#!/bin/bash
# Minimales Nginx-Setup für statische Frontend Dateien

set -e

echo "=== Nginx Static Frontend Setup ==="

FRONTEND_DIR="/opt/zmb-webui/frontend/out"
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
RED='\033[0;31m'
NC='\033[0m'

# Verify frontend export exists
echo -e "${YELLOW}1. Checking frontend export...${NC}"
if [ ! -d "$FRONTEND_DIR" ]; then
    echo -e "${RED}✗ Frontend export not found: $FRONTEND_DIR${NC}"
    exit 1
fi
FILE_COUNT=$(find "$FRONTEND_DIR" -type f | wc -l)
echo -e "${GREEN}✓ Frontend export found ($FILE_COUNT files)${NC}"

# Configure nginx
echo -e "${YELLOW}2. Configuring nginx...${NC}"
mkdir -p /etc/nginx/sites-available /etc/nginx/sites-enabled
sudo tee /etc/nginx/sites-available/zmb-webui > /dev/null <<'NGINX_CONF'
server {
    listen 9090;
    server_name _;

    # Security headers
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header X-XSS-Protection "1; mode=block" always;

    # Compression
    gzip on;
    gzip_min_length 1000;
    gzip_types text/plain text/css application/json application/javascript;
    gzip_comp_level 5;

    # Static assets cache (7 days)
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
        root /opt/zmb-webui/frontend/out;
        expires 7d;
        add_header Cache-Control "public, max-age=604800, immutable";
        access_log off;
    }

    # Frontend static pages (SPA routing)
    location / {
        root /opt/zmb-webui/frontend/out;
        try_files $uri $uri/ /index.html;
        add_header Cache-Control "public, max-age=3600";
    }

    # API routes → Backend
    location /api/ {
        proxy_pass http://localhost:8000;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_connect_timeout 10s;
        proxy_read_timeout 30s;
    }

    # Health check
    location /health {
        proxy_pass http://localhost:8000;
        access_log off;
    }

    # Logging
    access_log /var/log/nginx/zmb-webui-access.log combined;
    error_log /var/log/nginx/zmb-webui-error.log warn;
}
NGINX_CONF
echo -e "${GREEN}✓ Nginx configured${NC}"

# Enable nginx site
echo -e "${YELLOW}3. Enabling nginx site...${NC}"
sudo rm -f /etc/nginx/sites-enabled/default
sudo ln -sf /etc/nginx/sites-available/zmb-webui /etc/nginx/sites-enabled/zmb-webui
echo -e "${GREEN}✓ Nginx site enabled${NC}"

# Test and reload nginx
echo -e "${YELLOW}4. Testing and reloading nginx...${NC}"
sudo nginx -t 2>&1 | grep -v "warning\|redundant"
sudo systemctl reload nginx
echo -e "${GREEN}✓ Nginx reloaded${NC}"

# Clean up old services
echo -e "${YELLOW}5. Cleaning up Node.js service (if exists)...${NC}"
if sudo systemctl is-enabled zmb-webui-frontend 2>/dev/null; then
    sudo systemctl disable zmb-webui-frontend
    sudo systemctl stop zmb-webui-frontend 2>/dev/null || true
    sudo rm -f /etc/systemd/system/zmb-webui-frontend.service
    sudo systemctl daemon-reload
fi
echo -e "${GREEN}✓ Cleanup complete${NC}"

# Verify
echo -e "${YELLOW}6. Testing connectivity...${NC}"
sleep 1
if curl -s http://localhost:9090 > /dev/null 2>&1; then
    echo -e "${GREEN}✓ Frontend accessible on port 9090${NC}"
else
    echo -e "${YELLOW}⚠ Testing with curl (may need time to warm up)${NC}"
fi

# Summary
echo ""
echo -e "${GREEN}=== Setup Complete ===${NC}"
echo ""
echo "Frontend: http://$(hostname -I | awk '{print $1}'):9090"
echo "API:      http://localhost:8000"
echo ""
echo "Service: systemctl reload nginx"
echo "Logs:    tail -f /var/log/nginx/zmb-webui-*.log"
echo ""