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

set -euo pipefail
SPINNER_PID=""
SPINNER_ACTIVE=0
SPINNER_MSG=""
declare -A MSG_INFO_SHOWN

# ------------------------------------------------------------------------------
# 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
}

# ------------------------------------------------------------------------------
# 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")
}

# ------------------------------------------------------------------------------
# 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}"
  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}"
}

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

# ------------------------------------------------------------------------------
# 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
}

# ------------------------------------------------------------------------------
# Performs a curl request with retry logic and inline feedback.
# ------------------------------------------------------------------------------

run_curl() {
  if [ "$VERBOSE" = "no" ]; then
    $STD curl "$@"
  else
    curl "$@"
  fi
}

curl_handler() {
  set +e
  trap 'set -e' RETURN
  local args=()
  local url=""
  local max_retries=3
  local delay=2
  local attempt=1
  local exit_code
  local has_output_file=false
  local result=""

  # Parse arguments
  for arg in "$@"; do
    if [[ "$arg" != -* && -z "$url" ]]; then
      url="$arg"
    fi
    [[ "$arg" == "-o" || "$arg" == --output ]] && has_output_file=true
    args+=("$arg")
  done

  if [[ -z "$url" ]]; then
    msg_error "No valid URL or option entered for curl_handler"
    return 1
  fi

  $STD msg_info "Fetching: $url"

  while [[ $attempt -le $max_retries ]]; do
    if $has_output_file; then
      $STD run_curl "${args[@]}"
      exit_code=$?
    else
      result=$(run_curl "${args[@]}")
      exit_code=$?
    fi

    if [[ $exit_code -eq 0 ]]; then
      $STD msg_ok "Fetched: $url"
      $has_output_file || printf '%s' "$result"
      return 0
    fi

    if ((attempt >= max_retries)); then
      # Read error log if it exists
      if [ -s /tmp/curl_error.log ]; then
        local curl_stderr
        curl_stderr=$(</tmp/curl_error.log)
        rm -f /tmp/curl_error.log
      fi
      __curl_err_handler "$exit_code" "$url" "${curl_stderr:-}"
      exit
    fi

    $STD printf "\r\033[K${INFO}${YW}Retry $attempt/$max_retries in ${delay}s...${CL}" >&2
    sleep "$delay"
    ((attempt++))
  done
  set -e
}

# ------------------------------------------------------------------------------
# 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
}

### dev spinner ###
declare -A MSG_INFO_SHOWN=()
SPINNER_PID=""
SPINNER_ACTIVE=0
SPINNER_MSG=""

# Trap cleanup on various signals
trap 'cleanup_spinner' EXIT INT TERM HUP

spinner_frames=('⠋' '⠙' '⠹' '⠸' '⠼' '⠴' '⠦' '⠧' '⠇' '⠏')

# Ensure POSIX compatibility across Alpine and Debian/Ubuntu
# === Spinner Start ===
start_spinner() {
  local msg="$1"
  local spin_i=0
  local interval=0.1

  stop_spinner
  SPINNER_MSG="$msg"
  SPINNER_ACTIVE=1

  {
    while [ "$SPINNER_ACTIVE" -eq 1 ]; do
      if [ -t 2 ]; then
        printf "\r\e[2K%s %b" "${TAB}${spinner_frames[spin_i]}${TAB}" "${YW}${SPINNER_MSG}${CL}" >&2
      else
        printf "%s...\n" "$SPINNER_MSG" >&2
        break
      fi
      spin_i=$(((spin_i + 1) % ${#spinner_frames[@]}))
      sleep "$interval"
    done
  } &

  local pid=$!
  if kill -0 "$pid" 2>/dev/null; then
    SPINNER_PID="$pid"
    disown "$SPINNER_PID" 2>/dev/null || true
  else
    SPINNER_ACTIVE=0
    SPINNER_PID=""
  fi
}

# === Spinner Stop (No wait!) ===
stop_spinner() {
  if [ "$SPINNER_ACTIVE" -eq 1 ] && [ -n "$SPINNER_PID" ]; then
    SPINNER_ACTIVE=0
    if kill -0 "$SPINNER_PID" 2>/dev/null; then
      kill "$SPINNER_PID" 2>/dev/null || true
      for _ in $(seq 1 10); do
        kill -0 "$SPINNER_PID" 2>/dev/null || break
        sleep 0.05
      done
    fi
    printf "\r\e[2K" >&2
    SPINNER_PID=""
  fi
}

# === Cleanup Spinner on signals ===
cleanup_spinner() {
  stop_spinner
}

# === msg_info ===
msg_info() {
  local msg="$1"
  [ -z "$msg" ] && return
  if [ -n "${MSG_INFO_SHOWN["$msg"]+x}" ]; then return; fi
  MSG_INFO_SHOWN["$msg"]=1
  stop_spinner
  start_spinner "$msg"
}

# === msg_ok ===
msg_ok() {
  local msg="$1"
  [ -z "$msg" ] && return
  if [ "$SPINNER_ACTIVE" -eq 1 ]; then
    stop_spinner
  else
    printf "\r\e[2K" >&2
  fi
  printf "\r\e[2K%s %b\n" "$CM" "${GN}${msg}${CL}" >&2
  unset MSG_INFO_SHOWN["$msg"]
}

# === msg_error ===
msg_error() {
  local msg="$1"
  [ -z "$msg" ] && return
  stop_spinner
  printf "\r\e[2K%s %b\n" "$CROSS" "${RD}${msg}${CL}" >&2
}

# === msg_warn ===
msg_warn() {
  local msg="$1"
  [ -z "$msg" ] && return
  stop_spinner
  printf "\r\e[2K%s %b\n" "$INFO" "${YWB}${msg}${CL}" >&2
  unset MSG_INFO_SHOWN["$msg"]
}

# === msg_custom ===
msg_custom() {
  local symbol="$1"
  local color="$2"
  local msg="$3"
  [ -z "$msg" ] && return
  stop_spinner
  printf "\r\e[2K%s %b\n" "$symbol" "${color}${msg}${CL}" >&2
}

msg_progress() {
  local current="$1"
  local total="$2"
  local label="$3"
  local width=40
  local filled
  local percent
  local bar
  local empty
  local fill_char="#"
  local empty_char="-"

  # Sanitize and validate input
  if ! [[ "$current" =~ ^[0-9]+$ ]] || ! [[ "$total" =~ ^[0-9]+$ ]] || [ "$total" -eq 0 ]; then
    printf "\r\e[2K%s %b\n" "$CROSS" "${RD}Invalid progress input${CL}" >&2
    return
  fi

  percent=$(((current * 100) / total))
  filled=$(((current * width) / total))
  empty=$((width - filled))

  bar=$(printf "%${filled}s" | tr ' ' "$fill_char")
  bar+=$(printf "%${empty}s" | tr ' ' "$empty_char")

  # Print the progress line
  printf "\r\e[2K%s [%s] %3d%% %s" "${TAB}" "$bar" "$percent" "$label" >&2

  # Final newline when complete
  if [ "$current" -eq "$total" ]; then
    printf "\n" >&2
  fi
}

# # ------------------------------------------------------------------------------
# # Spinner trap: ensures spinner is stopped on termination signals.
# # ------------------------------------------------------------------------------
# trap 'stop_spinner' EXIT INT TERM HUP

# # ------------------------------------------------------------------------------
# # Starts a spinner animation for ongoing async operations.
# # ------------------------------------------------------------------------------
# start_spinner() {
#   local msg="$1"
#   local frames=(⠋ ⠙ ⠹ ⠸ ⠼ ⠴ ⠦ ⠧ ⠇ ⠏)
#   local spin_i=0
#   local interval=0.1

#   SPINNER_MSG="$msg"
#   printf "\r\e[2K" >&2

#   {
#     while [[ "$SPINNER_ACTIVE" -eq 1 ]]; do
#       printf "\r\e[2K%s %b" "${TAB}${frames[spin_i]}${TAB}" "${YW}${SPINNER_MSG}${CL}" >&2
#       spin_i=$(((spin_i + 1) % ${#frames[@]}))
#       sleep "$interval"
#     done
#   } &

#   SPINNER_PID=$!
#   disown "$SPINNER_PID"
# }

# # ------------------------------------------------------------------------------
# # Stops the spinner animation and resets its state.
# # ------------------------------------------------------------------------------
# stop_spinner() {
#   if [[ -n "${SPINNER_PID:-}" ]] && kill -0 "$SPINNER_PID" 2>/dev/null; then
#     kill "$SPINNER_PID" 2>/dev/null
#     sleep 0.1
#     kill -0 "$SPINNER_PID" 2>/dev/null && kill -9 "$SPINNER_PID" 2>/dev/null
#     wait "$SPINNER_PID" 2>/dev/null || true
#   fi
#   SPINNER_ACTIVE=0
#   unset SPINNER_PID
# }

# # ------------------------------------------------------------------------------
# # Stops the spinner if active, used to avoid multiple spinners.
# # ------------------------------------------------------------------------------
# spinner_guard() {
#   if [[ "$SPINNER_ACTIVE" -eq 1 ]] && [[ -n "${SPINNER_PID:-}" ]]; then
#     kill "$SPINNER_PID" 2>/dev/null
#     wait "$SPINNER_PID" 2>/dev/null || true
#     SPINNER_ACTIVE=0
#     unset SPINNER_PID
#   fi
# }

# # ------------------------------------------------------------------------------
# # Displays an informational spinner once per message.
# # ------------------------------------------------------------------------------
# msg_info() {
#   local msg="$1"
#   [[ -n "${MSG_INFO_SHOWN["$msg"]+x}" ]] && return
#   MSG_INFO_SHOWN["$msg"]=1

#   spinner_guard
#   SPINNER_ACTIVE=1
#   start_spinner "$msg"
# }

# # ------------------------------------------------------------------------------
# # Displays a success message and stops spinner.
# # ------------------------------------------------------------------------------
# msg_ok() {
#   local msg="$1"
#   stop_spinner
#   printf "\r\e[2K%s %b\n" "${CM}" "${GN}${msg}${CL}" >&2
#   unset MSG_INFO_SHOWN["$msg"]
# }

# # ------------------------------------------------------------------------------
# # Displays an error message and stops spinner.
# # ------------------------------------------------------------------------------
# msg_error() {
#   stop_spinner
#   local msg="$1"
#   printf "\r\e[2K%s %b\n" "${CROSS}" "${RD}${msg}${CL}" >&2
# }