ARG BASETAG=alpine
FROM postgres:$BASETAG

ARG GOCRONVER=v0.0.10
ARG TARGETOS
ARG TARGETARCH
RUN set -x \
	&& apk update && apk add ca-certificates curl \
	&& curl -L https://github.com/prodrigestivill/go-cron/releases/download/$GOCRONVER/go-cron-$TARGETOS-$TARGETARCH-static.gz | zcat > /usr/local/bin/go-cron \
	&& chmod a+x /usr/local/bin/go-cron

ENV POSTGRES_DB="**None**" \
    POSTGRES_DB_FILE="**None**" \
    POSTGRES_HOST="**None**" \
    POSTGRES_PORT=5432 \
    POSTGRES_USER="**None**" \
    POSTGRES_USER_FILE="**None**" \
    POSTGRES_PASSWORD="**None**" \
    POSTGRES_PASSWORD_FILE="**None**" \
    POSTGRES_PASSFILE_STORE="**None**" \
    POSTGRES_EXTRA_OPTS="-Z6" \
    POSTGRES_CLUSTER="FALSE" \
    BACKUP_SCHEDULE="@daily" \
    CLEANUP_SCHEDULE="0 0 1 * * *" \
    BACKUP_DIR="/backups" \
    BACKUP_SUFFIX=".sql.gz" \
    BACKUP_KEEP_DAYS="7" \
    BACKUP_DELETE_DAYS=true \
    BACKUP_KEEP_WEEKS="4" \
    BACKUP_DELETE_WEEKS=true \
    BACKUP_KEEP_MONTHS="6" \
    BACKUP_DELETE_MONTHS=true \
    BACKUP_MONTH_DAY="01" \
    BACKUP_WEEK_DAY="Sunday" \
    HEALTHCHECK_PORT=8080

COPY backup.sh /backup.sh

VOLUME /backups

ENTRYPOINT ["/bin/sh", "-c"]
CMD ["exec /usr/local/bin/go-cron -s \"$BACKUP_SCHEDULE\" -p \"$HEALTHCHECK_PORT\" -- /backup.sh -b"]
CMD ["exec /usr/local/bin/go-cron -s \"$CLEANUP_SCHEDULE\" -p \"$HEALTHCHECK_PORT\" -- /backup.sh -c"]

HEALTHCHECK --interval=5m --timeout=3s \
  CMD curl -f "http://localhost:$HEALTHCHECK_PORT/" || exit 1