from __future__ import annotations

from contextlib import suppress
from typing import TYPE_CHECKING, Any, Callable, Optional

from strawberry.subscriptions import GRAPHQL_WS_PROTOCOL
from strawberry.subscriptions.protocols.graphql_ws.handlers import BaseGraphQLWSHandler

if TYPE_CHECKING:
    from strawberry.channels.handlers.base import ChannelsWSConsumer
    from strawberry.schema import BaseSchema
    from strawberry.subscriptions.protocols.graphql_ws.types import OperationMessage


class GraphQLWSHandler(BaseGraphQLWSHandler):
    def __init__(
        self,
        schema: BaseSchema,
        debug: bool,
        keep_alive: bool,
        keep_alive_interval: float,
        get_context: Callable,
        get_root_value: Callable,
        ws: ChannelsWSConsumer,
    ) -> None:
        super().__init__(schema, debug, keep_alive, keep_alive_interval)
        self._get_context = get_context
        self._get_root_value = get_root_value
        self._ws = ws

    async def get_context(self) -> Any:
        return await self._get_context(
            request=self._ws, connection_params=self.connection_params
        )

    async def get_root_value(self) -> Any:
        return await self._get_root_value(request=self._ws)

    async def send_json(self, data: OperationMessage) -> None:
        await self._ws.send_json(data)

    async def close(self, code: int = 1000, reason: Optional[str] = None) -> None:
        # TODO: We are using `self._ws.base_send` directly instead of `self._ws.close`
        # because the latler doesn't accept the `reason` argument.
        await self._ws.base_send(
            {
                "type": "websocket.close",
                "code": code,
                "reason": reason or "",
            }
        )

    async def handle_request(self) -> Any:
        await self._ws.accept(subprotocol=GRAPHQL_WS_PROTOCOL)

    async def handle_disconnect(self, code: int) -> None:
        if self.keep_alive_task:
            self.keep_alive_task.cancel()
            with suppress(BaseException):
                await self.keep_alive_task

        for operation_id in list(self.subscriptions.keys()):
            await self.cleanup_operation(operation_id)

    async def handle_invalid_message(self, error_message: str) -> None:
        # This is not part of the BaseGraphQLWSHandler's interface, but the
        # channels integration is a high level wrapper that forwards this to
        # both us and the BaseGraphQLTransportWSHandler.
        await self.close(code=1002, reason=error_message)


__all__ = ["GraphQLWSHandler"]