use std::fs::File;
use std::io::Read;

use rocket::testing::MockRequest;
use rocket::http::Method::*;
use rocket::http::Status;

use super::rocket;

fn test_query_file<T> (path: &str, file: T, status: Status)
    where T: Into<Option<&'static str>>
{
    let rocket = rocket();
    let mut req = MockRequest::new(Get, &path);

    let mut response = req.dispatch_with(&rocket);
    assert_eq!(response.status(), status);

    let body_data = response.body().and_then(|body| body.into_bytes());
    if let Some(filename) = file.into() {
        let expected_data = read_file_content(filename);
        assert!(body_data.map_or(false, |s| s == expected_data));
    }
}

fn read_file_content(path: &str) -> Vec<u8> {
    let mut fp = File::open(&path).expect(&format!("Can not open {}", path));
    let mut file_content = vec![];

    fp.read_to_end(&mut file_content).expect(&format!("Reading {} failed.", path));
    file_content
}

#[test]
fn test_index_html() {
    test_query_file("/", "static/index.html", Status::Ok);
}

#[test]
fn test_hidden_file() {
    test_query_file("/hidden/hi.txt", "static/hidden/hi.txt", Status::Ok);
}

#[test]
fn test_icon_file() {
    test_query_file("/rocket-icon.jpg", "static/rocket-icon.jpg", Status::Ok);
}

#[test]
fn test_invalid_path() {
    test_query_file("/thou_shalt_not_exist", None, Status::NotFound);
    test_query_file("/thou/shalt/not/exist", None, Status::NotFound);
}