# Project Velocity production API ingress.
#
# Install into /etc/nginx/sites-available/api.desineuron.in.conf and symlink to
# sites-enabled when Nginx is the public TLS terminator. Do not enable this
# 80/443 vhost at the same time as the Caddy public terminator for this domain.

map $http_upgrade $velocity_connection_upgrade {
    default upgrade;
    ""      close;
}

upstream velocity_fastapi_backend {
    server 127.0.0.1:8001 max_fails=3 fail_timeout=10s;
    server 127.0.0.1:8000 backup max_fails=3 fail_timeout=10s;
    keepalive 64;
}

server {
    listen 80;
    listen [::]:80;
    server_name api.desineuron.in;

    location ^~ /.well-known/acme-challenge/ {
        root /var/www/certbot;
        default_type "text/plain";
    }

    location / {
        return 301 https://$host$request_uri;
    }
}

server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name api.desineuron.in;

    ssl_certificate     /etc/letsencrypt/live/api.desineuron.in/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/api.desineuron.in/privkey.pem;
    ssl_protocols       TLSv1.2 TLSv1.3;
    ssl_prefer_server_ciphers off;
    ssl_session_cache   shared:VelocityAPI:20m;
    ssl_session_timeout 1d;
    ssl_session_tickets off;

    client_max_body_size 250m;
    proxy_read_timeout  3600s;
    proxy_send_timeout  3600s;
    proxy_connect_timeout 30s;

    access_log /var/log/nginx/api.desineuron.in.access.log;
    error_log  /var/log/nginx/api.desineuron.in.error.log warn;

    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;

    location = /health {
        proxy_pass http://velocity_fastapi_backend/health;
        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 https;
        proxy_set_header X-Forwarded-Host $host;
    }

    location ~ ^/(api/sentinel/ws|api/oracle/ws|ws|api/.*/ws) {
        proxy_pass http://velocity_fastapi_backend;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $velocity_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 https;
        proxy_set_header X-Forwarded-Host $host;
        proxy_buffering off;
    }

    location / {
        proxy_pass http://velocity_fastapi_backend;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $velocity_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 https;
        proxy_set_header X-Forwarded-Host $host;
        proxy_set_header X-Request-ID $request_id;
        proxy_redirect off;
    }
}