upstream backend {
    server backend:3000;
}

upstream frontend {
    server frontend:3001;
}

# Redirect all HTTP to HTTPS
server {
    listen 80;
    server_name _;

    # Let certbot answer ACME challenges over HTTP
    location /.well-known/acme-challenge/ {
        root /var/www/certbot;
    }

    # Everything else -> HTTPS
    location / {
        return 301 https://$host$request_uri;
    }
}

# HTTPS server
server {
    listen 443 ssl;
    # Replace with your actual hostname:
    server_name staging.example.com;

    # --- TLS certificates (managed by certbot) ---
    ssl_certificate     /etc/letsencrypt/live/staging.example.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/staging.example.com/privkey.pem;

    # --- Modern TLS settings ---
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers 'ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384';
    ssl_prefer_server_ciphers on;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 1d;
    ssl_session_tickets off;

    # --- Security headers ---
    add_header Strict-Transport-Security "max-age=63072000; includeSubDomains" always;
    add_header X-Content-Type-Options nosniff always;
    add_header X-Frame-Options SAMEORIGIN always;

    # --- Proxy routes (same as default.conf) ---

    # API requests -> NestJS backend
    location /api/ {
        proxy_pass http://backend;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        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_cache_bypass $http_upgrade;
    }

    # AI recommendation endpoint needs a longer timeout (up to 3 minutes)
    location /api/investment-planning/recommendations {
        proxy_pass http://backend;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        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_cache_bypass $http_upgrade;
        proxy_read_timeout 180s;
        proxy_connect_timeout 10s;
        proxy_send_timeout 30s;
    }

    # AI health-score endpoint also needs a longer timeout
    location /api/health-scores/calculate {
        proxy_pass http://backend;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        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_cache_bypass $http_upgrade;
        proxy_read_timeout 180s;
        proxy_connect_timeout 10s;
        proxy_send_timeout 30s;
    }

    # Everything else -> Vite dev server (frontend)
    location / {
        proxy_pass http://frontend;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        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_cache_bypass $http_upgrade;
    }
}