#!/bin/bash
# Database Restore Script for Overseas Appointment System
# Usage: ./restore-database.sh <backup_file.sql.gz>

set -e

# Check if backup file is provided
if [ -z "$1" ]; then
    echo "Usage: $0 <backup_file.sql.gz>"
    echo "Available backups:"
    ls -lh /backups/mysql/*.sql.gz 2>/dev/null || echo "No backups found"
    exit 1
fi

BACKUP_FILE="$1"

# Check if backup file exists
if [ ! -f "${BACKUP_FILE}" ]; then
    echo "ERROR: Backup file not found: ${BACKUP_FILE}"
    exit 1
fi

# Database credentials (from environment or defaults)
DB_HOST="${DB_HOST:-mysql}"
DB_PORT="${DB_PORT:-3306}"
DB_NAME="${DB_NAME:-overseas_appointment}"
DB_USER="${DB_USER:-app_user}"
DB_PASSWORD="${DB_PASSWORD:-}"

echo "[$(date)] Starting database restore from: ${BACKUP_FILE}"
echo "WARNING: This will overwrite the current database!"
read -p "Are you sure you want to continue? (yes/no): " confirm

if [ "$confirm" != "yes" ]; then
    echo "Restore cancelled."
    exit 0
fi

# Restore database
echo "[$(date)] Restoring database..."
gunzip -c "${BACKUP_FILE}" | mysql \
    --host="${DB_HOST}" \
    --port="${DB_PORT}" \
    --user="${DB_USER}" \
    --password="${DB_PASSWORD}" \
    "${DB_NAME}"

if [ $? -eq 0 ]; then
    echo "[$(date)] Database restored successfully!"
else
    echo "[$(date)] ERROR: Database restore failed!"
    exit 1
fi