FROM buildpack-deps:jammy

ARG PG_VERSION=15

ADD postgresql.conf postgresql.conf
ADD pg_hba.conf pg_hba.conf
ADD 60-postgresql-shm.conf 60-postgresql-shm.conf
ADD create-postgres-database.sql create-postgres-database.sql
ADD create-postgres.sql create-postgres.sql

# prepare PostgreSQL APT repository
ARG DEBIAN_FRONTEND=noninteractive
RUN wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc > /etc/apt/keyrings/postgresql.asc
RUN echo "deb [ signed-by=/etc/apt/keyrings/postgresql.asc ] http://apt.postgresql.org/pub/repos/apt jammy-pgdg main" > \
      /etc/apt/sources.list.d/pgdg.list
RUN apt-get -yqq update && apt-get -yqq install apt-utils locales

RUN locale-gen en_US.UTF-8
ENV LANG=en_US.UTF-8
ENV LANGUAGE=en_US:en
ENV LC_ALL=en_US.UTF-8

# install postgresql on database machine
RUN apt-get -yqq install -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" postgresql-${PG_VERSION} postgresql-contrib-${PG_VERSION}

# Make sure all the configuration files in main belong to postgres
RUN sed -i "s|PG_VERSION|${PG_VERSION}|g" postgresql.conf
RUN mv postgresql.conf /etc/postgresql/${PG_VERSION}/main/postgresql.conf
RUN mv pg_hba.conf /etc/postgresql/${PG_VERSION}/main/pg_hba.conf

RUN chown -Rf postgres:postgres /etc/postgresql/${PG_VERSION}/main

RUN mkdir /ssd
RUN cp -R -p /var/lib/postgresql/${PG_VERSION}/main /ssd/postgresql
RUN cp /etc/postgresql/${PG_VERSION}/main/postgresql.conf /ssd/postgresql
RUN mv 60-postgresql-shm.conf /etc/sysctl.d/60-postgresql-shm.conf

RUN chown -Rf postgres:postgres /var/run/postgresql
RUN chmod 2777 /var/run/postgresql
RUN chown postgres:postgres /etc/sysctl.d/60-postgresql-shm.conf
RUN chown postgres:postgres create-postgres*
RUN chown -Rf postgres:postgres /ssd

ENV PGDATA=/ssd/postgresql

USER postgres

# We have to wait for postgres to start before we can use the cli
RUN service postgresql start && \
    until psql -c "\q"; do sleep 1; done && \
    psql < create-postgres-database.sql && \
    psql -a hello_world < create-postgres.sql && \
    service postgresql stop

ENV PATH=${PATH}:/usr/lib/postgresql/${PG_VERSION}/bin

CMD ["postgres"]