"""Config flow for Google Photos."""

from collections.abc import Mapping
import logging
from typing import Any

from google_photos_library_api.api import GooglePhotosLibraryApi
from google_photos_library_api.exceptions import GooglePhotosApiError

from homeassistant.config_entries import ConfigFlowResult
from homeassistant.const import CONF_ACCESS_TOKEN, CONF_TOKEN
from homeassistant.helpers import aiohttp_client, config_entry_oauth2_flow

from . import GooglePhotosConfigEntry, api
from .const import DOMAIN, OAUTH2_SCOPES


class OAuth2FlowHandler(
    config_entry_oauth2_flow.AbstractOAuth2FlowHandler, domain=DOMAIN
):
    """Config flow to handle Google Photos OAuth2 authentication."""

    DOMAIN = DOMAIN

    reauth_entry: GooglePhotosConfigEntry | None = None

    @property
    def logger(self) -> logging.Logger:
        """Return logger."""
        return logging.getLogger(__name__)

    @property
    def extra_authorize_data(self) -> dict[str, Any]:
        """Extra data that needs to be appended to the authorize url."""
        return {
            "scope": " ".join(OAUTH2_SCOPES),
            # Add params to ensure we get back a refresh token
            "access_type": "offline",
            "prompt": "consent",
        }

    async def async_oauth_create_entry(self, data: dict[str, Any]) -> ConfigFlowResult:
        """Create an entry for the flow."""
        session = aiohttp_client.async_get_clientsession(self.hass)
        auth = api.AsyncConfigFlowAuth(session, data[CONF_TOKEN][CONF_ACCESS_TOKEN])
        client = GooglePhotosLibraryApi(auth)

        try:
            user_resource_info = await client.get_user_info()
            await client.list_media_items(page_size=1)
        except GooglePhotosApiError as ex:
            return self.async_abort(
                reason="access_not_configured",
                description_placeholders={"message": str(ex)},
            )
        except Exception:
            self.logger.exception("Unknown error occurred")
            return self.async_abort(reason="unknown")
        user_id = user_resource_info.id

        if self.reauth_entry:
            if self.reauth_entry.unique_id == user_id:
                return self.async_update_reload_and_abort(
                    self.reauth_entry, unique_id=user_id, data=data
                )
            return self.async_abort(reason="wrong_account")

        await self.async_set_unique_id(user_id)
        self._abort_if_unique_id_configured()
        return self.async_create_entry(title=user_resource_info.name, data=data)

    async def async_step_reauth(
        self, entry_data: Mapping[str, Any]
    ) -> ConfigFlowResult:
        """Perform reauth upon an API authentication error."""
        self.reauth_entry = self.hass.config_entries.async_get_entry(
            self.context["entry_id"]
        )
        return await self.async_step_reauth_confirm()

    async def async_step_reauth_confirm(
        self, user_input: Mapping[str, Any] | None = None
    ) -> ConfigFlowResult:
        """Confirm reauth dialog."""
        if user_input is None:
            return self.async_show_form(step_id="reauth_confirm")
        return await self.async_step_user()