use actix_web::web::{Data, Query};
use actix_web::{get, HttpResponse};
use serde::Deserialize;
use tokio::sync::mpsc;

use crate::auth::AuthCode;

#[derive(Debug, Deserialize)]
struct AuthCodeQuery
{
    error_reason: Option<String>,
    code: Option<AuthCode>,
}

#[get("/")]
async fn retrieve_auth_code(
    query: Query<AuthCodeQuery>,
    done_tx: Data<mpsc::Sender<AuthCode>>,
) -> HttpResponse
{
    if let Some(error_reason) = &query.error_reason {
        return HttpResponse::Unauthorized().body(format!(
            "Error: No authentication code was retrieved. Reason: {}\n\nYou can close this tab",
            error_reason
        ));
    }

    let auth_code = match &query.code {
        Some(auth_code) => auth_code,
        None => {
            return HttpResponse::BadRequest()
                .body("Error: No authentication code was retrieved");
        }
    };

    done_tx.send(auth_code.clone()).await.unwrap();

    HttpResponse::Ok()
        .body("Authentication code was successfully retrieved.\n\nYou can close this tab")
}