#!/bin/bash

hostname="$(hostname)"

/etc/init.d/mysql start || true
. /etc/mysql/sipwise.cnf

if ! mysql -usipwise -p${SIPWISE_DB_PASSWORD} -e 'use ngcp;' 2>/dev/null ; then
  mysql -usipwise -p${SIPWISE_DB_PASSWORD} < /usr/share/ngcp-db-schema/db_scripts/init/0005_create_ngcp.up
fi

if ! mysql -usipwise -p${SIPWISE_DB_PASSWORD} -e 'use ngcp;' 2>/dev/null ; then
  echo 'Error: ngcp database does not exist.' >&2
  exit 1
fi

if ! mysql -usipwise -p${SIPWISE_DB_PASSWORD} ngcp -e 'describe db_schema'  >/dev/null; then
  echo 'Error: db_schema table does not exit.' >&2
  exit 1
fi

if [ -x /usr/sbin/ngcp-check_active ] ; then
  if /usr/sbin/ngcp-check_active -q ; then
    echo "This seems to be the active node, registering revisions."
  else
    # TODO - is this really true? what about /usr/share/ngcp-upgrade-2.4/db/5670.up?
    echo "This does not seem to be the active node, nothing to do."
    exit 0
  fi
fi

revision_wrapper() {
  [ -n "$1" ] || return 1

  for rev in $* ; do
    revname="$(basename $rev)"

    if ngcp-check-rev-applied --schema db_schema --revision "$revname" ; then
      echo "Revision $revname has been applied already, nothing to do."
      continue
    fi
  
    printf "Applying revision script %s: " "$rev"
    if mysql -usipwise -p${SIPWISE_DB_PASSWORD} < "$rev" ; then
      echo done
    else
      echo "failed. :("
      exit 1
    fi

    if mysql -usipwise -p${SIPWISE_DB_PASSWORD} ngcp -e "insert into db_schema values (0, '${revname}', \""${hostname}"\", CURRENT_TIMESTAMP);" ; then
      echo "Marked revision $rev for being applied."
    else
      echo "Error while executing DB commands using revision $rev for host $hostname" >&2
      exit 1
    fi
  done
}

revision_wrapper /usr/share/ngcp-db-schema/db_scripts/base/*.up
revision_wrapper /usr/share/ngcp-db-schema/db_scripts/diff/*.up
# TODO language_wrapper

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