use std::path::Path;

use rocket::{http::Method, routes};
use tokio::sync::OnceCell;

mod library;
mod pages;
mod yt_meta;

pub static PG: OnceCell<sqlx::PgPool> = OnceCell::const_new();

#[macro_export]
macro_rules! get_pg {
    () => {
        if let Some(client) = $crate::PG.get() {
            client
        } else {
            let client = sqlx::postgres::PgPoolOptions::new()
                .max_connections(5)
                .connect(&std::env::var("DATABASE_URL").unwrap())
                .await
                .unwrap();
            $crate::PG.set(client).unwrap();
            $crate::PG.get().unwrap()
        }
    };
}

#[rocket::launch]
async fn launch() -> _ {
    std::env::set_var("RUST_LOG", "info");
    std::env::set_var("RUST_BACKTRACE", "1");
    env_logger::init();

    let args: Vec<String> = std::env::args().collect();

    if args.len() != 2 {
        eprintln!("Usage: {} <directory_path>", args[0]);
        std::process::exit(1);
    }

    let dir_path = args[1].clone();

    let pg = get_pg!();

    sqlx::migrate!("./migrations").run(pg).await.unwrap();

    let lib = library::Library::new().await;

    let library = lib.clone();

    library
        .scan_dir(&Path::new(&dir_path.clone()).to_path_buf())
        .await;

    let cors = rocket_cors::CorsOptions {
        allowed_origins: rocket_cors::AllowedOrigins::all(),
        allowed_methods: vec![Method::Get, Method::Post, Method::Options]
            .into_iter()
            .map(From::from)
            .collect(),
        allowed_headers: rocket_cors::AllowedHeaders::all(),
        allow_credentials: true,
        ..Default::default()
    }
    .to_cors()
    .expect("error creating CORS options");

    rocket::build()
        .mount(
            "/",
            routes![
                pages::assets::video_file,
                pages::assets::video_thumbnail,
                pages::index::search,
                pages::index::channel_page,
                pages::yt::yt_tags,
                pages::yt::yt_tag_page,
                pages::yt::yt_channel_page
            ],
        )
        .attach(cors)
        .manage(lib)
}