from __future__ import annotations

import logging
import pickle
import shutil
from pathlib import Path
from typing import Optional, TYPE_CHECKING, Any

import dcs.terrain.falklands.airports

import pydcs_extensions
from game.profiling import logged_duration
from pydcs_extensions import ELM2084_MMR_AD_RT, Iron_Dome_David_Sling_CP

if TYPE_CHECKING:
    from game import Game

_dcs_saved_game_folder: Optional[str] = None
_prefer_liberation_payloads: bool = False
_server_port: int = 16880


# fmt: off
class DummyObject:
    def __setstate__(self, state: dict[str, Any]) -> None:
        self.__dict__.update(state)


class MigrationUnpickler(pickle.Unpickler):
    """Custom unpickler to migrate campaign save-files for when components have been moved"""
    def find_class(self, module: Any, name: str) -> Any:
        if name == "NightMissions":
            from game.settings import NightMissions
            return NightMissions
        if name == "Conditions":
            from game.weather.conditions import Conditions
            return Conditions
        if name == "AtmosphericConditions":
            from game.weather.atmosphericconditions import AtmosphericConditions
            return AtmosphericConditions
        if name == "WindConditions":
            from game.weather.wind import WindConditions
            return WindConditions
        if name == "Clouds":
            from game.weather.clouds import Clouds
            return Clouds
        if name == "Fog":
            from game.weather.fog import Fog
            return Fog
        if name == "ClearSkies":
            from game.weather.weather import ClearSkies
            return ClearSkies
        if name == "Cloudy":
            from game.weather.weather import Cloudy
            return Cloudy
        if name == "Raining":
            from game.weather.weather import Raining
            return Raining
        if name == "Thunderstorm":
            from game.weather.weather import Thunderstorm
            return Thunderstorm
        if name == "Hipico":
            return dcs.terrain.falklands.airports.Hipico_Flying_Club
        if name in ["SaveManager", "SaveGameBundle"]:
            return DummyObject
        if name == "CaletaTortel":
            return dcs.terrain.falklands.airports.Caleta_Tortel_Airport
        if module == "pydcs_extensions.f4b.f4b":
            return pydcs_extensions.f4
        if module == "pydcs_extensions.irondome.irondome":
            if name in ["I9K57_URAGAN", "I9K51_GRAD", "I9K58_SMERCH"]:
                return None
            elif name == "ELM2048_MMR":
                return ELM2084_MMR_AD_RT
            elif name == "IRON_DOME_CP":
                return Iron_Dome_David_Sling_CP
        if module == "dcs.terrain.kola.airports":
            if name == "Lakselv":
                from dcs.terrain.kola.airports import Banak
                return Banak
            elif name == "Severomorsk1":
                from dcs.terrain.kola.airports import Severomorsk_1
                return Severomorsk_1
            elif name == "Severomorsk3":
                from dcs.terrain.kola.airports import Severomorsk_3
                return Severomorsk_3
            elif name == "Olenegorsk":
                from dcs.terrain.kola.airports import Olenya
                return Olenya
        if module in ["dcs.vehicles", "dcs.ships"]:
            try:
                return super().find_class(module, name)
            except AttributeError:
                alternate = name.split('.')[:-1] + [name.split('.')[-1][0].lower() + name.split('.')[-1][1:]]
                name = '.'.join(alternate)
        return super().find_class(module, name)
# fmt: on


def setup(user_folder: str, prefer_liberation_payloads: bool, port: int) -> None:
    global _dcs_saved_game_folder
    global _prefer_liberation_payloads
    global _server_port
    _dcs_saved_game_folder = user_folder
    _prefer_liberation_payloads = prefer_liberation_payloads
    _server_port = port
    if not save_dir().exists():
        save_dir().mkdir(parents=True)


def base_path() -> Path:
    global _dcs_saved_game_folder
    assert _dcs_saved_game_folder
    return Path(_dcs_saved_game_folder)


def debug_dir() -> Path:
    return base_path() / "Retribution" / "Debug"


def waypoint_debug_directory() -> Path:
    return debug_dir() / "Waypoints"


def settings_dir() -> Path:
    return base_path() / "Retribution" / "Settings"


def airwing_dir() -> Path:
    return base_path() / "Retribution" / "AirWing"


def kneeboards_dir() -> Path:
    return base_path() / "Retribution" / "Kneeboards"


def payloads_dir(backup: bool = False) -> Path:
    payloads = base_path() / "MissionEditor" / "UnitPayloads"
    if backup:
        return payloads / "_retribution_backups"
    return payloads


def prefer_liberation_payloads() -> bool:
    global _prefer_liberation_payloads
    return _prefer_liberation_payloads


def user_custom_weapon_injections_dir() -> Path:
    return base_path() / "Retribution" / "WeaponInjections"


def save_dir() -> Path:
    return base_path() / "Retribution" / "Saves"


def server_port() -> int:
    global _server_port
    return _server_port


def _temporary_save_file() -> str:
    return str(save_dir() / "tmpsave.retribution")


def _autosave_path() -> str:
    return str(save_dir() / "autosave.retribution")


def mission_path_for(name: str) -> Path:
    return base_path() / "Missions" / name


def load_game(path: str) -> Optional[Game]:
    with open(path, "rb") as f:
        try:
            save = MigrationUnpickler(f).load()
            save.savepath = path
            return save
        except Exception:
            logging.exception("Invalid Save game")
            return None


def save_game(game: Game) -> bool:
    with logged_duration("Saving game"):
        try:
            with open(_temporary_save_file(), "wb") as f:
                pickle.dump(game, f)
            shutil.copy(_temporary_save_file(), game.savepath)
            return True
        except Exception:
            logging.exception("Could not save game")
            return False


def autosave(game: Game) -> bool:
    """
    Autosave to the autosave location
    :param game: Game to save
    :return: True if saved successfully
    """
    try:
        with open(_autosave_path(), "wb") as f:
            pickle.dump(game, f)
        return True
    except Exception:
        logging.exception("Could not save game")
        return False