import asyncio
import time
from datetime import datetime, timedelta

from graphgen.utils import logger


class RPM:
    def __init__(self, rpm: int = 1000):
        self.rpm = rpm
        self.record = {"rpm_slot": self.get_minute_slot(), "counter": 0}

    @staticmethod
    def get_minute_slot():
        current_time = time.time()
        dt_object = datetime.fromtimestamp(current_time)
        total_minutes_since_midnight = dt_object.hour * 60 + dt_object.minute
        return total_minutes_since_midnight

    async def wait(self, silent=False):
        current = time.time()
        dt_object = datetime.fromtimestamp(current)
        minute_slot = self.get_minute_slot()

        if self.record["rpm_slot"] == minute_slot:
            # check RPM exceed
            if self.record["counter"] >= self.rpm:
                # wait until next minute
                next_minute = dt_object.replace(second=0, microsecond=0) + timedelta(
                    minutes=1
                )
                _next = next_minute.timestamp()
                sleep_time = abs(_next - current)
                if not silent:
                    logger.info("RPM sleep %s", sleep_time)
                await asyncio.sleep(sleep_time)

                self.record = {"rpm_slot": self.get_minute_slot(), "counter": 0}
        else:
            self.record = {"rpm_slot": self.get_minute_slot(), "counter": 0}
        self.record["counter"] += 1

        if not silent:
            logger.debug(self.record)


class TPM:
    def __init__(self, tpm: int = 20000):
        self.tpm = tpm
        self.record = {"tpm_slot": self.get_minute_slot(), "counter": 0}

    @staticmethod
    def get_minute_slot():
        current_time = time.time()
        dt_object = datetime.fromtimestamp(current_time)
        total_minutes_since_midnight = dt_object.hour * 60 + dt_object.minute
        return total_minutes_since_midnight

    async def wait(self, token_count, silent=False):
        current = time.time()
        dt_object = datetime.fromtimestamp(current)
        minute_slot = self.get_minute_slot()

        # get next slot, skip
        if self.record["tpm_slot"] != minute_slot:
            self.record = {"tpm_slot": minute_slot, "counter": token_count}
            return

        # check RPM exceed
        old_counter = self.record["counter"]
        self.record["counter"] += token_count
        if self.record["counter"] > self.tpm:
            logger.info("Current TPM: %s, limit: %s", old_counter, self.tpm)
            # wait until next minute
            next_minute = dt_object.replace(second=0, microsecond=0) + timedelta(
                minutes=1
            )
            _next = next_minute.timestamp()
            sleep_time = abs(_next - current)
            logger.warning("TPM limit exceeded, wait %s seconds", sleep_time)
            await asyncio.sleep(sleep_time)

            self.record = {"tpm_slot": self.get_minute_slot(), "counter": token_count}

        if not silent:
            logger.debug(self.record)