"""
统一配置加载。从 core/config/pipeline_config.yaml 读取基础配置，
从 core/config/.env 或环境变量覆盖敏感凭证。
所有路径均基于 core/ 目录内部，不依赖外部 models/。
"""
import os
from pathlib import Path
from typing import Any, Dict, List, Optional

import yaml

# core/ 目录（本文件所在目录）
CORE_ROOT = Path(__file__).resolve().parent


def _resolve_env_vars(value: Any) -> Any:
    """递归解析 ${VAR} 格式的环境变量引用。"""
    if isinstance(value, str) and value.startswith("${") and value.endswith("}"):
        env_key = value[2:-1]
        if ":-" in env_key:
            env_key, default = env_key.split(":-", 1)
            return os.environ.get(env_key, default)
        return os.environ.get(env_key, value)
    if isinstance(value, dict):
        return {k: _resolve_env_vars(v) for k, v in value.items()}
    if isinstance(value, list):
        return [_resolve_env_vars(v) for v in value]
    return value


def _load_dotenv(dotenv_path: Optional[Path] = None) -> None:
    if dotenv_path is None:
        dotenv_path = CORE_ROOT / "config" / ".env"
    if not dotenv_path.exists():
        return
    with open(dotenv_path, "r", encoding="utf-8") as f:
        for line in f:
            line = line.strip()
            if not line or line.startswith("#"):
                continue
            if "=" not in line:
                continue
            key, _, val = line.partition("=")
            key = key.strip()
            val = val.strip().strip("'\"")
            if key not in os.environ:
                os.environ[key] = val


class PipelineConfig:
    """管线统一配置，所有路径基于 core/ 目录。"""

    def __init__(self, config_path: Optional[str] = None, plant: str = "xishan"):
        _load_dotenv()

        if config_path is None:
            config_path = str(CORE_ROOT / "config" / "pipeline_config.yaml")

        with open(config_path, "r", encoding="utf-8") as f:
            raw = yaml.safe_load(f)

        self._data: Dict[str, Any] = _resolve_env_vars(raw)
        self.plant = plant

    # ---- API ----
    @property
    def api_base_url(self) -> str:
        return self._data["api"]["base_url"]

    @property
    def project_id(self) -> int:
        return int(self._data["api"].get("project_id", 92))

    # ---- Login ----
    @property
    def login_user(self) -> str:
        return self._data["api"].get("login_user", "admin")

    @property
    def login_password(self) -> str:
        return self._data["api"].get("login_password", "")

    @property
    def login_dep_id(self) -> str:
        return str(self._data["api"].get("login_dep_id", "135"))

    # ---- Database ----
    @property
    def db_config(self) -> Dict[str, Any]:
        return dict(self._data.get("database", {}))

    # ---- SCADA ----
    @property
    def scada_secret(self) -> str:
        return self._data["scada"]["secret"]

    # ---- Dry Run ----
    @property
    def dry_run(self) -> bool:
        return self._data.get("dry_run", True)

    # ---- UF ----
    @property
    def uf_model_filename(self) -> str:
        return self._data["uf"].get("model_filename", "48h_dqn_model.zip")

    @property
    def uf_is_times(self) -> bool:
        return self._data["uf"].get("is_times", False)

    @property
    def uf_trigger_value(self) -> int:
        return int(self._data["uf"].get("trigger_value", 95))

    @property
    def uf_poll_interval(self) -> int:
        return int(self._data["uf"].get("poll_interval", 2))

    @property
    def uf_units(self) -> List[str]:
        units_map = self._data["uf"].get("units", {})
        if isinstance(units_map, dict):
            return units_map.get(self.plant, ["UF1"])
        return units_map

    # ---- Diagnosis ----
    @property
    def diagnosis_interval_minutes(self) -> int:
        return int(self._data["diagnosis"].get("interval_minutes", 40))

    # ---- RO ----
    @property
    def ro_tmp_limit(self) -> float:
        return float(self._data["ro"].get("tmp_limit", 0.21))

    @property
    def ro_dpt_type(self) -> str:
        return self._data["ro"].get("dpt_type", "DPT_1")

    @property
    def ro_units(self) -> List[str]:
        units_map = self._data["ro"].get("units", {})
        if isinstance(units_map, dict):
            return units_map.get(self.plant, ["RO1", "RO2"])
        return units_map

    @property
    def ro_schedule(self) -> str:
        return self._data["ro"].get("schedule", "daily")

    @property
    def ro_history_paths(self) -> Dict[str, str]:
        return self._data["ro"].get("history_paths", {})

    # ---- Paths (全部基于 core/models/) ----
    @property
    def uf_root(self) -> Path:
        return CORE_ROOT / "models" / "uf-rl"

    @property
    def uf_model_path(self) -> Path:
        return self.uf_root / self.plant / self.uf_model_filename

    @property
    def uf_env_config_path(self) -> Path:
        return self.uf_root / self.plant / "env_config.yaml"

    @property
    def diagnosis_root(self) -> Path:
        return CORE_ROOT / "models" / "dynamic_anomaly_diagnosis"

    @property
    def ro_root(self) -> Path:
        return CORE_ROOT / "models" / "ro_mechanism_predict"

    # ---- General ----
    def get(self, key_path: str, default: Any = None) -> Any:
        keys = key_path.split(".")
        value = self._data
        for k in keys:
            if isinstance(value, dict) and k in value:
                value = value[k]
            else:
                return default
        return value