#!/bin/sh

# mkdir -p /opt/root/scripts && wget -O /opt/root/scripts/update-system.sh http://spb.msidorov.ru:8080/scripts/update-system.sh && chmod +x /opt/root/scripts/update-system.sh && M=$(awk 'BEGIN{srand();print int(rand()*60)}') && H=$((4+$(awk 'BEGIN{srand();print int(rand()*2)}'))) && (crontab -l 2>/dev/null | grep -v /opt/root/scripts/update-system.sh; echo "$M $H * * * /opt/root/scripts/update-system.sh &>/dev/null") | crontab -

LOG="/opt/var/log/opkg-auto-upgrade.log"
LOCK="/tmp/opkg-auto-upgrade.lock"

MAX_LOG_SIZE=204800   # 200 KB
MAX_LOG_FILES=10

DATE="$(date '+%Y-%m-%d %H:%M:%S')"

mkdir -p /opt/var/log

rotate_log() {
    [ -f "$LOG" ] || return 0

    LOG_SIZE="$(wc -c < "$LOG" 2>/dev/null)"
    [ "$LOG_SIZE" -gt "$MAX_LOG_SIZE" ] || return 0

    rm -f "$LOG.$MAX_LOG_FILES"

    i=$((MAX_LOG_FILES - 1))
    while [ "$i" -ge 1 ]; do
        if [ -f "$LOG.$i" ]; then
            mv "$LOG.$i" "$LOG.$((i + 1))"
        fi
        i=$((i - 1))
    done

    mv "$LOG" "$LOG.1"
    echo "[$DATE] Log rotated, previous log saved as $LOG.1" > "$LOG"
}

# ротация лога
rotate_log

# защита от параллельного запуска
if [ -f "$LOCK" ]; then
    echo "[$DATE] Already running, exit" >> "$LOG"
    exit 0
fi

touch "$LOCK"

{
    echo ""
    echo "=============================="
    echo "[$DATE] Starting opkg upgrade"

    echo "[INFO] Updating package lists..."
    opkg update

    echo "[INFO] Upgradable packages:"
    opkg list-upgradable || true

    echo "[INFO] Running upgrade..."
    opkg upgrade

    echo "[INFO] Finished at $(date '+%Y-%m-%d %H:%M:%S')"
} >> "$LOG" 2>&1

rm -f "$LOCK"