import importlib
import json
import logging
from contextlib import suppress
from copy import copy
from datetime import datetime, timedelta
from pathlib import Path
from typing import Optional, Dict, Any
from typing import TYPE_CHECKING

from pyhon import helper
from pyhon.commands import HonCommand
from pyhon.parameter.base import HonParameter
from pyhon.parameter.fixed import HonParameterFixed
from pyhon.parameter.range import HonParameterRange

if TYPE_CHECKING:
    from pyhon import HonAPI

_LOGGER = logging.getLogger(__name__)


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 = info
        self._api: Optional[HonAPI] = api
        self._appliance_model: Dict = {}

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

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

    def __getitem__(self, item):
        if self._zone:
            item += f"Z{self._zone}"
        if "." in item:
            result = self.data
            for key in item.split("."):
                if all(k in "0123456789" for k in key) and isinstance(result, list):
                    result = result[int(key)]
                else:
                    result = result[key]
            return result
        if item in self.data:
            return self.data[item]
        if item in self.attributes["parameters"]:
            return self.attributes["parameters"].get(item)
        return self.info[item]

    def get(self, item, default=None):
        try:
            return self[item]
        except (KeyError, IndexError):
            return default

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

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

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

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

    @property
    def unique_id(self) -> str:
        return self._check_name_zone("macAddress", frontend=False)

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

    @property
    def nick_name(self) -> str:
        return self._check_name_zone("nickName")

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

    @property
    def options(self):
        return self._appliance_model.get("options", {})

    @property
    def commands(self):
        return self._commands

    @property
    def attributes(self):
        return self._attributes

    @property
    def statistics(self):
        return self._statistics

    @property
    def info(self):
        return self._info

    @property
    def additional_data(self):
        return self._additional_data

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

    @property
    def api(self) -> Optional["HonAPI"]:
        return self._api

    async def _recover_last_command_states(self):
        command_history = await self.api.command_history(self)
        for name, command in self._commands.items():
            last = next(
                (
                    index
                    for (index, d) in enumerate(command_history)
                    if d.get("command", {}).get("commandName") == name
                ),
                None,
            )
            if last is None:
                continue
            parameters = command_history[last].get("command", {}).get("parameters", {})
            if command.categories and (
                parameters.get("program") or parameters.get("category")
            ):
                if parameters.get("program"):
                    command.category = parameters.pop("program").split(".")[-1].lower()
                else:
                    command.category = parameters.pop("category")
                command = self.commands[name]
            for key, data in command.settings.items():
                if (
                    not isinstance(data, HonParameterFixed)
                    and parameters.get(key) is not None
                ):
                    with suppress(ValueError):
                        data.value = parameters.get(key)

    def _get_categories(self, command, data):
        categories = {}
        for category, value in data.items():
            result = self._get_command(value, command, category, categories)
            if result:
                if "PROGRAM" in category:
                    category = category.split(".")[-1].lower()
                categories[category] = result[0]
        if categories:
            if "setParameters" in categories:
                return [categories["setParameters"]]
            return [list(categories.values())[0]]
        return []

    def _get_commands(self, data):
        commands = []
        for command, value in data.items():
            commands += self._get_command(value, command, "")
        return {c.name: c for c in commands}

    def _get_command(self, data, command="", category="", categories=None):
        commands = []
        if isinstance(data, dict):
            if data.get("description") and data.get("protocolType", None):
                commands += [
                    HonCommand(
                        command,
                        data,
                        self,
                        category_name=category,
                        categories=categories,
                    )
                ]
            else:
                commands += self._get_categories(command, data)
        elif category:
            self._additional_data.setdefault(command, {})[category] = data
        else:
            self._additional_data[command] = data
        return commands

    async def load_commands(self):
        raw = await self.api.load_commands(self)
        self._appliance_model = raw.pop("applianceModel")
        raw.pop("dictionaryId", None)
        self._commands = self._get_commands(raw)
        await self._add_favourites()
        await self._recover_last_command_states()

    async def _add_favourites(self):
        favourites = await self._api.command_favourites(self)
        for favourite in favourites:
            name = favourite.get("favouriteName")
            command = favourite.get("command")
            command_name = command.get("commandName")
            program_name = command.get("programName", "").split(".")[-1].lower()
            base = copy(self._commands[command_name].categories[program_name])
            for data in command.values():
                if isinstance(data, str):
                    continue
                for key, value in data.items():
                    if parameter := base.parameters.get(key):
                        with suppress(ValueError):
                            parameter.value = value
            extra_param = HonParameterFixed("favourite", {"fixedValue": "1"}, "custom")
            base.parameters.update(favourite=extra_param)
            base.parameters["program"].set_value(name)
            self._commands[command_name].categories[name] = base

    async def load_attributes(self):
        self._attributes = await self.api.load_attributes(self)
        for name, values in self._attributes.pop("shadow").get("parameters").items():
            self._attributes.setdefault("parameters", {})[name] = values["parNewVal"]

    async def load_statistics(self):
        self._statistics = await self.api.load_statistics(self)
        self._statistics |= await self.api.load_maintenance(self)

    async def update(self):
        now = datetime.now()
        if not self._last_update or self._last_update < now - timedelta(
            seconds=self._MINIMAL_UPDATE_INTERVAL
        ):
            self._last_update = now
            await self.load_attributes()

    @property
    def command_parameters(self):
        return {n: c.parameter_value for n, c in self._commands.items()}

    @property
    def settings(self):
        result = {}
        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):
        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):
        result = {
            "attributes": self.attributes,
            "appliance": self.info,
            "statistics": self.statistics,
            "additional_data": self._additional_data,
            **self.command_parameters,
        }
        if self._extra:
            return self._extra.data(result)
        return result

    def diagnose(self, whitespace="  ", command_only=False):
        data = {
            "attributes": self.attributes.copy(),
            "appliance": self.info,
            "statistics": self.statistics,
            "additional_data": self._additional_data,
        }
        if self._extra and data.get("attributes"):
            data = self._extra.data(data)
        if command_only:
            data.pop("attributes")
            data.pop("appliance")
            data.pop("statistics")
        data |= {n: c.parameter_groups for n, c in self._commands.items()}
        extra = {n: c.data for n, c in self._commands.items() if c.data}
        if extra:
            data |= {"extra_command_data": extra}
        for sensible in ["PK", "SK", "serialNumber", "coords", "device"]:
            data.get("appliance", {}).pop(sensible, None)
        result = helper.pretty_print({"data": data}, whitespace=whitespace)
        result += helper.pretty_print(
            {
                "commands": helper.create_command(self.commands),
                "rules": helper.create_rules(self.commands),
            },
            whitespace=whitespace,
        )
        return result.replace(self.mac_address, "xx-xx-xx-xx-xx-xx")

    def sync_command(self, main, target=None) -> None:
        base: HonCommand = self.commands.get(main)
        for command, data in self.commands.items():
            if command == main or target and command not in target:
                continue
            for name, parameter in data.parameters.items():
                if base_value := base.parameters.get(name):
                    if isinstance(base_value, HonParameterRange) and isinstance(
                        parameter, HonParameterRange
                    ):
                        parameter.max = base_value.max
                        parameter.min = base_value.min
                        parameter.step = base_value.step
                    elif isinstance(parameter, HonParameterRange):
                        parameter.max = int(base_value.value)
                        parameter.min = int(base_value.value)
                        parameter.step = 1
                    parameter.value = base_value.value


class HonApplianceTest(HonAppliance):
    def __init__(self, name):
        super().__init__(None, {})
        self._name = name
        self.load_commands()
        self._info = self._appliance_model

    def load_commands(self):
        device = Path(__file__).parent / "test_data" / f"{self._name}.json"
        with open(str(device)) as f:
            raw = json.loads(f.read())
        self._appliance_model = raw.pop("applianceModel")
        raw.pop("dictionaryId", None)
        self._commands = self._get_commands(raw)

    async def update(self):
        return

    @property
    def nick_name(self) -> str:
        return self._name

    @property
    def unique_id(self) -> str:
        return self._name

    @property
    def mac_address(self) -> str:
        return "xx-xx-xx-xx-xx-xx"
