import sys
import os
sys.path.append(os.path.dirname(os.path.dirname(os.path.dirname(__file__))))

from typing import Dict, List, Optional, Any
from persistence.data_store import DataStore

class DataStoreManager:
    _instance = None
    
    def __new__(cls):
        if cls._instance is None:
            cls._instance = super().__new__(cls)
            cls._instance._store = DataStore()
        return cls._instance

    @property
    def current_project(self) -> Optional[str]:
        return self._store.current_project

    @property
    def current_param(self) -> Optional[str]:
        return self._store.current_param

    @current_param.setter
    def current_param(self, param_name: str):
        self._store.current_param = param_name

    def create_project(self, name: str, description: str = "") -> bool:
        """创建新项目"""
        return self._store.save_project(name, description)

    def save_param(self, project_name: str, param_name: str, 
                  channel_settings: Dict[int, Dict], description: str = "") -> bool:
        """保存参数配置"""
        success = self._store.add_param_to_project(project_name, param_name, 
                                              channel_settings, description)
        if success:
            self._store.current_param = param_name
        return success

    def get_project(self, name: str) -> Optional[Dict]:
        """获取项目数据"""
        project_data = self._store.load_project(name)
        return project_data.__dict__ if project_data else None

    def get_param_data(self, project_name: str, param_name: str) -> Dict:
        """获取参数数据"""
        return self._store.load_param_data(project_name, param_name)

    def get_projects(self) -> List[str]:
        """获取所有项目列表"""
        return self._store.list_projects()

    def get_params(self, project_name: str) -> List[str]:
        """获取项目的所有参数列表"""
        return self._store.list_params(project_name)

    def remove_project(self, name: str) -> bool:
        """删除项目"""
        return self._store.delete_project(name)

    def remove_param(self, project_name: str, param_name: str) -> bool:
        """删除参数"""
        return self._store.delete_param(project_name, param_name)

    def update_param_value(self, project_name: str, param_name: str, 
                      parameter_path: str, new_value: Any) -> bool:
        """更新参数值"""
        try:
            # 加载参数数据
            param_data = self._store.load_param_data(project_name, param_name)
            
            # 解析参数路径，更新对应的值
            parts = parameter_path.split('.')
            if parts[0] == 'dataset' and parts[1] == 'tuning_parameters':
                if parts[2] == 'mix_parameters':
                    # 例如: dataset.tuning_parameters.mix_parameters[0].mix_left_data
                    idx = int(parts[3].split('[')[1].split(']')[0])
                    field = parts[4]
                    if idx in param_data:
                        param_data[idx][field] = new_value
                elif parts[2] == 'eq_parameters':
                    # 例如: dataset.tuning_parameters.eq_parameters[0].fc
                    idx = int(parts[3].split('[')[1].split(']')[0])
                    field = parts[4]
                    channel_id = idx // 20  # 假设每个通道最多20个滤波器
                    filter_idx = idx % 20
                    
                    if channel_id in param_data and 'filters' in param_data[channel_id]:
                        filters = param_data[channel_id]['filters']
                        if filter_idx < len(filters):
                            filters[filter_idx][field] = new_value
                elif parts[2] == 'delay_parameters':
                    # 例如: dataset.tuning_parameters.delay_parameters[0].delay_data
                    idx = int(parts[3].split('[')[1].split(']')[0])
                    field = parts[4]
                    if idx in param_data:
                        param_data[idx]['delay_data'] = new_value
                elif parts[2] == 'volume_parameters':
                    # 例如: dataset.tuning_parameters.volume_parameters[0].vol_data
                    idx = int(parts[3].split('[')[1].split(']')[0])
                    field = parts[4]
                    if idx in param_data:
                        param_data[idx]['vol_data'] = new_value
            
            # 保存更新后的参数数据
            return self._store.add_param_to_project(project_name, param_name, param_data)
        except Exception as e:
            return False

    @classmethod
    def get_instance(cls) -> 'DataStoreManager':
        """获取 DataStoreManager 实例"""
        if cls._instance is None:
            cls._instance = DataStoreManager()
        return cls._instance