#!/bin/bash
#
# ROOT=/nas/data/Development/Raspberry/gpiocrtl/test-install
#


BUILD="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

SERVICE="sprinklerd"

BIN="sprinklerd"
CFG="sprinklerd.conf"
SRV="sprinklerd.service"
DEF="sprinklerd"
MDNS="sprinklerd.service"

BINLocation="/usr/local/bin"
CFGLocation="/etc"
SRVLocation="/etc/systemd/system"
DEFLocation="/etc/default"
WEBLocation="/var/www/sprinklerd/"
MDNSLocation="/etc/avahi/services/"

if [[ $EUID -ne 0 ]]; then
   echo "This script must be run as root" 
   exit 1
fi

if [[ $(mount | grep " / " | grep "(ro,") ]]; then
  echo "Root filesystem is readonly, can't install" 
  exit 1
fi

if [ "$1" == "uninstall" ] || [ "$1" == "-u" ] || [ "$1" == "remove" ]; then
  systemctl stop $SERVICE > /dev/null 2>&1
  systemctl disable $SERVICE  > /dev/null 2>&1
  rm -f $BINLocation/$BIN
  rm -f $SRVLocation/$SRV
  rm -f $DEFLocation/$DEF
  rm -f $MDNSLocation/$MDNS
  rm -rf $WEBLocation
  if [ -f $CFGLocation/$CFG ]; then
    cache=$(cat $CFGLocation/$CFG | grep CACHE | cut -d= -f2 | sed -e 's/^[ \t]*//' | sed -e 's/ *$//')
    rm -f $cache
    rm -f $CFGLocation/$CFG 
  fi
  rm -f "/etc/cron.d/sprinklerd"
  echo "SprinklerD & configuration removed from system"
  exit
fi

# Check cron.d options
if [ ! -d "/etc/cron.d" ]; then
  echo "The version of Cron may not support chron.d, if so the calendar will not work"
  echo "Please check before starting"
else
  if [ -f "/etc/default/cron" ]; then
    CD=$(cat /etc/default/cron | grep -v ^# | grep "\-l")
    if [ -z "$CD" ]; then
      echo "Please enabled cron.d support, if not the calendar will not work"
      echo "Edit /etc/default/cron and look for the -l option"
    fi
  else
    echo "Please make sure the version if Cron supports chron.d, if not the calendar will not work"
  fi
fi

# Exit if we can't find systemctl
command -v systemctl >/dev/null 2>&1 || { echo "This script needs systemd's systemctl manager, Please check path or install manually" >&2; exit 1; }

# stop service, hide any error, as the service may not be installed yet
systemctl stop $SERVICE > /dev/null 2>&1
SERVICE_EXISTS=$(echo $?)

# copy files to locations, but only copy cfg if it doesn;t already exist

cp $BUILD/$BIN $BINLocation/$BIN
cp $BUILD/$SRV $SRVLocation/$SRV

if [ -f $CFGLocation/$CFG ]; then
  echo "Config exists, did not copy new config, you may need to edit existing! $CFGLocation/$CFG"
else
  cp $BUILD/$CFG $CFGLocation/$CFG
fi

if [ -f $DEFLocation/$DEF ]; then
  echo "Defaults exists, did not copy new defaults to $DEFLocation/$DEF"
else
  cp $BUILD/$DEF.defaults $DEFLocation/$DEF
fi

if [ -f $MDNSLocation/$MDNS ]; then
  echo "Avahi/mDNS defaults exists, did not copy new defaults to $MDNSLocation/$MDNS"
else
  if [ -d "$MDNSLocation" ]; then
    cp $BUILD/$MDNS.avahi $MDNSLocation/$MDNS
  else
    echo "Avahi/mDNS may not be installed, not copying $MDNSLocation/$MDNS"
  fi
fi

if [ ! -d "$WEBLocation" ]; then
  mkdir -p $WEBLocation
fi

cp -r $BUILD/../web/* $WEBLocation

systemctl enable $SERVICE
systemctl daemon-reload

if [ $SERVICE_EXISTS -eq 0 ]; then
  echo "Starting daemon $SERVICE"
  systemctl start $SERVICE
fi