"""사이드바 설정 모듈.

API Key 인증 + 캠페인 선택 UI.
"""
import os

import requests
import streamlit as st

from core.api_client import ChainShiftClient


def render_sidebar() -> tuple[dict, int, str] | None:
    """사이드바 렌더링.

    Returns:
        (auth_info, campaign_id, campaign_display) 또는 None (인증 실패 시)
        auth_info = {"api_key": str}
    """
    with st.sidebar:
        st.header("설정")

        auth_info = _render_api_key_section()
        if not auth_info:
            return None

        st.divider()

        # 캠페인 선택
        result = _render_campaign_selector(auth_info)
        if not result:
            return None

        campaign_id, campaign_display = result
        return auth_info, campaign_id, campaign_display


def _render_api_key_section() -> dict | None:
    """API Key 인증 (env var 자동 인증 또는 직접 입력)."""
    env_api_key = os.environ.get("CHAINSHIFT_API_KEY", "")

    api_key = st.text_input(
        "API Key",
        type="password",
        placeholder="sk_live_xxx...",
        value=env_api_key,
        help="API Key 직접 입력 (환경변수 CHAINSHIFT_API_KEY 지원)",
        key="direct_api_key",
    )
    if not api_key:
        st.info("API Key를 입력하세요")
        return None

    return {
        "api_key": api_key,
        "access_token": None,
        "email": None,
    }


# =============================================================================
# Campaign selector
# =============================================================================


def _render_campaign_selector(auth_info: dict) -> tuple[int, str] | None:
    """캠페인 선택 드롭다운."""
    try:
        from core.data_fetchers import get_campaigns

        api_key = auth_info.get("api_key") or ""
        access_token = auth_info.get("access_token") or ""
        campaigns_response = get_campaigns(
            api_key=api_key, access_token=access_token
        )
        campaigns = campaigns_response.get("data", {}).get("items", [])

        if not campaigns:
            st.error("캠페인을 찾을 수 없습니다")
            return None

        # Sort campaigns by ID descending (latest first)
        campaigns_sorted = sorted(campaigns, key=lambda c: c.get("id", 0), reverse=True)

        def format_campaign(c):
            return f"{c['name']}  (#{c['id']})"

        st.markdown("**캠페인**")
        selected = st.selectbox(
            "캠페인 선택",
            options=campaigns_sorted,
            format_func=format_campaign,
            label_visibility="collapsed",
        )
        selected_campaign_id = selected["id"]
        selected_campaign_display = format_campaign(selected)

        st.caption(f"Campaign #{selected_campaign_id}")
        return selected_campaign_id, selected_campaign_display

    except requests.exceptions.ConnectionError:
        st.error("서버 연결에 실패했습니다. 잠시 후 다시 시도해주세요.")
        return None
    except requests.exceptions.Timeout:
        st.error("서버 응답 시간이 초과되었습니다. 잠시 후 다시 시도해주세요.")
        return None
    except Exception as e:
        st.error(f"API 오류: {str(e)}")
        return None