# Tx OS web — serves the built React/Vite SPA and reverse-proxies the
# API + Socket.IO traffic to the api container on the private network.
upstream tx_api {
    server api:8080;
}

server {
    listen 80;
    server_name _;
    root /usr/share/nginx/html;
    index index.html;

    # Health endpoint for compose / load balancer probes.
    location = /healthz {
        access_log off;
        return 200 "ok\n";
        add_header Content-Type text/plain;
    }

    # Socket.IO upgrade — must come before the generic /api/ block so the
    # WebSocket handshake gets the upgrade headers it needs.
    location /api/socket.io/ {
        proxy_pass http://tx_api;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header 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 $scheme;
        proxy_read_timeout 1h;
    }

    # All other API calls.
    location /api/ {
        proxy_pass http://tx_api;
        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;
        client_max_body_size 25m;
    }

    # SPA: serve hashed assets with long-cache; fall back to index.html.
    location ~* \.(?:js|css|woff2?|png|jpg|jpeg|gif|svg|ico|webp|map)$ {
        expires 30d;
        add_header Cache-Control "public, immutable";
        try_files $uri =404;
    }

    location / {
        try_files $uri $uri/ /index.html;
        add_header Cache-Control "no-cache";
    }
}