# Novalon 生产环境 Nginx 配置（混合渲染）
#
# 架构：
#   - 静态资源（/_next/static、/fonts、/uploads、图片）由 Nginx 直接服务并长期缓存。
#   - /api/*、/admin/* 代理到 Next.js 运行时（SSR/API Routes）。
#   - 页面请求优先命中 /var/www/novalon 中的预构建静态 HTML；未命中时回源到
#     Next.js 运行时，用于 ISR 首次渲染、Draft Mode 预览及动态路由。
#
# 前置条件：
#   - nextjs_app upstream 指向运行 `next start` 的 Next.js 服务。
#   - 默认使用 docker-compose.server.yml 中的服务名 novalon-website:3000。
#   - 验证：nginx -t && nginx -s reload

user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;

events {
    worker_connections 1024;
    use epoll;
    multi_accept on;
}

http {
    resolver 127.0.0.11 valid=30s ipv6=off;

    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
                    '$status $body_bytes_sent "$http_referer" '
                    '"$http_user_agent" "$http_x_forwarded_for"';

    access_log /var/log/nginx/access.log main;

    server_tokens off;
    client_max_body_size 100M;
    
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-XSS-Protection "1; mode=block" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;

    limit_req_zone $binary_remote_addr zone=general:10m rate=100r/s;

    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;

    gzip on;
    gzip_disable "msie6";
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_buffers 16 8k;
    gzip_http_version 1.1;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+text text/javascript;

    upstream gitea_app {
        server gitea:3000;
    }

    upstream jenkins_app {
        server jenkins:8080;
    }

    # Next.js 混合渲染服务（SSR/ISR/API Routes）
    # 必须与 docker-compose.server.yml 中 Next.js 服务名/端口一致
    upstream nextjs_app {
        server novalon-website:3000;
    }

    # WebSocket 连接升级映射（Next.js HMR / 实时功能使用）
    map $http_upgrade $connection_upgrade {
        default upgrade;
        ''      close;
    }

    # 反向代理通用头（用于 /api/*、/admin/* 及 ISR 回源）
    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;
    proxy_set_header X-Forwarded-Host $host;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection $connection_upgrade;

    # Novalon 主站 - 静态文件 + SSR/ISR 回源
    server {
        listen 80;
        server_name novalon.cn www.novalon.cn;
        
        location /.well-known/acme-challenge/ {
            root /var/www/certbot;
        }

        location / {
            return 301 https://www.novalon.cn$request_uri;
        }
    }

    server {
        listen 443 ssl;
        http2 on;
        server_name novalon.cn www.novalon.cn;

        ssl_certificate /etc/nginx/ssl/fullchain.pem;
        ssl_certificate_key /etc/nginx/ssl/privkey.pem;
        ssl_protocols TLSv1.2 TLSv1.3;
        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;
        ssl_prefer_server_ciphers off;
        ssl_session_cache shared:SSL:10m;
        ssl_session_timeout 1d;
        
        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 X-XSS-Protection "1; mode=block" always;
        add_header Referrer-Policy "strict-origin-when-cross-origin" always;

        # 静态文件根目录
        root /var/www/novalon;
        index index.html;

        # 静态资源长期缓存
        location /_next/static/ {
            expires 1y;
            add_header Cache-Control "public, max-age=31536000, immutable";
            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;
            try_files $uri =404;
        }

        # 字体文件缓存
        location ~* \.(ttf|woff|woff2|eot)$ {
            expires 1y;
            add_header Cache-Control "public, max-age=31536000, immutable";
            add_header Access-Control-Allow-Origin "*";
            add_header Strict-Transport-Security "max-age=63072000; includeSubDomains; preload" always;
            try_files $uri =404;
        }

        # 图片文件缓存
        location ~* \.(svg|jpg|jpeg|png|gif|webp|avif|ico)$ {
            expires 1y;
            add_header Cache-Control "public, max-age=31536000, immutable";
            add_header Strict-Transport-Security "max-age=63072000; includeSubDomains; preload" always;
            try_files $uri =404;
        }

        # 上传媒体文件（本地存储时落盘到 public/uploads/）
        location /uploads/ {
            expires 1y;
            add_header Cache-Control "public, max-age=31536000, immutable";
            add_header Strict-Transport-Security "max-age=63072000; includeSubDomains; preload" always;
            try_files $uri =404;
        }

        # Let's Encrypt ACME challenge
        location /.well-known/acme-challenge/ {
            root /var/www/certbot;
        }

        # CMS / 联系表单 / 认证等 API 路由：禁止缓存，代理到 Next.js
        location /api/ {
            limit_req zone=general burst=50 nodelay;
            proxy_pass http://nextjs_app;
            proxy_hide_header X-Powered-By;
            add_header Cache-Control "no-store, no-cache, must-revalidate" always;
            add_header Strict-Transport-Security "max-age=63072000; includeSubDomains; preload" always;
            add_header X-Frame-Options "SAMEORIGIN" always;
            add_header X-XSS-Protection "1; mode=block" always;
            add_header X-Content-Type-Options "nosniff" always;
            add_header Referrer-Policy "strict-origin-when-cross-origin" always;
        }

        # 管理后台与 Draft Mode：代理到 Next.js，Cookie 透传以支持 draft 预览
        location /admin/ {
            limit_req zone=general burst=20 nodelay;
            proxy_pass http://nextjs_app;
            proxy_hide_header X-Powered-By;
            add_header Strict-Transport-Security "max-age=63072000; includeSubDomains; preload" always;
            add_header X-Frame-Options "SAMEORIGIN" always;
            add_header X-XSS-Protection "1; mode=block" always;
            add_header X-Content-Type-Options "nosniff" always;
            add_header Referrer-Policy "strict-origin-when-cross-origin" always;
        }

        # Next.js 静态导出的页面路由 + ISR/SSR 回源
        # 1) 优先命中已构建的静态 HTML/资源
        # 2) 未命中时转交给 Next.js 运行时（ISR 首次渲染、Draft 预览、动态路由）
        location / {
            limit_req zone=general burst=20 nodelay;
            try_files $uri $uri.html $uri/ @nextjs;
        }

        # ISR/SSR 回源 named location
        location @nextjs {
            proxy_pass http://nextjs_app;
            proxy_hide_header X-Powered-By;
        }

        # 自定义 404 页面（Nginx 层面未命中且 Next.js 也返回 404 时展示）
        error_page 404 /404.html;

        # 优化文件传输
        sendfile on;
        tcp_nopush on;
        tcp_nodelay on;
    }

    include /etc/nginx/conf.d/*.conf;
}