#!/bin/bash -e
# This is Free Software under GNU Affero General Public License v >= 3.0
# without warranty, see README.md and license for details.
#
# SPDX-License-Identifier: AGPL-3.0-or-later
# License-Filename: LICENSES/AGPL-3.0.txt
#
# Copyright (C) 2019 by via donau
#   – Österreichische Wasserstraßen-Gesellschaft mbH
# Software engineering by Intevation GmbH
#
# Author(s):
#  * Sascha Wilde <wilde@intevation.de>

ME=`basename "$0"`
BASEDIR=`dirname "$0"`

usage()
{
  cat <<EOF
$ME [OPTION]...

Options:
  -d, --db=NAME    update the database NAME.  Default: "gemma"
  -p, --port=PORT  connect do the postgresql cluster at PORT.
                   Default is the postgresql standard port 5432
      --help       display this help and exit

EOF
}

fatal()
{
  echo >&2 "$1"
  exit 23
}

genpw()
# $1 - length
{
  PW=''
  until [ "$(grep '[^[:alnum:]]' <<<$PW)" -a "$(grep '[[:digit:]]' <<<$PW)" ]
  do
    PW=$(dd count=1 if=/dev/urandom 2>/dev/null \
           | tr -cd '[:alnum:],._!?-' | tail -c "$1")
  done
  echo "$PW"
}

# Defaults:

db=gemma
port=5432

# Parse options:

OPTS=`getopt \
      -l help,db:,port: \
      -o d:p: -n "$ME" -- "$@"`
[ $? -eq 0 ] || { usage ; exit 1 ; }

eval set -- "$OPTS"

while true ; do
  case "$1" in
    --db|-d)
      db="$2"
      shift 2
      ;;
    --port|-p)
      port="$2"
      shift 2
      ;;
    --help)
      { usage ; exit 0 ; }
      ;;
    --)
      shift
      break
      ;;
  esac
done


get_version()
{
  local ver
  if ver=$( psql -qtA -p "$port" -d "$db" \
                 -c 'SELECT get_schema_version()' 2>/dev/null )
  then
    echo ${ver:--1}
  else
    echo '-1'
  fi
}

# Main ------------------------------------------------------------

current_ver=$( get_version )

for d in "$BASEDIR"/updates/* ; do
  new_ver=$( basename $d )
  if [ -d "$d" ] && [ "$new_ver" -gt $current_ver ] ; then
    echo "Running updates for $new_ver ..."

    file_args=""
    for f in "$d"/* ; do
      file_args+=" -f $f"
    done

    psql -1qv ON_ERROR_STOP= -p "$port" -d "$db" $file_args \
      -c "INSERT INTO gemma_schema_version(version) VALUES ($new_ver)"

  fi
done