import json
import os

class PresetManager:
    def __init__(self, filepath="presets.json"):
        self.filepath = filepath
        self.presets = self.load_presets()

    def save_preset(self, name, layout_params_list):
        """保存预案到字典"""
        self.presets[name] = {
            "layouts": layout_params_list
        }
        self.save_to_file()

    def get_preset(self, name):
        """获取预案"""
        return self.presets.get(name)

    def load_presets(self):
        """从文件加载"""
        if os.path.exists(self.filepath):
            with open(self.filepath, 'r') as f:
                return json.load(f)
        return {}

    def save_to_file(self):
        """写入文件"""
        with open(self.filepath, 'w') as f:
            json.dump(self.presets, f, indent=4)