#!/bin/sh
set -e

# Configuration
BACKUP_DIR="/backups"

if [ -z "$1" ]; then
  echo "Usage: ./restore.sh <backup-file>"
  echo ""
  echo "Available backups:"
  ls -lh "${BACKUP_DIR}"/postgres_*.sql.gz 2>/dev/null || echo "No backups found"
  exit 1
fi

BACKUP_FILE="$1"

if [ ! -f "${BACKUP_FILE}" ]; then
  echo "❌ Backup file not found: ${BACKUP_FILE}"
  exit 1
fi

echo "======================================"
echo "PostgreSQL Restore - $(date)"
echo "======================================"
echo "📦 Backup file: ${BACKUP_FILE}"
echo ""

# Wait for PostgreSQL to be ready
until PGPASSWORD="${POSTGRES_PASSWORD}" pg_isready -h "${POSTGRES_HOST}" -U "${POSTGRES_USER}" -d postgres; do
  echo "⏳ Waiting for PostgreSQL..."
  sleep 5
done

echo "✅ PostgreSQL is ready"
echo ""

# Warning
echo "⚠️  WARNING: This will DROP and RECREATE the database!"
echo "⚠️  Database: ${POSTGRES_DB}"
echo ""
echo "Press Ctrl+C to cancel, or wait 10 seconds to continue..."
sleep 10

echo ""
echo "🔄 Restoring database..."

# Restore backup
gunzip -c "${BACKUP_FILE}" | PGPASSWORD="${POSTGRES_PASSWORD}" psql \
  -h "${POSTGRES_HOST}" \
  -U "${POSTGRES_USER}" \
  -d postgres

echo ""
echo "✅ Database restored successfully"
echo "======================================"