from __future__ import annotations

from typing import AsyncIterator

from sdk.agent_api_wrapper import AgentApiWrapper
from sdk.interface import Attachment, MessageChunk, MessageResponse, PlatformClient, User, UserSettings
from sdk.prototype_state import PrototypeStateStore


class RealPlatformClient(PlatformClient):
    def __init__(
        self,
        agent_api: AgentApiWrapper,
        prototype_state: PrototypeStateStore,
        platform: str = "matrix",
    ) -> None:
        self._agent_api = agent_api
        self._prototype_state = prototype_state
        self._platform = platform

    @property
    def agent_api(self) -> AgentApiWrapper:
        return self._agent_api

    async def get_or_create_user(
        self,
        external_id: str,
        platform: str,
        display_name: str | None = None,
    ) -> User:
        return await self._prototype_state.get_or_create_user(
            external_id=external_id,
            platform=platform,
            display_name=display_name,
        )

    async def send_message(
        self,
        user_id: str,
        chat_id: str,
        text: str,
        attachments: list[Attachment] | None = None,
    ) -> MessageResponse:
        response_parts: list[str] = []
        tokens_used = 0
        message_id = user_id

        async for chunk in self.stream_message(user_id, chat_id, text, attachments=attachments):
            message_id = chunk.message_id
            if chunk.delta:
                response_parts.append(chunk.delta)
            if chunk.finished:
                tokens_used = chunk.tokens_used

        return MessageResponse(
            message_id=message_id,
            response="".join(response_parts),
            tokens_used=tokens_used,
            finished=True,
        )

    async def stream_message(
        self,
        user_id: str,
        chat_id: str,
        text: str,
        attachments: list[Attachment] | None = None,
    ) -> AsyncIterator[MessageChunk]:
        self._agent_api.last_tokens_used = 0
        async for event in self._agent_api.send_message(text):
            yield MessageChunk(
                message_id=user_id,
                delta=event.text,
                finished=False,
            )
        await self._prototype_state.set_last_tokens_used(user_id, self._agent_api.last_tokens_used)
        yield MessageChunk(
            message_id=user_id,
            delta="",
            finished=True,
            tokens_used=self._agent_api.last_tokens_used,
        )

    async def get_settings(self, user_id: str) -> UserSettings:
        return await self._prototype_state.get_settings(user_id)

    async def update_settings(self, user_id: str, action) -> None:
        await self._prototype_state.update_settings(user_id, action)