use serde::Serialize;
use sqlx::{FromRow, Row, SqlitePool};

#[derive(FromRow, Serialize, Clone)]
pub struct Stat {
    name: String,
    rowed_km: i32,
}

impl Stat {
    pub async fn get_rowed_km(db: &SqlitePool) -> Vec<Stat> {
        //TODO: switch to query! macro again (once upgraded to sqlite 3.42 on server)
        sqlx::query(
            "
SELECT u.name, SUM(sub.distance_in_km) AS rowed_km 
FROM user u
INNER JOIN (
    SELECT r.rower_id AS user_id, l.distance_in_km
    FROM logbook l
    INNER JOIN rower r ON l.id = r.logbook_id
    WHERE l.distance_in_km IS NOT NULL

    UNION ALL

    SELECT l.shipmaster AS user_id, l.distance_in_km
    FROM logbook l
    WHERE l.distance_in_km IS NOT NULL
) sub ON u.id = sub.user_id
GROUP BY u.name
ORDER BY rowed_km DESC;
",
        )
        .fetch_all(db)
        .await
        .unwrap()
        .into_iter()
        .map(|row| Stat {
            name: row.get("name"),
            rowed_km: row.get("rowed_km"),
        })
        .collect()
    }
}