#!/bin/sh
# SPDX-License-Identifier: MIT
# enne2-cpufreq — lettore di stato NON privilegiato per il plasmoide.
# Legge solo attributi world-readable di sysfs, /proc e hwmon; non scrive nulla.
# Uscita: righe key=value (formato usato dagli altri widget org.enne2.*).
set -u

SELF_DIR=$(dirname "$0")
if [ -r "$SELF_DIR/profiles.sh" ]; then
    # shellcheck source=profiles.sh
    . "$SELF_DIR/profiles.sh"
else
    printf 'helper=missing\nerror=profiles.sh mancante\n'
    exit 2
fi

CPUFREQ=/sys/devices/system/cpu/cpufreq
HELPER=/usr/local/libexec/enne2-cpufreq/cpufreq-helper
POLICY_POLKIT=/usr/share/polkit-1/actions/org.enne2.cpufreq.set.policy
RULE_POLKIT=/etc/polkit-1/rules.d/50-org.enne2.cpufreq.rules
CONF_DIR=${XDG_CONFIG_HOME:-$HOME/.config}/enne2-cpufreq
TASKS=$CONF_DIR/tasks.json
RUN=${XDG_RUNTIME_DIR:-/run/user/$(id -u)}/enne2-cpufreq

readf() {
    [ -r "$1" ] || return 1
    _val=
    IFS= read -r _val < "$1" 2>/dev/null || [ -n "$_val" ] || return 1
    printf '%s\n' "$_val"
}

policies() {
    for _p in "$CPUFREQ"/policy[0-9]*; do
        [ -d "$_p" ] && printf '%s\n' "$_p"
    done
}

attr_values() {
    for _p in $(policies); do
        readf "$_p/$1"
    done | sort -u | tr '\n' ' ' | sed 's/ *$//'
}

p0=$(policies | head -n 1)
if [ -z "$p0" ]; then
    printf 'helper=missing\nerror=nessuna policy cpufreq (driver non cpufreq?)\n'
    exit 2
fi

driver=$(readf "$p0/scaling_driver" || echo unknown)
hw_min=$(readf "$p0/cpuinfo_min_freq" || echo 0)
hw_max=$(cf_hw_max_khz "$p0")   # indipendente dallo stato del boost
floor=$(readf "$p0/amd_pstate_lowest_nonlinear_freq" || echo "")
[ -n "$floor" ] && [ "$floor" -gt "$hw_min" ] || floor=$hw_min
min_khz=$(readf "$p0/scaling_min_freq" || echo 0)
max_khz=$(readf "$p0/scaling_max_freq" || echo 0)
governor=$(attr_values scaling_governor)
governors=$(readf "$p0/scaling_available_governors" || echo "")
epp=$(attr_values energy_performance_preference)
epps=$(readf "$p0/energy_performance_available_preferences" || echo "")
epp_supported=0
[ -n "$epps" ] && epp_supported=1

# boost: per-policy (kernel recenti) → globale → intel_pstate/no_turbo invertito
boost=$(readf "$p0/boost" || readf "$CPUFREQ/boost" || echo "")
boost_supported=0
[ -n "$boost" ] && boost_supported=1
if [ "$boost_supported" -eq 0 ] && [ -r /sys/devices/system/cpu/intel_pstate/no_turbo ]; then
    _nt=$(readf /sys/devices/system/cpu/intel_pstate/no_turbo)
    [ "$_nt" = "1" ] && boost=0 || boost=1
    boost_supported=1
fi

# frequenza istantanea: massima fra le policy (core più attivo) e media
sum=0
cnt=0
curmax=0
for _p in $(policies); do
    _f=$(readf "$_p/scaling_cur_freq") || continue
    case "$_f" in ''|*[!0-9]*) continue ;; esac
    sum=$((sum + _f))
    cnt=$((cnt + 1))
    [ "$_f" -gt "$curmax" ] && curmax=$_f
done
[ "$cnt" -gt 0 ] || cnt=1
cur_avg=$((sum / cnt))

temp=$(readf /sys/class/hwmon/hwmon0/temp1_input 2>/dev/null || echo "")
for _h in /sys/class/hwmon/hwmon*; do
    [ -r "$_h/name" ] || continue
    case "$(readf "$_h/name")" in
        k10temp|coretemp|zenpower)
            temp=$(readf "$_h/temp1_input" || echo "")
            break
            ;;
    esac
done

model=$(sed -n 's/^model name[[:space:]]*: //p' /proc/cpuinfo | head -n 1)
load1=$(awk '{print $1}' /proc/loadavg)

helper_state=missing
[ -x "$HELPER" ] && helper_state=ok
polkit_state=missing
if [ -r "$POLICY_POLKIT" ] && [ -r "$RULE_POLKIT" ]; then
    polkit_state=ok
elif [ -r "$POLICY_POLKIT" ]; then
    polkit_state=ask
fi

conflicts=""
for _svc in tuned power-profiles-daemon tlp; do
    if systemctl is-active --quiet "$_svc" 2>/dev/null; then
        conflicts="$conflicts $_svc"
    fi
done
conflicts=${conflicts# }

profile=$(cf_detect_profile "${governor:-}" "${epp:-}" "${boost:-0}" "$max_khz" "$floor" "$hw_max")
printf 'driver=%s\n' "$driver"
printf 'mode=%s\n' "$(readf /sys/devices/system/cpu/amd_pstate/status || echo n/a)"
printf 'model=%s\n' "$model"
printf 'policies=%s\n' "$cnt"
printf 'governor=%s\n' "$governor"
printf 'governors=%s\n' "$governors"
printf 'epp=%s\n' "$epp"
printf 'epps=%s\n' "$epps"
printf 'epp_supported=%s\n' "$epp_supported"
printf 'boost=%s\n' "$boost"
printf 'boost_supported=%s\n' "$boost_supported"
printf 'hw_min_khz=%s\n' "$hw_min"
printf 'hw_max_khz=%s\n' "$hw_max"
printf 'floor_khz=%s\n' "$floor"
printf 'min_khz=%s\n' "$min_khz"
printf 'max_khz=%s\n' "$max_khz"
printf 'cur_khz=%s\n' "$curmax"
printf 'cur_avg_khz=%s\n' "$cur_avg"
printf 'temp_mdegc=%s\n' "$temp"
printf 'load1=%s\n' "$load1"
printf 'profile=%s\n' "$profile"
printf 'profile_label=%s\n' "$(cf_profile_label "$profile")"
printf 'helper=%s\n' "$helper_state"
printf 'polkit=%s\n' "$polkit_state"
printf 'conflicts=%s\n' "$conflicts"
[ -r /var/lib/enne2-cpufreq/baseline ] && printf 'baseline=present\n' || printf 'baseline=absent\n'

# ---- task configurati (un file JSON gestito da enne2-cpufreq-task) ----------
# Formato di ogni riga: task=<indice> <TAB> <running 0|1> <TAB> <oggetto JSON>
# Il JSON (jq -c, una riga) evita ogni ambiguità su spazi, tabulazioni e pipe
# dentro i comandi definiti dall'utente.
if command -v jq >/dev/null 2>&1 && [ -r "$TASKS" ]; then
    _count=$(jq -r '.tasks | length' "$TASKS" 2>/dev/null || echo 0)
    printf 'task_count=%s\n' "${_count:-0}"
    _i=0
    jq -c '.tasks[] | {name: .name, profile: .profile, command: .command, slug: .slug}' \
        "$TASKS" 2>/dev/null |
    while IFS= read -r _line; do
        [ -n "$_line" ] || continue
        _slug=$(printf '%s' "$_line" | jq -r '.slug // ""' 2>/dev/null)
        _running=0
        if [ -n "$_slug" ] && [ -r "$RUN/$_slug.pid" ]; then
            _pid=$(readf "$RUN/$_slug.pid")
            case "$_pid" in
                ''|*[!0-9]*) _running=0 ;;
                *) kill -0 "$_pid" 2>/dev/null && _running=1 ;;
            esac
        fi
        printf 'task=%s\t%s\t%s\n' "$_i" "$_running" "$_line"
        _i=$((_i + 1))
    done
else
    printf 'task_count=0\n'
fi

printf 'ts=%s\n' "$(date +%s)"