#!/bin/bash

INI_FILE="/boot/kioskbrowser.ini"

remount_root() {
    local mode=$1
    echo "Remounting root filesystem as $mode..."
    mount -o remount,"$mode" / || {
        echo "Failed to remount root as $mode"
        exit 1
    }
}

REBOOT_ENABLED=$(awk -F '=' '/^\[reboot\]/ { in_reboot=1; next }
                             in_reboot && /^\[/ { in_reboot=0 }
                             in_reboot && $1 ~ /enabled/ { gsub(/ /, "", $2); print $2 }' "$INI_FILE")

REBOOT_TIME=$(awk -F '=' '/^\[reboot\]/ { in_reboot=1; next }
                           in_reboot && /^\[/ { in_reboot=0 }
                           in_reboot && $1 ~ /reboot_time/ { gsub(/ /, "", $2); print $2 }' "$INI_FILE")

if [[ "$REBOOT_ENABLED" -eq 1 ]] && [[ "$REBOOT_TIME" =~ ^[0-2][0-9]:[0-5][0-9]$ ]]; then
    echo "Scheduling reboot for $REBOOT_TIME..."

    remount_root rw

    TARGET_TIME=$(date -d "$REBOOT_TIME" +%s)
    NOW=$(date +%s)

    if [ "$TARGET_TIME" -le "$NOW" ]; then
        TARGET_TIME=$(date -d "tomorrow $REBOOT_TIME" +%s)
    fi

    TARGET_ISO=$(date -d "@$TARGET_TIME" --iso-8601=seconds)

    REBOOT_UNIT="/etc/systemd/system/reboot-at.timer"
    cat <<EOF > "$REBOOT_UNIT"
[Unit]
Description=One-off reboot timer

[Timer]
OnCalendar=$TARGET_ISO
Persistent=false

[Install]
WantedBy=timers.target
EOF

    cat <<EOF > /etc/systemd/system/reboot-at.service
[Unit]
Description=Scheduled Reboot

[Service]
Type=oneshot
ExecStart=/sbin/reboot
EOF

    systemctl daemon-reload
    systemctl enable --now reboot-at.timer

    remount_root ro
else
    echo "Reboot not scheduled (disabled or invalid time)"
fi