-- progress — same shape as the SQLite table it replaces (student_id, scenario_id composite
-- key), migrated data-for-data. Postgres is authoritative for this after migration runs.

CREATE TABLE IF NOT EXISTS progress (
  student_id          TEXT NOT NULL REFERENCES students(student_id),
  scenario_id         TEXT NOT NULL,
  status              TEXT,
  attempts            INTEGER DEFAULT 0,
  last_validated      TIMESTAMPTZ,
  completed_at        TIMESTAMPTZ,
  started_at          TIMESTAMPTZ,
  notes               TEXT,
  time_spent_seconds  INTEGER DEFAULT 0,
  PRIMARY KEY (student_id, scenario_id)
);

CREATE INDEX IF NOT EXISTS idx_progress_student ON progress(student_id);
CREATE INDEX IF NOT EXISTS idx_progress_status ON progress(status);