#!/usr/bin/env bash
# {{ ansible_managed }}
# Daily PostgreSQL backup script

set -euo pipefail

BACKUP_DIR="{{ pg_backup_dir }}"
RETENTION_DAYS="{{ pg_backup_retention_days }}"
TIMESTAMP="$(date +%Y%m%d_%H%M%S)"
BACKUP_FILE="${BACKUP_DIR}/pw_db_${TIMESTAMP}.sql.gz"

echo "[$(date --iso-8601=seconds)] Starting PostgreSQL backup..."

# Dump the database from the Docker container and compress
docker compose -f /opt/performancewest/docker-compose.yml \
  exec -T api-postgres \
  pg_dump -U {{ pg_user }} -d {{ pg_database }} --no-owner --no-privileges \
  | gzip > "${BACKUP_FILE}"

# Verify the backup file is not empty
if [ ! -s "${BACKUP_FILE}" ]; then
  echo "[$(date --iso-8601=seconds)] ERROR: Backup file is empty, removing."
  rm -f "${BACKUP_FILE}"
  exit 1
fi

BACKUP_SIZE="$(du -h "${BACKUP_FILE}" | cut -f1)"
echo "[$(date --iso-8601=seconds)] Backup completed: ${BACKUP_FILE} (${BACKUP_SIZE})"

# Prune backups older than retention period
PRUNED="$(find "${BACKUP_DIR}" -name "pw_db_*.sql.gz" -type f -mtime +${RETENTION_DAYS} -print -delete | wc -l)"
echo "[$(date --iso-8601=seconds)] Pruned ${PRUNED} backup(s) older than ${RETENTION_DAYS} days."

echo "[$(date --iso-8601=seconds)] Backup process finished."