#!/usr/bin/env bash
set -euo pipefail

repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/../../.." && pwd)"
case "${repo_root}" in
  /mnt/*|/media/*)
    echo "FAIL: run this test from a WSL-native copy, not a mounted Windows path." >&2
    exit 2
    ;;
esac

cd "${repo_root}"

for command in mysql mysqladmin node npm openssl; do
  command -v "${command}" >/dev/null || {
    echo "FAIL: required command is missing: ${command}" >&2
    exit 2
  }
done

mysqladmin ping --silent >/dev/null || {
  echo "FAIL: local MySQL is not responding." >&2
  exit 2
}

mysql_version="$(mysql --batch --skip-column-names -e 'SELECT VERSION()')"
mysql_major="${mysql_version%%.*}"
if [[ "${mysql_major}" != "8" ]]; then
  echo "FAIL: MySQL 8 is required; actual version is ${mysql_version}." >&2
  exit 2
fi

mysql --batch --skip-column-names -e 'SELECT CURRENT_USER()' >/dev/null

run_id="$(date -u +%Y%m%d%H%M%S)_$$_$(openssl rand -hex 3)"
database="qipai_m01c_test_${run_id}"
username="qmb_$$_$(openssl rand -hex 4)"
password="$(openssl rand -hex 24)"
created=0

cleanup() {
  if [[ "${created}" == "1" ]]; then
    mysql --batch --skip-column-names <<SQL >/dev/null
DROP DATABASE IF EXISTS \`${database}\`;
DROP USER IF EXISTS '${username}'@'127.0.0.1';
SQL
  fi
}
trap cleanup EXIT INT TERM

create_temporary_resources() {
  created=1
  mysql --batch --skip-column-names <<SQL >/dev/null
CREATE DATABASE \`${database}\` CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
CREATE USER '${username}'@'127.0.0.1' IDENTIFIED BY '${password}';
GRANT ALL PRIVILEGES ON \`${database}\`.* TO '${username}'@'127.0.0.1';
SQL
}

if [[ "${1:-}" == "--force-failure" ]]; then
  create_temporary_resources
  exit 23
fi

if [[ "${1:-}" == "--cleanup-probe" ]]; then
  before_database_count="$(mysql --batch --skip-column-names -e "SELECT COUNT(*) FROM information_schema.SCHEMATA WHERE SCHEMA_NAME LIKE 'qipai_m01c_test_%'")"
  before_user_count="$(mysql --batch --skip-column-names -e "SELECT COUNT(*) FROM mysql.user WHERE User LIKE 'qmb_%' AND Host = '127.0.0.1'")"
  set +e
  bash "${BASH_SOURCE[0]}" --force-failure
  probe_status=$?
  set -e
  [[ "${probe_status}" == "23" ]] || {
    echo "FAIL: cleanup probe did not produce the expected interrupted status." >&2
    exit 1
  }
  after_database_count="$(mysql --batch --skip-column-names -e "SELECT COUNT(*) FROM information_schema.SCHEMATA WHERE SCHEMA_NAME LIKE 'qipai_m01c_test_%'")"
  after_user_count="$(mysql --batch --skip-column-names -e "SELECT COUNT(*) FROM mysql.user WHERE User LIKE 'qmb_%' AND Host = '127.0.0.1'")"
  if [[ "${before_database_count}" != "${after_database_count}" || "${before_user_count}" != "${after_user_count}" ]]; then
    echo "FAIL: temporary MySQL resources survived an interrupted test." >&2
    exit 1
  fi
  echo "PASS: interrupted-run cleanup removed the temporary database and account."
  exit 0
fi

create_temporary_resources

export NODE_ENV=test
export QIPAI_MYSQL_HOST=127.0.0.1
export QIPAI_MYSQL_PORT=3306
export QIPAI_MYSQL_DATABASE="${database}"
export QIPAI_MYSQL_USER="${username}"
export QIPAI_MYSQL_PASSWORD="${password}"
export QIPAI_MYSQL_CONNECTION_LIMIT=2

echo "INFO: MySQL ${mysql_version}; running M01-B through M03-D migration roundtrip in a temporary database."
npm --prefix backend run test:mysql:migration
echo "PASS: M01-B through M03-D live MySQL migration roundtrip completed."