# BuildFlow 门户网站 Nginx 配置
# - SPA history 路由回退到 index.html
# - 静态资源长缓存（hash 文件名）
# - Gzip 压缩
# - 安全响应头

server {
    listen       5173;
    listen  [::]:5173;
    server_name  _;

    root   /usr/share/nginx/html;
    index  index.html;

    # Gzip 压缩
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_comp_level 6;
    gzip_types
        text/plain
        text/css
        text/xml
        text/javascript
        application/javascript
        application/json
        application/xml
        application/rss+xml
        image/svg+xml
        font/woff
        font/woff2;

    # 安全响应头
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
    add_header X-XSS-Protection "1; mode=block" always;
    add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" always;

    # 静态资源长缓存（Vite 产物带 hash 文件名，可安全 immutable）
    location /assets/ {
        expires 1y;
        add_header Cache-Control "public, immutable";
        access_log off;
        try_files $uri =404;
    }

    # 图片资源缓存
    location ~* \.(?:jpg|jpeg|png|gif|ico|svg|webp|avif)$ {
        expires 30d;
        add_header Cache-Control "public";
        access_log off;
        try_files $uri =404;
    }

    # 字体资源缓存
    location ~* \.(?:woff2?|ttf|otf|eot)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
        add_header Access-Control-Allow-Origin "*";
        access_log off;
        try_files $uri =404;
    }

    # SPA history 路由回退（加安全头，nginx add_header 继承规则：location 有自己的 add_header 时不继承 server）
    location / {
        try_files $uri $uri/ /index.html;
        add_header X-Frame-Options "SAMEORIGIN" always;
        add_header X-Content-Type-Options "nosniff" always;
        add_header Referrer-Policy "strict-origin-when-cross-origin" always;
        add_header X-XSS-Protection "1; mode=block" always;
        add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" always;
    }

    # index.html 不缓存，保证发布后立即生效
    location = /index.html {
        add_header Cache-Control "no-cache, no-store, must-revalidate";
        # 安全响应头（同理重复，防继承覆盖）
        add_header X-Frame-Options "SAMEORIGIN" always;
        add_header X-Content-Type-Options "nosniff" always;
        add_header Referrer-Policy "strict-origin-when-cross-origin" always;
        add_header X-XSS-Protection "1; mode=block" always;
        add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" always;
        expires 0;
    }

    # 自定义错误页回退到首页（SPA 友好）
    error_page 404 /index.html;
}