worker_processes auto;
error_log /dev/stderr warn;
pid /tmp/nginx.pid;

events {
    worker_connections 1024;
    use epoll;
    multi_accept on;
}

http {
    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    # Logging
    access_log /dev/stdout combined;

    # Request buffering - absorb slow clients
    client_body_buffer_size 128k;
    client_max_body_size 10m;
    client_body_timeout 60s;
    client_header_timeout 60s;

    # Response buffering
    proxy_buffering on;
    proxy_buffer_size 4k;
    proxy_buffers 8 32k;
    proxy_busy_buffers_size 64k;

    # Keepalive
    keepalive_timeout 65;
    keepalive_requests 1000;

    # Compression
    gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_types text/plain text/css text/xml application/json application/javascript application/xml+rss application/atom+xml image/svg+xml;

    # Upstream - uvicorn (use 'web' for docker-compose, '127.0.0.1' for single container)
    upstream app {
        server web:8001;
        keepalive 32;
    }

    server {
        listen 8000;
        server_name _;

        # Static files - serve directly with caching
        location /static/ {
            alias /app/kjvstudy_org/static/;
            expires 1y;
            add_header Cache-Control "public, immutable";
            access_log off;
        }

        # Service worker - special cache headers
        location = /sw.js {
            proxy_pass http://app;
            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;
            add_header Cache-Control "no-cache";
        }

        # All other requests - proxy to uvicorn
        location / {
            proxy_pass http://app;
            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_set_header Connection "";

            # Request buffering
            proxy_request_buffering on;

            # Timeouts
            proxy_connect_timeout 60s;
            proxy_send_timeout 60s;
            proxy_read_timeout 60s;
        }

        # Health check endpoint - bypass buffering for speed
        location = /api/health {
            proxy_pass http://app;
            proxy_http_version 1.1;
            proxy_set_header Host $host;
            proxy_buffering off;
        }
    }
}