import importlib
import logging
import re
from datetime import datetime, timedelta
from pathlib import Path
from typing import Optional, Dict, Any, TYPE_CHECKING, List, TypeVar, overload, Callable

from pyhon import diagnose, exceptions
from pyhon.appliances.base import ApplianceBase
from pyhon.attributes import HonAttribute
from pyhon.command_loader import HonCommandLoader
from pyhon.commands import HonCommand
from pyhon.parameter.base import HonParameter
from pyhon.parameter.enum import HonParameterEnum
from pyhon.parameter.range import HonParameterRange
from pyhon.typedefs import Parameter

if TYPE_CHECKING:
    from pyhon import HonAPI

_LOGGER = logging.getLogger(__name__)

T = TypeVar("T")


# pylint: disable=too-many-public-methods,too-many-instance-attributes
class HonAppliance:
    _MINIMAL_UPDATE_INTERVAL = 5  # seconds

    def __init__(
        self, api: Optional["HonAPI"], info: Dict[str, Any], zone: int = 0
    ) -> None:
        if attributes := info.get("attributes"):
            info["attributes"] = {v["parName"]: v["parValue"] for v in attributes}
        self._info: Dict[str, Any] = info
        self._api: Optional[HonAPI] = api
        self._appliance_model: Dict[str, Any] = {}

        self._commands: Dict[str, HonCommand] = {}
        self._statistics: Dict[str, Any] = {}
        self._attributes: Dict[str, Any] = {}
        self._zone: int = zone
        self._additional_data: Dict[str, Any] = {}
        self._last_update: Optional[datetime] = None
        self._default_setting = HonParameter("", {}, "")
        self._notify_function: Optional[Callable[[Any], None]] = None

        try:
            self._extra: Optional[ApplianceBase] = importlib.import_module(
                f"pyhon.appliances.{self.appliance_type.lower()}"
            ).Appliance(self)
        except ModuleNotFoundError:
            self._extra = None

    def _get_nested_item(self, item: str) -> Any:
        result: List[Any] | Dict[str, Any] = self.data
        for key in item.split("."):
            if all(k in "0123456789" for k in key) and isinstance(result, list):
                result = result[int(key)]
            elif isinstance(result, dict):
                result = result[key]
        return result

    def __getitem__(self, item: str) -> Any:
        if self._zone:
            item += f"Z{self._zone}"
        if "." in item:
            return self._get_nested_item(item)
        if item in self.data:
            return self.data[item]
        if item in self.attributes["parameters"]:
            return self.attributes["parameters"][item].value
        return self.info[item]

    @overload
    def get(self, item: str, default: None = None) -> Any: ...

    @overload
    def get(self, item: str, default: T) -> T: ...

    def get(self, item: str, default: Optional[T] = None) -> Any:
        try:
            return self[item]
        except (KeyError, IndexError):
            return default

    def _check_name_zone(self, name: str, frontend: bool = True) -> str:
        zone = " Z" if frontend else "_z"
        attribute: str = self._info.get(name, "")
        if attribute and self._zone:
            return f"{attribute}{zone}{self._zone}"
        return attribute

    @property
    def appliance_model_id(self) -> str:
        return str(self._info.get("applianceModelId", ""))

    @property
    def appliance_type(self) -> str:
        return str(self._info.get("applianceTypeName", ""))

    @property
    def mac_address(self) -> str:
        return str(self.info.get("macAddress", ""))

    @property
    def unique_id(self) -> str:
        default_mac = "xx-xx-xx-xx-xx-xx"
        import_name = f"{self.appliance_type.lower()}_{self.appliance_model_id}"
        result = self._check_name_zone("macAddress", frontend=False)
        result = result.replace(default_mac, import_name)
        return result

    @property
    def model_name(self) -> str:
        return self._check_name_zone("modelName")

    @property
    def brand(self) -> str:
        brand = self._check_name_zone("brand")
        return brand[0].upper() + brand[1:]

    @property
    def nick_name(self) -> str:
        result = self._check_name_zone("nickName")
        if not result or re.findall("^[xX1\\s-]+$", result):
            return self.model_name
        return result

    @property
    def code(self) -> str:
        code: str = self.info.get("code", "")
        if code:
            return code
        serial_number: str = self.info.get("serialNumber", "")
        return serial_number[:8] if len(serial_number) < 18 else serial_number[:11]

    @property
    def model_id(self) -> int:
        return int(self._info.get("applianceModelId", 0))

    @property
    def options(self) -> Dict[str, Any]:
        return dict(self._appliance_model.get("options", {}))

    @property
    def commands(self) -> Dict[str, HonCommand]:
        return self._commands

    @property
    def attributes(self) -> Dict[str, Any]:
        return self._attributes

    @property
    def statistics(self) -> Dict[str, Any]:
        return self._statistics

    @property
    def info(self) -> Dict[str, Any]:
        return self._info

    @property
    def additional_data(self) -> Dict[str, Any]:
        return self._additional_data

    @property
    def zone(self) -> int:
        return self._zone

    @property
    def api(self) -> "HonAPI":
        """api connection object"""
        if self._api is None:
            raise exceptions.NoAuthenticationException("Missing hOn login")
        return self._api

    async def load_commands(self) -> None:
        command_loader = HonCommandLoader(self.api, self)
        await command_loader.load_commands()
        self._commands = command_loader.commands
        self._additional_data = command_loader.additional_data
        self._appliance_model = command_loader.appliance_data
        self.sync_params_to_command("settings")

    async def load_attributes(self) -> None:
        attributes = await self.api.load_attributes(self)
        for name, values in attributes.pop("shadow", {}).get("parameters", {}).items():
            if name in self._attributes.get("parameters", {}):
                self._attributes["parameters"][name].update(values)
            else:
                self._attributes.setdefault("parameters", {})[name] = HonAttribute(
                    values
                )
        self._attributes |= attributes
        if self._extra:
            self._attributes = self._extra.attributes(self._attributes)

    async def load_statistics(self) -> None:
        self._statistics = await self.api.load_statistics(self)
        self._statistics |= await self.api.load_maintenance(self)

    async def update(self, force: bool = False) -> None:
        now = datetime.now()
        min_age = now - timedelta(seconds=self._MINIMAL_UPDATE_INTERVAL)
        if force or not self._last_update or self._last_update < min_age:
            self._last_update = now
            await self.load_attributes()
            self.sync_params_to_command("settings")

    @property
    def command_parameters(self) -> Dict[str, Dict[str, str | float]]:
        return {n: c.parameter_value for n, c in self._commands.items()}

    @property
    def settings(self) -> Dict[str, Parameter]:
        result: Dict[str, Parameter] = {}
        for name, command in self._commands.items():
            for key in command.setting_keys:
                setting = command.settings.get(key, self._default_setting)
                result[f"{name}.{key}"] = setting
        if self._extra:
            return self._extra.settings(result)
        return result

    @property
    def available_settings(self) -> List[str]:
        result = []
        for name, command in self._commands.items():
            for key in command.setting_keys:
                result.append(f"{name}.{key}")
        return result

    @property
    def data(self) -> Dict[str, Any]:
        result = {
            "attributes": self.attributes,
            "appliance": self.info,
            "statistics": self.statistics,
            "additional_data": self._additional_data,
            **self.command_parameters,
            **self.attributes,
        }
        return result

    @property
    def diagnose(self) -> str:
        return diagnose.yaml_export(self, anonymous=True)

    async def data_archive(self, path: Path) -> str:
        return await diagnose.zip_archive(self, path, anonymous=True)

    def sync_command_to_params(self, command_name: str) -> None:
        if not (command := self.commands.get(command_name)):
            return
        for key in self.attributes.get("parameters", {}):
            if new := command.parameters.get(key):
                self.attributes["parameters"][key].update(
                    str(new.intern_value), shield=True
                )

    def sync_params_to_command(self, command_name: str) -> None:
        if not (command := self.commands.get(command_name)):
            return
        for key in command.setting_keys:
            if (
                new := self.attributes.get("parameters", {}).get(key)
            ) is None or new.value == "":
                continue
            setting = command.settings[key]
            try:
                if not isinstance(setting, HonParameterRange):
                    command.settings[key].value = str(new.value)
                else:
                    command.settings[key].value = float(new.value)
            except ValueError as error:
                _LOGGER.info("Can't set %s - %s", key, error)
                continue

    def sync_command(
        self,
        main: str,
        target: Optional[List[str] | str] = None,
        to_sync: Optional[List[str] | bool] = None,
    ) -> None:
        base: Optional[HonCommand] = self.commands.get(main)
        if not base:
            return
        for command, data in self.commands.items():
            if command == main or target and command not in target:
                continue

            for name, target_param in data.parameters.items():
                if not (base_param := base.parameters.get(name)):
                    continue
                if to_sync and (
                    (isinstance(to_sync, list) and name not in to_sync)
                    or not base_param.mandatory
                ):
                    continue
                self.sync_parameter(base_param, target_param)

    def sync_parameter(self, main: Parameter, target: Parameter) -> None:
        if isinstance(main, HonParameterRange) and isinstance(
            target, HonParameterRange
        ):
            target.max = main.max
            target.min = main.min
            target.step = main.step
        elif isinstance(target, HonParameterRange):
            target.max = int(main.value)
            target.min = int(main.value)
            target.step = 1
        elif isinstance(target, HonParameterEnum):
            target.values = main.values
        target.value = main.value

    def subscribe(self, notify_function: Callable[[Any], None]) -> None:
        self._notify_function = notify_function

    def notify(self) -> None:
        self.sync_params_to_command("settings")
        if self._notify_function:
            self._notify_function(self.attributes)