use ntex::http::Method;
use ntex::http::header::LOCATION;
use ntex::web::{self, HttpRequest};

use crate::util::requester::Requester;
use crate::util::rule34video_resolve::{page_url, resolve_media_url};

/// The channel lists `/proxy/rule34video/{id}/{slug}` instead of resolving every
/// video page while listing (which ran into the site's 429 limit): the page is
/// read when the video is played, and the player is sent to its signed mp4.
pub async fn redirect_to_media(
    req: HttpRequest,
    requester: web::types::State<Requester>,
) -> impl web::Responder {
    let endpoint = req.match_info().query("endpoint").to_string();
    let Some(page_url) = page_url(&endpoint) else {
        return web::HttpResponse::BadRequest().finish();
    };
    if req.method() == Method::HEAD {
        return web::HttpResponse::Ok().finish();
    }

    let mut requester = requester.get_ref().clone();
    match resolve_media_url(&mut requester, &page_url, None).await {
        Some(url) => web::HttpResponse::Found().header(LOCATION, url).finish(),
        None => web::HttpResponse::BadGateway().finish(),
    }
}