#!/usr/bin/with-contenv bashio
# ==============================================================================
# Home Assistant Community Add-on: S3 Backup
# ==============================================================================
#bashio::log.level "info"


# script global shortcuts
declare -r BACKUP_NAME="ha-backup-$(date +'%Y-%m-%d %H-%M')"
declare -r SSH_HOME="${HOME}/.ssh"

# call Home Assistant to create a local backup
# function fails in case local backup is not created
function create-local-backup {
    local -r base_folders="addons/local homeassistant media share ssl"
    local data="{\"name\":\"${BACKUP_NAME}\"}"
    local bak_type="non-encrypted"

    bashio::log.info "Creating ${bak_type} full backup: \"${BACKUP_NAME}\""

    if ! SLUG=$(bashio::api.supervisor POST /backups/new/full "${data}" .slug); then
        bashio::log.fatal "Error creating ${bak_type} full backup!"
        return "${__BASHIO_EXIT_NOK}"
    fi


    bashio::log.info "Backup created: ${SLUG}"
    return "${__BASHIO_EXIT_OK}"
}


bashio::log.info "Starting S3 Backup..."

create-local-backup || die "Local backup process failed! See log for details."

custom_endpoint="$(bashio::config 'custom_endpoint')"
bucket_name="$(bashio::config 'bucket_name')"
bucket_region="$(bashio::config 'bucket_region' 'minio')"
delete_local_backups="$(bashio::config 'delete_local_backups' 'true')"
local_backups_to_keep="$(bashio::config 'local_backups_to_keep' '3')"
monitor_path="/backup"
jq_filter=".backups|=sort_by(.date)|.backups|reverse|.[$local_backups_to_keep:]|.[].slug"

export AWS_ACCESS_KEY_ID="$(bashio::config 'aws_access_key')"
export AWS_SECRET_ACCESS_KEY="$(bashio::config 'aws_secret_access_key')"
export AWS_REGION="$bucket_region"

bashio::log.debug "Using AWS CLI version: '$(aws --version)'"
bashio::log.debug "Command: 'aws s3 sync $monitor_path s3://$bucket_name/ --no-progress --region $bucket_region'"
bashio::log.debug "SLUG: $SLUG"

aws s3 sync \
  $monitor_path \
  --endpoint-url $custom_endpoint \
  s3://$bucket_name/ \
  --no-progress \
  --region $bucket_region \

if bashio::var.true "${delete_local_backups}"; then
    bashio::log.info "Will delete all the oldest local backups except the '${local_backups_to_keep}' newest ones."
    backup_slugs="$(bashio::api.supervisor "GET" "/backups" "false" $jq_filter)"
    bashio::log.debug "Backups to delete: '$backup_slugs'"

    for s in $backup_slugs; do
        bashio::log.info "Deleting Backup: '$s'"
        bashio::api.supervisor "DELETE" "/backups/$s"
    done
else
    bashio::log.info "Will not delete any local backups since 'delete_local_backups' is set to 'false'"
fi

bashio::log.info "Finished S3 Backup."