export const ALIYUN_QWEN_PRESET_MODELS = ["qwen3.5-plus", "qwen3.5-flash"] as const;

export const ALIYUN_QWEN_CUSTOM_MODEL_VALUE = "__custom__";

export function isAliyunQwenPresetModel(model: string | null | undefined) {
  const trimmed = model?.trim() ?? "";
  return ALIYUN_QWEN_PRESET_MODELS.includes(trimmed as (typeof ALIYUN_QWEN_PRESET_MODELS)[number]);
}

export function resolveAliyunQwenModelSelection(model: string | null | undefined) {
  return isAliyunQwenPresetModel(model) ? (model?.trim() ?? "") : ALIYUN_QWEN_CUSTOM_MODEL_VALUE;
}

export function resolveAliyunQwenModelValue(selection: string, customModel: string) {
  if (selection === ALIYUN_QWEN_CUSTOM_MODEL_VALUE) {
    return customModel.trim();
  }
  return selection.trim();
}