#!/bin/bash

set -euo pipefail

scriptpath="$( cd -- "$(dirname "$0")" >/dev/null 2>&1 ; pwd -P )"

dumpfile="dump.sql"

tmpdir="$(mktemp -d -p "${PWD}")"

function check_for_hash() {
    local ret=0
    echo -n "Checking if hash ${1} is present: "
    aws s3 ls "s3://${S3_BUCKET}/sums/${1}" || ret=$?
		case "$ret" in
				0) echo "Yes." ;;
				*) echo "No." ;;
		esac
    return $ret
}

function create_and_upload() {
    local sum=$1
    local backup_file
    backup_file="$(date +%Y/%m/${DATABASE_URL}_backup-%d-%H-%M-%S.tar.gz)"
		echo "Uploading ${backup_file}"
    tar -zc . | aws s3 cp - "s3://${S3_BUCKET}/${backup_file}"
    aws s3api put-object --bucket "${S3_BUCKET}" --key "sums/${sum}"
}

chmod ugo+wX "${tmpdir}"

pushd "${tmpdir}"

rm -rf "${dumpfile}"
touch "${dumpfile}"
chmod ugo+w "${dumpfile}"
sudo -u postgres -- pg_dump --no-owner --no-privileges --clean --if-exists --quote-all-identifiers "bitwarden_${DATABASE_URL}" -f "${dumpfile}"

"${scriptpath}/pgdump-sort" "${dumpfile}" "sorted.sql"

cp -r "${ROOT_DIR}/data/${DATABASE_URL}" "./data"
cp "${ETC_DIR}/${DATABASE_URL}.conf" "./.env"
cp "${ROOT_DIR}/${DATABASE_URL}.conf" "./${DATABASE_URL}.conf"

rm -rf ./data/icon_cache

sum=$(find . -type f -not -name "${dumpfile}" -exec md5sum {} + | LC_ALL=C sort | md5sum | cut -d ' ' -f 1)

rm sorted.sql

check_for_hash "$sum" || create_and_upload "${sum}"

popd
rm -rf "${tmpdir}"