"""환경 변수 및 설정 관리."""

from __future__ import annotations

import os

from dotenv import load_dotenv

load_dotenv()


class Config:
    """앱 전체 설정을 담당하는 클래스."""

    # Slack
    slack_bot_token: str = os.getenv("SLACK_BOT_TOKEN", "")
    slack_app_token: str = os.getenv("SLACK_APP_TOKEN", "")
    allowed_user_id: str = os.getenv("SLACK_ALLOWED_USER_ID", "")
    allowed_channel_id: str = os.getenv("SLACK_ALLOWED_CHANNEL_ID", "")

    # PTY / tmux attach
    tmux_session_name: str = os.getenv("TMUX_SESSION_NAME", "claude")
    codex_tmux_session_name: str = os.getenv("CODEX_TMUX_SESSION_NAME", "codex")
    pty_read_timeout: int = int(os.getenv("PTY_READ_TIMEOUT", "5"))

    # Buffer
    output_buffer_interval: float = float(os.getenv("OUTPUT_BUFFER_INTERVAL", "2.0"))
    max_message_length: int = int(os.getenv("MAX_MESSAGE_LENGTH", "3000"))

    # Status reporting / reconnect
    reconnect_delay_seconds: float = float(os.getenv("RECONNECT_DELAY_SECONDS", "5.0"))
    output_idle_report_seconds: int = int(
        os.getenv("OUTPUT_IDLE_REPORT_SECONDS", "120")
    )
    input_idle_report_seconds: int = int(os.getenv("INPUT_IDLE_REPORT_SECONDS", "300"))

    def validate_required_settings(self) -> None:
        """필수 설정값 누락 여부를 검증한다."""
        missing: list[str] = []
        if not self.slack_bot_token:
            missing.append("SLACK_BOT_TOKEN")
        if not self.slack_app_token:
            missing.append("SLACK_APP_TOKEN")
        if not self.allowed_user_id:
            missing.append("SLACK_ALLOWED_USER_ID")
        if not self.allowed_channel_id:
            missing.append("SLACK_ALLOWED_CHANNEL_ID")

        if missing:
            joined = ", ".join(missing)
            raise ValueError(f"필수 환경 변수가 누락되었습니다: {joined}")