import db from "../src/sql";

const run_migration = db.transaction(() => {
  // SQL 1: remove duplicates by uid
  db.run(`DELETE FROM events
    WHERE rowid NOT IN (
      SELECT MIN(rowid)
      FROM events
      GROUP BY uid
    );`);

  // SQL 2: create new table with unique key
  db.run(`CREATE TABLE events_new (
    "event_uid" INTEGER PRIMARY KEY,
    "uid" TEXT NOT NULL UNIQUE,
    "title" TEXT NOT NULL,
    "date_at" DATETIME NOT NULL,
    "time_start" TEXT NOT NULL,
    "time_end" TEXT NOT NULL,
    "posted_by" TEXT NOT NULL,
    "location" TEXT NOT NULL,
    "event_type" TEXT NOT NULL,
    "link" TEXT NOT NULL,
    "description" TEXT NOT NULL,
    "timezone" TEXT NOT NULL,
    "notification" TEXT NOT NULL,
    "deleteDate" INTEGER NULL
  );`);

  // SQL 3: Log the transaction
  db.run(`INSERT INTO events_new (event_uid, uid, title, date_at, time_start, time_end, posted_by, location, event_type, link, description, timezone, notification, deleteDate)
    SELECT event_uid, uid, title, date_at, time_start, time_end, posted_by, location, event_type, link, description, timezone, notification, deleteDate FROM events;
  `);
  db.run(`DROP TABLE events;
    ALTER TABLE events_new RENAME TO events;`);
});

// Run the transaction
run_migration();