# -*- coding: utf-8 -*-
"""config.py: 纯相对路径动态配置加载器"""
import os
import yaml

class Config:
    def __init__(self):
        self._config_data = {}
        self.PLANT_NAME = ""
        self.PLANT_DIR = "" 
        
    def load(self, plant_name: str):
        """传入水厂名称 (如 'longting')，自动挂载该水厂所有相对路径"""
        self.PLANT_NAME = plant_name
        self.PLANT_DIR = f"./{plant_name}"
        
        yaml_path = f"{self.PLANT_DIR}/config.yaml"
        if not os.path.exists(yaml_path):
            raise FileNotFoundError(f"找不到配置文件: {yaml_path}")
            
        with open(yaml_path, 'r', encoding='utf-8') as f:
            self._config_data = yaml.safe_load(f)
            
        self._parse_config()
        self._init_directories()

    def _parse_config(self):
        files = self._config_data.get('files', {})
        
        # 1. 目录路径
        self.DATASET_SENSOR_DIR = f"{self.PLANT_DIR}/datasets"
        self.RESULT_SAVE_DIR = f"{self.PLANT_DIR}/results"
        self.MODEL_SAVE_DIR = self.PLANT_DIR  # 模型保存在水厂根目录
        
        # 2. 完整文件相对路径 
        self.THRESHOLD_FILENAME = f"{self.PLANT_DIR}/{files.get('threshold_filename', 'sensor_threshold.xlsx')}"
        self.ABNORMAL_LINK_FILENAME = f"{self.PLANT_DIR}/{files.get('abnormal_link_filename', 'abnormal_link.xlsx')}"
        self.MODEL_FILE_PATH = f"{self.PLANT_DIR}/{files.get('model_filename', 'ppo_tracing_model.pth')}"
        self.TEST_RESULT_FILENAME = files.get('test_result_filename', 'Final_Test_Report.xlsx') # 这个留给 pd.ExcelWriter 处理
        self.SENSOR_FILE_PREFIX = files.get('sensor_file_prefix', 'data_process_')

        # 3. 传感器与关键字
        sensors = self._config_data.get('sensors', {})
        self.KEYWORD_LAYER = sensors.get('keyword_layer', 'One_layer')
        self.KEYWORD_DEVICE = sensors.get('keyword_device', 'Device')
        self.TRIGGER_SENSORS = sensors.get('trigger_sensors', [])

        # 4. 数据处理参数
        data = self._config_data.get('data_processing', {})
        self.SENSOR_FILE_NUM_RANGE = tuple(data.get('sensor_file_num_range', (1, 10)))
        self.ORIGINAL_SAMPLE_INTERVAL = data.get('original_sample_interval', 4)
        self.TARGET_SAMPLE_INTERVAL = data.get('target_sample_interval', 20)
        self.WINDOW_DURATION_MIN = data.get('window_duration_min', 40)
        
        # 衍生变量
        self.POINTS_PER_WINDOW = int((self.WINDOW_DURATION_MIN * 60) / self.TARGET_SAMPLE_INTERVAL)
        self.WINDOW_STEP = self.POINTS_PER_WINDOW // 2
        
        self.VALID_DATA_RATIO = data.get('valid_data_ratio', 0.6)
        self.WINDOW_ANOMALY_THRESHOLD = data.get('window_anomaly_threshold', 0.2)
        self.TRAIN_TEST_SPLIT = data.get('train_test_split', 0.8)
        self.TRIGGER_SCORE_THRESH = data.get('trigger_score_thresh', 0.5)
        self.ABSOLUTE_SCORE_WEIGHT = data.get('absolute_score_weight', 0.6)
        self.DYNAMIC_SCORE_WEIGHT = data.get('dynamic_score_weight', 0.4)
        self.MAD_HISTORY_WINDOW = data.get('mad_history_window', 360)
        self.MAD_THRESHOLD = data.get('mad_threshold', 3.0)

        # 5. 强化学习参数
        rl = self._config_data.get('rl_params', {})
        self.MIN_PATH_LENGTH = rl.get('min_path_length', 3)
        self.MAX_PATH_LENGTH = rl.get('max_path_length', 6)
        self.EMBEDDING_DIM = rl.get('embedding_dim', 64)
        self.HIDDEN_DIM = rl.get('hidden_dim', 256)
        self.PPO_LR = float(rl.get('ppo_lr', 3e-4))
        self.PPO_GAMMA = rl.get('ppo_gamma', 0.90)
        self.PPO_EPS_CLIP = rl.get('ppo_eps_clip', 0.2)
        self.PPO_K_EPOCHS = rl.get('ppo_k_epochs', 10)
        self.PPO_BATCH_SIZE = rl.get('ppo_batch_size', 64)
        self.BC_EPOCHS = rl.get('bc_epochs', 20000)
        self.RL_EPISODES = rl.get('rl_episodes', 20)

    def _init_directories(self):
        """确保当前水厂的数据和结果目录存在"""
        os.makedirs(self.DATASET_SENSOR_DIR, exist_ok=True)
        os.makedirs(self.RESULT_SAVE_DIR, exist_ok=True)

# 实例化全局单例
config = Config()