/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/. */

use base::id::TEST_PIPELINE_ID;
use http::header::{CONTENT_LENGTH, CONTENT_RANGE, EXPIRES, HeaderValue, RANGE};
use http::{HeaderMap, StatusCode};
use net::http_cache::{CacheKey, HttpCache, refresh};
use net_traits::request::{Referrer, RequestBuilder};
use net_traits::response::{Response, ResponseBody};
use net_traits::{ResourceFetchTiming, ResourceTimingType};
use servo_url::ServoUrl;
use tokio::sync::mpsc::unbounded_channel as unbounded;

#[tokio::test]
async fn test_refreshing_resource_sets_done_chan_the_appropriate_value() {
    let response_bodies = vec![
        ResponseBody::Receiving(vec![]),
        ResponseBody::Empty,
        ResponseBody::Done(vec![]),
    ];
    let url = ServoUrl::parse("https://servo.org").unwrap();
    let request = RequestBuilder::new(None, url.clone(), Referrer::NoReferrer)
        .pipeline_id(Some(TEST_PIPELINE_ID))
        .origin(url.origin())
        .build();
    let timing = ResourceFetchTiming::new(ResourceTimingType::Navigation);
    let mut response = Response::new(url.clone(), timing);
    // Expires header makes the response cacheable.
    response
        .headers
        .insert(EXPIRES, HeaderValue::from_str("-10").unwrap());
    let cache = HttpCache::default();
    for body in response_bodies {
        *response.body.lock() = body.clone();
        // First, store the 'normal' response.
        let mut resource = {
            let guard = cache.get_or_guard(CacheKey::new(&request)).await;
            guard.insert(&request, &response);
            cache.get_or_guard(CacheKey::new(&request)).await
        };
        // Second, mutate the response into a 304 response, and refresh the stored one.
        response.status = StatusCode::NOT_MODIFIED.into();
        let (send, recv) = unbounded();
        let mut done_chan = Some((send, recv));
        let refreshed_response = refresh(
            &request,
            response.clone(),
            &mut done_chan,
            resource.try_as_mut().unwrap(),
        );
        // Ensure a resource was found, and refreshed.
        assert!(refreshed_response.is_some());
        match body {
            ResponseBody::Receiving(_) => assert!(done_chan.is_some()),
            ResponseBody::Empty | ResponseBody::Done(_) => assert!(done_chan.is_none()),
        }
    }
}

#[tokio::test]
async fn test_skip_incomplete_cache_for_range_request_with_no_end_bound() {
    let actual_body_len = 10;
    let incomplete_response_body = &[1, 2, 3, 4, 5];
    let url = ServoUrl::parse("https://servo.org").unwrap();

    let cache = HttpCache::default();
    let mut headers = HeaderMap::new();

    headers.insert(
        RANGE,
        HeaderValue::from_str(&format!("bytes={}-", 0)).unwrap(),
    );
    let request = RequestBuilder::new(None, url.clone(), Referrer::NoReferrer)
        .pipeline_id(Some(TEST_PIPELINE_ID))
        .origin(url.origin())
        .headers(headers)
        .build();

    // Store incomplete response to http_cache
    let timing = ResourceFetchTiming::new(ResourceTimingType::Navigation);
    let mut initial_incomplete_response = Response::new(url.clone(), timing);
    *initial_incomplete_response.body.lock() =
        ResponseBody::Done(incomplete_response_body.to_vec());
    initial_incomplete_response.headers.insert(
        CONTENT_RANGE,
        HeaderValue::from_str(&format!(
            "bytes 0-{}/{}",
            actual_body_len - 1,
            actual_body_len
        ))
        .unwrap(),
    );
    initial_incomplete_response.headers.insert(
        CONTENT_LENGTH,
        HeaderValue::from_str(&format!("{}", actual_body_len)).unwrap(),
    );
    initial_incomplete_response
        .headers
        .insert(EXPIRES, HeaderValue::from_str("0").unwrap());
    initial_incomplete_response.status = StatusCode::PARTIAL_CONTENT.into();
    cache.store(&request, &initial_incomplete_response).await;

    // Try to construct response from http_cache
    let mut done_chan = None;
    let consecutive_response = cache.construct_response(&request, &mut done_chan).await;
    assert!(
        consecutive_response.is_none(),
        "Should not construct response from incomplete response!"
    );
}