"""Config flow for Plaato."""
from __future__ import annotations

from pyplaato.plaato import PlaatoDeviceType
import voluptuous as vol

from homeassistant import config_entries
from homeassistant.components import cloud, webhook
from homeassistant.config_entries import ConfigEntry
from homeassistant.const import CONF_SCAN_INTERVAL, CONF_TOKEN, CONF_WEBHOOK_ID
from homeassistant.core import callback
import homeassistant.helpers.config_validation as cv

from .const import (
    CONF_CLOUDHOOK,
    CONF_DEVICE_NAME,
    CONF_DEVICE_TYPE,
    CONF_USE_WEBHOOK,
    DEFAULT_SCAN_INTERVAL,
    DOCS_URL,
    DOMAIN,
    PLACEHOLDER_DEVICE_NAME,
    PLACEHOLDER_DEVICE_TYPE,
    PLACEHOLDER_DOCS_URL,
    PLACEHOLDER_WEBHOOK_URL,
)


class PlaatoConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
    """Handles a Plaato config flow."""

    VERSION = 1

    def __init__(self):
        """Initialize."""
        self._init_info = {}

    async def async_step_user(self, user_input=None):
        """Handle user step."""

        if user_input is not None:
            self._init_info[CONF_DEVICE_TYPE] = PlaatoDeviceType(
                user_input[CONF_DEVICE_TYPE]
            )
            self._init_info[CONF_DEVICE_NAME] = user_input[CONF_DEVICE_NAME]

            return await self.async_step_api_method()

        return self.async_show_form(
            step_id="user",
            data_schema=vol.Schema(
                {
                    vol.Required(
                        CONF_DEVICE_NAME,
                        default=self._init_info.get(CONF_DEVICE_NAME, None),
                    ): str,
                    vol.Required(
                        CONF_DEVICE_TYPE,
                        default=self._init_info.get(CONF_DEVICE_TYPE, None),
                    ): vol.In(list(PlaatoDeviceType)),
                }
            ),
        )

    async def async_step_api_method(self, user_input=None):
        """Handle device type step."""

        device_type = self._init_info[CONF_DEVICE_TYPE]

        if user_input is not None:
            token = user_input.get(CONF_TOKEN, None)
            use_webhook = user_input.get(CONF_USE_WEBHOOK, False)

            if not token and not use_webhook:
                errors = {"base": PlaatoConfigFlow._get_error(device_type)}
                return await self._show_api_method_form(device_type, errors)

            self._init_info[CONF_USE_WEBHOOK] = use_webhook
            self._init_info[CONF_TOKEN] = token
            return await self.async_step_webhook()

        return await self._show_api_method_form(device_type)

    async def async_step_webhook(self, user_input=None):
        """Validate config step."""

        use_webhook = self._init_info[CONF_USE_WEBHOOK]

        if use_webhook and user_input is None:
            try:
                webhook_id, webhook_url, cloudhook = await self._get_webhook_id()
            except cloud.CloudNotConnected:
                return self.async_abort(reason="cloud_not_connected")
            self._init_info[CONF_WEBHOOK_ID] = webhook_id
            self._init_info[CONF_CLOUDHOOK] = cloudhook

            return self.async_show_form(
                step_id="webhook",
                description_placeholders={
                    PLACEHOLDER_WEBHOOK_URL: webhook_url,
                    PLACEHOLDER_DOCS_URL: DOCS_URL,
                },
            )

        return await self._async_create_entry()

    async def _async_create_entry(self):
        """Create the entry step."""

        webhook_id = self._init_info.get(CONF_WEBHOOK_ID, None)
        auth_token = self._init_info[CONF_TOKEN]
        device_name = self._init_info[CONF_DEVICE_NAME]
        device_type = self._init_info[CONF_DEVICE_TYPE]

        unique_id = auth_token if auth_token else webhook_id

        await self.async_set_unique_id(unique_id)
        self._abort_if_unique_id_configured()

        return self.async_create_entry(
            title=device_type.name,
            data=self._init_info,
            description_placeholders={
                PLACEHOLDER_DEVICE_TYPE: device_type.name,
                PLACEHOLDER_DEVICE_NAME: device_name,
            },
        )

    async def _show_api_method_form(
        self, device_type: PlaatoDeviceType, errors: dict = None
    ):
        data_schema = vol.Schema({vol.Optional(CONF_TOKEN, default=""): str})

        if device_type == PlaatoDeviceType.Airlock:
            data_schema = data_schema.extend(
                {vol.Optional(CONF_USE_WEBHOOK, default=False): bool}
            )

        return self.async_show_form(
            step_id="api_method",
            data_schema=data_schema,
            errors=errors,
            description_placeholders={PLACEHOLDER_DEVICE_TYPE: device_type.name},
        )

    async def _get_webhook_id(self):
        """Generate webhook ID."""
        webhook_id = webhook.async_generate_id()
        if cloud.async_active_subscription(self.hass):
            webhook_url = await cloud.async_create_cloudhook(self.hass, webhook_id)
            cloudhook = True
        else:
            webhook_url = webhook.async_generate_url(self.hass, webhook_id)
            cloudhook = False

        return webhook_id, webhook_url, cloudhook

    @staticmethod
    def _get_error(device_type: PlaatoDeviceType):
        if device_type == PlaatoDeviceType.Airlock:
            return "no_api_method"
        return "no_auth_token"

    @staticmethod
    @callback
    def async_get_options_flow(config_entry: ConfigEntry) -> PlaatoOptionsFlowHandler:
        """Get the options flow for this handler."""
        return PlaatoOptionsFlowHandler(config_entry)


class PlaatoOptionsFlowHandler(config_entries.OptionsFlow):
    """Handle Plaato options."""

    def __init__(self, config_entry: ConfigEntry) -> None:
        """Initialize domain options flow."""
        super().__init__()

        self._config_entry = config_entry

    async def async_step_init(self, user_input=None):
        """Manage the options."""
        use_webhook = self._config_entry.data.get(CONF_USE_WEBHOOK, False)
        if use_webhook:
            return await self.async_step_webhook()

        return await self.async_step_user()

    async def async_step_user(self, user_input=None):
        """Manage the options."""
        if user_input is not None:
            return self.async_create_entry(title="", data=user_input)

        return self.async_show_form(
            step_id="user",
            data_schema=vol.Schema(
                {
                    vol.Optional(
                        CONF_SCAN_INTERVAL,
                        default=self._config_entry.options.get(
                            CONF_SCAN_INTERVAL, DEFAULT_SCAN_INTERVAL
                        ),
                    ): cv.positive_int
                }
            ),
        )

    async def async_step_webhook(self, user_input=None):
        """Manage the options for webhook device."""
        if user_input is not None:
            return self.async_create_entry(title="", data=user_input)

        webhook_id = self._config_entry.data.get(CONF_WEBHOOK_ID, None)
        webhook_url = (
            ""
            if webhook_id is None
            else webhook.async_generate_url(self.hass, webhook_id)
        )

        return self.async_show_form(
            step_id="webhook",
            description_placeholders={PLACEHOLDER_WEBHOOK_URL: webhook_url},
        )