import asyncio
import hashlib
import hmac
import logging

import uvicorn

from yuxi.channel.extensions.webex.monitor import payload_to_unified_message
from yuxi.channel.extensions.webex.types import WebexAccount, WebexMessage
from yuxi.channel.extensions.webex.webhook import create_webhook_app
from yuxi.channel.message.models import MessageType, PeerInfo, UnifiedMessage
from yuxi.channel.routing.models import PeerKind

logger = logging.getLogger(__name__)


class WebexGateway:
    def __init__(self, account: WebexAccount, ctx, dedupe=None):
        self._account = account
        self._ctx = ctx
        self._api = None
        self._dedupe = dedupe
        self._bot_person_id: str = ""
        self._server_task: asyncio.Task | None = None
        self._running = False

    @property
    def api(self):
        return self._api

    @property
    def bot_person_id(self) -> str:
        return self._bot_person_id

    async def start(self) -> asyncio.Task:
        if self._running:
            raise RuntimeError("Webex gateway already running")

        from webexpythonsdk import WebexAPI

        self._api = WebexAPI(access_token=self._account.bot_access_token)
        self._running = True

        me = self._api.people.me()
        self._bot_person_id = me.id
        self._account.bot_person_id = me.id
        self._account.bot_person_email = me.emails[0] if me.emails else ""

        app = create_webhook_app(
            verify_signature=self._verify_signature,
            handle_webhook=self._handle_webhook,
            webhook_path=self._account.webhook_path,
        )

        config = uvicorn.Config(
            app,
            host=self._account.webhook_host,
            port=self._account.webhook_port,
            log_level="warning",
            access_log=False,
        )
        server = uvicorn.Server(config)
        self._server_task = asyncio.create_task(server.serve())

        await self._ensure_webhook_registered()

        return self._server_task

    async def stop(self):
        self._running = False
        if self._server_task:
            self._server_task.cancel()
            try:
                await self._server_task
            except asyncio.CancelledError:
                pass

    async def _ensure_webhook_registered(self):
        if not self._account.webhook_host or self._account.webhook_host == "0.0.0.0":
            logger.warning(
                "Webhook host is '%s'. Automatic webhook registration is disabled. "
                "To receive messages in development, set WEBEX_WEBHOOK_HOST to a public URL "
                "(e.g. via ngrok) or manually create a webhook at "
                "https://developer.webex.com/docs/webhooks.",
                self._account.webhook_host,
            )
            return

        target_url = f"https://{self._account.webhook_host}{self._account.webhook_path}"

        try:
            existing = list(self._api.webhooks.list())
        except Exception:
            return

        my_webhooks = [w for w in existing if w.targetUrl == target_url]

        if my_webhooks:
            for w in my_webhooks:
                if w.status != "active":
                    try:
                        self._api.webhooks.update(w.id, status="active")
                    except Exception:
                        pass
            self._register_additional_webhooks(existing, target_url)
            return

        try:
            self._api.webhooks.create(
                name="ForcePilot Webex Webhook",
                targetUrl=target_url,
                resource="messages",
                event="created",
                secret=self._account.webhook_secret,
            )
        except Exception:
            pass

        self._register_additional_webhooks([], target_url)

    def _register_additional_webhooks(self, existing: list, target_url: str):
        for resource, event, name_suffix in [
            ("attachmentActions", "created", "Attachment Actions"),
            ("messages", "deleted", "Message Deleted"),
            ("memberships", "created", "Membership Created"),
            ("memberships", "deleted", "Membership Deleted"),
            ("rooms", "created", "Room Created"),
            ("rooms", "updated", "Room Updated"),
        ]:
            try:
                already = [w for w in existing if w.resource == resource and w.event == event]
                if not already:
                    self._api.webhooks.create(
                        name=f"ForcePilot Webex {name_suffix}",
                        targetUrl=target_url,
                        resource=resource,
                        event=event,
                        secret=self._account.webhook_secret,
                    )
                    logger.info("Registered webhook: %s:%s", resource, event)
            except Exception:
                logger.debug("Failed to register webhook %s:%s", resource, event)

    def _verify_signature(self, body: bytes, x_spark_signature: str) -> bool:
        if not self._account.webhook_secret:
            return True

        computed = hmac.new(
            self._account.webhook_secret.encode(),
            body,
            hashlib.sha1,
        ).hexdigest()

        return hmac.compare_digest(computed, x_spark_signature)

    async def _handle_webhook(self, payload: dict) -> dict:
        resource = payload.get("resource", "")
        event_type = payload.get("event", "")

        if resource == "attachmentActions" and event_type == "created":
            return await self._handle_attachment_action(payload)

        if resource == "rooms":
            if event_type == "created":
                return await self._handle_room_created(payload)
            if event_type == "updated":
                return await self._handle_room_updated(payload)
            return {"status": "ignored", "reason": "event_not_relevant"}

        if resource == "memberships":
            if event_type == "created":
                return await self._handle_membership_created(payload)
            if event_type == "deleted":
                return await self._handle_membership_deleted(payload)
            return {"status": "ignored", "reason": "event_not_relevant"}

        if resource == "messages" and event_type == "deleted":
            return await self._handle_message_deleted(payload)

        if resource != "messages" or event_type != "created":
            return {"status": "ignored", "reason": "event_not_relevant"}

        data = payload.get("data", {})
        msg_id = data.get("id", "")
        person_id = data.get("personId", "")

        if person_id == self._bot_person_id:
            return {"status": "ignored", "reason": "echo"}

        if self._dedupe and self._dedupe.is_duplicate(msg_id):
            return {"status": "ignored", "reason": "duplicate"}

        webex_msg = WebexMessage(
            id=data.get("id", ""),
            room_id=data.get("roomId", ""),
            room_type=data.get("roomType", ""),
            person_id=data.get("personId", ""),
            person_email=data.get("personEmail", ""),
            text=data.get("text", ""),
            markdown=data.get("markdown", ""),
            html=data.get("html", ""),
            files=data.get("files", []),
            mentions=data.get("mentions", []),
            parent_id=data.get("parentId"),
            created=data.get("created", ""),
            raw=payload,
        )

        unified_msg = payload_to_unified_message(webex_msg, self._bot_person_id, self._account.account_id)

        if unified_msg and self._ctx.queue:
            self._ctx.queue.put_nowait(unified_msg)

        return {"status": "ok"}

    async def _handle_attachment_action(self, payload: dict) -> dict:
        data = payload.get("data", {})
        action_id = data.get("id", "")
        person_id = data.get("personId", "")

        if person_id == self._bot_person_id:
            return {"status": "ignored", "reason": "echo"}

        if self._dedupe and self._dedupe.is_duplicate(f"action:{action_id}"):
            return {"status": "ignored", "reason": "duplicate"}

        inputs = data.get("inputs", {})
        room_id = data.get("roomId", "")
        message_id = data.get("messageId", "")

        action_summary = ", ".join(f"{k}={v}" for k, v in inputs.items()) if inputs else "(no inputs)"
        content = f"[card_action:submit] inputs: {{{action_summary}}}"

        unified_msg = UnifiedMessage(
            msg_id=f"webex:action:{action_id}",
            channel_type="webex",
            account_id=self._account.account_id,
            content=content,
            sender=PeerInfo(
                kind=PeerKind.GROUP if data.get("roomType") != "direct" else PeerKind.DIRECT,
                id=person_id,
                display_name=data.get("personEmail", ""),
            ),
            message_type=MessageType.EVENT,
            metadata={
                "InteractionType": "attachment_action",
                "ActionType": data.get("type", "submit"),
                "Inputs": inputs,
                "room_id": room_id,
                "message_id": message_id,
                "debounce_key": f"webex:action:{person_id}:{room_id}",
            },
            raw_payload=payload,
        )

        if self._ctx.queue:
            self._ctx.queue.put_nowait(unified_msg)

        return {"status": "ok", "action": "attachment_action"}

    async def _handle_membership_created(self, payload: dict) -> dict:
        data = payload.get("data", {})
        person_id = data.get("personId", "")
        room_id = data.get("roomId", "")

        if person_id != self._bot_person_id:
            return {"status": "ignored", "reason": "not_self"}

        logger.info("Bot added to space: %s", room_id)
        return {"status": "ok", "action": "membership_created", "room_id": room_id}

    async def _handle_membership_deleted(self, payload: dict) -> dict:
        data = payload.get("data", {})
        person_id = data.get("personId", "")
        room_id = data.get("roomId", "")

        if person_id != self._bot_person_id:
            return {"status": "ignored", "reason": "not_self"}

        logger.info("Bot removed from space: %s", room_id)
        return {"status": "ok", "action": "membership_deleted", "room_id": room_id}

    async def _handle_message_deleted(self, payload: dict) -> dict:
        data = payload.get("data", {})
        msg_id = data.get("id", "")
        logger.info("Message deleted in Webex: %s", msg_id)
        return {"status": "ok", "action": "message_deleted", "message_id": msg_id}

    async def _handle_room_created(self, payload: dict) -> dict:
        data = payload.get("data", {})
        room_id = data.get("id", "")
        room_title = data.get("title", "")
        logger.info("Room created in Webex: %s (%s)", room_title, room_id)
        return {"status": "ok", "action": "room_created", "room_id": room_id}

    async def _handle_room_updated(self, payload: dict) -> dict:
        data = payload.get("data", {})
        room_id = data.get("id", "")
        room_title = data.get("title", "")
        logger.info("Room updated in Webex: %s (%s)", room_title, room_id)
        return {"status": "ok", "action": "room_updated", "room_id": room_id}