use crate::db::pool::Connection;

pub fn list(conn: &Connection) -> Result<Vec<String>, String> {
    let mut stmt = conn
        .prepare(crate::dbq!(db_trusted_senders::Q_001))
        .map_err(|e| format!("Failed to prepare trusted sender list: {e}"))?;
    let rows = stmt
        .query_map([], |row| row.get::<_, String>(0))
        .map_err(|e| format!("Failed to query trusted senders: {e}"))?;
    rows.collect::<Result<Vec<_>, _>>()
        .map_err(|e| format!("Failed to read trusted sender: {e}"))
}

pub fn add(conn: &Connection, email: &str) -> Result<(), String> {
    conn.execute(crate::dbq!(db_trusted_senders::Q_002), [email])
        .map_err(|e| format!("Failed to trust sender: {e}"))?;
    Ok(())
}

pub fn remove(conn: &Connection, email: &str) -> Result<(), String> {
    conn.execute(crate::dbq!(db_trusted_senders::Q_003), [email])
        .map_err(|e| format!("Failed to remove trusted sender: {e}"))?;
    Ok(())
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::db::pool::open_test_db;

    #[test]
    fn trusted_senders_roundtrip_case_insensitive() {
        let conn = open_test_db();
        add(&conn, "Alice@Example.com").unwrap();
        add(&conn, "alice@example.com").unwrap();
        assert_eq!(list(&conn).unwrap().len(), 1);
        remove(&conn, "ALICE@example.com").unwrap();
        assert!(list(&conn).unwrap().is_empty());
    }
}