server {
    listen 80;
    listen [::]:80;
    server_name teknavglobal.com www.teknavglobal.com;
    return 301 https://www.teknavglobal.com$request_uri;
}

server {
    listen 443 ssl;
    listen [::]:443 ssl;
    http2 on;
    server_name teknavglobal.com;
    return 301 https://www.teknavglobal.com$request_uri;

    ssl_certificate     /etc/letsencrypt/live/teknavglobal.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/teknavglobal.com/privkey.pem;
}

server {
    listen 443 ssl;
    listen [::]:443 ssl;
    http2 on;
    server_name www.teknavglobal.com;

    ssl_certificate     /etc/letsencrypt/live/teknavglobal.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/teknavglobal.com/privkey.pem;
    ssl_protocols       TLSv1.2 TLSv1.3;
    ssl_ciphers         HIGH:!aNULL:!MD5;

    root /srv/teknav/global/dist;
    index index.html;

    # Security headers
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
    add_header X-Content-Type-Options nosniff always;
    add_header X-Frame-Options SAMEORIGIN always;
    add_header Referrer-Policy strict-origin-when-cross-origin always;
    add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" always;
    add_header Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; font-src 'self'; img-src 'self' data: blob:; connect-src 'self'; frame-ancestors 'none';" always;

    server_tokens off;

    # Proxy API to same backend as teknav.ir
    location /api/ {
        proxy_pass         http://127.0.0.1:3010;
        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    60s;
    }

    # SSE — no buffering
    location ~ ^/api/v1/(auth/notifications|admin)/stream {
        proxy_pass         http://127.0.0.1:3010;
        proxy_http_version 1.1;
        proxy_set_header   Connection '';
        proxy_set_header   Cache-Control 'no-cache';
        proxy_set_header   X-Accel-Buffering no;
        proxy_buffering    off;
        chunked_transfer_encoding on;
    }

    # Static article pages (pre-generated)
    location /article/ {
        try_files $uri $uri/index.html @spa;
        gzip_static on;
        brotli_static on;
        expires 1h;
        add_header Cache-Control "public, max-age=3600, stale-while-revalidate=86400";
    }

    # Assets with long cache
    location /assets/ {
        expires 1y;
        add_header Cache-Control "public, max-age=31536000, immutable";
        gzip_static on;
        brotli_static on;
    }

    location /fonts/ {
        expires 1y;
        add_header Cache-Control "public, max-age=31536000, immutable";
    }

    location /images/ {
        expires 30d;
        add_header Cache-Control "public, max-age=2592000";
    }

    # Block dotfiles and sensitive paths
    location ~ /\. { deny all; }
    location = /ACCOUNTS.md { deny all; return 404; }

    # SPA fallback
    location @spa {
        try_files /index.html =404;
    }

    location / {
        try_files $uri $uri/ @spa;
        gzip_static on;
        brotli_static on;
    }

    # Feeds and sitemaps — no cache
    location ~ \.(xml|json)$ {
        expires -1;
        add_header Cache-Control "no-cache, no-store";
    }

    # Rate limiting
    limit_req_zone $binary_remote_addr zone=global_en:10m rate=300r/m;
    limit_req_zone $binary_remote_addr zone=api_en:10m rate=300r/m;

    limit_req zone=global_en burst=200 nodelay;
    location /api/ { limit_req zone=api_en burst=200 nodelay; }

    # Errors
    error_page 404 /index.html;
    error_page 429 @too_many;
    error_page 500 502 503 504 @server_error;

    location @too_many {
        default_type application/json;
        return 429 '{"error":"too_many_requests","retryAfter":60}';
    }
    location @server_error {
        default_type application/json;
        return 503 '{"error":"service_unavailable"}';
    }
}