#!/bin/bash

# Use setcap'd binary in home directory
#PATH="/home/restic/bin/:$PATH"
# Now uses binary in /usr/bin, which is also setcap'd

backup_origin="/backups/restic"
backup_container="central-backup"

if [[ -z "$1" || "$1" != "daily" && "$1" != "weekly" && "$1" != "monthly" ]]; then
	echo "Usage : backup [daily|weekly|monthly]"
	exit 1
fi

include_files=""

# Use case fallthrough to include each subset of files
# Set the number of backups to keep at the same time using default values
case "$1" in
	"monthly")
		include_files="$include_files"" --files-from targets/monthly"
		backup_count=${backup_count:-6}
		;&
	"weekly")
		include_files="$include_files"" --files-from targets/weekly"
		backup_count=${backup_count:-8}
		;&
	"daily")
		include_files="$include_files"" --files-from targets/daily"
		backup_count=${backup_count:-14}
		;;
esac

cd "$backup_origin"

# Run database backups

echo "Backing up BookStack db..."
mysqldump -u restic BookStack > temp/BookStack_db.mysql
echo "Backing up BitWarden db..."
sqlite3 /home/bitwarden/data/db.sqlite3 ".backup $backup_origin/temp/BitWarden_db.sqlite"
echo "Backing up Firefly db..."
sqlite3 /var/www/firefly-iii/storage/database/database.sqlite ".backup $backup_origin/temp/Firefly_db.sqlite"

# Backup apt package list and keys
(
cd temp

echo "Backing up apt keys,sources and packages..."
../package_save.sh here
)

# Use OVH credentials and backup

source openstack_creds.sh

export RESTIC_PASSWORD_FILE="$backup_container".pass
export RESTIC_REPOSITORY="swift:$backup_container:/restic"

restic backup $include_files --verbose --tag "$1" > backup_output.log 2>&1
if [ $? -ne 0 ]; then
	error_message="Restic backup failed ! See log bellow.\n"
	error_message="$error_message""Backup check and purge will not be run.\n\n"
	error_message="$error_message""$(cat backup_output.log)"
fi

if [ -z "$error_message" ]; then
	restic check --verbose > check_output.log 2>&1
fi
if [ $? -ne 0 ]; then
	error_message="Restic check failed ! See log below.\n"
	error_message="$error_message""Backup purge will not be run.\n\n"
	error_message="$error_message""$(cat check_output.log)"
fi

# Clean up and remove old backups
rm -rf temp/*

if [ -z "$error_message" ]; then
	restic forget --verbose --prune --group-by tag --tag "$1" --keep-last "$backup_count" > forget_output.log 2>&1
fi
if [ $? -ne 0 ]; then
	error_message="Restic forget failed ! See log bellow.\n\n"
	error_message="$error_message""$(cat forget_output.log)"
fi


if [ -n "$error_message" ]; then
	echo -e "$error_message" | mail -aFrom:"$mail_sender" -s "[$(uname -n)] ⚠️ Backup error $(date +%D-%Hh%M)" "$mail_recipients"
	exit 1
fi

exit 0