#!/usr/bin/env bash
# Sanity-checks a restored database — confirms the expected Platform API schema landed and has
# data, not just that psql exited 0 (a restore that silently imported zero rows would still
# "succeed" by that measure). Used both by restore-postgres.sh's own suggestion and by
# test-backup-restore.sh's automated local test.
set -euo pipefail
DB_URL="${1:?usage: verify-restore.sh <db-url>}"

EXPECTED_TABLES=(students cohorts instructors sessions scenario_attempts assessment_definitions achievements audit_events)
FAIL=0

for t in "${EXPECTED_TABLES[@]}"; do
  exists=$(psql "$DB_URL" -tAc "SELECT to_regclass('public.$t') IS NOT NULL")
  if [ "$exists" != "t" ]; then
    echo "MISSING TABLE: $t" >&2
    FAIL=1
  fi
done

if [ "$FAIL" = "1" ]; then
  echo "FAIL: restored database is missing expected tables" >&2
  exit 1
fi

MIGRATIONS_APPLIED=$(psql "$DB_URL" -tAc "SELECT count(*) FROM schema_migrations" 2>/dev/null || echo 0)
echo "OK: all expected tables present. $MIGRATIONS_APPLIED migrations recorded in schema_migrations."