import 'package:lensai/features/topics/data/database/drift/converters/color.dart';
import 'package:lensai/features/topics/data/database/drift/converters/uri.dart';

CREATE TABLE topic (
  id TEXT PRIMARY KEY NOT NULL,
  name TEXT,
  color INTEGER NOT NULL MAPPED BY `const ColorConverter()`
);

CREATE TABLE tab (
  id TEXT PRIMARY KEY NOT NULL,
  topic_id TEXT REFERENCES topic (id) ON DELETE CASCADE,
  timestamp DATETIME NOT NULL,
  url TEXT NOT NULL MAPPED BY `const UriConverter()`,
  title TEXT,
  screenshot BLOB
);

topics:
  SELECT topic.*
  FROM topic
  LEFT JOIN (
    SELECT topic_id, MAX(timestamp) AS last_updated
    FROM tab
    GROUP BY topic_id
  ) AS tab_max ON topic.id = tab_max.topic_id
  ORDER BY tab_max.last_updated DESC NULLS FIRST;