# Nexus v6.0 — Nginx Production Config (HTTPS Template)
# *** Copy this file and replace ALL {{PLACEHOLDER}} values before deploying ***
#
# {{SERVER_NAME}}  = your domain (e.g. nexus.example.com)
# {{DEPLOY_DIR}}   = installation root (e.g. /opt/nexus or /www/wwwroot/nexus.example.com)
# {{LOG_DIR}}      = nginx log directory (e.g. /var/log/nginx or /www/wwwlogs)
# {{SSL_CERT}}     = SSL certificate fullchain path
# {{SSL_KEY}}      = SSL private key path

# ── Upstream: Python FastAPI backend ──
upstream nexus_api {
    server 127.0.0.1:8600;
    keepalive 32;
}

# ── HTTP → HTTPS redirect ──
server {
    listen 80;
    server_name {{SERVER_NAME}};
    return 301 https://$host$request_uri;
}

# ── HTTPS ──
server {
    listen 443 ssl http2;
    server_name {{SERVER_NAME}};

    # SSL
    ssl_certificate {{SSL_CERT}};
    ssl_certificate_key {{SSL_KEY}};
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers HIGH:!aNULL:!MD5;
    ssl_prefer_server_ciphers on;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 10m;

    # HSTS
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;

    # Document root = frontend static files
    root {{DEPLOY_DIR}}/web/app;
    index index.html;

    # ── Python API proxy ──
    location /api/ {
        proxy_pass http://nexus_api;
        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 300s;
        proxy_send_timeout 300s;
        proxy_connect_timeout 10s;
    }

    # WebSocket access log: omit query string so JWT is not written to disk
    log_format nexus_ws '$remote_addr - [$time_local] "$request_method $uri" $status $body_bytes_sent';

    # ── WebSocket proxy (alerts + WebSSH terminal) ──
    location /ws/ {
        access_log {{LOG_DIR}}/{{SERVER_NAME}}.ws.log nexus_ws;
        proxy_pass http://nexus_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_read_timeout 3600s;
        proxy_send_timeout 3600s;
    }

    # ── Health endpoint ──
    location /health {
        proxy_pass http://nexus_api;
        proxy_set_header Host $host;
    }

    # ── Static assets (cache aggressively) ──
    location ~* \.(css|js|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
        expires 7d;
        add_header Cache-Control "public, immutable";
        # Must re-declare HSTS — nginx location-level add_header replaces ALL parent add_header directives
        add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
        try_files $uri =404;
    }

    # ── Deny sensitive files ──
    location ~ /\. {
        deny all;
    }
    location ~ /data/config\.json$ {
        deny all;
    }

    # ── Redirect bare page paths to /app/ (for reverse-proxy deployments) ──
    # If you use proxy_pass instead of root+try_files, uncomment this block:
    # location ~ ^/(login|index|servers|files|push|scripts|script-executions|credentials|schedules|retries|commands|alerts|audit|settings|install|terminal|assets)\.html$ {
    #     return 301 /app/$1.html;
    # }

    # ── Static HTML pages (no SPA — each page is standalone) ──
    location / {
        try_files $uri $uri/ =404;
    }

    # ── Logging ──
    access_log {{LOG_DIR}}/{{SERVER_NAME}}.log;
    error_log  {{LOG_DIR}}/{{SERVER_NAME}}.error.log;

    # ── Upload limit ──
    client_max_body_size 500m;
}