#!/bin/bash

BACKUP_DIR="/tmp/backup_repo"
echo "Backup daemon started..."

# Configure git globally so commits succeed
git config --global user.email "backup-bot@huggingface.space"
git config --global user.name "Hugging Face Backup Bot"

while true; do
  # Wait for 30 minutes first (or sleep on startup so the app is up first)
  echo "Backup daemon sleeping for 30 minutes..."
  sleep 1800

  if [ -n "$GITHUB_PAT" ] && [ -n "$GITHUB_REPO" ] && [ -n "$GITHUB_BRANCH" ]; then
    echo "Running pg_dump..."
    mkdir -p /tmp/backup_temp
    su - postgres -c "pg_dump -d postiz-db-local -F p" > /tmp/backup_temp/backup.sql || {
      echo "pg_dump failed."
      continue
    }

    echo "Cloning git backup repo..."
    rm -rf "$BACKUP_DIR"
    git clone "https://${GITHUB_PAT}@github.com/${GITHUB_REPO}.git" "$BACKUP_DIR" || {
      echo "Failed to clone backup repo."
      continue
    }

    cd "$BACKUP_DIR"
    # Ensure branch exists
    git checkout "$GITHUB_BRANCH" || git checkout -b "$GITHUB_BRANCH" || true
    
    cp /tmp/backup_temp/backup.sql "$BACKUP_DIR/backup.sql"
    
    # Check if there are changes to push
    if [ -n "$(git status --porcelain)" ]; then
      echo "Database changes detected. Committing and pushing..."
      git add backup.sql
      git commit -m "Auto-backup $(date -uIs)"
      git push origin "$GITHUB_BRANCH" || echo "Git push failed."
    else
      echo "No database changes detected."
    fi
  else
    echo "GitHub backup configuration variables missing. Skipping this backup cycle."
  fi
done