server {
    listen 18000;
    client_max_body_size 500M;

    # ===== 1. Stirling PDF =====
    # <base href="/"> 导致相对路径从根开始，用sub_filter改成/pdf/
    # context-path=/pdf，所有PDF资源都在 /pdf/ 下，无冲突
    location /pdf/ {
        proxy_pass http://127.0.0.1:18080/pdf/;
        proxy_set_header Host $host;
        proxy_buffering off;
        client_max_body_size 500M;
    }

    # ===== 2. Excalidraw =====
    location /draw/ {
        proxy_pass http://127.0.0.1:18081/;
        proxy_set_header Host $host;
    }
    location /assets/ { proxy_pass http://127.0.0.1:18081/assets/; }
    location /v1/ai/ {
        proxy_pass http://127.0.0.1:18082/v1/ai/;
        proxy_set_header Host $host;
        proxy_read_timeout 60s;
        proxy_buffering off;
    }

    # ===== 3. TrWebOCR =====
    # 不用 sub_filter（后端返回 gzip 无法改写），直接用精确文件名 location
    location /ocr/ {
        proxy_pass http://127.0.0.1:18083/;
        proxy_set_header Host $host;
        proxy_buffering off;
    }
    # OCR 的 JS/CSS（精确文件名，不会和 Overleaf 冲突）
    location /js/app.7dd3e457.js { proxy_pass http://127.0.0.1:18083/js/app.7dd3e457.js; }
    location /js/chunk-vendors.ae13d15d.js { proxy_pass http://127.0.0.1:18083/js/chunk-vendors.ae13d15d.js; }
    location /css/app.77d50329.css { proxy_pass http://127.0.0.1:18083/css/app.77d50329.css; }
    location /css/chunk-vendors.9d96bc97.css { proxy_pass http://127.0.0.1:18083/css/chunk-vendors.9d96bc97.css; }
    # OCR 的 API
    location /api/tr-run/ {
        proxy_pass http://127.0.0.1:18083/api/tr-run/;
        proxy_set_header Host $host;
        proxy_buffering off;
        client_max_body_size 50M;
    }
    location /tools/ocr_text/ {
        proxy_pass http://127.0.0.1:18083/tools/ocr_text/;
        proxy_set_header Host $host;
    }

    # ===== 4. LibreTranslate =====
    location /translate/ {
        proxy_pass http://127.0.0.1:18084/;
        proxy_set_header Host $host;
    }
    location /static/ { proxy_pass http://127.0.0.1:18084/static/; }
    location /languages { proxy_pass http://127.0.0.1:18084/languages; }
    location /frontend/settings { proxy_pass http://127.0.0.1:18084/frontend/settings; }
    location /detect { proxy_pass http://127.0.0.1:18084/detect; }

    # ===== 5. PPTist =====
    location /ppt/ {
        proxy_pass http://127.0.0.1:18085/;
        proxy_set_header Host $host;
        proxy_buffering off;
    }
    location /pptapi/ {
        proxy_pass http://127.0.0.1:18086/;
        proxy_http_version 1.1;
        proxy_set_header Connection "";
        proxy_buffering off;
        proxy_cache off;
    }

    # ===== 6. imgcompress =====
    location /imgcompress/ {
        proxy_pass http://127.0.0.1:18087/;
        proxy_set_header Host $host;
    }
    location /_next/ { proxy_pass http://127.0.0.1:18087/_next/; }
    location /api/ {
        proxy_pass http://127.0.0.1:18087/api/;
        proxy_set_header Host $host;
        proxy_buffering off;
        client_max_body_size 500M;
    }

    # ===== 7. Lama Cleaner =====
    # sub_filter 不生效（后端 gzip），用精确 location 匹配所有 API 和静态资源
    location /lama/ {
        proxy_pass http://127.0.0.1:18088/;
        proxy_set_header Host $host;
        proxy_buffering off;
    }
    # Lama 静态资源（精确文件名）
    location = /static/js/main.1bd455bc.js { proxy_pass http://127.0.0.1:18088/static/js/main.1bd455bc.js; }
    location = /static/css/main.c28d98ca.css { proxy_pass http://127.0.0.1:18088/static/css/main.c28d98ca.css; }
    # Lama API（全部用精确路径）
    location = /inpaint {
        proxy_pass http://127.0.0.1:18088/inpaint;
        proxy_set_header Host $host;
        proxy_buffering off;
        proxy_read_timeout 300s;
        client_max_body_size 500M;
    }
    location = /inputimage { proxy_pass http://127.0.0.1:18088/inputimage; proxy_set_header Host $host; proxy_buffering off; }
    location = /model { proxy_pass http://127.0.0.1:18088/model; proxy_set_header Host $host; }
    location = /is_desktop { proxy_pass http://127.0.0.1:18088/is_desktop; }
    location = /is_disable_model_switch { proxy_pass http://127.0.0.1:18088/is_disable_model_switch; }
    location = /is_enable_file_manager { proxy_pass http://127.0.0.1:18088/is_enable_file_manager; }
    location = /interactive_seg { proxy_pass http://127.0.0.1:18088/interactive_seg; proxy_set_header Host $host; }
    location = /save_image { proxy_pass http://127.0.0.1:18088/save_image; proxy_set_header Host $host; client_max_body_size 500M; }

    # ===== 8. webp2jpg =====
    location /webp2jpg/ {
        proxy_pass http://127.0.0.1:18089/;
        proxy_set_header Host $host;
    }
    location /cdn/ { proxy_pass http://127.0.0.1:18089/cdn/; }

    # ===== 9. Overleaf =====
    location /overleaf/ {
        proxy_pass http://127.0.0.1:18090/;
        proxy_set_header Host $host;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_buffering off;
    }

    # ===== 10. LaTeX 公式编辑器 =====
    location /latex/ {
        proxy_pass http://127.0.0.1:18091/;
        proxy_set_header Host $host;
    }

    # ===== 默认回落到 Overleaf =====
    location / {
        proxy_pass http://127.0.0.1:18090;
        proxy_set_header Host $host;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_buffering off;
    }
}