server {
    listen 80;
    listen 443 ssl;
    server_name ai.sggai.site;

    ssl_certificate /etc/letsencrypt/live/ai.sggai.site/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/ai.sggai.site/privkey.pem;

    location ^~ /.well-known/acme-challenge/ {
        root /var/www;
        default_type text/plain;
        try_files $uri =404;
    }

    client_max_body_size 200m;

    gzip off;
    gunzip off;

    proxy_http_version 1.1;
    proxy_set_header Host $host;
    proxy_set_header Authorization $http_authorization;
    proxy_set_header Content-Type $http_content_type;
    proxy_set_header Accept $http_accept;
    proxy_set_header User-Agent $http_user_agent;
    proxy_set_header Originator $http_originator;
    proxy_set_header Session_id $http_session_id;
    proxy_set_header X-Codex-Beta-Features $http_x_codex_beta_features;
    proxy_set_header X-Codex-Turn-Metadata $http_x_codex_turn_metadata;
    proxy_set_header X-Stainless-Arch $http_x_stainless_arch;
    proxy_set_header X-Stainless-Lang $http_x_stainless_lang;
    proxy_set_header X-Stainless-Os $http_x_stainless_os;
    proxy_set_header X-Stainless-Package-Version $http_x_stainless_package_version;
    proxy_set_header X-Stainless-Retry-Count $http_x_stainless_retry_count;
    proxy_set_header X-Stainless-Runtime $http_x_stainless_runtime;
    proxy_set_header X-Stainless-Runtime-Version $http_x_stainless_runtime_version;
    proxy_set_header X-Stainless-Timeout $http_x_stainless_timeout;
    proxy_set_header X-App $http_x_app;
    proxy_set_header Anthropic-Beta $http_anthropic_beta;
    proxy_set_header Anthropic-Dangerous-Direct-Browser-Access $http_anthropic_dangerous_direct_browser_access;
    proxy_set_header Anthropic-Version $http_anthropic_version;
    proxy_set_header Accept-Encoding "";
    proxy_set_header X-Real-IP "";
    proxy_set_header X-Forwarded-For "";
    proxy_set_header X-Forwarded-Proto "";
    proxy_set_header X-Forwarded-Host "";
    proxy_set_header X-Forwarded-Port "";
    proxy_set_header Connection "";
    proxy_buffering off;
    proxy_request_buffering off;
    proxy_cache off;
    proxy_cache_bypass 1;
    proxy_connect_timeout 600s;
    proxy_read_timeout 3600s;
    proxy_send_timeout 3600s;

    location = /v1/chat/completions {
        client_body_buffer_size 16k;

        content_by_lua_block {
            local backend = "@ai_sggai_site_backend"
            local max_body_bytes = 1024

            if ngx.req.get_method() ~= "POST" then
                return ngx.exec(backend)
            end

            local content_length = tonumber(ngx.var.http_content_length)
            if not content_length then
                return ngx.exec(backend)
            end

            if content_length > max_body_bytes then
                return ngx.exec(backend)
            end

            ngx.req.read_body()

            local body = ngx.req.get_body_data()
            if not body or #body > max_body_bytes then
                return ngx.exec(backend)
            end

            local cjson = require "cjson.safe"
            local payload = cjson.decode(body)
            if type(payload) ~= "table" or payload.stream ~= false then
                return ngx.exec(backend)
            end

            if type(payload.messages) ~= "table" then
                return ngx.exec(backend)
            end

            local has_hi_content = false

            for _, message in ipairs(payload.messages) do
                if type(message) == "table" and message.content == "hi" then
                    has_hi_content = true
                    break
                end
            end

            if not has_hi_content then
                return ngx.exec(backend)
            end

            local matched_request_log = {
                method = ngx.req.get_method(),
                uri = ngx.var.request_uri,
                content_length = content_length,
                content_type = ngx.var.http_content_type,
                user_agent = ngx.var.http_user_agent,
                body = body
            }
            ngx.log(ngx.ERR, "[ai.sggai.site] matched short POST request: ", cjson.encode(matched_request_log) or body)

            ngx.status = ngx.HTTP_OK
            ngx.header["Content-Type"] = "application/json; charset=utf-8"
            ngx.say([[{
  "id": "chatcmpl-mock",
  "object": "chat.completion",
  "created": 1716030000,
  "model": "xxx",
  "choices": [
    {
      "index": 0,
      "message": { "role": "assistant", "content": "ok" },
      "finish_reason": "stop"
    }
  ],
  "usage": { "prompt_tokens": 1, "completion_tokens": 1, "total_tokens": 2 }
}]])
            return ngx.exit(ngx.HTTP_OK)
        }
    }

    location @ai_sggai_site_backend {
        proxy_pass http://10.1.0.1:3001;
    }

    location / {
        proxy_pass http://10.1.0.1:3001;
    }
}