"""集中配置（环境变量可覆盖）。"""

from __future__ import annotations

from functools import lru_cache
from pathlib import Path

from pydantic import Field
from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    model_config = SettingsConfigDict(
        env_file=".env",
        env_file_encoding="utf-8",
        extra="ignore",
    )

    # 服务
    mi_port: int = Field(default=5170, alias="MI_PORT")
    tz: str = Field(default="Asia/Shanghai", alias="TZ")
    auth_secret: str = Field(default="change-me", alias="AUTH_SECRET")
    admin_username: str = Field(default="admin", alias="ADMIN_USERNAME")
    admin_password: str = Field(default="admin123", alias="ADMIN_PASSWORD")
    env_file: str = Field(default=".env", alias="ENV_FILE")
    backup_dir: str = Field(default="/root/market_intel_backups", alias="BACKUP_DIR")

    # OKX
    okx_api_key: str = Field(default="", alias="OKX_API_KEY")
    okx_api_secret: str = Field(default="", alias="OKX_API_SECRET")
    okx_api_passphrase: str = Field(default="", alias="OKX_API_PASSPHRASE")
    okx_base_url: str = Field(default="https://www.okx.com", alias="OKX_BASE_URL")
    okx_proxy: str = Field(default="", alias="OKX_PROXY")

    index_inst_id: str = Field(default="ETH-USD", alias="INDEX_INST_ID")
    option_inst_family: str = Field(default="ETH-USD_UM", alias="OPTION_INST_FAMILY")
    underlying: str = Field(default="ETH", alias="UNDERLYING")

    sample_interval_sec: int = Field(default=30, alias="SAMPLE_INTERVAL_SEC", ge=15, le=120)
    index_sample_interval_sec: int = Field(default=60, alias="INDEX_SAMPLE_INTERVAL_SEC", ge=15)
    instruments_refresh_sec: int = Field(default=300, alias="INSTRUMENTS_REFRESH_SEC", ge=60)
    min_option_hours: float = Field(default=12.0, alias="MIN_OPTION_HOURS", ge=0)
    min_option_leverage: float = Field(default=100.0, alias="MIN_OPTION_LEVERAGE", ge=1)

    mi_db_path: str = Field(default="./data/market_intel.db", alias="MI_DB_PATH")
    bucket_minutes: int = Field(default=60, alias="BUCKET_MINUTES")
    month_range_mode: str = Field(default="rolling_30", alias="MONTH_RANGE_MODE")
    settle_backfill_interval_sec: int = Field(
        default=300, alias="SETTLE_BACKFILL_INTERVAL_SEC", ge=60
    )

    # 企微告警
    wecom_enabled: bool = Field(default=False, alias="WECOM_ENABLED")
    wecom_webhook_url: str = Field(default="", alias="WECOM_WEBHOOK_URL")
    wecom_machine_name: str = Field(default="", alias="WECOM_MACHINE_NAME")
    alert_fail_threshold: int = Field(default=5, alias="ALERT_FAIL_THRESHOLD", ge=1)

    @property
    def db_path(self) -> Path:
        return Path(self.mi_db_path)

    @property
    def env_file_path(self) -> Path:
        return Path(self.env_file)

    @property
    def backup_dir_path(self) -> Path:
        return Path(self.backup_dir)


def reload_settings() -> Settings:
    get_settings.cache_clear()
    return get_settings()


@lru_cache
def get_settings() -> Settings:
    return Settings()