server {
    listen 3000;
    server_name _;
    client_max_body_size 500M;

    # 前端 Vite dev server (3001)
    location /metalinfo {
        proxy_pass http://127.0.0.1:3001;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
    }

    # Java 后端
    location /chat_web_backend {
        proxy_pass http://127.0.0.1:8099;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
    }

    # ===== Stirling PDF (相对路径，直接代理) =====
    location /tool/pdf/ {
        proxy_pass http://127.0.0.1:18080/;
        proxy_set_header Host $host;
        proxy_buffering off;
    }

    # ===== Excalidraw (/assets/ 绝对路径，需要 sub_filter) =====
    location /tool/draw/ {
        proxy_pass http://127.0.0.1:18081/;
        proxy_set_header Host $host;
        proxy_set_header Accept-Encoding "";
        sub_filter_once off;
        sub_filter_types text/html application/javascript;
        sub_filter 'href="/' 'href="/tool/draw/';
        sub_filter 'src="/' 'src="/tool/draw/';
        sub_filter '"/assets/' '"/tool/draw/assets/';
    }
    # Excalidraw 资源回落
    location /assets/ {
        proxy_pass http://127.0.0.1:18081/assets/;
    }

    # ===== TrWebOCR (SPA打包，无外部资源) =====
    location /tool/ocr/ {
        proxy_pass http://127.0.0.1:18083/;
        proxy_set_header Host $host;
    }
    # TrWebOCR API
    location /tool/ocr/api/ {
        proxy_pass http://127.0.0.1:18083/api/;
        proxy_set_header Host $host;
    }

    # ===== LibreTranslate (/static/ 绝对路径) =====
    location /tool/translate/ {
        proxy_pass http://127.0.0.1:18084/;
        proxy_set_header Host $host;
        proxy_set_header Accept-Encoding "";
        sub_filter_once off;
        sub_filter_types text/html;
        sub_filter 'href="/static/' 'href="/tool/translate/static/';
        sub_filter 'src="/static/' 'src="/tool/translate/static/';
        sub_filter 'action="/' 'action="/tool/translate/';
        sub_filter 'url: "/' 'url: "/tool/translate/';
    }
    location /tool/translate/static/ {
        proxy_pass http://127.0.0.1:18084/static/;
    }
    location /tool/translate/translate {
        proxy_pass http://127.0.0.1:18084/translate;
        proxy_set_header Host $host;
    }
    location /tool/translate/detect {
        proxy_pass http://127.0.0.1:18084/detect;
        proxy_set_header Host $host;
    }
    location /tool/translate/languages {
        proxy_pass http://127.0.0.1:18084/languages;
        proxy_set_header Host $host;
    }
    location /tool/translate/frontend/settings {
        proxy_pass http://127.0.0.1:18084/frontend/settings;
        proxy_set_header Host $host;
    }

    # ===== PPTist (相对路径，直接代理) =====
    location /tool/ppt/ {
        proxy_pass http://127.0.0.1:18085/;
        proxy_set_header Host $host;
        proxy_buffering off;
    }
    # PPTist AI 后端 (容器内nginx已配 /pptapi/ -> 18086)
    location /tool/ppt/pptapi/ {
        proxy_pass http://127.0.0.1:18086/;
        proxy_http_version 1.1;
        proxy_set_header Connection "";
        proxy_buffering off;
        proxy_cache off;
    }

    # ===== imgcompress (/_next/ 绝对路径) =====
    location /tool/imgcompress/ {
        proxy_pass http://127.0.0.1:18087/;
        proxy_set_header Host $host;
        proxy_set_header Accept-Encoding "";
        sub_filter_once off;
        sub_filter_types text/html;
        sub_filter 'href="/_next/' 'href="/tool/imgcompress/_next/';
        sub_filter 'src="/_next/' 'src="/tool/imgcompress/_next/';
        sub_filter 'href="/favicon' 'href="/tool/imgcompress/favicon';
    }
    location /tool/imgcompress/_next/ {
        proxy_pass http://127.0.0.1:18087/_next/;
    }
    location /tool/imgcompress/favicon.ico {
        proxy_pass http://127.0.0.1:18087/favicon.ico;
    }
    location /tool/imgcompress/api/ {
        proxy_pass http://127.0.0.1:18087/api/;
        proxy_set_header Host $host;
        proxy_buffering off;
    }

    # ===== Lama Cleaner (/static/ 绝对路径) =====
    location /tool/lama/ {
        proxy_pass http://127.0.0.1:18088/;
        proxy_set_header Host $host;
        proxy_set_header Accept-Encoding "";
        sub_filter_once off;
        sub_filter_types text/html;
        sub_filter 'src="/static/' 'src="/tool/lama/static/';
        sub_filter 'href="/static/' 'href="/tool/lama/static/';
        proxy_buffering off;
    }
    location /tool/lama/static/ {
        proxy_pass http://127.0.0.1:18088/static/;
    }
    location /tool/lama/api/ {
        proxy_pass http://127.0.0.1:18088/api/;
        proxy_set_header Host $host;
        proxy_buffering off;
    }
    location /tool/lama/inpaint {
        proxy_pass http://127.0.0.1:18088/inpaint;
        proxy_set_header Host $host;
        proxy_buffering off;
        proxy_read_timeout 300s;
    }

    # ===== webp2jpg (相对路径为主) =====
    location /tool/webp2jpg/ {
        proxy_pass http://127.0.0.1:18089/;
        proxy_set_header Host $host;
    }
    # webp2jpg 的 cdn 资源
    location /cdn/ {
        proxy_pass http://127.0.0.1:18089/cdn/;
    }
    location /version/ {
        proxy_pass http://127.0.0.1:18089/version/;
    }

    # ===== Overleaf (复杂路径) =====
    location /tool/overleaf/ {
        proxy_pass http://127.0.0.1:18090/;
        proxy_set_header Host $host;
        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_set_header Accept-Encoding "";
        proxy_buffering off;
        sub_filter_once off;
        sub_filter_types text/html application/javascript;
        sub_filter 'href="/' 'href="/tool/overleaf/';
        sub_filter 'src="/' 'src="/tool/overleaf/';
        sub_filter 'action="/' 'action="/tool/overleaf/';
        sub_filter '"/login' '"/tool/overleaf/login';
        sub_filter '"/register' '"/tool/overleaf/register';
        sub_filter '"/project' '"/tool/overleaf/project';
    }
    location /tool/overleaf/stylesheets/ {
        proxy_pass http://127.0.0.1:18090/stylesheets/;
    }
    location /tool/overleaf/js/ {
        proxy_pass http://127.0.0.1:18090/js/;
    }
    location /tool/overleaf/img/ {
        proxy_pass http://127.0.0.1:18090/img/;
    }
    location /tool/overleaf/fonts/ {
        proxy_pass http://127.0.0.1:18090/fonts/;
    }
    location /tool/overleaf/login {
        proxy_pass http://127.0.0.1:18090/login;
        proxy_set_header Host $host;
        proxy_set_header Accept-Encoding "";
        sub_filter_once off;
        sub_filter_types text/html;
        sub_filter 'href="/' 'href="/tool/overleaf/';
        sub_filter 'src="/' 'src="/tool/overleaf/';
        sub_filter 'action="/' 'action="/tool/overleaf/';
    }
    location /tool/overleaf/register {
        proxy_pass http://127.0.0.1:18090/register;
        proxy_set_header Host $host;
    }
    location /tool/overleaf/project {
        proxy_pass http://127.0.0.1:18090/project;
        proxy_set_header Host $host;
        proxy_set_header Accept-Encoding "";
        sub_filter_once off;
        sub_filter_types text/html;
        sub_filter 'href="/' 'href="/tool/overleaf/';
        sub_filter 'src="/' 'src="/tool/overleaf/';
    }
    location /tool/overleaf/socket.io/ {
        proxy_pass http://127.0.0.1:18090/socket.io/;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }
    location /tool/overleaf/launchpad {
        proxy_pass http://127.0.0.1:18090/launchpad;
        proxy_set_header Host $host;
        proxy_set_header Accept-Encoding "";
        sub_filter_once off;
        sub_filter_types text/html;
        sub_filter 'href="/' 'href="/tool/overleaf/';
        sub_filter 'src="/' 'src="/tool/overleaf/';
        sub_filter 'action="/' 'action="/tool/overleaf/';
    }

    # ===== LaTeX 公式编辑器 (CDN外链，无问题) =====
    location /tool/latex/ {
        proxy_pass http://127.0.0.1:18091/;
        proxy_set_header Host $host;
    }

    # 默认跳转前端
    location / {
        return 302 /metalinfo;
    }
}