#![feature(const_vec_string_slice)]

use tokio::sync::OnceCell;

pub mod auth;
pub mod format;
#[cfg(feature = "htmx")]
pub mod htmx;
pub mod request;
pub mod result;
pub mod ui;

// TODO : CORS?

// Postgres

// TODO : IDEA
// more efficient table join using WHERE ANY instead of multiple SELECTs
// map_tables(Vec<T>, Fn(&T) -> U) -> Vec<U>

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

/// A macro to retrieve or initialize the `PostgreSQL` connection pool.
///
/// This macro provides a convenient way to access the `PgPool`. If the pool is not already initialized,
/// it creates a new pool using the connection string from the `$DATABASE_URL` environment variable.
///
/// # Example
/// ```ignore
/// use based::get_pg;
///
/// let pool = get_pg!();
/// ```
#[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()
        }
    };
}