#!/bin/bash
set -e

DATA_DIR="/var/lib/postgresql/data"

if [ ! -f "$DATA_DIR/PG_VERSION" ]; then
  echo "Running pg_basebackup from primary..."

  rm -rf "$DATA_DIR"/*
  export PGPASSWORD="$REPLICATION_PASSWORD"

  pg_basebackup \
    -h "$PRIMARY_HOST" \
    -p "$PRIMARY_PORT" \
    -U "$REPLICATION_USER" \
    -D "$DATA_DIR" \
    -Fp \
    -Xs \
    -R \
    -P

  echo "Fixing ownership and permissions..."
  chown -R postgres:postgres "$DATA_DIR"
  chmod 0700 "$DATA_DIR"
else
  echo "Replica already initialized"
fi

echo "Starting postgres as postgres user..."

exec gosu postgres postgres \
  -c config_file=/etc/postgresql/postgresql.conf \
  -c hba_file=/etc/postgresql/pg_hba.conf