"""Default-sink volume via pactl — same tool scripts/getvol already shells out
to. Simple synchronous subprocess calls on click/scroll, no continuous polling:
the bar only needs to reflect what IT changed, and hardware volume keys are rare
enough on a device that also runs Hyprland that a poll loop isn't worth the cost.
"""

from __future__ import annotations

import re
import subprocess

_STEP = 5  # percent per scroll tick, matches typical bar/WM conventions

_VOL_RE = re.compile(r"(\d+)%")


def get_percent() -> int:
    try:
        out = subprocess.run(["pactl", "get-sink-volume", "@DEFAULT_SINK@"],
                             capture_output=True, text=True, timeout=1.0, check=True).stdout
        m = _VOL_RE.search(out)
        return int(m.group(1)) if m else 0
    except (subprocess.SubprocessError, OSError):
        return 0


def is_muted() -> bool:
    try:
        out = subprocess.run(["pactl", "get-sink-mute", "@DEFAULT_SINK@"],
                             capture_output=True, text=True, timeout=1.0, check=True).stdout
        return "yes" in out.lower()
    except (subprocess.SubprocessError, OSError):
        return False


def _set(percent: int) -> None:
    percent = max(0, min(100, percent))
    subprocess.Popen(["pactl", "set-sink-volume", "@DEFAULT_SINK@", f"{percent}%"],
                     stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)


def adjust(delta_ticks: int) -> None:
    """delta_ticks > 0 raises, < 0 lowers, in _STEP-sized increments."""
    _set(get_percent() + delta_ticks * _STEP)


def toggle_mute() -> None:
    subprocess.Popen(["pactl", "set-sink-mute", "@DEFAULT_SINK@", "toggle"],
                     stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)