#!/bin/sh
# SPDX-License-Identifier: MIT
# enne2-cpufreq — installazione.
#
#   ./install.sh                 widget (utente) + backend privilegiato (sudo)
#   ./install.sh --widget        solo il plasmoide, come utente
#   ./install.sh --backend       solo helper + polkit, come root
#   ./install.sh --no-polkit-rule
#                                backend senza la regola "nessun prompt":
#                                ogni modifica chiederà la password
#   ./install.sh --dry-run       mostra cosa verrebbe fatto
set -u

PKG_DIR=$(cd "$(dirname "$0")" && pwd)
ID=org.enne2.cpufreq
LIBDIR=/usr/local/libexec/enne2-cpufreq
POLICY_DST=/usr/share/polkit-1/actions/org.enne2.cpufreq.set.policy
RULE_DST=/etc/polkit-1/rules.d/50-org.enne2.cpufreq.rules
STATEDIR=/var/lib/enne2-cpufreq

MODE=all
WITH_RULE=1
DRY=0

for arg in "$@"; do
    case "$arg" in
        --widget) MODE=widget ;;
        --backend) MODE=backend ;;
        --all) MODE=all ;;
        --no-polkit-rule) WITH_RULE=0 ;;
        --dry-run|-n) DRY=1 ;;
        -h|--help)
            sed -n 's/^# \{0,1\}//p' "$0" | sed -n '1,20p'
            exit 0
            ;;
        *) printf 'opzione sconosciuta: %s\n' "$arg" >&2; exit 2 ;;
    esac
done

say() { printf '%s\n' "$*"; }
run() {
    if [ "$DRY" -eq 1 ]; then
        printf '  [dry-run] %s\n' "$*"
    else
        "$@"
    fi
}

have_widget() {
    kpackagetool6 --type Plasma/Applet --show "$ID" >/dev/null 2>&1
}

install_widget() {
    command -v kpackagetool6 >/dev/null 2>&1 || {
        say "ERRORE: kpackagetool6 non trovato (pacchetto kpackagetool6/kf6-kpackage)."
        return 1
    }
    if [ "$DRY" -eq 1 ]; then
        say "[dry-run] kpackagetool6 --type Plasma/Applet --install|--upgrade $PKG_DIR"
    elif have_widget; then
        say "Aggiorno il plasmoide $ID…"
        kpackagetool6 --type Plasma/Applet --upgrade "$PKG_DIR" || return 1
    else
        say "Installo il plasmoide $ID…"
        kpackagetool6 --type Plasma/Applet --install "$PKG_DIR" || return 1
    fi

    WIDGET_DIR=$HOME/.local/share/plasma/plasmoids/$ID
    if [ "$DRY" -eq 0 ] && [ -d "$WIDGET_DIR/contents/scripts" ]; then
        chmod 0755 "$WIDGET_DIR"/contents/scripts/*.sh \
                   "$WIDGET_DIR"/contents/scripts/enne2-cpufreq-task 2>/dev/null
    fi

    # comodità da terminale: stesso launcher del widget
    if [ "$DRY" -eq 0 ] && [ -d "$HOME/.local/bin" ]; then
        ln -sfn "$WIDGET_DIR/contents/scripts/enne2-cpufreq-task" \
                "$HOME/.local/bin/enne2-cpufreq-task"
        say "Comando utente: ~/.local/bin/enne2-cpufreq-task (list|add|run|stop)"
    fi
    return 0
}

install_backend() {
    if [ "$(id -u)" -ne 0 ]; then
        say "ERRORE: la parte privilegiata richiede root (usare sudo)."
        return 1
    fi
    say "Backend privilegiato in $LIBDIR"
    run install -d -m 0755 -o root -g root "$LIBDIR"
    run install -d -m 0755 -o root -g root "$STATEDIR"
    run install -m 0755 -o root -g root "$PKG_DIR/bin/cpufreq-helper" "$LIBDIR/cpufreq-helper"
    run install -m 0644 -o root -g root "$PKG_DIR/contents/scripts/profiles.sh" "$LIBDIR/profiles.sh"

    say "Azione polkit: $POLICY_DST"
    run install -d -m 0755 /usr/share/polkit-1/actions
    run install -m 0644 -o root -g root \
        "$PKG_DIR/polkit/org.enne2.cpufreq.set.policy" "$POLICY_DST"

    if [ "$WITH_RULE" -eq 1 ]; then
        say "Regola polkit senza prompt (gruppo wheel, sessione attiva): $RULE_DST"
        run install -d -m 0755 /etc/polkit-1/rules.d
        run install -m 0644 -o root -g root \
            "$PKG_DIR/polkit/50-org.enne2.cpufreq.rules" "$RULE_DST"
    else
        say "Regola senza prompt NON installata: verrà chiesta la password a ogni modifica."
        run rm -f "$RULE_DST"
    fi

    # polkitd sorveglia le directory delle regole, il reload è solo una sicurezza
    if [ "$DRY" -eq 0 ]; then
        systemctl try-reload-or-restart polkit >/dev/null 2>&1 || true
    fi

    say ""
    say "Verifica:"
    if [ "$DRY" -eq 0 ]; then
        "$LIBDIR/cpufreq-helper" status | sed 's/^/  /'
    fi
    return 0
}

case "$MODE" in
    widget)
        install_widget
        ;;
    backend)
        install_backend
        ;;
    all)
        install_widget || exit 1
        say ""
        if [ "$(id -u)" -eq 0 ]; then
            install_backend || exit 1
        else
            say "Parte privilegiata: sudo $0 --backend $([ "$WITH_RULE" -eq 0 ] && echo --no-polkit-rule)"
            if [ "$DRY" -eq 1 ]; then
                sudo -n true >/dev/null 2>&1 && sudo "$0" --backend $([ "$WITH_RULE" -eq 0 ] && echo --no-polkit-rule) || say "[dry-run] sudo richiesto"
            else
                sudo "$0" --backend $([ "$WITH_RULE" -eq 0 ] && echo --no-polkit-rule) || exit 1
            fi
        fi
        ;;
esac

say ""
say "Fatto. Aggiungi il widget dal desktop (Aggiungi widget → «CPU Frequency Control»)"
say "oppure via script: desktops()[0].addWidget(\"$ID\")"