#!/bin/bash

toolName=postfixadmin
toolPhpDeps='php${PFA_PHP_VERSION:-}-fpm php${PFA_PHP_VERSION:-}-imap php${PFA_PHP_VERSION:-}-mbstring php${PFA_PHP_VERSION:-}-mysql php${PFA_PHP_VERSION:-}-json php${PFA_PHP_VERSION:-}-curl php${PFA_PHP_VERSION:-}-zip php${PFA_PHP_VERSION:-}-xml php${PFA_PHP_VERSION:-}-bz2 php${PFA_PHP_VERSION:-}-intl php${PFA_PHP_VERSION:-}-gmp'
toolConfName="config.local.php"
toolTemplates="templates_c"
toolTemplatesLoc=
toolAdditionsLoc=
latestUrl="https://api.github.com/repos/$toolName/$toolName/releases/latest"
fetchmailUser="fetchmail"
fetchmailDeps="fetchmail liblockfile-simple-perl"

# Get script working directory
# (when called from a different directory)
WDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >>/dev/null 2>&1 && pwd )"
CONFIG=0
CONFIG_FILE_NAME="${toolName}.cfg"
CONFIG_FILE_TEMPLATE="$WDIR/${CONFIG_FILE_NAME}.example"

seq_config() {
  if initSeqConfig "$CONFIG_FILE_NAME" "$CONFIG_FILE_TEMPLATE" ; then
    info    "${toolName} path:   ${PFA_WEB_LOC:-}"
    info -a "${toolName} backup: ${PFA_BACKUP:-}"
    info -a "            php Version: ${PFA_PHP_VERSION:-}"
    CONFIG=1
    toolTemplatesLoc="$PFA_SRV_LOC/$toolTemplates"
    toolAdditionsLoc="$PFA_SRV_LOC/ADDITIONS"
  else
    dry || return 1
  fi
}

step_1_info() { 
  # eval needed to expand sourced configuration variables
  local localDeps=`eval "echo \"$toolPhpDeps\""`
  echo "Install $toolName dependencies:"
  echoinfo "$localDeps"
}
step_1_alias() { echo "install"; }
step_1() {
  # eval needed to expand sourced configuration variables
  local localDeps=`eval "echo \"$toolPhpDeps\""`
  local aptOpt=
  if quiet;then
    aptOpt="-y"
  fi
  exe apt update
  exe apt install $localDeps $aptOpt
}

step_2_info() { echo "Install $toolName to ${PFA_SRV_LOC:-}"; }
step_2() {
  step upgrade
}

step_3_info() { echo "Install fetchmail"; }
step_3_alias() { echo "install_fetchmail"; }
step_3() {
  local aptOpt=
  if quiet;then
    aptOpt="-y"
  fi
  exe apt install $fetchmailDeps $aptOpt
  endReturn -o $? "Failed to install fetchmail"
  exe systemctl stop fetchmail
  exe systemctl disable fetchmail
}

step_4_info() { echo "Configure postfixadmin to use fetchmail"; }
step_4() {
  echo "# Create mysql config"
  echo "  [$PFA_SRV_LOC/fetchmail.conf]"
  echo "   # Follow instructions in $toolAdditionsLoc/fetchmail.pl"
  echo "   \$db_type = 'mysql';"
  echo "   \$run_dir=\"/var/lock\";"
  echo
  echo "  [$toolAdditionsLoc/fetchmail.pl]"
  echo "   # Change path to fetchmail.conf (see above)"
  echo
  echo " [I] Run step \"timer\" when configuration is done"
}

step_6_info() {
  echo "Create postfixadmin fetchmail systemd timer and reduce syslog entries"
  echoinfo "Needs to start after the mysql service"
}
step_6_alias() { echo "timer"; }
step_6() {
  # eval needed to expand sourced configuration variables
  local localService=`eval "echo \"$fetchPluginService\""`

  addConf -s "$localService" "$fetchPluginServiceLoc"
  addConf -s "$fetchPluginTimer" "$fetchPluginTimerLoc"
  exe systemctl enable --now ${fetchPluginServiceName}.timer

  addConf -s "$fetchPluginRsyslog" "$fetchPluginRsyslogLoc"
  exe service rsyslog restart
}
fetchPluginServiceName="pfafetchmail"
fetchPluginServiceLoc="/etc/systemd/system/${fetchPluginServiceName}.service"
fetchPluginService="[Unit]
Description=Postfix fetchmail plugin
After=mysql.service

[Service]
# emerg (lowest log level, only highest priority messages),
# alert, crit, err, warning, notice, info, debug
LogLevelMax=notice
User=$fetchmailUser
ExecStart=\${PFA_SRV_LOC}/ADDITIONS/fetchmail.pl >>/dev/null

[Install]
WantedBy=multi-user.target"
fetchPluginTimerLoc="/etc/systemd/system/${fetchPluginServiceName}.timer"
fetchPluginTimer="[Unit]
Description=Postfix fetchmail plugin execute every minute

[Timer]
OnCalendar=minutely
Persistent=true

[Install]
WantedBy=basic.target"
fetchPluginRsyslogLoc="/etc/rsyslog.d/31-fetchmailreduce.conf"
fetchPluginRsyslog="if \$programname == 'systemd' and re_match(\$msg, \"Started.*fetchmail\") then stop
if \$programname == 'systemd' and re_match(\$msg, \"fetchmail.*Succeeded\") then stop"

step_7_info() { echo "Create separate log file for fetchmail using rsyslog"; }
step_7_alias() { echo "newlog"; }
step_7() {
  addConf -f "$fetchmailRsyslog" "$fetchmailRsyslogLoc"
  addConf -f "$fetchmailRotate" "$fetchmailRotateLoc"
  exe service rsyslog restart
}
fetchmailLogLoc="/var/log/fetchmail.log"
fetchmailRotateLoc="/etc/logrotate.d/fetchmail"
fetchmailRotate="$fetchmailLogLoc {
  rotate 14
  weekly
  missingok
  daily
  compress
  delaycompress
}"
fetchmailRsyslogLoc="/etc/rsyslog.d/30-fetchmail.conf"
fetchmailRsyslog="if \$programname == 'fetchmail' or \$programname == 'fetchmail-all' then $fetchmailLogLoc
& stop"

step_18_info() { echoinfoArgs "[NEW VERSION]"; echo "Check for updates"; }
step_18_alias() { echo "updatecheck"; }
step_18() {
  shift
  local isInstalled=
  local latestVersion=
  if [ -n "${1:-}" ] ; then
    latestVersion="$1"
  else
    latestVersion=$(curl --silent "$latestUrl" | grep -Po '"tag_name": "postfixadmin-\K.*?(?=")')
  fi

  isInstalled=$(grep -E "${latestVersion}" "${PFA_WEB_LOC}/version" >>/dev/null 2>&1 && echo "1" || echo "0")
  if [ $isInstalled -eq 1 ] ; then
    echo " [I] Version $latestVersion is already installed"
    return 1
  else
    echo " [I] Update to $latestVersion available"
  fi
  return 0
}


step_20_info() { 
  echoinfoArgs "[POSTFIXADMIN SRV ROOT]"
  echo -n "Create a backup"
  if [ $CONFIG -ne 0 ] ; then
    echo " at $PFA_BACKUP"
  else
    echo
  fi
}
step_20_alias() { echo "backup"; }
step_20() {
  shift
  local tempRoot=
  if [ $CONFIG -eq 0 ] ; then
    error -e "No configuration file found"
    return 1
  fi
  if [ ! -z $PFA_BACKUP ] ; then
    exe mkdir -p "$PFA_BACKUP"
  fi
  if [ -n "${1:-}" ] ; then
    tempRoot="$1"
  else
    tempRoot="$PFA_SRV_LOC"
  fi

  local srvBackup="$PFA_BACKUP/${toolName}_`date +%Y%m%d-%H%M%S`.tar.gz"
  echo " [I] Backing up server directory to $srvBackup"
  exe cd "$tempRoot/.."
  exe tar czf "$srvBackup" $(basename "$tempRoot")

  exe $WDIR/mysql.sh -qq backup "$PFA_DATABASE" "$PFA_BACKUP"
}

step_22_info() {
  echoinfoArgs "[CUSTOM VERSION]"
  shift
  if contextExe; then
    echoinfo -n "Upgrade to version "
    if [ -z "${1:-}" ]; then
      echo -n "$(curl --silent "$latestUrl" | grep -Po '"tag_name": "postfixadmin-\K.*?(?=")')"
    else
      echo -n "$1"
    fi
    echo " from github"
  else
    echo "Upgrade to latest or a custom version from github"
  fi
}
step_22_alias() { echo "upgrade"; }
step_22() {
  shift # don't need step number
  local latestVersion=
  if [ -n "${1:-}" ] ; then
    latestVersion="$1"
  else
    latestVersion=$(curl --silent "$latestUrl" | grep -Po '"tag_name": "postfixadmin-\K.*?(?=")')
  fi

  if [ -z $latestVersion ] ; then
    error -e "Cannot determine latest version from github repository"
    return 1
  elif interactive ; then
    echo
    exe read -p "Install $latestVersion to $PFA_SRV_LOC [n]o/(y)es? " answer
    case $answer in
      [yY])
        ;;
      *)
        info -e "Upgrade aborted"
        return 1
        ;;
    esac
  fi

  # Major versions are stated in the CHANGELOG.TXT without the trailing minor version e.g. "3.3" for "3.3.0"
  # Trailing ".0" is removed if exists
  local isInstalled=$(grep -E "Version ${latestVersion%.0} " "${PFA_SRV_LOC}/CHANGELOG.TXT" >>/dev/null 2>&1 && echo "1" || echo "0")
  if [ $isInstalled -eq 1 ] ; then
    error -e "Version $latestVersion is already installed"
    return 2
  fi

  # Download
  local downUrl="https://github.com/$toolName/$toolName/archive/postfixadmin-${latestVersion}.tar.gz"
  local tempExtract="$tempDown/postfixadmin-postfixadmin-$latestVersion"

  if [ ! -e "$tempExtract" ] ; then
    exe mkdir -p "$tempDown"
    exe wget -O "$tempLoc" $downUrl
    endReturn -o $? "Download failed: $downUrl"
    exe cd "$tempDown"
    exe tar -xf "$tempLoc"
    endReturn -o $? "Extract failed: $tempLoc"
  else
    echo " [I] Found existing download: $tempExtract"
  fi

  # Installation
  local tempBu="${PFA_SRV_LOC}_bu_`date +%Y%m%d-%H%M%S`"

  if [ -e "$PFA_SRV_LOC" ] ; then
    exe mv "$PFA_SRV_LOC" "$tempBu"
    step backup "$tempBu"
    endReturn -o $? "Backup failed; $PFA_SRV_LOC renamed!"
  fi
  echo " [I] Installing version $latestVersion to $PFA_SRV_LOC"
  exe cp -ar "$tempExtract" "$PFA_SRV_LOC"
  exe mkdir -p $(dirname "$PFA_WEB_LOC")
  echo " [I] Create symlink to $PFA_WEB_LOC"
  exe ln -fs "$PFA_SRV_LOC/public" "$PFA_WEB_LOC"

  # Setting file permissions
  exe chown -R www-data: "$PFA_SRV_LOC/public"

  # Configuration
  local webConf="$tempBu/$toolConfName"
  if [ -e "$webConf" ] ; then
    echo " [I] Copying configuration"
    exe cp -ar "$webConf" "$PFA_SRV_LOC/"
  else
    echo " [I] Creating empty configuration file $PFA_SRV_LOC/$toolConfName"
    exep "echo -e \"# Created gy $WDIR/$(basename $0)\\n\\n# Changeme\" > \"$PFA_SRV_LOC/$toolConfName\""
  fi

  # Templates
  local templatesLoc="$tempBu/$toolTemplates"
  if [ -e "$templatesLoc" ] ; then
    echo " [I] Copying $toolTemplates"
    exe cp -ar "$templatesLoc" "$toolTemplatesLoc"
  else
    echo " [I] Creating empty directory $toolTemplatesLoc"
    exe mkdir -p "$toolTemplatesLoc"
    exe chown -R www-data: "$toolTemplatesLoc"
  fi

  exe rm -rf "$tempBu"
}
tempDown="/tmp/${toolName}"
tempLoc="$tempDown/${toolName}.tar.gz"

step_23_info() { echo "Clean temporary files: $tempDown"; }
step_23_alias() { echo "clean"; }
step_23() {
  exe rm -rf "$tempDown"
}

step_100_info() { 
  echoinfoArgs "[OPTIONS]"
  echo "Execute $toolName client script"
  echoinfo "[OPTIONS] are passed on to $toolName-cli unmodified"
}
step_100_alias() { echo "cli"; }
step_100() {
  shift
  exe ${PFA_SRV_LOC}/scripts/$toolName-cli $@
}

readonly sqr_minVersion=16
. /usr/local/bin/sequencer.sh