from dataclasses import dataclass
import requests
from django.conf import settings
from django.core.exceptions import ImproperlyConfigured

@dataclass
class NotificationResult:
    success: bool
    provider_id: str = ""
    error: str = ""

class ConsoleBaleProvider:
    def send_message(self, chat_id, text):
        if settings.DEBUG: print(f"[DEV BALE] {chat_id or 'dashboard'}: {text}")
        return NotificationResult(True, "console")

class BaleBotProvider:
    def send_photo(self, chat_id, photo, caption='', *, token=None, filename='receipt.jpg', mime_type='image/jpeg'):
        """Upload private evidence bytes; do not expose a media URL or log a bot token."""
        token = settings.BALE_BOT_TOKEN if token is None else token
        if not token or not chat_id:
            return NotificationResult(False, error='توکن یا گروه بله تنظیم نشده است.')
        field, method = ('photo', 'sendPhoto') if mime_type in ('image/jpeg', 'image/png') else ('document', 'sendDocument')
        try:
            response = requests.post(f"{settings.BALE_API_BASE.rstrip('/')}/bot{token}/{method}",
                data={'chat_id': chat_id, 'caption': caption}, files={field: (filename, photo, mime_type)},
                timeout=settings.INTEGRATION_HTTP_TIMEOUT_SECONDS)
            if not response.ok:
                return NotificationResult(False, error=f'خطای HTTP بله: {response.status_code}')
            data = response.json()
            result = data.get('result') if isinstance(data, dict) else None
            if data.get('ok') is not True or not isinstance(result, dict) or not result.get('message_id'):
                return NotificationResult(False, error='بله ارسال تصویر را تأیید نکرد.')
            return NotificationResult(True, str(result['message_id']))
        except (requests.RequestException, ValueError, AttributeError) as error:
            return NotificationResult(False, error=f'خطا در ارتباط با بله ({type(error).__name__})')

    def send_message(self, chat_id, text):
        if not chat_id: return NotificationResult(False, error="Bale chat id is not configured")
        response = requests.post(f"{settings.BALE_API_BASE.rstrip('/')}/bot{settings.BALE_BOT_TOKEN}/sendMessage", json={"chat_id": chat_id, "text": text, "disable_web_page_preview": True}, timeout=settings.INTEGRATION_HTTP_TIMEOUT_SECONDS)
        response.raise_for_status(); data = response.json()
        if not data.get("ok", True): return NotificationResult(False, error=str(data.get("description", "Bale rejected message")))
        return NotificationResult(True, str((data.get("result") or {}).get("message_id", "bale")))

def get_bale_provider():
    if settings.BALE_BOT_TOKEN:
        return BaleBotProvider()
    if settings.DEBUG:
        return ConsoleBaleProvider()
    raise ImproperlyConfigured("BALE_BOT_TOKEN is required to deliver Bale notifications in production.")