import json
from datetime import datetime, timedelta
from typing import Literal, Optional

from redbot.core.bot import Red

from ..utilities.utils import timedelta_from_string
from .base import AuroraBaseModel
from .partials import PartialUser


class Change(AuroraBaseModel):
    type: Literal["ORIGINAL", "RESOLVE", "EDIT"]
    timestamp: datetime
    user_id: int
    reason: Optional[str] = "No reason provided"
    duration: Optional[timedelta] = None
    end_timestamp: Optional[datetime] = None

    @property
    def unix_timestamp(self) -> int:
        return int(self.timestamp.timestamp())

    def __str__(self):
        return f"{self.type} {self.user_id} {self.reason}"

    async def get_user(self) -> "PartialUser":
        return await PartialUser.from_id(self.bot, self.user_id)

    @classmethod
    def from_dict(cls, bot: Red, data: dict) -> "Change":
        if isinstance(data, str):
            data = json.loads(data)
        if "duration" in data and data["duration"] and not isinstance(data["duration"], timedelta) and not data["duration"] == "NULL":
            duration = timedelta_from_string(data["duration"])
        elif "duration" in data and isinstance(data["duration"], timedelta):
            duration = data["duration"]
        else:
            duration = None

        if "end_timestamp" in data and data["end_timestamp"] and not isinstance(data["end_timestamp"], datetime):
            end_timestamp = datetime.fromtimestamp(data["end_timestamp"])
        elif "end_timestamp" in data and isinstance(data["end_timestamp"], datetime):
            end_timestamp = data["end_timestamp"]
        else:
            end_timestamp = None

        if not isinstance(data["timestamp"], datetime):
            timestamp = datetime.fromtimestamp(data["timestamp"])
        else:
            timestamp = data["timestamp"]

        try:
            data["user_id"] = int(data["user_id"])
        except ValueError:
            data["user_id"] = 0

        data.update({
            "timestamp": timestamp,
            "end_timestamp": end_timestamp,
            "duration": duration
        })
        return cls(bot=bot, **data)