"""Config flow to configure the PVOutput integration."""
from __future__ import annotations

from typing import Any

from pvo import PVOutput, PVOutputAuthenticationError, PVOutputError
import voluptuous as vol

from homeassistant.config_entries import ConfigFlow
from homeassistant.const import CONF_API_KEY, CONF_NAME
from homeassistant.core import HomeAssistant
from homeassistant.data_entry_flow import FlowResult
from homeassistant.helpers.aiohttp_client import async_get_clientsession

from .const import CONF_SYSTEM_ID, DOMAIN


async def validate_input(hass: HomeAssistant, *, api_key: str, system_id: int) -> None:
    """Try using the give system id & api key against the PVOutput API."""
    session = async_get_clientsession(hass)
    pvoutput = PVOutput(
        session=session,
        api_key=api_key,
        system_id=system_id,
    )
    await pvoutput.status()


class TailscaleFlowHandler(ConfigFlow, domain=DOMAIN):
    """Config flow for PVOutput."""

    VERSION = 1

    imported_name: str | None = None

    async def async_step_user(
        self, user_input: dict[str, Any] | None = None
    ) -> FlowResult:
        """Handle a flow initialized by the user."""
        errors = {}

        if user_input is not None:
            try:
                await validate_input(
                    self.hass,
                    api_key=user_input[CONF_API_KEY],
                    system_id=user_input[CONF_SYSTEM_ID],
                )
            except PVOutputAuthenticationError:
                errors["base"] = "invalid_auth"
            except PVOutputError:
                errors["base"] = "cannot_connect"
            else:
                await self.async_set_unique_id(str(user_input[CONF_SYSTEM_ID]))
                self._abort_if_unique_id_configured()
                return self.async_create_entry(
                    title=self.imported_name or str(user_input[CONF_SYSTEM_ID]),
                    data={
                        CONF_SYSTEM_ID: user_input[CONF_SYSTEM_ID],
                        CONF_API_KEY: user_input[CONF_API_KEY],
                    },
                )
        else:
            user_input = {}

        return self.async_show_form(
            step_id="user",
            description_placeholders={
                "account_url": "https://pvoutput.org/account.jsp"
            },
            data_schema=vol.Schema(
                {
                    vol.Required(
                        CONF_API_KEY, default=user_input.get(CONF_API_KEY, "")
                    ): str,
                    vol.Required(
                        CONF_SYSTEM_ID, default=user_input.get(CONF_SYSTEM_ID, "")
                    ): int,
                }
            ),
            errors=errors,
        )

    async def async_step_import(self, config: dict[str, Any]) -> FlowResult:
        """Handle a flow initialized by importing a config."""
        self.imported_name = config[CONF_NAME]
        return await self.async_step_user(
            user_input={
                CONF_SYSTEM_ID: config[CONF_SYSTEM_ID],
                CONF_API_KEY: config[CONF_API_KEY],
            }
        )