#!/usr/bin/env bash

# execute script in its location folder
cd $(dirname $0)

deleteOldest() {
  line_num=0
  while IFS=  read -r -d $'\0'; do
      if [ $line_num == 1 ]; then
        $(rm -rf ${REPLY})
      fi
      ((line_num++))
  done < <(find -maxdepth 1 -type d -print0 | sort -z)
}

# array of available collection names
col=(app_user awarding decoration rank squad user promotion player war campaign)

if [ -z "$1" ]
  then
    DATE=$(date '+%Y-%m-%d')
    mkdir -p ${DATE}/resource
    cp -R ../api/resource/ ${DATE}/resource
  else
    DATE=${1}
    tar -xzf ${DATE}.tar.gz
    rm -rf ../api/resource
    cp -Rv ${DATE}/resource ../api/

fi

for i in "${col[@]}"
do
  # provide date for restore process, if data import is needed
  if [ -z "$1" ]
    then
      mongoexport --db cc --collection $i --out ${DATE}/collections/${i}.json;
      if [ $(ls -l | grep -c ^d) -gt 5 ]; then
        deleteOldest
      fi
    else
      mongoimport --db cc --collection $i --drop --file ${1}/collections/${i}.json
  fi
done

if [ -z "$1" ]
  then
    tar -zcf ${DATE}.tar.gz ${DATE}
fi

rm -rf ${DATE}