#!/bin/bash
# Helper script for CPU Control Plasma Widget
# Sets intel_pstate max_perf_pct with input validation
# Called via pkexec from the widget

SYSFS="/sys/devices/system/cpu/intel_pstate/max_perf_pct"

if [ -z "$1" ]; then
    echo "Usage: cpu-perf-set <10-100>" >&2
    exit 1
fi

if ! [[ "$1" =~ ^[0-9]+$ ]]; then
    echo "Error: value must be a number" >&2
    exit 1
fi

if [ "$1" -lt 10 ] || [ "$1" -gt 100 ]; then
    echo "Error: value must be between 10 and 100" >&2
    exit 1
fi

if [ ! -f "$SYSFS" ]; then
    echo "Error: intel_pstate not available" >&2
    exit 1
fi

echo "$1" > "$SYSFS"