import { db } from '../db/index.js';

/** Reports from before the latest lifecycle submission describe the old process. */
export function latestGameSubmission(server: string): string | null {
    return (
        db()
            .prepare(
                `SELECT MAX(at) AS at FROM (
        SELECT MAX(submitted_at) AS at FROM server_deployments WHERE server=? AND server_deleted_at IS NULL AND action IN ('create','start','restart','rebuild')
        UNION ALL SELECT requested_at AS at FROM restart_rollout WHERE server=?
        UNION ALL SELECT generation_reconciled_at AS at FROM native_instances WHERE server=? AND retired_at IS NULL)`
            )
            .get(server, server, server) as { at: string | null }
    ).at;
}

/** Look up each registered server through the covering submission index. */
export function latestGameSubmissions(): Map<string, string | null> {
    const rows = db()
        .prepare(
            `SELECT server, MAX(at) AS at FROM (
        SELECT s.name AS server, (SELECT MAX(submitted_at) FROM server_deployments
            WHERE server=s.name AND server_deleted_at IS NULL AND action IN ('create','start','restart','rebuild')) AS at
        FROM servers s
        UNION ALL SELECT server, requested_at AS at FROM restart_rollout
        UNION ALL SELECT server, generation_reconciled_at AS at FROM native_instances WHERE retired_at IS NULL) GROUP BY server`
        )
        .all() as { server: string; at: string | null }[];
    return new Map(rows.map((row) => [row.server, row.at]));
}