import os
import pandas as pd
import yaml


# =============================
#        配置加载器
# =============================
class UFConfigLoader:
    def __init__(self, config_path="config/uf_analyze_config.yaml"):
        with open(config_path, "r", encoding="utf-8") as f:
            self.cfg = yaml.safe_load(f)

    @property
    def uf(self):
        return self.cfg["UF"]

    @property
    def params(self):
        return self.cfg["Params"]

    @property
    def paths(self):
        return self.cfg["Paths"]

# =============================
#        数据加载器
# =============================
class UFDataLoader:
    def __init__(self, data_path: str):
        self.data_path = data_path

    def load_all_csv(self) -> pd.DataFrame:
        """读取目录下所有 CSV 并合并成一个 DataFrame"""
        files = [f for f in os.listdir(self.data_path) if f.endswith(".csv")]
        dfs = [pd.read_csv(os.path.join(self.data_path, f), parse_dates=["time"]) for f in files]
        return pd.concat(dfs, ignore_index=True)

    def load_single_csv(self, file_name: str) -> pd.DataFrame:
        """读取单个 CSV"""
        return pd.read_csv(os.path.join(self.data_path, file_name), parse_dates=["time"])