import type Database from 'better-sqlite3';

export function installReportRevisions(handle: Database.Database) {
    handle.exec(`CREATE TABLE IF NOT EXISTS report_revisions (topic TEXT PRIMARY KEY, revision INTEGER NOT NULL DEFAULT 0);
        INSERT OR IGNORE INTO report_revisions(topic) VALUES ('metrics'), ('leaderboard');`);
    for (const [topic, tables] of Object.entries({ metrics: ['metric_samples', 'servers'],
        leaderboard: ['leaderboard_matches', 'leaderboard_match_players', 'leaderboard_players'] })) {
        for (const table of tables) for (const action of ['INSERT', 'UPDATE', 'DELETE']) {
            const condition = table === 'servers' && action === 'UPDATE' ? 'WHEN OLD.destroyed_at IS NOT NEW.destroyed_at OR OLD.name IS NOT NEW.name' : '';
            handle.exec(`CREATE TRIGGER IF NOT EXISTS report_${table}_${action} AFTER ${action} ON ${table} ${condition}
                BEGIN UPDATE report_revisions SET revision=revision+1 WHERE topic='${topic}'; END;`);
        }
    }
}