package service

// pickModelScopeImageURL 从各类抠图 API 返回体中递归提取图片 URL（通用工具函数）
func pickModelScopeImageURL(v interface{}) string {
	switch t := v.(type) {
	case string:
		if isHTTPURL(t) {
			return t
		}
	case map[string]interface{}:
		for _, key := range []string{"url", "image_url", "output_url", "result_url", "cutout_url"} {
			if u, ok := t[key].(string); ok && isHTTPURL(u) {
				return u
			}
		}
		if images, ok := t["images"].([]interface{}); ok && len(images) > 0 {
			if item, ok := images[0].(map[string]interface{}); ok {
				if u := pickModelScopeImageURL(item); u != "" {
					return u
				}
			}
			if u, ok := images[0].(string); ok && isHTTPURL(u) {
				return u
			}
		}
		if output, ok := t["output"].(map[string]interface{}); ok {
			if u := pickModelScopeImageURL(output); u != "" {
				return u
			}
		}
		if result, ok := t["result"].(map[string]interface{}); ok {
			if u := pickModelScopeImageURL(result); u != "" {
				return u
			}
		}
		if data, ok := t["data"].(map[string]interface{}); ok {
			if u := pickModelScopeImageURL(data); u != "" {
				return u
			}
		}
		for _, val := range t {
			if u := pickModelScopeImageURL(val); u != "" {
				return u
			}
		}
	case []interface{}:
		for _, item := range t {
			if u := pickModelScopeImageURL(item); u != "" {
				return u
			}
		}
	}
	return ""
}