route(
                web::to_async(|| {
                    async {
                        tokio_timer::delay_for(Duration::from_millis(200)).await;
                        Ok::<_, Error>(HttpResponse::Ok().body(STR))
                    }
                }),
            )))
        });

        let client = awc::Client::build()
            .timeout(Duration::from_millis(50))
            .finish();
        let request = client.get(srv.url("/")).send();
        match request.await {
            Err(SendRequestError::Timeout) => (),
            _ => panic!(),
        }
    })
}

#[test]
fn test_timeout_override() {
    block_on(async {
        let srv = TestServer::start(|| {
            HttpService::new(App::new().service(web::resource("/").route(
                web::to_async(|| {
                    async {
                        tokio_timer::delay_for(Duration::from_millis(200)).await;
                        Ok::<_, Error>(HttpResponse::Ok().body(STR))
                    }
                }),
            )))
        });

        let client = awc::Client::build()
            .timeout(Duration::from_millis(50000))
            .finish();
        let request = client
            .get(srv.url("/"))
            .timeout(Duration::from_millis(50))
            .send();
        match request.await {
            Err(SendRequestError::Timeout) => (),
            _ => panic!(),
        }
    })
}

#[test]
fn test_connection_reuse() {
    block_on(async {
        let num = Arc::new(AtomicUsize::new(0));
        let num2 = num.clone();

        let srv = TestServer::start(move || {
            let num2 = num2.clone();
            pipeline_factory(move |io| {
                num2.fetch_add(1, Ordering::Relaxed);
                ok(io)
            })
            .and_then(HttpService::new(App::new().service(
                web::resource("/").route(web::to(|| HttpResponse::Ok())),
            )))
        });

        let client = awc::Client::default();

        // req 1
        let request = client.get(srv.url("/")).send();
        let response = request.await.unwrap();
        assert!(response.status().is_success());

        // req 2
        let req = client.post(srv.url("/"));
        let response = req.send().await.unwrap();
        assert!(response.status().is_success());

        // one connection
        assert_eq!(num.load(Ordering::Relaxed), 1);
    })
}

#[test]
fn test_connection_force_close() {
    block_on(async {
        let num = Arc::new(AtomicUsize::new(0));
        let num2 = num.clone();

        let srv = TestServer::start(move || {
            let num2 = num2.clone();
            pipeline_factory(move |io| {
                num2.fetch_add(1, Ordering::Relaxed);
                ok(io)
            })
            .and_then(HttpService::new(App::new().service(
                web::resource("/").route(web::to(|| HttpResponse::Ok())),
            )))
        });

        let client = awc::Client::default();

        // req 1
        let request = client.get(srv.url("/")).force_close().send();
        let response = request.await.unwrap();
        assert!(response.status().is_success());

        // req 2
        let req = client.post(srv.url("/")).force_close();
        let response = req.send().await.unwrap();
        assert!(response.status().is_success());

        // two connection
        assert_eq!(num.load(Ordering::Relaxed), 2);
    })
}

#[test]
fn test_connection_server_close() {
    block_on(async {
        let num = Arc::new(AtomicUsize::new(0));
        let num2 = num.clone();

        let srv = TestServer::start(move || {
            let num2 = num2.clone();
            pipeline_factory(move |io| {
                num2.fetch_add(1, Ordering::Relaxed);
                ok(io)
            })
            .and_then(HttpService::new(
                App::new().service(
                    web::resource("/")
                        .route(web::to(|| HttpResponse::Ok().force_close().finish())),
                ),
            ))
        });

        let client = awc::Client::default();

        // req 1
        let request = client.get(srv.url("/")).send();
        let response = request.await.unwrap();
        assert!(response.status().is_success());

        // req 2
        let req = client.post(srv.url("/"));
        let response = req.send().await.unwrap();
        assert!(response.status().is_success());

        // two connection
        assert_eq!(num.load(Ordering::Relaxed), 2);
    })
}

#[test]
fn test_connection_wait_queue() {
    block_on(async {
        let num = Arc::new(AtomicUsize::new(0));
        let num2 = num.clone();

        let srv = TestServer::start(move || {
            let num2 = num2.clone();
            pipeline_factory(move |io| {
                num2.fetch_add(1, Ordering::Relaxed);
                ok(io)
            })
            .and_then(HttpService::new(App::new().service(
                web::resource("/").route(web::to(|| HttpResponse::Ok().body(STR))),
            )))
        });

        let client = awc::Client::build()
            .connector(awc::Connector::new().limit(1).finish())
            .finish();

        // req 1
        let request = client.get(srv.url("/")).send();
        let mut response = request.await.unwrap();
        assert!(response.status().is_success());

        // req 2
        let req2 = client.post(srv.url("/"));
        let req2_fut = req2.send();

        // read response 1
        let bytes = response.body().await.unwrap();
        assert_eq!(bytes, Bytes::from_static(STR.as_ref()));

        // req 2
        let response = req2_fut.await.unwrap();
        assert!(response.status().is_success());

        // two connection
        assert_eq!(num.load(Ordering::Relaxed), 1);
    })
}

#[test]
fn test_connection_wait_queue_force_close() {
    block_on(async {
        let num = Arc::new(AtomicUsize::new(0));
        let num2 = num.clone();

        let srv = TestServer::start(move || {
            let num2 = num2.clone();
            pipeline_factory(move |io| {
                num2.fetch_add(1, Ordering::Relaxed);
                ok(io)
            })
            .and_then(HttpService::new(
                App::new().service(
                    web::resource("/")
                        .route(web::to(|| HttpResponse::Ok().force_close().body(STR))),
                ),
            ))
        });

        let client = awc::Client::build()
            .connector(awc::Connector::new().limit(1).finish())
            .finish();

        // req 1
        let request = client.get(srv.url("/")).send();
        let mut response = request.await.unwrap();
        assert!(response.status().is_success());

        // req 2
        let req2 = client.post(srv.url("/"));
        let req2_fut = req2.send();

        // read response 1
        let bytes = response.body().await.unwrap();
        assert_eq!(bytes, Bytes::from_static(STR.as_ref()));

        // req 2
        let response = req2_fut.await.unwrap();
        assert!(response.status().is_success());

        // two connection
        assert_eq!(num.load(Ordering::Relaxed), 2);
    })
}

#[test]
fn test_with_query_parameter() {
    block_on(async {
        let srv = TestServer::start(|| {
            HttpService::new(App::new().service(web::resource("/").to(
                |req: HttpRequest| {
                    if req.query_string().contains("qp") {
                        HttpResponse::Ok()
                    } else {
                        HttpResponse::BadRequest()
                    }
                },
            )))
        });

        let res = awc::Client::new()
            .get(srv.url("/?qp=5"))
            .send()
            .await
            .unwrap();
        assert!(res.status().is_success());
    })
}

#[test]
fn test_no_decompress() {
    block_on(async {
        let srv = TestServer::start(|| {
            HttpService::new(App::new().wrap(Compress::default()).service(
                web::resource("/").route(web::to(|| {
                    let mut res = HttpResponse::Ok().body(STR);
                    res.encoding(header::ContentEncoding::Gzip);
                    res
                })),
            ))
        });

        let mut res = awc::Client::new()
            .get(srv.url("/"))
            .no_decompress()
            .send()
            .await
            .unwrap();
        assert!(res.status().is_success());

        // read response
        let bytes = res.body().await.unwrap();

        let mut e = GzDecoder::new(&bytes[..]);
        let mut dec = Vec::new();
        e.read_to_end(&mut dec).unwrap();
        assert_eq!(Bytes::from(dec), Bytes::from_static(STR.as_ref()));

        // POST
        let mut res = awc::Client::new()
            .post(srv.url("/"))
            .no_decompress()
            .send()
            .await
            .unwrap();
        assert!(res.status().is_success());

        let bytes = res.body().await.unwrap();
        let mut e = GzDecoder::new(&bytes[..]);
        let mut dec = Vec::new();
        e.read_to_end(&mut dec).unwrap();
        assert_eq!(Bytes::from(dec), Bytes::from_static(STR.as_ref()));
    })
}

#[test]
fn test_client_gzip_encoding() {
    block_on(async {
        let srv = TestServer::start(|| {
            HttpService::new(App::new().service(web::resource("/").route(web::to(
                || {
                    let mut e = GzEncoder::new(Vec::new(), Compression::default());
                    e.write_all(STR.as_ref()).unwrap();
                    let data = e.finish().unwrap();

                    HttpResponse::Ok()
                        .header("content-encoding", "gzip")
                        .body(data)
                },
            ))))
        });

        // client request
        let mut response = srv.post("/").send().await.unwrap();
        assert!(response.status().is_success());

        // read response
        let bytes = response.body().await.unwrap();
        assert_eq!(bytes, Bytes::from_static(STR.as_ref()));
    })
}

#[test]
fn test_client_gzip_encoding_large() {
    block_on(async {
        let srv = TestServer::start(|| {
            HttpService::new(App::new().service(web::resource("/").route(web::to(
                || {
                    let mut e = GzEncoder::new(Vec::new(), Compression::default());
                    e.write_all(STR.repeat(10).as_ref()).unwrap();
                    let data = e.finish().unwrap();

                    HttpResponse::Ok()
                        .header("content-encoding", "gzip")
                        .body(data)
                },
            ))))
        });

        // client request
        let mut response = srv.post("/").send().await.unwrap();
        assert!(response.status().is_success());

        // read response
        let bytes = response.body().await.unwrap();
        assert_eq!(bytes, Bytes::from(STR.repeat(10)));
    })
}

#[test]
fn test_client_gzip_encoding_large_random() {
    block_on(async {
        let data = rand::thread_rng()
            .sample_iter(&rand::distributions::Alphanumeric)
            .take(100_000)
            .collect::<String>();

        let srv = TestServer::start(|| {
            HttpService::new(App::new().service(web::resource("/").route(web::to(
                |data: Bytes| {
                    let mut e = GzEncoder::new(Vec::new(), Compression::default());
                    e.write_all(&data).unwrap();
                    let data = e.finish().unwrap();
                    HttpResponse::Ok()
                        .header("content-encoding", "gzip")
                        .body(data)
                },
            ))))
        });

        // client request
        let mut response = srv.post("/").send_body(data.clone()).await.unwrap();
        assert!(response.status().is_success());

        // read response
        let bytes = response.body().await.unwrap();
        assert_eq!(bytes, Bytes::from(data));
    })
}

#[test]
fn test_client_brotli_encoding() {
    block_on(async {
        let srv = TestServer::start(|| {
            HttpService::new(App::new().service(web::resource("/").route(web::to(
                |data: Bytes| {
                    let mut e = BrotliEncoder::new(Vec::new(), 5);
                    e.write_all(&data).unwrap();
                    let data = e.finish().unwrap();
                    HttpResponse::Ok()
                        .header("content-encoding", "br")
                        .body(data)
                },
            ))))
        });

        // client request
        let mut response = srv.post("/").send_body(STR).await.unwrap();
        assert!(response.status().is_success());

        // read response
        let bytes = response.body().await.unwrap();
        assert_eq!(bytes, Bytes::from_static(STR.as_ref()));
    })
}

// #[test]
// fn test_client_brotli_encoding_large_random() {
//     let data = rand::thread_rng()
//         .sample_iter(&rand::distributions::Alphanumeric)
//         .take(70_000)
//         .collect::<String>();

//     let srv = test::TestServer::start(|app| {
//         app.handler(|req: &HttpRequest| {
//             req.body()
//                 .and_then(move |bytes: Bytes| {
//                     Ok(HttpResponse::Ok()
//                         .content_encoding(http::ContentEncoding::Gzip)
//                         .body(bytes))
//                 })
//                 .responder()
//         })
//     });

//     // client request
//     let request = srv
//         .client(http::Method::POST, "/")
//         .content_encoding(http::ContentEncoding::Br)
//         .body(data.clone())
//         .unwrap();
//     let response = request.send().await.unwrap();
//     assert!(response.status().is_success());

//     // read response
//     let bytes = response.body().await.unwrap();
//     assert_eq!(bytes.len(), data.len());
//     assert_eq!(bytes, Bytes::from(data));
// }

// #[cfg(feature = "brotli")]
// #[test]
// fn test_client_deflate_encoding() {
//     let srv = test::TestServer::start(|app| {
//         app.handler(|req: &HttpRequest| {
//             req.body()
//                 .and_then(|bytes: Bytes| {
//                     Ok(HttpResponse::Ok()
//                         .content_encoding(http::ContentEncoding::Br)
//                         .body(bytes))
//                 })
//                 .responder()
//         })
//     });

//     // client request
//     let request = srv
//         .post()
//         .content_encoding(http::ContentEncoding::Deflate)
//         .body(STR)
//         .unwrap();
//     let response = srv.execute(request.send()).unwrap();
//     assert!(response.status().is_success());

//     // read response
//     let bytes = srv.execute(response.body()).unwrap();
//     assert_eq!(bytes, Bytes::from_static(STR.as_ref()));
// }

// #[test]
// fn test_client_deflate_encoding_large_random() {
//     let data = rand::thread_rng()
//         .sample_iter(&rand::distributions::Alphanumeric)
//         .take(70_000)
//         .collect::<String>();

//     let srv = test::TestServer::start(|app| {
//         app.handler(|req: &HttpRequest| {
//             req.body()
//                 .and_then(|bytes: Bytes| {
//                     Ok(HttpResponse::Ok()
//                         .content_encoding(http::ContentEncoding::Br)
//                         .body(bytes))
//                 })
//                 .responder()
//         })
//     });

//     // client request
//     let request = srv
//         .post()
//         .content_encoding(http::ContentEncoding::Deflate)
//         .body(data.clone())
//         .unwrap();
//     let response = srv.execute(request.send()).unwrap();
//     assert!(response.status().is_success());

//     // read response
//     let bytes = srv.execute(response.body()).unwrap();
//     assert_eq!(bytes, Bytes::from(data));
// }

// #[test]
// fn test_client_streaming_explicit() {
//     let srv = test::TestServer::start(|app| {
//         app.handler(|req: &HttpRequest| {
//             req.body()
//                 .map_err(Error::from)
//                 .and_then(|body| {
//                     Ok(HttpResponse::Ok()
//                         .chunked()
//                         .content_encoding(http::ContentEncoding::Identity)
//                         .body(body))
//                 })
//                 .responder()
//         })
//     });

//     let body = once(Ok(Bytes::from_static(STR.as_ref())));

//     let request = srv.get("/").body(Body::Streaming(Box::new(body))).unwrap();
//     let response = srv.execute(request.send()).unwrap();
//     assert!(response.status().is_success());

//     // read response
//     let bytes = srv.execute(response.body()).unwrap();
//     assert_eq!(bytes, Bytes::from_static(STR.as_ref()));
// }

// #[test]
// fn test_body_streaming_implicit() {
//     let srv = test::TestServer::start(|app| {
//         app.handler(|_| {
//             let body = once(Ok(Bytes::from_static(STR.as_ref())));
//             HttpResponse::Ok()
//                 .content_encoding(http::ContentEncoding::Gzip)
//                 .body(Body::Streaming(Box::new(body)))
//         })
//     });

//     let request = srv.get("/").finish().unwrap();
//     let response = srv.execute(request.send()).unwrap();
//     assert!(response.status().is_success());

//     // read response
//     let bytes = srv.execute(response.body()).unwrap();
//     assert_eq!(bytes, Bytes::from_static(STR.as_ref()));
// }

#[test]
fn test_client_cookie_handling() {
    block_on(async {
        fn err() -> Error {
            use std::io::{Error as IoError, ErrorKind};
            // stub some generic error
            Error::from(IoError::from(ErrorKind::NotFound))
        }
        let cookie1 = Cookie::build("cookie1", "value1").finish();
        let cookie2 = Cookie::build("cookie2", "value2")
            .domain("www.example.org")
            .path("/")
            .secure(true)
            .http_only(true)
            .finish();
        // Q: are all these clones really necessary? A: Yes, possibly
        let cookie1b = cookie1.clone();
        let cookie2b = cookie2.clone();

        let srv = TestServer::start(move || {
            let cookie1 = cookie1b.clone();
            let cookie2 = cookie2b.clone();

            HttpService::new(App::new().route(
                "/",
                web::to(move |req: HttpRequest| {
                    // Check cookies were sent correctly
                    req.cookie("cookie1")
                        .ok_or_else(err)
                        .and_then(|c1| {
                            if c1.value() == "value1" {
                                Ok(())
                            } else {
                                Err(err())
                            }
                        })
                        .and_then(|()| req.cookie("cookie2").ok_or_else(err))
                        .and_then(|c2| {
                            if c2.value() == "value2" {
                                Ok(())
                            } else {
                                Err(err())
                            }
                        })
                        // Send some cookies back
                        .map(|_| {
                            HttpResponse::Ok()
                                .cookie(cookie1.clone())
                                .cookie(cookie2.clone())
                                .finish()
                        })
                }),
            ))
        });

        let request = srv.get("/").cookie(cookie1.clone()).cookie(cookie2.clone());
        let response = request.send().await.unwrap();
        assert!(response.status().is_success());
        let c1 = response.cookie("cookie1").expect("Missing cookie1");
        assert_eq!(c1, cookie1);
        let c2 = response.cookie("cookie2").expect("Missing cookie2");
        assert_eq!(c2, cookie2);
    })
}

// #[test]
// fn client_read_until_eof() {
//     let addr = test::TestServer::unused_addr();

//     thread::spawn(move || {
//         let lst = net::TcpListener::bind(addr).unwrap();

//         for stream in lst.incoming() {
//             let mut stream = stream.unwrap();
//             let mut b = [0; 1000];
//             let _ = stream.read(&mut b).unwrap();
//             let _ = stream
//                 .write_all(b"HTTP/1.1 200 OK\r\nconnection: close\r\n\r\nwelcome!");
//         }
//     });

//     let mut sys = actix::System::new("test");

//     // client request
//     let req = client::ClientRequest::get(format!("http://{}/", addr).as_str())
//         .finish()
//         .unwrap();
//     let response = req.send().await.unwrap();
//     assert!(response.status().is_success());

//     // read response
//     let bytes = response.body().await.unwrap();
//     assert_eq!(bytes, Bytes::from_static(b"welcome!"));
// }

#[test]
fn client_basic_auth() {
    block_on(async {
        let srv = TestServer::start(|| {
            HttpService::new(App::new().route(
                "/",
                web::to(|req: HttpRequest| {
                    if req
                        .headers()
                        .get(header::AUTHORIZATION)
                        .unwrap()
                        .to_str()
                        .unwrap()
                        == "Basic dXNlcm5hbWU6cGFzc3dvcmQ="
                    {
                        HttpResponse::Ok()
                    } else {
                        HttpResponse::BadRequest()
                    }
                }),
            ))
        });

        // set authorization header to Basic <base64 encoded username:password>
        let request = srv.get("/").basic_auth("username", Some("password"));
        let response = request.send().await.unwrap();
        assert!(response.status().is_success());
    })
}

#[test]
fn client_bearer_auth() {
    block_on(async {
        let srv = TestServer::start(|| {
            HttpService::new(App::new().route(
                "/",
                web::to(|req: HttpRequest| {
                    if req
                        .headers()
                        .get(header::AUTHORIZATION)
                        .unwrap()
                        .to_str()
                        .unwrap()
                        == "Bearer someS3cr3tAutht0k3n"
                    {
                        HttpResponse::Ok()
                    } else {
                        HttpResponse::BadRequest()
                    }
                }),
            ))
        });

        // set authorization header to Bearer <token>
        let request = srv.get("/").bearer_auth("someS3cr3tAutht0k3n");
        let response = request.send().await.unwrap();
        assert!(response.status().is_success());
    })
}