import logging
import sys
from enum import Enum
from functools import partial
from typing import Any, Dict, Union

import click

from .click_common import EnumType, LiteralParamType, command
from .device import Device, DeviceStatus  # noqa: F401
from .exceptions import DeviceException

if sys.version_info >= (3, 11):
    from enum import member

_LOGGER = logging.getLogger(__name__)


# partial is required here for str2bool, see https://stackoverflow.com/a/40339397
class MiotValueType(Enum):
    def _str2bool(x):
        """Helper to convert string to boolean."""
        return x.lower() in ("true", "1")

    Int = int
    Float = float

    if sys.version_info >= (3, 11):
        Bool = member(partial(_str2bool))
    else:
        Bool = partial(_str2bool)

    Str = str


MiotMapping = Dict[str, Dict[str, Any]]


class MiotDevice(Device):
    """Main class representing a MIoT device.

    The inheriting class should use the `_mappings` to set the `MiotMapping` keyed by
    the model names to inform which mapping is to be used for methods contained in this
    class. Defining the mappiong using `mapping` class variable is deprecated but
    remains in-place for backwards compatibility.
    """

    mapping: MiotMapping  # Deprecated, use _mappings instead
    _mappings: Dict[str, MiotMapping] = {}

    def __init__(
        self,
        ip: str = None,
        token: str = None,
        start_id: int = 0,
        debug: int = 0,
        lazy_discover: bool = True,
        timeout: int = None,
        *,
        model: str = None,
        mapping: MiotMapping = None,
    ):
        """Overloaded to accept keyword-only `mapping` parameter."""
        super().__init__(
            ip, token, start_id, debug, lazy_discover, timeout, model=model
        )

        if mapping is None and not hasattr(self, "mapping") and not self._mappings:
            _LOGGER.warning("Neither the class nor the parameter defines the mapping")

        if mapping is not None:
            self.mapping = mapping

    def get_properties_for_mapping(self, *, max_properties=15) -> list:
        """Retrieve raw properties based on mapping."""

        # We send property key in "did" because it's sent back via response and we can identify the property.
        mapping = self._get_mapping()
        properties = [{"did": k, **v} for k, v in mapping.items() if "aiid" not in v]

        return self.get_properties(
            properties, property_getter="get_properties", max_properties=max_properties
        )

    @command(
        click.argument("name", type=str),
        click.argument("params", type=LiteralParamType(), required=False),
    )
    def call_action(self, name: str, params=None):
        """Call an action by a name in the mapping."""
        mapping = self._get_mapping()
        if name not in mapping:
            raise DeviceException(f"Unable to find {name} in the mapping")

        action = mapping[name]

        if "siid" not in action or "aiid" not in action:
            raise DeviceException(f"{name} is not an action (missing siid or aiid)")

        return self.call_action_by(action["siid"], action["aiid"], params)

    @command(
        click.argument("siid", type=int),
        click.argument("aiid", type=int),
        click.argument("params", type=LiteralParamType(), required=False),
    )
    def call_action_by(self, siid, aiid, params=None):
        """Call an action."""
        if params is None:
            params = []
        payload = {
            "did": f"call-{siid}-{aiid}",
            "siid": siid,
            "aiid": aiid,
            "in": params,
        }

        return self.send("action", payload)

    @command(
        click.argument("siid", type=int),
        click.argument("piid", type=int),
    )
    def get_property_by(self, siid: int, piid: int):
        """Get a single property (siid/piid)."""
        return self.send(
            "get_properties", [{"did": f"{siid}-{piid}", "siid": siid, "piid": piid}]
        )

    @command(
        click.argument("siid", type=int),
        click.argument("piid", type=int),
        click.argument("value"),
        click.argument(
            "value_type", type=EnumType(MiotValueType), required=False, default=None
        ),
    )
    def set_property_by(
        self,
        siid: int,
        piid: int,
        value: Union[int, float, str, bool],
        value_type: Any = None,
    ):
        """Set a single property (siid/piid) to given value.

        value_type can be given to convert the value to wanted type, allowed types are:
        int, float, bool, str
        """
        if value_type is not None:
            value = value_type.value(value)

        return self.send(
            "set_properties",
            [{"did": f"set-{siid}-{piid}", "siid": siid, "piid": piid, "value": value}],
        )

    def set_property(self, property_key: str, value):
        """Sets property value using the existing mapping."""
        mapping = self._get_mapping()
        return self.send(
            "set_properties",
            [{"did": property_key, **mapping[property_key], "value": value}],
        )

    def _get_mapping(self) -> MiotMapping:
        """Return the protocol mapping to use.

        The logic is as follows:
        1. Use device model as key to lookup _mappings for the mapping
        2. If no match is found, but _mappings is defined, use the first item
        3. Fallback to class-defined `mapping` for backwards compat
        """
        if not self._mappings:
            return self.mapping
        mapping = self._mappings.get(self.model)
        if mapping is not None:
            return mapping

        first_model, first_mapping = list(self._mappings.items())[0]
        _LOGGER.warning(
            "Unable to find mapping for %s, falling back to %s", self.model, first_model
        )

        return first_mapping