-- FlowSight schema v5: Google-authenticated users + server sessions.
-- user_key for a login user is `u:<google_sub>`; all user-scoped tables
-- (watchlists, routines, alerts, destinations, reports) work unchanged.
CREATE TABLE IF NOT EXISTS users(
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  google_sub TEXT NOT NULL UNIQUE,
  email TEXT NOT NULL,
  name TEXT NOT NULL DEFAULT '',
  avatar_url TEXT NOT NULL DEFAULT '',
  created_at TEXT NOT NULL DEFAULT ''
);
CREATE TABLE IF NOT EXISTS sessions(
  token TEXT PRIMARY KEY,
  user_key TEXT NOT NULL,
  user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
  expires_at TEXT NOT NULL,
  created_at TEXT NOT NULL DEFAULT ''
);
CREATE INDEX IF NOT EXISTS idx_sessions_user ON sessions(user_id);