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

    client_max_body_size 100M;

    gzip on;
    gzip_types text/plain text/css application/json application/javascript text/xml;
    gzip_min_length 1000;

    # Ignore client-supplied forwarded proto by default. Operators may explicitly trust a
    # sanitizing upstream proxy; only canonical http/https values are then accepted.
    set $proxy_x_forwarded_proto $scheme;
    set $forwarded_proto_source "${SKILLHUB_TRUST_FORWARDED_PROTO}:$http_x_forwarded_proto";
    if ($forwarded_proto_source ~* "^true:https$") {
        set $proxy_x_forwarded_proto https;
    }
    if ($forwarded_proto_source ~* "^true:http$") {
        set $proxy_x_forwarded_proto http;
    }

    # Sub-path routing is generated by docker-entrypoint.d/20-base-path.sh. The glob
    # tolerates its absence (root deployment or config-only tests); the default below
    # keeps $skillhub_forwarded_prefix defined even when the file is not present.
    set $skillhub_forwarded_prefix "";
    include /etc/nginx/skillhub-base-path*.conf;

    location / {
        try_files $uri $uri/ /index.html;
    }

    location /api/ {
        proxy_pass ${SKILLHUB_API_UPSTREAM};
        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 $proxy_x_forwarded_proto;
        proxy_set_header X-Forwarded-Prefix $skillhub_forwarded_prefix;
    }

    location /oauth2/ {
        proxy_pass ${SKILLHUB_API_UPSTREAM};
        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 $proxy_x_forwarded_proto;
        proxy_set_header X-Forwarded-Prefix $skillhub_forwarded_prefix;
    }

    location /login/oauth2/ {
        proxy_pass ${SKILLHUB_API_UPSTREAM};
        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 $proxy_x_forwarded_proto;
        proxy_set_header X-Forwarded-Prefix $skillhub_forwarded_prefix;
    }

    location /.well-known/ {
        proxy_pass ${SKILLHUB_API_UPSTREAM};
        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 $proxy_x_forwarded_proto;
        proxy_set_header X-Forwarded-Prefix $skillhub_forwarded_prefix;
    }

    location /assets/ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    location = /registry/skill.md {
        default_type text/plain;
        add_header Content-Disposition "inline";
        add_header X-Content-Type-Options "nosniff";
        try_files $uri =404;
    }

    location = /runtime-config.js {
        add_header Cache-Control "no-store";
        try_files $uri =404;
    }

    location /nginx-health {
        return 200 'ok';
        add_header Content-Type text/plain;
    }
}