# =================================================================================================
# ARQUIVO: business.itguys.com.br
# AUTOR:   Gemini (Especialista NGINX)
# DATA:    27/09/2025 - 17:22
# VERSÃO:  2.1 (Ajuste de Upload)
#
# DESCRIÇÃO:
# Adicionado bloco de location específico para tratar uploads, aplicando as regras
# de tipo de arquivo definidas no mapa global.
# =================================================================================================

# ==============================================================================
# BLOCO 0: Mapeamento de Tipos de Arquivo para Upload
# ==============================================================================
map $http_content_type $allowed_upload {
    default 0; # Bloqueia tudo por padrão

    # Tipos de arquivo permitidos
    "text/csv" 1;
    "application/pdf" 1;
    "image/jpeg" 1;
    "image/png" 1;
}

# ==============================================================================
# BLOCO 1: Redirecionamento de HTTP para HTTPS
# ==============================================================================
server {
    if ($host = autolab.itguys.com.br) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


    if ($host = business.itguys.com.br) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


    listen 80;
    listen [::]:80;
    server_name business.itguys.com.br autolab.itguys.com.br;

    location /.well-known/acme-challenge/ {
        root /var/www/html;
    }

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

# ==============================================================================
# BLOCO 2: Servidor Principal - Proxy Reverso (HTTPS)
# ==============================================================================
server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name business.itguys.com.br autolab.itguys.com.br;

    # --- Logs Dedicados (Padronizado) ---
    access_log /var/log/nginx/business.itguys.com.br.access.log detailed_proxy;
    access_log /var/log/nginx/business.itguys.com.br.bad-bot.log suspicious_bot if=$block_request;
    error_log /var/log/nginx/business.itguys.com.br.error.log warn;

    # --- Segurança (Integração com nginx.conf) ---
    if ($block_request) {
        return 404;
    }
    limit_req zone=global_limit burst=20 nodelay;
    limit_req zone=bad_bot_limit;
    client_max_body_size 512M;

    # --- Configurações de SSL/TLS (Padronizado) ---
    ssl_certificate /etc/letsencrypt/live/business.itguys.com.br/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/business.itguys.com.br/privkey.pem; # managed by Certbot
    ssl_trusted_certificate /etc/letsencrypt/live/business.itguys.com.br/fullchain.pem;
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_prefer_server_ciphers off;
    ssl_ciphers 'ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384';
    ssl_session_tickets off;
    ssl_stapling on;
    ssl_stapling_verify on;

    # --- Cabeçalhos de Segurança (Otimizados) ---
    add_header Strict-Transport-Security "max-age=63072000; includeSubDomains; preload" always;
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header Content-Security-Policy "default-src 'self'; script-src 'self' https://cdn.jsdelivr.net; style-src 'self' https://cdn.jsdelivr.net; font-src https://cdn.jsdelivr.net; object-src 'none';" always;

    # --- Otimização de Carregamento (Preconnect e Preload) ---
    add_header Link "<https://cdn.jsdelivr.net>; rel=preconnect" always;
    add_header Link "<https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.3/font/bootstrap-icons.min.css>; rel=preload; as=style" always;

    # --- Configurações de Compressão (Brotli & Gzip) ---
    brotli on;
    brotli_comp_level 6;
    brotli_types text/plain text/css application/json application/javascript application/x-javascript text/xml application/xml application/xml+rss image/svg+xml;
    gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_min_length 1024;
    gzip_types text/plain text/css application/json application/javascript application/x-javascript text/xml application/xml application/xml+rss image/svg+xml;

    # --- Otimização de Conexão Keepalive ---
    keepalive_timeout 75s;
    keepalive_requests 1000;

    # --- Estratégia de Cache Segura ---
    set $session_cookie_name "seu_cookie_de_sessao";
    proxy_cache business_cache;
    add_header X-Proxy-Cache $upstream_cache_status;
    proxy_cache_key "$scheme$request_method$host$request_uri$cookie_$session_cookie_name";
    proxy_cache_bypass $cookie_$session_cookie_name $http_authorization;
    proxy_no_cache $cookie_$session_cookie_name $http_authorization;
    proxy_cache_use_stale error timeout http_500 http_502 http_503 http_504;
    proxy_next_upstream_timeout 5s;

    # --- Parâmetros de Proxy (Com Hardening Corrigido) ---
    proxy_set_header Host $http_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_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
    proxy_read_timeout 90s;

    # --- REGRAS DE ROTEAMENTO (LOCATIONS) ---

    # ==============================================================================
    # NOVO BLOCO: Tratamento específico para o endpoint de Upload
    # IMPORTANTE: Adapte "/api/upload/" para o caminho real da sua aplicação.
    # ==============================================================================
    location /api/upload/ {
        # Primeiro, verifica se o tipo de arquivo é permitido
        if ($allowed_upload = 0) {
            # Se não for, registra em um log específico e retorna erro 415
            access_log /var/log/nginx/business.itguys.com.br.upload-blocked.log;
            return 415; # 415 Unsupported Media Type
        }

        # Se o arquivo for permitido, a requisição segue para o backend
        add_header Cache-Control "no-cache, no-store, must-revalidate";
        proxy_pass https://172.16.121.13;
    }

    location ~* \.(?:css|js|mjs|svg|gif|png|jpg|jpeg|ico|webp|wasm|woff2?|ttf|eot)$ {
        proxy_ignore_headers Cache-Control Expires;
        proxy_cache_valid 200 60m;
        proxy_cache_valid any 5m;
        expires 30d;
        add_header Cache-Control "public";
        proxy_pass https://172.16.121.13;
    }

    # Uploads (arquivos estáticos do backend)
    location /uploads/ {
        alias /var/www/html/Ambiente_de_Testes/Oficina/Backend/business/ambiente_python/uploads;
        autoindex off;
    }

    location / {
        add_header Cache-Control "no-cache, no-store, must-revalidate";
        proxy_pass https://172.16.121.13;
    }

    error_page 500 502 503 504 /50x.html;
    location = /50x.html {
        root /usr/share/nginx/html;
        internal;
    }
}