# Nginx configuration for AiBiMagics E-commerce Platform
# Place this file in /etc/nginx/sites-available/aibimagics
# Create symlink: sudo ln -s /etc/nginx/sites-available/aibimagics /etc/nginx/sites-enabled/

upstream aibimagics_app {
    # Gunicorn server
    server 127.0.0.1:8000 fail_timeout=0;
}

# Redirect HTTP to HTTPS
server {
    listen 80;
    listen [::]:80;
    server_name yourdomain.com www.yourdomain.com;
    
    # Let's Encrypt verification
    location /.well-known/acme-challenge/ {
        root /var/www/certbot;
    }
    
    # Redirect all HTTP traffic to HTTPS
    location / {
        return 301 https://$server_name$request_uri;
    }
}

# HTTPS server
server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name yourdomain.com www.yourdomain.com;
    
    # SSL certificates (Let's Encrypt)
    ssl_certificate /etc/letsencrypt/live/yourdomain.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/yourdomain.com/privkey.pem;
    
    # SSL configuration
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers HIGH:!aNULL:!MD5;
    ssl_prefer_server_ciphers on;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 10m;
    
    # Security headers
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header X-XSS-Protection "1; mode=block" always;
    add_header Referrer-Policy "no-referrer-when-downgrade" always;
    add_header Content-Security-Policy "default-src 'self' http: https: data: blob: 'unsafe-inline'" always;
    
    # Max upload size
    client_max_body_size 20M;
    
    # Logging
    access_log /var/log/nginx/aibimagics-access.log;
    error_log /var/log/nginx/aibimagics-error.log;
    
    # Static files
    location /static/ {
        alias /var/www/aibimagics/staticfiles/;
        expires 30d;
        add_header Cache-Control "public, immutable";
    }
    
    # Media files
    location /media/ {
        alias /var/www/aibimagics/media/;
        expires 7d;
        add_header Cache-Control "public";
    }
    
    # Favicon
    location = /favicon.ico {
        access_log off;
        log_not_found off;
        alias /var/www/aibimagics/staticfiles/favicon.ico;
    }
    
    # Robots.txt
    location = /robots.txt {
        access_log off;
        log_not_found off;
        alias /var/www/aibimagics/staticfiles/robots.txt;
    }
    
    # Proxy to Gunicorn
    location / {
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header Host $http_host;
        proxy_set_header X-Real-IP $remote_addr;
        
        # Disable buffering for real-time responses
        proxy_buffering off;
        
        # Timeouts
        proxy_connect_timeout 60s;
        proxy_send_timeout 60s;
        proxy_read_timeout 60s;
        
        # Pass to Gunicorn
        proxy_pass http://aibimagics_app;
        
        # WebSocket support (if needed)
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }
    
    # Error pages
    error_page 500 502 503 504 /50x.html;
    location = /50x.html {
        root /usr/share/nginx/html;
    }
}

# Rate limiting zones
limit_req_zone $binary_remote_addr zone=api_limit:10m rate=10r/s;
limit_req_zone $binary_remote_addr zone=login_limit:10m rate=5r/m;

# Apply rate limiting to API endpoints
server {
    # ... (include in the main server block above)
    
    location /api/ {
        limit_req zone=api_limit burst=20 nodelay;
        # ... rest of proxy configuration
    }
    
    location /api/auth/login/ {
        limit_req zone=login_limit burst=5 nodelay;
        # ... rest of proxy configuration
    }
}