# Wildcard subdomain routing for Nexus POS
# DNS: *.nexusautoparts.com -> server IP (Cloudflare wildcard)

# Rate limiting zone
limit_req_zone $binary_remote_addr zone=pos_login:10m rate=10r/s;

# Upstream backends
upstream nexus_main {
    server 127.0.0.1:5000;
}

upstream nexus_pos {
    server 127.0.0.1:5001;
}

upstream nexus_quart {
    server 127.0.0.1:5002;
}

# Gzip 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/rss+xml application/atom+xml image/svg+xml;

# Main site (no subdomain)
server {
    listen 80;
    server_name nexusautoparts.com www.nexusautoparts.com;

    # Static asset caching
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
        expires 6M;
        add_header Cache-Control "public, immutable";
        add_header X-Content-Type-Options nosniff always;
    }

    # Auto-serve minified JS/CSS when available (transparent to templates)
    location ~* ^(.+)\.js$ {
        try_files $1.min.js $uri =404;
        expires 6M;
        add_header Cache-Control "public, immutable";
        add_header X-Content-Type-Options nosniff always;
    }

    location ~* ^(.+)\.css$ {
        try_files $1.min.css $uri =404;
        expires 6M;
        add_header Cache-Control "public, immutable";
        add_header X-Content-Type-Options nosniff always;
    }

    location / {
        proxy_pass http://nexus_main;
        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_connect_timeout 10s;
        proxy_send_timeout 30s;
        proxy_read_timeout 30s;
        proxy_buffering on;
        proxy_buffer_size 4k;
        proxy_buffers 8 4k;
    }
}

# POS subdomains (wildcard)
server {
    listen 80;
    server_name ~^(?<tenant>.+)\.nexusautoparts\.com$;

    # Security headers
    add_header X-Content-Type-Options nosniff always;
    add_header X-Frame-Options SAMEORIGIN always;

    # Static asset caching
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
        expires 6M;
        add_header Cache-Control "public, immutable";
        add_header X-Content-Type-Options nosniff always;
    }

    location / {
        proxy_pass http://nexus_pos;
        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 X-Tenant-Subdomain $tenant;
        proxy_connect_timeout 10s;
        proxy_send_timeout 30s;
        proxy_read_timeout 30s;
        proxy_buffering on;
        proxy_buffer_size 4k;
        proxy_buffers 8 4k;
    }

    # Async catalog search via Quart+asyncpg (non-blocking I/O)
    location /pos/api/catalog/async-search {
        proxy_pass http://nexus_quart;
        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 X-Tenant-Subdomain $tenant;
        proxy_connect_timeout 5s;
        proxy_send_timeout 30s;
        proxy_read_timeout 30s;
        proxy_buffering off;
    }

    # Rate limit login endpoint
    location /pos/api/auth/login {
        limit_req zone=pos_login burst=5 nodelay;
        proxy_pass http://nexus_pos;
        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 X-Tenant-Subdomain $tenant;
    }
}