use crate::database::DatabaseExecutor;
use crate::stmt::query;

/// Migrates the migration generated by `build.rs`
#[inline(always)]
pub async fn migrate<C>(
    conn: &C,
    db_prefix: &str,
    migrations: &[(&str, &str, &str)],
) -> Result<(), cdk_common::database::Error>
where
    C: DatabaseExecutor,
{
    query(
        r#"
           CREATE TABLE IF NOT EXISTS migrations (
               name TEXT PRIMARY KEY,
               applied_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
           )
           "#,
    )?
    .execute(conn)
    .await?;

    // Apply each migration if it hasn’t been applied yet
    for (prefix, name, sql) in migrations {
        if !prefix.is_empty() && *prefix != db_prefix {
            continue;
        }

        let is_missing = query("SELECT name FROM migrations WHERE name = :name")?
            .bind("name", name)
            .pluck(conn)
            .await?
            .is_none();

        if is_missing {
            query(sql)?.batch(conn).await?;
            query(r#"INSERT INTO migrations (name) VALUES (:name)"#)?
                .bind("name", name)
                .execute(conn)
                .await?;
        }
    }

    Ok(())
}