#!/bin/bash
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
# shellcheck source=./mysql_common.sh
source "$SCRIPT_DIR/mysql_common.sh"

fail() {
  echo "alt-mysql health: $*" >&2
  exit 1
}

mysql_load_alt_runtime
mysql_load_alt_credentials

if command -v systemctl >/dev/null 2>&1; then
  systemctl is-active --quiet "$MYSQL_ALT_SERVICE_NAME" || fail "service is not active: $MYSQL_ALT_SERVICE_NAME"
fi

[ -r "$MYSQL_ALT_MY_CNF" ] || fail "client defaults file is not readable: $MYSQL_ALT_MY_CNF"
[ -r "$MYSQL_ALT_MYSQL_CONF" ] || fail "credentials file is not readable: $MYSQL_ALT_MYSQL_CONF"
[ -n "$MYSQL_ALT_PORT" ] || fail "alt port was not discovered"
[ -n "$MYSQL_ALT_SOCKET" ] || fail "alt socket was not discovered"

"$(mysql_alt_binary mysql)" --defaults-extra-file="$MYSQL_ALT_MY_CNF" -e "SELECT 1" >/dev/null \
  || fail "cannot connect through $MYSQL_ALT_MY_CNF"

mysql_ensure_metadata_schema
mysql_exec mysql -e "SELECT COUNT(*) FROM da_plugin_database_owners" >/dev/null \
  || fail "metadata schema is not usable"

echo "alt-mysql health: OK"