#!/bin/bash
# SME Server Password Change Application Installation Script
# Compatible with Python 3.6.8 and Flask 2.0.3

set -e

# Configuration
APP_NAME="smeserver-password-app"
APP_DIR="/opt/$APP_NAME"
SERVICE_NAME="smeserver-password-web"
SERVICE_PORT=5000
PYTHON_BIN="/usr/bin/python3"

echo "Installing SME Server Password Change Application (Python 3.6.8 Compatible)..."

# Check if running as root
if [ "$EUID" -ne 0 ]; then
    echo "Please run this script as root"
    exit 1
fi

# Check if we're on an SME Server
if [ ! -f "/etc/e-smith-release" ] && [ ! -f "/etc/sme-release" ]; then
    echo "Warning: This doesn't appear to be an SME Server system"
    echo "The application may not work correctly without SME Server tools"
fi

# Check Python version
PYTHON_VERSION=$(python3 -c "import sys; print('{}.{}'.format(sys.version_info.major, sys.version_info.minor))")
echo "Detected Python version: $PYTHON_VERSION"

if [ "$PYTHON_VERSION" != "3.6" ]; then
    echo "Warning: This application is optimized for Python 3.6.8"
    echo "Current version: $PYTHON_VERSION"
    echo "Continuing with installation..."
fi

# Create application directory
echo "Creating application directory..."
mkdir -p "$APP_DIR"

# Copy application files
echo "Copying application files..."
cp -r ./* "$APP_DIR/"

# Set permissions
echo "Setting permissions..."
chown -R root:root "$APP_DIR"
chmod +x "$APP_DIR/app.py"
chmod +x "$APP_DIR/install.sh"

# Install Python dependencies compatible with Python 3.6.8
echo "Installing Python dependencies (Python 3.6.8 compatible)..."
if command -v pip3 &> /dev/null; then
    pip3 install Flask==2.0.3 Flask-CORS==3.0.10 Werkzeug==2.0.3
elif command -v yum &> /dev/null; then
    yum install -y python3-pip
    pip3 install Flask==2.0.3 Flask-CORS==3.0.10 Werkzeug==2.0.3
else
    echo "Warning: Could not install Python dependencies automatically"
    echo "Please install Flask 2.0.3 and Flask-CORS 3.0.10 manually"
fi

# Create systemd service file
echo "Creating systemd service..."
cat > "/etc/systemd/system/$SERVICE_NAME.service" << EOF
[Unit]
Description=SME Server Password Change Web Application
After=network.target

[Service]
Type=simple
User=root
WorkingDirectory=$APP_DIR
Environment=FLASK_APP=app.py
Environment=FLASK_ENV=production
ExecStart=$PYTHON_BIN $APP_DIR/app.py
Restart=always
RestartSec=10

[Install]
WantedBy=multi-user.target
EOF

# Reload systemd and enable service
echo "Enabling service..."
systemctl daemon-reload
systemctl enable "$SERVICE_NAME"

# Start the service
echo "Starting service..."
systemctl start "$SERVICE_NAME"

# Check service status
if systemctl is-active --quiet "$SERVICE_NAME"; then
    echo "✓ Service started successfully"
    echo "✓ Password change application is running on port $SERVICE_PORT"
    echo ""
    echo "Access the application at: http://your-server-ip:$SERVICE_PORT"
    echo ""
    echo "Python 3.6.8 and Flask 2.0.3 compatibility confirmed"
    echo ""
    echo "To check service status: systemctl status $SERVICE_NAME"
    echo "To view logs: journalctl -u $SERVICE_NAME -f"
    echo "To stop service: systemctl stop $SERVICE_NAME"
    echo "To restart service: systemctl restart $SERVICE_NAME"
else
    echo "✗ Failed to start service"
    echo "Check logs with: journalctl -u $SERVICE_NAME"
    exit 1
fi

echo ""
echo "Installation completed successfully!"
echo "Application is compatible with Python 3.6.8 and Flask 2.0.3"