import http.client
import json
import urllib.error
import urllib.request
import logging
from datetime import datetime, timedelta

from defence360agent.api.server import API
from defence360agent.contracts.config import ANTIVIRUS_MODE
from defence360agent.internals.iaid import (
    IndependentAgentIDAPI,
    IAIDTokenError,
)
from defence360agent.rpc_tools.utils import run_in_executor_decorator
from defence360agent.utils.support import parse_params

logger = logging.getLogger(__name__)

CACHE_TTL = timedelta(minutes=10)


NO_AGENT_TOKEN = "no_agent_token"


def _json_object(response):
    try:
        body = json.load(response)
    except (ValueError, OSError, http.client.HTTPException) as e:
        logger.warning("Cannot decode API response body: %s", e)
        return {}
    if isinstance(body, dict):
        return body
    logger.warning(
        "API response body is %s, not an object", type(body).__name__
    )
    return {}


class AnalystCleanupAPI(API):
    CLEANUP_ALLOWED_URL_TEMPLATE = (
        "{base}/api/analyst-assisted-cleanup/is-allowed"
    )
    SHOW_MANY_URL_TEMPLATE = "{base}/api/analyst-assisted-cleanup/tickets"
    IS_REGISTERED_URL_TEMPLATE = (
        "{base}/api/analyst-assisted-cleanup/is-registered"
    )
    CREATE_TICKET_URL_TEMPLATE = (
        "{base}/api/analyst-assisted-cleanup/create-ticket"
    )

    # Cache for the cleanup allowed check
    _cache = {
        "result": None,
        "timestamp": datetime.min,  # Initialize with minimum datetime
    }

    @classmethod
    async def check_cleanup_allowed(cls):
        """Check if analyst cleanup is allowed for this installation"""
        current_time = datetime.now()
        if (
            cls._cache["result"] is not None
            and current_time - cls._cache["timestamp"] < CACHE_TTL
        ):
            return cls._cache["result"]

        try:
            request = urllib.request.Request(
                cls.CLEANUP_ALLOWED_URL_TEMPLATE.format(base=cls._BASE_URL),
                headers={"X-Auth": await IndependentAgentIDAPI.get_token()},
                method="GET",
            )
        except IAIDTokenError:
            return False
        else:
            result = await cls._check_allowed(request)
            cls._cache["result"] = result
            cls._cache["timestamp"] = datetime.now()
            return result

    @classmethod
    @run_in_executor_decorator
    def _check_allowed(cls, request):
        """Execute the actual request in executor"""
        try:
            result = cls.request(request)
            return result.get("result", False)
        except Exception as e:
            logger.error("Failed to check cleanup permission: %s", e)
            # NOTE:
            # If the API returns an error, the request should be allowed
            # (to prevent extra sales trips due to API instability).
            # Ref: https://cloudlinux.slite.com/app/docs/Fhb2ASESxb9111
            return True

    @classmethod
    async def get_tickets(cls, ids: [str]) -> [dict]:
        """
        Retrieve tickets from Zendesk API using the show_many endpoint

        Args:
            ids (list or str): List of ticket IDs or comma-separated string of IDs

        Returns:
            list: List of dictionaries with 'id', 'status', and 'updated_at' fields
        """
        # Convert list of ids to comma-separated string if necessary
        if isinstance(ids, list):
            ids_str = ",".join(str(_id) for _id in ids)
        else:
            ids_str = str(ids)

        # Construct URL for the show_many endpoint
        url = cls.SHOW_MANY_URL_TEMPLATE.format(base=cls._BASE_URL)
        params = {"ids": ids_str}

        try:
            request = urllib.request.Request(
                parse_params(params, url),
                headers={"X-Auth": await IndependentAgentIDAPI.get_token()},
                method="GET",
            )
        except IAIDTokenError as e:
            logger.error(f"Failed to get IAID token for tickets: {e}")
            raise

        return await cls._execute_get_tickets(request)

    @classmethod
    @run_in_executor_decorator
    def _execute_get_tickets(cls, request):
        """Execute the actual get_tickets request in executor"""
        simplified_tickets = []
        try:
            result = cls.request(request)

            # Extract only the required fields from each ticket
            for ticket in result.get("tickets", []):
                simplified_tickets.append(
                    {
                        "id": ticket.get("id"),
                        "status": ticket.get("status"),
                        "updated_at": ticket.get("updated_at"),
                    }
                )

            return simplified_tickets
        except Exception as e:
            logger.error(f"Failed to get tickets: {e}")
        finally:
            return simplified_tickets

    @classmethod
    async def check_registered(cls, email):
        """Check if email is registered in Zendesk"""
        try:
            request = urllib.request.Request(
                cls.IS_REGISTERED_URL_TEMPLATE.format(base=cls._BASE_URL),
                headers={
                    "X-Auth": await IndependentAgentIDAPI.get_token(),
                    "Content-Type": "application/json",
                },
                data=json.dumps({"customer_email": email}).encode(),
                method="POST",
            )
        except IAIDTokenError:
            logger.error("Got IAIDTokenError")
            return {}
        else:
            result = await cls._register_status(request)
            return result

    @classmethod
    @run_in_executor_decorator
    def _register_status(cls, request):
        """Execute the actual request in executor"""
        try:
            result = cls.request(request)
            return result
        except Exception as e:
            logger.error("Failed to check email registration: %s", e)
            return {}

    @classmethod
    async def create_ticket(cls, email, subject, description):
        """Ask the backend to open a support ticket.

        Return an (HTTP status, response body) pair; the status is None when
        the backend could not be reached at all.
        """
        try:
            token = await IndependentAgentIDAPI.get_token()
        except IAIDTokenError:
            return None, {"message": NO_AGENT_TOKEN}

        request = urllib.request.Request(
            cls.CREATE_TICKET_URL_TEMPLATE.format(base=cls._BASE_URL),
            headers={
                "X-Auth": token,
                "Content-Type": "application/json",
            },
            data=json.dumps(
                {
                    "email": email,
                    "subject": subject,
                    "description": description,
                    "product": (
                        "pr_imunify_av" if ANTIVIRUS_MODE else "pr_im360"
                    ),
                }
            ).encode(),
            method="POST",
        )
        return await cls._send_create_ticket(request)

    @classmethod
    @run_in_executor_decorator
    def _send_create_ticket(cls, request):
        """Execute the actual request in executor"""
        try:
            with urllib.request.urlopen(
                request, timeout=cls._SOCKET_TIMEOUT
            ) as response:
                return response.status, _json_object(response)
        except urllib.error.HTTPError as e:
            return e.code, _json_object(e) if e.fp is not None else {}
        except Exception as e:
            logger.warning("Failed to reach create-ticket endpoint: %s", e)
            return None, {}