server {
    listen 80;
    server_name localhost;
    root /usr/share/nginx/html;
    index index.html;

    # Serve static files
    location / {
        try_files $uri $uri/ /index.html;
    }

    # Proxy API requests to backend
    location /api/ {
        proxy_pass http://basil-api:3001;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
        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_set_header Origin $http_origin;
        client_max_body_size 20M;

        # Pass through CORS headers from API
        proxy_hide_header Access-Control-Allow-Origin;
        proxy_hide_header Access-Control-Allow-Methods;
        proxy_hide_header Access-Control-Allow-Headers;
        proxy_hide_header Access-Control-Allow-Credentials;
        add_header Access-Control-Allow-Origin $http_origin always;
        add_header Access-Control-Allow-Methods "GET, POST, PUT, DELETE, OPTIONS" always;
        add_header Access-Control-Allow-Headers "Content-Type, Authorization" always;
        add_header Access-Control-Allow-Credentials "true" always;

        # Handle preflight OPTIONS requests
        if ($request_method = 'OPTIONS') {
            add_header Access-Control-Allow-Origin $http_origin always;
            add_header Access-Control-Allow-Methods "GET, POST, PUT, DELETE, OPTIONS" always;
            add_header Access-Control-Allow-Headers "Content-Type, Authorization" always;
            add_header Access-Control-Allow-Credentials "true" always;
            add_header Content-Length 0;
            add_header Content-Type text/plain;
            return 204;
        }
    }

    # Proxy uploads requests to backend
    location /uploads/ {
        proxy_pass http://basil-api:3001;
        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;
    }
}