import math

from PyQt6.QtWidgets import QScrollBar
import logging

log = logging.getLogger("scaledScrollBar")


class ScaledScrollBar(QScrollBar):
    is_huge = False

    def __init__(self):
        super(ScaledScrollBar, self).__init__()
        self.real_maximum = self.maximum()

    def setValue(self, value: int) -> None:
        if self.is_huge:
            real_position = value / self.real_maximum
            super().setValue(self.maximum() * real_position)
        else:
            super().setValue(value)

    def setMaximum(self, maximum: int) -> None:
        if maximum > 2 ** 31:
            new_maximum = 1000 * math.log2(maximum)
            super().setMaximum(new_maximum)
            self.real_maximum = maximum

            if not self.is_huge:
                old_position = self.value() / self.maximum()
                self.setValue(new_maximum * old_position)

            self.is_huge = True
        else:
            self.is_huge = False
            super().setMaximum(maximum)