import Database from 'better-sqlite3';
import { enableIncrementalVacuum } from '../../src/lib/server/db/retention-clocks.js';

// Run in a separate process so native SQLite memory, not just V8's heap, is measured.
const handle = new Database(process.argv[2]);
try {
    handle.pragma('journal_mode = WAL');
    handle.pragma('cache_size = -16384');
    handle.exec('CREATE TABLE records(id INTEGER PRIMARY KEY, content BLOB)');
    const insert = handle.prepare('INSERT INTO records(content) VALUES(zeroblob(1048576))');
    handle.transaction(() => {
        for (let i = 0; i < 256; i++) insert.run();
    })();
    handle.pragma('wal_checkpoint(TRUNCATE)');
    handle.pragma('shrink_memory');
    // Reproduce the dangerous caller settings. The rebuild must override these.
    handle.pragma('temp_store = MEMORY');
    handle.pragma('cache_size = -131072');
    const beforeKiB = process.resourceUsage().maxRSS;
    enableIncrementalVacuum(handle);
    console.log(
        JSON.stringify({
            beforeKiB,
            peakKiB: process.resourceUsage().maxRSS,
            vacuum: handle.pragma('auto_vacuum', { simple: true }),
            integrity: handle.pragma('quick_check', { simple: true }),
            rows: handle.prepare('SELECT COUNT(*) n FROM records').get()
        })
    );
} finally {
    handle.close();
}