from __future__ import annotations

import os
from pathlib import Path
from typing import Any

import yaml
from pydantic import Field
from pydantic_settings import BaseSettings


class KISConfig(BaseSettings):
    app_key: str = Field(default="", alias="KIS_APP_KEY")
    app_secret: str = Field(default="", alias="KIS_APP_SECRET")
    account_no: str = Field(default="", alias="KIS_ACCOUNT_NO")
    account_code: str = Field(default="01", alias="KIS_ACCOUNT_CODE")
    hts_id: str = Field(default="", alias="KIS_HTS_ID")
    server_mode: str = Field(default="vps", alias="KIS_SERVER_MODE")

    model_config = {"env_file": ".env", "extra": "ignore"}


class AppConfig(BaseSettings):
    host: str = Field(default="0.0.0.0", alias="APP_HOST")
    port: int = Field(default=8000, alias="APP_PORT")
    debug: bool = Field(default=False, alias="APP_DEBUG")
    db_path: str = Field(default="./data/stock.db", alias="DB_PATH")
    log_level: str = Field(default="INFO", alias="LOG_LEVEL")

    model_config = {"env_file": ".env", "extra": "ignore"}


class CollectorConfig:
    interval_seconds: int = 5
    market_open_hour: int = 9
    market_close_hour: int = 15
    market_close_minute: int = 30


class StrategyConfig:
    check_interval_seconds: int = 3
    max_daily_trades: int = 50
    default_order_type: str = "00"


class TradingConfig:
    max_order_amount: int = 10_000_000
    min_order_amount: int = 100_000
    slippage_percent: float = 0.1


class RateLimitConfig:
    requests_per_second: float = 1.0
    retry_delay: float = 1.5


class Settings:
    def __init__(self) -> None:
        self.kis = KISConfig()
        self.app = AppConfig()
        self.collector = CollectorConfig()
        self.strategy = StrategyConfig()
        self.trading = TradingConfig()
        self.rate_limit = RateLimitConfig()
        self._load_yaml()

    def _load_yaml(self) -> None:
        yaml_path = Path("config.yaml")
        if not yaml_path.exists():
            return

        with open(yaml_path, encoding="utf-8") as f:
            data: dict[str, Any] = yaml.safe_load(f) or {}

        kis = data.get("kis", {})
        if "server_mode" in kis:
            self.kis.server_mode = kis["server_mode"]
        rl = kis.get("rate_limit", {})
        if "requests_per_second" in rl:
            self.rate_limit.requests_per_second = rl["requests_per_second"]
        if "retry_delay" in rl:
            self.rate_limit.retry_delay = rl["retry_delay"]

        collector = data.get("collector", {})
        for key, val in collector.items():
            if hasattr(self.collector, key):
                setattr(self.collector, key, val)

        strategy = data.get("strategies", {})
        for key, val in strategy.items():
            if hasattr(self.strategy, key):
                setattr(self.strategy, key, val)

        trading = data.get("trading", {})
        for key, val in trading.items():
            if hasattr(self.trading, key):
                setattr(self.trading, key, val)

        logging_cfg = data.get("logging", {})
        if "level" in logging_cfg:
            self.app.log_level = logging_cfg["level"]


settings = Settings()


def get_base_url() -> str:
    if settings.kis.server_mode == "real":
        return "https://openapi.koreainvestment.com:9443"
    return "https://openapivts.koreainvestment.com:29443"


def get_ws_url() -> str:
    if settings.kis.server_mode == "real":
        return "ws://ops.koreainvestment.com:21000"
    return "ws://ops.koreainvestment.com:31000"