#!/bin/bash
# Executes a database backup for the specified database container.
# The current directory is expected to contain a project configured
# as with SSDT conventions for an application database.
#
# When successful, the output file will be in ./backup with the
# container name and timestamp in the file.
# The file will also be placed on the specified remote target
# The format of the output is a compressed pg_dump (sql) format.
#
#
# This will backup both usasdb and uspsdb,
# along with the top level contents of the project directory
#Environment variables can be used for REMOTE_BACKUP_TARGET and REMOTE_USERNAME

remoteTarget=${1:-$REMOTE_BACKUP_TARGET}
userName=${2:-$REMOTE_USERNAME}
projectDir=${3:-$PWD}


cd $projectDir

source "${SSDT_SCRIPTS:-$(dirname "${BASH_SOURCE[0]}")}/.functions.sh"

set -o pipefail
mkdir -p ./backup

container1=usasdb
container2=uspsdb

project=$(composeGetProject)

echo "project is $project"
echo "Containers are $container1 and $container2"
echo "Remote target is $remoteTarget"
echo "Username is $userName"

if [ "$project" == "" ]; then
   echo "no project available"
   exit 1
fi


backupFile1=./backup/${project}-${container1}.$(date +%Y-%m-%d-%H-%M-%S).backup
backupFile2=./backup/${project}-${container2}.$(date +%Y-%m-%d-%H-%M-%S).backup
backupFile3=./backup/${project}-directory.$(date +%Y-%m-%d-%H-%M-%S).directorycontents.tar.gz

#usasdb
echo "starting backup of $container1 for $project"
docker-compose exec -T $container1 sh -c "gosu postgres pg_dump -Cc --if-exists --dbname=$container1 ; (exit $?) " > ${backupFile1}

  if [[ $( grep --count "CREATE TABLE" ${backupFile1} ) -lt 200 || $( grep --count "PostgreSQL database dump complete" ${backupFile1} ) -eq 0 ]]; then
     echo "ERROR: backup verification FAILED"
     echo "ERROR:  $(tail ${backupFile1})"
     else
     gzip ${backupFile1}

     echo "completed backup of $container1 for $project to ${backupFile1}"

  fi


#####
#uspsdb is being used

echo "starting backup of $container2 for $project"
docker-compose exec -T $container2 sh -c "gosu postgres pg_dump -Cc --if-exists --dbname=$container2 ; (exit $?) " > ${backupFile2}

  if [[ $( grep --count "CREATE TABLE" ${backupFile2} ) -lt 200 || $( grep --count "PostgreSQL database dump complete" ${backupFile2} ) -eq 0 ]]; then
     echo "ERROR: backup verification FAILED"
     echo "ERROR:  $(tail ${backupFile2})"
     else
     gzip ${backupFile2}

     echo "completed backup of $container2 for $project to ${backupFile2}"

  fi

#######

#backup of all files in current directory
echo "starting backup of current directory for $project"

tar -czf ${backupFile3} . --exclude=./backup

echo "completed backup of all files for $project to ${backupFile3}"


#
#
scp ${backupFile1}.gz  ${backupFile2}.gz ${backupFile3} $userName@$remoteTarget

echo " "

echo "completed sending ${backupFile1}.gz, ${backupFile2}.gz, and ${backupFile3} to ${remoteTarget} as user $userName"