"""승인 카드가 권위 있는 경로이고 알림톡은 그 화면으로 보내는 편의 채널이다."""

import json
from config import social_config as config
from datetime import datetime, timezone
from pathlib import Path
from zoneinfo import ZoneInfo

import httpx
from sqlalchemy import update
from common.database.model.models import place_social_posts as Post, users, places
from crud import social_crud as db
from services.external import alimtalk

TEMPLATE = json.loads(
    (Path(__file__).parent / "resources/social_approval.json").read_text()
)


async def request_approval(post_id, user_id, token, path):
    from services.social_service import sha

    async def load(s):
        post = await s.get(Post, post_id)
        user = await s.get(users, user_id)
        place = await s.get(places, post.place_id)
        return getattr(user, "contact_number", None), place.name

    number, name = await db.transaction(load)
    if not alimtalk.is_configured() or not number:
        return
    # 야간 발송 정책이 미결이라 밤에는 화면 채널만 쓴다. 조용히 다음 날 자동 발송하지 않는다.
    if not 8 <= datetime.now(ZoneInfo("Asia/Seoul")).hour < 21:
        return
    origin = config.get("SOCIAL_APP_ORIGIN", "").rstrip("/")
    if not origin.startswith("https://"):
        error = "ALIMTALK_APP_ORIGIN_REQUIRED"
    else:
        try:
            async with httpx.AsyncClient(timeout=20) as client:
                await alimtalk.send(
                    number,
                    config.get("ALIMTALK_TEMPLATE_CODE", TEMPLATE["template_code"]),
                    dict(zip(TEMPLATE["variables"], [name, origin + path])),
                    client=client,
                )
            error = None
        except Exception:
            error = "ALIMTALK_SEND_FAILED"

    async def save(s):
        await s.execute(
            update(Post)
            .where(
                Post.post_id == post_id,
                Post.approval_token_sha == sha(token),
                Post.status == "PENDING_APPROVAL",
            )
            .values(
                last_error=error,
                approval_channel="screen" if error else "alimtalk",
                approval_sent_at=None if error else datetime.now(timezone.utc),
            )
        )

    await db.transaction(save)
    if error:
        # 발송 요청 자체가 실패했음을 호출자에게 알린다. 초안·화면 승인은 그대로 남는다.
        raise RuntimeError(error)