# Copyright (c) 2021-2025 community-scripts ORG
# License: MIT | https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/LICENSE

# ------------------------------------------------------------------------------
# Loads core utility groups once (colors, formatting, icons, defaults).
# ------------------------------------------------------------------------------

[[ -n "${_CORE_FUNC_LOADED:-}" ]] && return
_CORE_FUNC_LOADED=1

load_functions() {
  [[ -n "${__FUNCTIONS_LOADED:-}" ]] && return
  __FUNCTIONS_LOADED=1
  color
  formatting
  icons
  default_vars
  set_std_mode
  # add more
}

# ============================================================================
# Error & Signal Handling – robust, universal, subshell-safe
# ============================================================================

_tool_error_hint() {
  local cmd="$1"
  local code="$2"
  case "$cmd" in
  curl)
    case "$code" in
    6) echo "Curl: Could not resolve host (DNS problem)" ;;
    7) echo "Curl: Failed to connect to host (connection refused)" ;;
    22) echo "Curl: HTTP error (404/403 etc)" ;;
    28) echo "Curl: Operation timeout" ;;
    *) echo "Curl: Unknown error ($code)" ;;
    esac
    ;;
  wget)
    echo "Wget failed – URL unreachable or permission denied"
    ;;
  systemctl)
    echo "Systemd unit failure – check service name and permissions"
    ;;
  jq)
    echo "jq parse error – malformed JSON or missing key"
    ;;
  mariadb | mysql)
    echo "MySQL/MariaDB command failed – check credentials or DB"
    ;;
  unzip)
    echo "unzip failed – corrupt file or missing permission"
    ;;
  tar)
    echo "tar failed – invalid format or missing binary"
    ;;
  node | npm | pnpm | yarn)
    echo "Node tool failed – check version compatibility or package.json"
    ;;
  *) echo "" ;;
  esac
}

catch_errors() {
  set -Eeuo pipefail
  trap 'error_handler $LINENO "$BASH_COMMAND"' ERR
}

# ------------------------------------------------------------------------------
# Sets ANSI color codes used for styled terminal output.
# ------------------------------------------------------------------------------
color() {
  YW=$(echo "\033[33m")
  YWB=$'\e[93m'
  BL=$(echo "\033[36m")
  RD=$(echo "\033[01;31m")
  BGN=$(echo "\033[4;92m")
  GN=$(echo "\033[1;92m")
  DGN=$(echo "\033[32m")
  CL=$(echo "\033[m")
}

# Special for spinner and colorized output via printf
color_spinner() {
  CS_YW=$'\033[33m'
  CS_YWB=$'\033[93m'
  CS_CL=$'\033[m'
}

# ------------------------------------------------------------------------------
# Defines formatting helpers like tab, bold, and line reset sequences.
# ------------------------------------------------------------------------------
formatting() {
  BFR="\\r\\033[K"
  BOLD=$(echo "\033[1m")
  HOLD=" "
  TAB="  "
  TAB3="      "
}

# ------------------------------------------------------------------------------
# Sets symbolic icons used throughout user feedback and prompts.
# ------------------------------------------------------------------------------
icons() {
  CM="${TAB}✔️${TAB}"
  CROSS="${TAB}✖️${TAB}"
  DNSOK="✔️ "
  DNSFAIL="${TAB}✖️${TAB}"
  INFO="${TAB}💡${TAB}${CL}"
  OS="${TAB}🖥️${TAB}${CL}"
  OSVERSION="${TAB}🌟${TAB}${CL}"
  CONTAINERTYPE="${TAB}📦${TAB}${CL}"
  DISKSIZE="${TAB}💾${TAB}${CL}"
  CPUCORE="${TAB}🧠${TAB}${CL}"
  RAMSIZE="${TAB}🛠️${TAB}${CL}"
  SEARCH="${TAB}🔍${TAB}${CL}"
  VERBOSE_CROPPED="🔍${TAB}"
  VERIFYPW="${TAB}🔐${TAB}${CL}"
  CONTAINERID="${TAB}🆔${TAB}${CL}"
  HOSTNAME="${TAB}🏠${TAB}${CL}"
  BRIDGE="${TAB}🌉${TAB}${CL}"
  NETWORK="${TAB}📡${TAB}${CL}"
  GATEWAY="${TAB}🌐${TAB}${CL}"
  DISABLEIPV6="${TAB}🚫${TAB}${CL}"
  DEFAULT="${TAB}⚙️${TAB}${CL}"
  MACADDRESS="${TAB}🔗${TAB}${CL}"
  VLANTAG="${TAB}🏷️${TAB}${CL}"
  ROOTSSH="${TAB}🔑${TAB}${CL}"
  CREATING="${TAB}🚀${TAB}${CL}"
  ADVANCED="${TAB}🧩${TAB}${CL}"
  FUSE="${TAB}🗂️${TAB}${CL}"
  HOURGLASS="${TAB}⏳${TAB}"

}

# ------------------------------------------------------------------------------
# Sets default retry and wait variables used for system actions.
# ------------------------------------------------------------------------------
default_vars() {
  RETRY_NUM=10
  RETRY_EVERY=3
  i=$RETRY_NUM
  #[[ "${VAR_OS:-}" == "unknown" ]]
}

# ------------------------------------------------------------------------------
# Sets default verbose mode for script and os execution.
# ------------------------------------------------------------------------------
set_std_mode() {
  if [ "${VERBOSE:-no}" = "yes" ]; then
    STD=""
  else
    STD="silent"
  fi
}

# Silent execution function
silent() {
  "$@" >/dev/null 2>&1
}

# Function to download & save header files
get_header() {
  local app_name=$(echo "${APP,,}" | tr -d ' ')
  local app_type=${APP_TYPE:-ct}
  local header_url="https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/${app_type}/headers/${app_name}"
  local local_header_path="/usr/local/community-scripts/headers/${app_type}/${app_name}"

  mkdir -p "$(dirname "$local_header_path")"

  if [ ! -s "$local_header_path" ]; then
    if ! curl -fsSL "$header_url" -o "$local_header_path"; then
      return 1
    fi
  fi

  cat "$local_header_path" 2>/dev/null || true
}

header_info() {
  local app_name=$(echo "${APP,,}" | tr -d ' ')
  local header_content

  header_content=$(get_header "$app_name") || header_content=""

  clear
  local term_width
  term_width=$(tput cols 2>/dev/null || echo 120)

  if [ -n "$header_content" ]; then
    echo "$header_content"
  fi
}

ensure_tput() {
  if ! command -v tput >/dev/null 2>&1; then
    if grep -qi 'alpine' /etc/os-release; then
      apk add --no-cache ncurses >/dev/null 2>&1
    elif command -v apt-get >/dev/null 2>&1; then
      apt-get update -qq >/dev/null
      apt-get install -y -qq ncurses-bin >/dev/null 2>&1
    fi
  fi
}

is_alpine() {
  local os_id="${var_os:-${PCT_OSTYPE:-}}"

  if [[ -z "$os_id" && -f /etc/os-release ]]; then
    os_id="$(
      . /etc/os-release 2>/dev/null
      echo "${ID:-}"
    )"
  fi

  [[ "$os_id" == "alpine" ]]
}

is_verbose_mode() {
  local verbose="${VERBOSE:-${var_verbose:-no}}"
  local tty_status
  if [[ -t 2 ]]; then
    tty_status="interactive"
  else
    tty_status="not-a-tty"
  fi
  [[ "$verbose" != "no" || ! -t 2 ]]
}

# ------------------------------------------------------------------------------
# Handles specific curl error codes and displays descriptive messages.
# ------------------------------------------------------------------------------
__curl_err_handler() {
  local exit_code="$1"
  local target="$2"
  local curl_msg="$3"

  case $exit_code in
  1) msg_error "Unsupported protocol: $target" ;;
  2) msg_error "Curl init failed: $target" ;;
  3) msg_error "Malformed URL: $target" ;;
  5) msg_error "Proxy resolution failed: $target" ;;
  6) msg_error "Host resolution failed: $target" ;;
  7) msg_error "Connection failed: $target" ;;
  9) msg_error "Access denied: $target" ;;
  18) msg_error "Partial file transfer: $target" ;;
  22) msg_error "HTTP error (e.g. 400/404): $target" ;;
  23) msg_error "Write error on local system: $target" ;;
  26) msg_error "Read error from local file: $target" ;;
  28) msg_error "Timeout: $target" ;;
  35) msg_error "SSL connect error: $target" ;;
  47) msg_error "Too many redirects: $target" ;;
  51) msg_error "SSL cert verify failed: $target" ;;
  52) msg_error "Empty server response: $target" ;;
  55) msg_error "Send error: $target" ;;
  56) msg_error "Receive error: $target" ;;
  60) msg_error "SSL CA not trusted: $target" ;;
  67) msg_error "Login denied by server: $target" ;;
  78) msg_error "Remote file not found (404): $target" ;;
  *) msg_error "Curl failed with code $exit_code: $target" ;;
  esac

  [[ -n "$curl_msg" ]] && printf "%s\n" "$curl_msg" >&2
  exit 1
}

fatal() {
  msg_error "$1"
  kill -INT $$
}

spinner() {
  local chars=(⠋ ⠙ ⠹ ⠸ ⠼ ⠴ ⠦ ⠧ ⠇ ⠏)
  local i=0
  while true; do
    local index=$((i++ % ${#chars[@]}))
    printf "\r\033[2K%s %b" "${CS_YWB}${chars[$index]}${CS_CL}" "${CS_YWB}${SPINNER_MSG:-}${CS_CL}"
    sleep 0.1
  done
}

clear_line() {
  tput cr 2>/dev/null || echo -en "\r"
  tput el 2>/dev/null || echo -en "\033[K"
}

stop_spinner() {
  local pid="${SPINNER_PID:-}"
  [[ -z "$pid" && -f /tmp/.spinner.pid ]] && pid=$(</tmp/.spinner.pid)

  if [[ -n "$pid" && "$pid" =~ ^[0-9]+$ ]]; then
    if kill "$pid" 2>/dev/null; then
      sleep 0.05
      kill -9 "$pid" 2>/dev/null || true
      wait "$pid" 2>/dev/null || true
    fi
    rm -f /tmp/.spinner.pid
  fi

  unset SPINNER_PID SPINNER_MSG
  stty sane 2>/dev/null || true
}

msg_info() {
  local msg="$1"
  [[ -z "$msg" ]] && return

  if ! declare -p MSG_INFO_SHOWN &>/dev/null || ! declare -A MSG_INFO_SHOWN &>/dev/null; then
    declare -gA MSG_INFO_SHOWN=()
  fi
  [[ -n "${MSG_INFO_SHOWN["$msg"]+x}" ]] && return
  MSG_INFO_SHOWN["$msg"]=1

  stop_spinner
  SPINNER_MSG="$msg"

  if is_verbose_mode || is_alpine; then
    local HOURGLASS="${TAB}⏳${TAB}"
    printf "\r\e[2K%s %b" "$HOURGLASS" "${YW}${msg}${CL}" >&2
    return
  fi

  color_spinner
  spinner &
  SPINNER_PID=$!
  echo "$SPINNER_PID" >/tmp/.spinner.pid
  disown "$SPINNER_PID" 2>/dev/null || true
}

msg_ok() {
  local msg="$1"
  [[ -z "$msg" ]] && return
  stop_spinner
  clear_line
  printf "%s %b\n" "$CM" "${GN}${msg}${CL}" >&2
  unset MSG_INFO_SHOWN["$msg"]
}

msg_error() {
  stop_spinner
  local msg="$1"
  echo -e "${BFR:-} ${CROSS:-✖️} ${RD}${msg}${CL}"
}

msg_warn() {
  stop_spinner
  local msg="$1"
  echo -e "${BFR:-} ${INFO:-ℹ️} ${YWB}${msg}${CL}"
}

msg_custom() {
  local symbol="${1:-"[*]"}"
  local color="${2:-"\e[36m"}"
  local msg="${3:-}"
  [[ -z "$msg" ]] && return
  stop_spinner
  echo -e "${BFR:-} ${symbol} ${color}${msg}${CL:-\e[0m}"
  printf "\r\033[K\e[?25h\n"
}

run_container_safe() {
  local ct="$1"
  shift
  local cmd="$*"

  lxc-attach -n "$ct" -- bash -euo pipefail -c "
    trap 'echo Aborted in container; exit 130' SIGINT SIGTERM
    $cmd
  " || __handle_general_error "lxc-attach to CT $ct"
}

check_or_create_swap() {
  msg_info "Checking for active swap"

  if swapon --noheadings --show | grep -q 'swap'; then
    msg_ok "Swap is active"
    return 0
  fi

  msg_error "No active swap detected"

  read -p "Do you want to create a swap file? [y/N]: " create_swap
  create_swap="${create_swap,,}" # to lowercase

  if [[ "$create_swap" != "y" && "$create_swap" != "yes" ]]; then
    msg_info "Skipping swap file creation"
    return 1
  fi

  read -p "Enter swap size in MB (e.g., 2048 for 2GB): " swap_size_mb
  if ! [[ "$swap_size_mb" =~ ^[0-9]+$ ]]; then
    msg_error "Invalid size input. Aborting."
    return 1
  fi

  local swap_file="/swapfile"

  msg_info "Creating ${swap_size_mb}MB swap file at $swap_file"
  if dd if=/dev/zero of="$swap_file" bs=1M count="$swap_size_mb" status=progress &&
    chmod 600 "$swap_file" &&
    mkswap "$swap_file" &&
    swapon "$swap_file"; then
    msg_ok "Swap file created and activated successfully"
  else
    msg_error "Failed to create or activate swap"
    return 1
  fi
}

trap 'stop_spinner' EXIT INT TERM