upstream qwen_tts_backend {
    server 127.0.0.1:8000;
}

server {
    listen 80;
    server_name your-domain.com;

    client_max_body_size 100M;
    client_body_timeout 300s;
    proxy_read_timeout 300s;
    proxy_connect_timeout 300s;
    proxy_send_timeout 300s;

    location / {
        proxy_pass http://qwen_tts_backend;
        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 'Access-Control-Allow-Origin' '*' always;
        add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS' always;
        add_header 'Access-Control-Allow-Headers' 'Authorization, Content-Type' always;

        if ($request_method = 'OPTIONS') {
            add_header 'Access-Control-Allow-Origin' '*';
            add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS';
            add_header 'Access-Control-Allow-Headers' 'Authorization, Content-Type';
            add_header 'Content-Length' '0';
            add_header 'Content-Type' 'text/plain';
            return 204;
        }
    }

    location /outputs/ {
        alias /opt/qwen3-tts-backend/outputs/;
        autoindex off;
        add_header Cache-Control "public, max-age=3600";
        add_header Content-Disposition "attachment";
    }

    location /health {
        proxy_pass http://qwen_tts_backend/health;
        proxy_set_header Host $host;
        access_log off;
    }

    location /metrics {
        proxy_pass http://qwen_tts_backend/metrics;
        proxy_set_header Host $host;
        allow 127.0.0.1;
        deny all;
    }
}