from __future__ import annotations

from dataclasses import dataclass
from typing import Any, Optional, TYPE_CHECKING, Type

from dcs.triggers import TriggerZone
from dcs.unittype import ShipType, StaticType, UnitType as DcsUnitType, VehicleType

from game.dcs.groundunittype import GroundUnitType
from game.dcs.shipunittype import ShipUnitType
from game.dcs.unittype import UnitType
from game.point_with_heading import PointWithHeading
from game.utils import Heading

if TYPE_CHECKING:
    from game.layout.layout import LayoutUnit
    from game.sim import GameUpdateEvents
    from game.theater import TheaterGroundObject


@dataclass
class TheaterUnit:
    """Representation of a single Unit in the Game"""

    # Every Unit has a unique ID generated from the game
    id: int
    # The name of the Unit. Not required to be unique
    name: str
    # DCS UniType of the unit
    type: Type[DcsUnitType]
    # Position and orientation of the Unit
    position: PointWithHeading
    # The parent ground object
    ground_object: TheaterGroundObject
    # State of the unit, dead or alive
    alive: bool = True

    @staticmethod
    def from_template(
        id: int, dcs_type: Type[DcsUnitType], t: LayoutUnit, go: TheaterGroundObject
    ) -> TheaterUnit:
        return TheaterUnit(
            id,
            t.name,
            dcs_type,
            PointWithHeading.from_point(t.position, Heading.from_degrees(t.heading)),
            go,
        )

    @property
    def unit_type(self) -> Optional[UnitType[Any]]:
        if issubclass(self.type, VehicleType):
            return next(GroundUnitType.for_dcs_type(self.type))
        elif issubclass(self.type, ShipType):
            return next(ShipUnitType.for_dcs_type(self.type))
        # None for not available StaticTypes
        return None

    def kill(self, events: GameUpdateEvents) -> None:
        self.alive = False
        events.update_tgo(self.ground_object)

    @property
    def unit_name(self) -> str:
        return f"{str(self.id).zfill(4)} | {self.name}"

    @property
    def display_name(self) -> str:
        dead_label = " [DEAD]" if not self.alive else ""
        unit_label = self.unit_type or self.type.name or self.name
        return f"{str(self.id).zfill(4)} | {unit_label}{dead_label}"

    @property
    def short_name(self) -> str:
        dead_label = " [DEAD]" if not self.alive else ""
        return f"<b>{self.type.id[0:18]}</b> {dead_label}"

    @property
    def is_static(self) -> bool:
        return issubclass(self.type, StaticType)

    @property
    def is_vehicle(self) -> bool:
        return issubclass(self.type, VehicleType)

    @property
    def is_ship(self) -> bool:
        return issubclass(self.type, ShipType)

    @property
    def icon(self) -> str:
        return self.type.id

    @property
    def repairable(self) -> bool:
        # Only let units with UnitType be repairable as we just have prices for them
        return self.unit_type is not None


class SceneryUnit(TheaterUnit):
    """Special TheaterUnit for handling scenery ground objects"""

    # Scenery Objects are identified by a special trigger zone
    zone: TriggerZone

    @property
    def display_name(self) -> str:
        dead_label = " [DEAD]" if not self.alive else ""
        return f"{str(self.id).zfill(4)} | {self.name}{dead_label}"

    @property
    def short_name(self) -> str:
        dead_label = " [DEAD]" if not self.alive else ""
        return f"<b>{self.name[0:18]}</b> {dead_label}"

    @property
    def icon(self) -> str:
        return "missing"

    @property
    def repairable(self) -> bool:
        return False


@dataclass
class TheaterGroup:
    """Logical group for multiple TheaterUnits at a specific position"""

    # Every Theater Group has a unique ID generated from the game
    id: int  # Unique ID
    # The name of the Group. Not required to be unique
    name: str
    # Position and orientation of the Group
    position: PointWithHeading
    # All TheaterUnits within the group
    units: list[TheaterUnit]
    # The parent ground object
    ground_object: TheaterGroundObject

    @staticmethod
    def from_template(
        id: int,
        name: str,
        units: list[TheaterUnit],
        go: TheaterGroundObject,
        unit_type: Type[DcsUnitType],
        unit_count: int,
    ) -> TheaterGroup:
        return TheaterGroup(
            id,
            name,
            PointWithHeading.from_point(go.position, go.heading),
            units,
            go,
        )

    @property
    def group_name(self) -> str:
        return f"{str(self.id).zfill(4)} | {self.name}"

    @property
    def unit_count(self) -> int:
        return len(self.units)

    @property
    def alive_units(self) -> int:
        return sum([unit.alive for unit in self.units])