#!/usr/bin/env bash
# SPDX-FileCopyrightText: 2026 branderson
# SPDX-License-Identifier: GPL-3.0-or-later

#
# install.sh - install the Insta360 Link Joystick applet into Plasma.
#
# Usage:
#   ./install.sh               install, or upgrade if already present
#   ./install.sh --uninstall   remove it
#   ./install.sh --restart     also restart plasmashell (needed to pick up
#                              changes to an already-running applet)
#
# After installing: right-click the desktop or panel, Add Widgets, and search
# for "Insta360".

set -euo pipefail

readonly APPLET_ID="com.github.insta360linktools.joystick"
SCRIPT_DIR=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)
readonly SCRIPT_DIR
readonly PKG="$SCRIPT_DIR/package"

RESTART=0
MODE=install

die() { printf 'error: %s\n' "$*" >&2; exit 1; }

while [[ $# -gt 0 ]]; do
    case $1 in
        --uninstall) MODE=uninstall; shift ;;
        --restart)   RESTART=1; shift ;;
        -h|--help)
            awk 'NR>1 { if (!/^#/) exit; sub(/^# ?/, ""); print }' \
                "${BASH_SOURCE[0]}"
            exit 0 ;;
        *) die "unknown option: $1" ;;
    esac
done

if command -v kpackagetool6 >/dev/null 2>&1; then
    KPT=kpackagetool6
elif command -v kpackagetool5 >/dev/null 2>&1; then
    KPT=kpackagetool5
else
    die "neither kpackagetool6 nor kpackagetool5 found; is this a KDE Plasma session?"
fi

# Qt caches compiled QML and JS on disk. Replacing the applet's files does not
# invalidate that cache reliably, and a stale compiled logic.js missing a
# newer helper function is enough to break bindings that reference it. Clearing
# it costs only a slower first load.
clear_qml_cache() {
    local cleared=0 d
    for d in "${XDG_CACHE_HOME:-$HOME/.cache}"/plasmashell/qmlcache \
             "${XDG_CACHE_HOME:-$HOME/.cache}"/org.kde.plasmashell/qmlcache \
             "${XDG_CACHE_HOME:-$HOME/.cache}"/qmlcache; do
        if [[ -d $d ]]; then
            rm -rf -- "$d" && echo "  cleared $d" && cleared=1
        fi
    done
    (( cleared )) || echo "  no QML cache to clear"
}

restart_shell() {
    (( RESTART )) || return 0
    echo "Restarting plasmashell:"
    if systemctl --user restart plasma-plasmashell.service 2>/dev/null; then
        echo "  restarted via systemd"
    elif command -v kquitapp6 >/dev/null 2>&1; then
        kquitapp6 plasmashell 2>/dev/null || true
        sleep 2
        (setsid plasmashell >/dev/null 2>&1 &)
        echo "  restarted"
    else
        echo "  could not restart; log out and back in to pick up changes"
    fi
}

case $MODE in
install)
    [[ -f $PKG/metadata.json ]] || die "no package found at $PKG"
    # Fail early on malformed metadata rather than leaving a half-installed
    # applet that Plasma silently refuses to load.
    python3 -c "import json,sys; json.load(open('$PKG/metadata.json'))" \
        2>/dev/null || die "metadata.json is not valid JSON"

    if "$KPT" --type Plasma/Applet --list 2>/dev/null | grep -qx "$APPLET_ID"; then
        echo "Already installed; upgrading:"
        "$KPT" --type Plasma/Applet --upgrade "$PKG"
    else
        echo "Installing:"
        "$KPT" --type Plasma/Applet --install "$PKG"
    fi
    echo "Clearing the compiled QML cache:"
    clear_qml_cache
    restart_shell
    echo
    echo "Done. Right-click a panel or the desktop, Add Widgets, search 'Insta360'."
    ;;
uninstall)
    echo "Removing:"
    "$KPT" --type Plasma/Applet --remove "$APPLET_ID"
    restart_shell
    echo "Done."
    ;;
esac