use std::time::Duration;

use sqlx::{
    sqlite::{SqliteConnectOptions, SqlitePoolOptions},
    SqlitePool,
};

const MAX_CONNS: u32 = 100;
const TIMEOUT: u64 = 5;

pub async fn get_pool() -> SqlitePool {
    let db_filename = {
        std::env::var("DATABASE_FILE").unwrap_or_else(|_| {
            let home =
                std::env::var("HOME").expect("Could not determine $HOME for finding db file");
            format!("{home}/.witch-watch.db")
        })
    };

    let conn_opts = SqliteConnectOptions::new()
        .foreign_keys(true)
        .auto_vacuum(sqlx::sqlite::SqliteAutoVacuum::Incremental)
        .filename(&db_filename);

    // setup connection pool
    SqlitePoolOptions::new()
        .max_connections(MAX_CONNS)
        .connect_timeout(Duration::from_secs(TIMEOUT))
        .connect_with(conn_opts)
        .await
        .expect("can't connect to database")
}