# Global cache configuration
proxy_cache_path /var/cache/nginx levels=1:2 keys_zone=discoursio_cache:10m max_size=1g inactive=60m use_temp_path=off;

# Rate limiting zones
limit_conn_zone $binary_remote_addr zone=addr:10m;
limit_req_zone $binary_remote_addr zone=req_zone:10m rate=20r/s;

# HTTP to HTTPS redirect
server {
    listen 80;
    server_name {{ $.NOSSL_SERVER_NAME }};
    return 301 https://$host$request_uri;
}

# Main HTTPS server
server {
    listen 443 ssl http2;
    server_name {{ $.SSL_SERVER_NAME }};

    # SSL configuration
    ssl_certificate {{ $.APP_SSL_PATH }}/server.crt;
    ssl_certificate_key {{ $.APP_SSL_PATH }}/server.key;
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_prefer_server_ciphers off;
    ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA384;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 10m;
    ssl_session_tickets off;

    # Gzip configuration
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_types
        text/plain
        text/css
        text/xml
        text/javascript
        application/javascript
        application/xml+rss
        application/json
        application/xml
        image/svg+xml
        font/ttf
        font/otf
        font/woff
        font/woff2;

    # Security headers
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" 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 "strict-origin-when-cross-origin" always;

    # Logging
    access_log /var/log/nginx/{{ $.APP }}-access.log;
    error_log /var/log/nginx/{{ $.APP }}-error.log;

    # Performance settings
    client_max_body_size 100M;
    client_header_timeout 60s;
    client_body_timeout 60s;
    send_timeout 60s;
    keepalive_timeout 65s;
    keepalive_requests 1000;

    # Rate limiting
    limit_conn addr 100;
    limit_req zone=req_zone burst=20 nodelay;

    # Main application proxy
    location / {
        proxy_pass http://{{ $.APP }}-8000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $http_connection;
        proxy_set_header Host $http_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_set_header X-Forwarded-Port $server_port;
        proxy_set_header X-Request-Start $msec;

        # Proxy buffering
        proxy_buffering on;
        proxy_buffer_size 4k;
        proxy_buffers 8 4k;
        proxy_busy_buffers_size 8k;

        # Cache settings for dynamic content
        proxy_cache discoursio_cache;
        proxy_cache_revalidate on;
        proxy_cache_min_uses 1;
        proxy_cache_use_stale error timeout updating http_500 http_502 http_503 http_504;
        proxy_cache_background_update on;
        proxy_cache_lock on;
        proxy_cache_valid 200 302 10m;
        proxy_cache_valid 404 1m;
    }

    # GraphQL endpoint with specific settings
    location /graphql {
        proxy_pass http://{{ $.APP }}-8000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $http_connection;
        proxy_set_header Host $http_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_set_header X-Forwarded-Port $server_port;
        proxy_set_header X-Request-Start $msec;

        # Large buffering for GraphQL responses
        proxy_buffering on;
        proxy_buffer_size 8k;
        proxy_buffers 16 8k;
        proxy_busy_buffers_size 16k;

        # GraphQL specific timeouts
        proxy_read_timeout 300s;
        proxy_connect_timeout 60s;
        proxy_send_timeout 60s;

        # Disable caching for GraphQL
        proxy_cache off;
        add_header Cache-Control "no-cache, no-store, must-revalidate";
        add_header Pragma "no-cache";
        add_header Expires "0";
    }

    # Static assets with aggressive caching
    location ~* \.(css|js|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot|otf)$ {
        proxy_pass http://{{ $.APP }}-8000;
        proxy_set_header Host $http_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;

        # Aggressive caching for static assets
        expires 1y;
        add_header Cache-Control "public, immutable";
        add_header Vary "Accept-Encoding";
    }

    # Include custom nginx configurations
    include {{ $.DOKKU_ROOT }}/{{ $.APP }}/nginx.conf.d/*.conf;
}

{{ range $upstream_port := $.PROXY_UPSTREAM_PORTS | split " " }}
upstream {{ $.APP }}-{{ $upstream_port }} {
    {{ range $listeners := $.DOKKU_APP_WEB_LISTENERS | split " " }}
        {{ $listener_list := $listeners | split ":" }}
        {{ $listener_ip := index $listener_list 0 }}
        {{ $listener_port := index $listener_list 1 }}
        server {{ $listener_ip }}:{{ $upstream_port }};
    {{ end }}
}
{{ end }}