class Iter_FloatSwitch:
    @classmethod
    def INPUT_TYPES(s):
        return {
            "required": {
                "output_index": ("INT", {"default": 0, "min": 0, "max": 0xffffffffffffffff}),
                "input_count": ("INT", {"default": 2, "min": 1, "max": 128, "step": 1}),
                "use_last_input": ("BOOLEAN", {"default": True}),
            },
        }

    RETURN_TYPES = ("FLOAT",)
    FUNCTION = "switch_float"
    CATEGORY = "CustomNodes/Iterators"

    def switch_float(self, output_index, input_count, use_last_input, **kwargs):
        # 1. 計算目標索引
        target_idx = output_index % input_count
        
        # 2. 搜尋有效浮點數
        res_float = None
        for i in range(target_idx, -1, -1):
            val = kwargs.get(f"float_{i}")
            # 注意：在 Python 中 0.0 是 False，所以要檢查是否為 None
            if val is not None or not use_last_input:
                res_float = val
                break
        
        return (float(res_float),)