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

from collections.abc import Mapping
from typing import Any
from urllib.parse import urlparse

from aiohttp import CookieJar
from pybravia import BraviaTV, BraviaTVAuthError, BraviaTVError, BraviaTVNotSupported
import voluptuous as vol

from homeassistant import config_entries
from homeassistant.components import ssdp
from homeassistant.config_entries import ConfigEntry
from homeassistant.const import CONF_HOST, CONF_MAC, CONF_NAME, CONF_PIN
from homeassistant.core import callback
from homeassistant.data_entry_flow import FlowResult
from homeassistant.helpers import instance_id
from homeassistant.helpers.aiohttp_client import async_create_clientsession
import homeassistant.helpers.config_validation as cv
from homeassistant.util.network import is_host_valid

from . import BraviaTVCoordinator
from .const import (
    ATTR_CID,
    ATTR_MAC,
    ATTR_MODEL,
    CONF_CLIENT_ID,
    CONF_IGNORED_SOURCES,
    CONF_NICKNAME,
    CONF_USE_PSK,
    DOMAIN,
    NICKNAME_PREFIX,
)


class BraviaTVConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
    """Handle a config flow for Bravia TV integration."""

    VERSION = 1

    def __init__(self) -> None:
        """Initialize config flow."""
        self.client: BraviaTV | None = None
        self.device_config: dict[str, Any] = {}
        self.entry: ConfigEntry | None = None
        self.client_id: str = ""
        self.nickname: str = ""

    @staticmethod
    @callback
    def async_get_options_flow(config_entry: ConfigEntry) -> BraviaTVOptionsFlowHandler:
        """Bravia TV options callback."""
        return BraviaTVOptionsFlowHandler(config_entry)

    def create_client(self) -> None:
        """Create Bravia TV client from config."""
        host = self.device_config[CONF_HOST]
        session = async_create_clientsession(
            self.hass,
            cookie_jar=CookieJar(unsafe=True, quote_cookie=False),
        )
        self.client = BraviaTV(host=host, session=session)

    async def async_create_device(self) -> FlowResult:
        """Initialize and create Bravia TV device from config."""
        assert self.client

        pin = self.device_config[CONF_PIN]
        use_psk = self.device_config[CONF_USE_PSK]

        if use_psk:
            await self.client.connect(psk=pin)
        else:
            self.device_config[CONF_CLIENT_ID] = self.client_id
            self.device_config[CONF_NICKNAME] = self.nickname
            await self.client.connect(
                pin=pin, clientid=self.client_id, nickname=self.nickname
            )
        await self.client.set_wol_mode(True)

        system_info = await self.client.get_system_info()
        cid = system_info[ATTR_CID].lower()
        title = system_info[ATTR_MODEL]

        self.device_config[CONF_MAC] = system_info[ATTR_MAC]

        await self.async_set_unique_id(cid)
        self._abort_if_unique_id_configured()

        return self.async_create_entry(title=title, data=self.device_config)

    async def async_step_user(
        self, user_input: dict[str, Any] | None = None
    ) -> FlowResult:
        """Handle the initial step."""
        errors: dict[str, str] = {}

        if user_input is not None:
            host = user_input[CONF_HOST]
            if is_host_valid(host):
                self.device_config[CONF_HOST] = host
                self.create_client()
                return await self.async_step_authorize()

            errors[CONF_HOST] = "invalid_host"

        return self.async_show_form(
            step_id="user",
            data_schema=vol.Schema({vol.Required(CONF_HOST, default=""): str}),
            errors=errors,
        )

    async def async_step_authorize(
        self, user_input: dict[str, Any] | None = None
    ) -> FlowResult:
        """Authorize Bravia TV device."""
        errors: dict[str, str] = {}
        self.client_id, self.nickname = await self.gen_instance_ids()

        if user_input is not None:
            self.device_config[CONF_PIN] = user_input[CONF_PIN]
            self.device_config[CONF_USE_PSK] = user_input[CONF_USE_PSK]
            try:
                return await self.async_create_device()
            except BraviaTVAuthError:
                errors["base"] = "invalid_auth"
            except BraviaTVNotSupported:
                errors["base"] = "unsupported_model"
            except BraviaTVError:
                errors["base"] = "cannot_connect"

        assert self.client

        try:
            await self.client.pair(self.client_id, self.nickname)
        except BraviaTVError:
            return self.async_abort(reason="no_ip_control")

        return self.async_show_form(
            step_id="authorize",
            data_schema=vol.Schema(
                {
                    vol.Required(CONF_PIN, default=""): str,
                    vol.Required(CONF_USE_PSK, default=False): bool,
                }
            ),
            errors=errors,
        )

    async def async_step_ssdp(self, discovery_info: ssdp.SsdpServiceInfo) -> FlowResult:
        """Handle a discovered device."""
        parsed_url = urlparse(discovery_info.ssdp_location)
        host = parsed_url.hostname

        await self.async_set_unique_id(discovery_info.upnp[ssdp.ATTR_UPNP_UDN])
        self._abort_if_unique_id_configured(updates={CONF_HOST: host})
        self._async_abort_entries_match({CONF_HOST: host})

        scalarweb_info = discovery_info.upnp["X_ScalarWebAPI_DeviceInfo"]
        service_types = scalarweb_info["X_ScalarWebAPI_ServiceList"][
            "X_ScalarWebAPI_ServiceType"
        ]

        if "videoScreen" not in service_types:
            return self.async_abort(reason="not_bravia_device")

        model_name = discovery_info.upnp[ssdp.ATTR_UPNP_MODEL_NAME]
        friendly_name = discovery_info.upnp[ssdp.ATTR_UPNP_FRIENDLY_NAME]

        self.context["title_placeholders"] = {
            CONF_NAME: f"{model_name} ({friendly_name})",
            CONF_HOST: host,
        }

        self.device_config[CONF_HOST] = host
        return await self.async_step_confirm()

    async def async_step_confirm(
        self, user_input: dict[str, Any] | None = None
    ) -> FlowResult:
        """Allow the user to confirm adding the device."""
        if user_input is not None:
            self.create_client()
            return await self.async_step_authorize()

        return self.async_show_form(step_id="confirm")

    async def async_step_reauth(self, entry_data: Mapping[str, Any]) -> FlowResult:
        """Handle configuration by re-auth."""
        self.entry = self.hass.config_entries.async_get_entry(self.context["entry_id"])
        self.device_config = {**entry_data}
        return await self.async_step_reauth_confirm()

    async def async_step_reauth_confirm(
        self, user_input: dict[str, Any] | None = None
    ) -> FlowResult:
        """Dialog that informs the user that reauth is required."""
        self.create_client()
        client_id, nickname = await self.gen_instance_ids()

        assert self.client is not None
        assert self.entry is not None

        if user_input is not None:
            pin = user_input[CONF_PIN]
            use_psk = user_input[CONF_USE_PSK]
            try:
                if use_psk:
                    await self.client.connect(psk=pin)
                else:
                    self.device_config[CONF_CLIENT_ID] = client_id
                    self.device_config[CONF_NICKNAME] = nickname
                    await self.client.connect(
                        pin=pin, clientid=client_id, nickname=nickname
                    )
                await self.client.set_wol_mode(True)
            except BraviaTVError:
                return self.async_abort(reason="reauth_unsuccessful")
            else:
                self.hass.config_entries.async_update_entry(
                    self.entry, data={**self.device_config, **user_input}
                )
                await self.hass.config_entries.async_reload(self.entry.entry_id)
                return self.async_abort(reason="reauth_successful")

        try:
            await self.client.pair(client_id, nickname)
        except BraviaTVError:
            return self.async_abort(reason="reauth_unsuccessful")

        return self.async_show_form(
            step_id="reauth_confirm",
            data_schema=vol.Schema(
                {
                    vol.Required(CONF_PIN, default=""): str,
                    vol.Required(CONF_USE_PSK, default=False): bool,
                }
            ),
        )

    async def gen_instance_ids(self) -> tuple[str, str]:
        """Generate client_id and nickname."""
        uuid = await instance_id.async_get(self.hass)
        return uuid, f"{NICKNAME_PREFIX} {uuid[:6]}"


class BraviaTVOptionsFlowHandler(config_entries.OptionsFlow):
    """Config flow options for Bravia TV."""

    def __init__(self, config_entry: ConfigEntry) -> None:
        """Initialize Bravia TV options flow."""
        self.config_entry = config_entry
        self.ignored_sources = config_entry.options.get(CONF_IGNORED_SOURCES)
        self.source_list: list[str] = []

    async def async_step_init(
        self, user_input: dict[str, Any] | None = None
    ) -> FlowResult:
        """Manage the options."""
        coordinator: BraviaTVCoordinator = self.hass.data[DOMAIN][
            self.config_entry.entry_id
        ]

        await coordinator.async_update_sources()
        sources = coordinator.source_map.values()
        self.source_list = [item["title"] for item in sources]
        return await self.async_step_user()

    async def async_step_user(
        self, user_input: dict[str, Any] | None = None
    ) -> FlowResult:
        """Handle a flow initialized by the user."""
        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_IGNORED_SOURCES, default=self.ignored_sources
                    ): cv.multi_select(self.source_list)
                }
            ),
        )