from asyncio import Event
from datetime import datetime, timedelta
from utils.lib import utc_now, strfdelta
from modules.profiles.profiles.profiles import ProfilesRegistry

from . import logger
from .data import SubathonData, Subathon, RunningSubathon, SubathonContribution, SubathonGoal

class ActiveSubathon:
    def __init__(self, subathondata: Subathon, runningdata: RunningSubathon | None):
        self.subathondata = subathondata
        self.runningdata = runningdata

    @property
    def running(self):
        return self.runningdata is not None

    @property
    def name(self):
        return self.subathondata.name or 'Subathon'

    async def check_cap(self):
        if not (cap := self.subathondata.timecap):
            return False
        else:
            score = await self.get_score()
            time_earned = self.get_score_time(score)
            total_time = self.subathondata.initial_time + time_earned
            return total_time >= cap

    async def check_finished(self):
        """
        Return True if the subathon duration has exceeded its earned time.
        """
        return (await self.get_duration() <= 0)

    async def pause(self):
        """
        Pause the active subathon.
        If the subathon is in 'overtime', i.e. it has already finished,
        then the total time is saved as the earned time not including the overtime.
        """
        if not self.running:
            raise ValueError("This subathon is not running!")
        assert self.runningdata is not None

        new_duration = await self.get_duration()

        await self.subathondata.update(duration=new_duration)
        await self.runningdata.delete()
        self.runningdata = None

    async def resume(self):
        if self.running:
            raise ValueError("This subathon is already running!")
        self.runningdata = await RunningSubathon.create(subathon_id=self.subathondata.subathon_id)

    async def get_score(self) -> float:
        rows = await SubathonContribution.fetch_where(subathon_id=self.subathondata.subathon_id)
        return sum(row.score for row in rows)

    def get_score_time(self, score: float) -> int:
        # Get time contributed by this score
        return int(score * self.subathondata.score_time)

    async def get_duration(self) -> int:
        """
        Number of seconds that this subathon has run for.
        Includes current running session if it exists.

        If the subathon is already finished (in overtime)
        returns the earned time instead of the true duration.
        """
        duration = self.subathondata.duration
        # Add running duration if required
        if self.runningdata:
            now = utc_now()
            added = int( (now - self.runningdata.last_started).total_seconds() )
            duration += added
        earned = await self.get_earned()

        return min(duration, earned)

    async def get_earned(self) -> int:
        """
        Number of seconds earned in the subathon so far.
        Includes initial time.
        Takes into account the cap.
        """
        score = await self.get_score()
        time_earned = self.get_score_time(score)
        total_time = self.subathondata.initial_time + time_earned
        if cap := self.subathondata.timecap:
            total_time = min(total_time, cap)
        return total_time

    async def get_remaining(self) -> int:
        """
        Number of seconds remaining on the subathon timer.
        Will be 0 or slightly negative if finished.
        """
        total_time = await self.get_earned()
        return total_time - await self.get_duration() - 1

    async def get_ending(self):
        """
        Ending time of the subathon.
        May be in the past if the subathon has already ended.
        """
        now = utc_now()
        remaining = await self.get_remaining()
        return now + timedelta(seconds=remaining)

    async def add_contribution(self, profileid: int | None, score: float, event_id: int | None) -> SubathonContribution:
        return await SubathonContribution.create(
            subathon_id=self.subathondata.subathon_id,
            profileid=profileid, score=score, event_id=event_id
        )

    def fetch_contributions(self, **kwargs):
        query = SubathonContribution.fetch_where(
            subathon_id=self.subathondata.subathon_id,
            **kwargs
        ).order_by('created_at')
        return query

    async def get_goals(self) -> list[SubathonGoal]:
        goals = await SubathonGoal.fetch_where(subathon_id=self.subathondata.subathon_id).order_by('required_score')
        return goals


class SubathonRegistry:
    def __init__(self, data: SubathonData, profiler: ProfilesRegistry):
        self.data = data
        self.profiler = profiler

    async def init(self):
        await self.data.init()

    async def get_active_subathon(self, communityid: int) -> ActiveSubathon | None:
        rows = await Subathon.fetch_where(communityid=communityid, ended_at=None)
        if rows:
            subathondata = rows[0]
            running = await RunningSubathon.fetch(subathondata.subathon_id)
            subba = ActiveSubathon(subathondata, running)
            return subba