"""Notify pusat about cycle close request / cancel."""

from __future__ import annotations

import logging
from typing import Any

import httpx
from django.conf import settings

from apps.farms.models import Cycle


logger = logging.getLogger(__name__)


class PusatCloseError(Exception):
    def __init__(self, message: str):
        self.message = message
        super().__init__(message)


def _active_site_id_for_cycle(cycle: Cycle) -> int | None:
    site = cycle.kandang.site
    if site.pusat_active_site_id is not None:
        return int(site.pusat_active_site_id)
    return None


def _configured(active_site_id: int | None) -> bool:
    return bool(settings.PUSAT_BASE_URL and settings.PUSAT_API_KEY and active_site_id)


def notify_pusat_close_request(cycle: Cycle, *, cancelled: bool = False) -> None:
    """POST ingest/cancel to pusat. Raises PusatCloseError on failure when configured."""
    active_site_id = _active_site_id_for_cycle(cycle)
    if not _configured(active_site_id):
        logger.info("Pusat close channel not configured; skipping notify for cycle %s", cycle.pk)
        return

    base = settings.PUSAT_BASE_URL.rstrip("/")
    headers = {"X-API-Key": settings.PUSAT_API_KEY, "Content-Type": "application/json"}

    try:
        if cancelled:
            url = f"{base}/cycle-close/cancel/"
            payload: dict[str, Any] = {
                "active_site_id": active_site_id,
                "source_cycle_id": cycle.pk,
            }
        else:
            url = f"{base}/cycle-close/ingest/"
            payload = {
                "active_site_id": active_site_id,
                "source_cycle_id": cycle.pk,
                "kandang_name": cycle.kandang.kandang_name,
                "site_name": cycle.kandang.site.site_name,
                "start_date": cycle.start_date.isoformat(),
                "proposed_end_date": cycle.proposed_end_date.isoformat()
                if cycle.proposed_end_date
                else None,
                "doc_in_weight": cycle.doc_in_weight,
                "doc_in_count": cycle.doc_in_count,
                "total_days": cycle.total_days,
                "requested_at": cycle.close_requested_at.isoformat()
                if cycle.close_requested_at
                else None,
            }
        with httpx.Client(timeout=30) as client:
            response = client.post(url, json=payload, headers=headers)
        if response.status_code >= 400:
            detail = response.text[:300]
            raise PusatCloseError(f"gagal kirim ke pusat — coba lagi ({response.status_code}: {detail})")
    except PusatCloseError:
        raise
    except httpx.HTTPError as exc:
        logger.exception("Pusat notify failed for cycle %s", cycle.pk)
        raise PusatCloseError("gagal kirim ke pusat — coba lagi") from exc