package controller
import ("strings"; "github.com/tidwall/gjson")
func detectionHTML(raw []byte, contentType string) string {
	result := gjson.ParseBytes(raw)
	if strings.Contains(contentType, "text/event-stream") {
		result = gjson.Result{}
		for line := range strings.SplitSeq(string(raw), "\n") {
			if strings.HasPrefix(line, "data:") {
				event := gjson.Parse(strings.TrimSpace(strings.TrimPrefix(line, "data:")))
				if event.Get("type").String() == "response.completed" {
					result = event.Get("response")
				}
			}
		}
	}
	if result.Get("status").String() != "completed" {
		return ""
	}
	var output strings.Builder
	for _, item := range result.Get("output").Array() {
		if item.Get("type").String() != "message" {
			continue
		}
		for _, part := range item.Get("content").Array() {
			if part.Get("type").String() == "output_text" {
				output.WriteString(part.Get("text").String())
			}
		}
	}
	html := strings.TrimSpace(output.String())
	lower := strings.ToLower(html)
	start := strings.Index(lower, "<!doctype html")
	if start < 0 {
		start = strings.Index(lower, "<html")
	}
	end := strings.LastIndex(lower, "</html>")
	if start < 0 || end < start || len(html) > 2<<20 {
		return ""
	}
	return html[start : end+7]
}