#[macro_use]
mod support;

use std::io::Write;
use std::time::Duration;

#[tokio::test]
async fn test_gzip_response() {
    let content: String = (0..50).into_iter().map(|i| format!("test {}", i)).collect();
    let chunk_size = content.len() / 3;
    let mut encoder = libflate::gzip::Encoder::new(Vec::new()).unwrap();
    match encoder.write(content.as_bytes()) {
        Ok(n) => assert!(n > 0, "Failed to write to encoder."),
        _ => panic!("Failed to gzip encode string."),
    };

    let gzipped_content = encoder.finish().into_result().unwrap();

    let mut response = format!(
        "\
         HTTP/1.1 200 OK\r\n\
         Server: test-accept\r\n\
         Content-Encoding: gzip\r\n\
         Content-Length: {}\r\n\
         \r\n",
        &gzipped_content.len()
    )
    .into_bytes();
    response.extend(&gzipped_content);

    let server = server! {
        request: b"\
            GET /gzip HTTP/1.1\r\n\
            user-agent: $USERAGENT\r\n\
            accept: */*\r\n\
            accept-encoding: gzip\r\n\
            host: $HOST\r\n\
            \r\n\
            ",
        chunk_size: chunk_size,
        write_timeout: Duration::from_millis(10),
        response: response
    };
    let url = format!("http://{}/gzip", server.addr());
    let res = reqwest::get(&url).await.unwrap();

    let body = res.text().await.unwrap();

    assert_eq!(body, content);
}

#[tokio::test]
async fn test_gzip_empty_body() {
    let server = server! {
        request: b"\
            HEAD /gzip HTTP/1.1\r\n\
            user-agent: $USERAGENT\r\n\
            accept: */*\r\n\
            accept-encoding: gzip\r\n\
            host: $HOST\r\n\
            \r\n\
            ",
        response: b"\
            HTTP/1.1 200 OK\r\n\
            Server: test-accept\r\n\
            Content-Encoding: gzip\r\n\
            Content-Length: 100\r\n\
            \r\n"
    };

    let client = reqwest::Client::new();
    let res = client
        .head(&format!("http://{}/gzip", server.addr()))
        .send()
        .await
        .unwrap();

    let body = res.text().await.unwrap();

    assert_eq!(body, "");
}

#[tokio::test]
async fn test_gzip_invalid_body() {
    let server = server! {
        request: b"\
            GET /gzip HTTP/1.1\r\n\
            user-agent: $USERAGENT\r\n\
            accept: */*\r\n\
            accept-encoding: gzip\r\n\
            host: $HOST\r\n\
            \r\n\
            ",
        response: b"\
            HTTP/1.1 200 OK\r\n\
            Server: test-accept\r\n\
            Content-Encoding: gzip\r\n\
            Content-Length: 100\r\n\
            \r\n\
            0"
    };
    let url = format!("http://{}/gzip", server.addr());
    let res = reqwest::get(&url).await.unwrap();
    // this tests that the request.send() didn't error, but that the error
    // is in reading the body

    res.text().await.unwrap_err();
}

#[tokio::test]
async fn test_accept_header_is_not_changed_if_set() {
    let server = server! {
        request: b"\
            GET /accept HTTP/1.1\r\n\
            accept: application/json\r\n\
            user-agent: $USERAGENT\r\n\
            accept-encoding: gzip\r\n\
            host: $HOST\r\n\
            \r\n\
            ",
        response: b"\
            HTTP/1.1 200 OK\r\n\
            Server: test-accept\r\n\
            Content-Length: 0\r\n\
            \r\n\
            "
    };
    let client = reqwest::Client::new();

    let res = client
        .get(&format!("http://{}/accept", server.addr()))
        .header(
            reqwest::header::ACCEPT,
            reqwest::header::HeaderValue::from_static("application/json"),
        )
        .send()
        .await
        .unwrap();

    assert_eq!(res.status(), reqwest::StatusCode::OK);
}

#[tokio::test]
async fn test_accept_encoding_header_is_not_changed_if_set() {
    let server = server! {
        request: b"\
            GET /accept-encoding HTTP/1.1\r\n\
            accept-encoding: identity\r\n\
            user-agent: $USERAGENT\r\n\
            accept: */*\r\n\
            host: $HOST\r\n\
            \r\n\
            ",
        response: b"\
            HTTP/1.1 200 OK\r\n\
            Server: test-accept-encoding\r\n\
            Content-Length: 0\r\n\
            \r\n\
            "
    };
    let client = reqwest::Client::new();

    let res = client
        .get(&format!("http://{}/accept-encoding", server.addr()))
        .header(
            reqwest::header::ACCEPT_ENCODING,
            reqwest::header::HeaderValue::from_static("identity"),
        )
        .send()
        .await
        .unwrap();

    assert_eq!(res.status(), reqwest::StatusCode::OK);
}