#!/usr/bin/env bash
# MAX25-Stack-Lite — semi-automatic setup wizard (dialog / whiptail)
# Detects serial + audio devices, writes max25d.ini (+ crdop.ini for CRDOP path).
set -euo pipefail

ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
UI_TITLE="MAX25-Stack-Lite setup"
UI_BACKTITLE="MAX25-Stack-Lite | local packet-radio setup"
UI_WIDTH=72
UI_HEIGHT=18
TMP_FILES=()

UI=""
if command -v whiptail >/dev/null 2>&1; then
  UI=whiptail
elif command -v dialog >/dev/null 2>&1; then
  UI=dialog
else
  echo "max25-lite-setup: install whiptail or dialog, then run this command again." >&2
  exit 1
fi

cleanup() {
  local file
  for file in "${TMP_FILES[@]}"; do
    rm -f -- "$file"
  done
}
trap cleanup EXIT HUP INT TERM

require_terminal_size() {
  local columns lines
  [[ -t 1 && -t 2 ]] || return 0
  columns="$(tput cols 2>/dev/null || true)"
  lines="$(tput lines 2>/dev/null || true)"
  if [[ "$columns" =~ ^[0-9]+$ && "$lines" =~ ^[0-9]+$ ]] \
    && ((columns < UI_WIDTH || lines < UI_HEIGHT)); then
    printf '%s\n' \
      "max25-lite-setup: terminal is ${columns}x${lines}; need at least ${UI_WIDTH}x${UI_HEIGHT}." \
      "Resize the terminal and run max25-lite-setup again." >&2
    exit 1
  fi
}

show_help() {
  "$UI" --backtitle "$UI_BACKTITLE" --title "Setup help" --ok-label "Back" \
    --msgbox "Use Up/Down to move, Space to mark a radio-list choice, and Enter to continue.

Cancel or Esc stops the wizard without writing configuration files.

The wizard writes local-only configuration. It does not start the modem, key a radio, or transmit.

For serial and BayCom/based paths, select the device connected to this computer. For CRDOP, select the local capture/playback device." \
    "$UI_HEIGHT" "$UI_WIDTH"
}

msgbox() {
  "$UI" --backtitle "$UI_BACKTITLE" --title "$UI_TITLE" --ok-label "Continue" \
    --msgbox "$1" 14 "$UI_WIDTH"
}

yesno() {
  local prompt="$1" rc
  while :; do
    if "$UI" --backtitle "$UI_BACKTITLE" --title "$UI_TITLE" \
      --yes-label "Yes" --no-label "No" --help-button --help-label "Help" \
      --yesno "$prompt" 10 "$UI_WIDTH"; then
      return 0
    else
      rc=$?
    fi
    if [[ "$rc" -eq 2 ]]; then
      show_help
      continue
    fi
    return "$rc"
  done
}

inputbox() {
  local prompt="$1" default="${2:-}" value rc
  while :; do
    if value=$("$UI" --backtitle "$UI_BACKTITLE" --title "$UI_TITLE" \
      --ok-label "Continue" --cancel-label "Cancel" --help-button --help-label "Help" \
      --inputbox "$prompt" 10 "$UI_WIDTH" "$default" 3>&1 1>&2 2>&3); then
      printf '%s\n' "$value"
      return 0
    else
      rc=$?
    fi
    if [[ "$rc" -eq 2 ]]; then
      show_help
      continue
    fi
    return "$rc"
  done
}

menu() {
  local prompt="$1" value rc
  shift
  while :; do
    if value=$("$UI" --backtitle "$UI_BACKTITLE" --title "$UI_TITLE" \
      --ok-label "Continue" --cancel-label "Cancel" --help-button --help-label "Help" \
      --menu "$prompt" "$UI_HEIGHT" "$UI_WIDTH" 10 "$@" 3>&1 1>&2 2>&3); then
      printf '%s\n' "$value"
      return 0
    else
      rc=$?
    fi
    if [[ "$rc" -eq 2 ]]; then
      show_help
      continue
    fi
    return "$rc"
  done
}

radiolist() {
  local prompt="$1" value rc
  shift
  while :; do
    if value=$("$UI" --backtitle "$UI_BACKTITLE" --title "$UI_TITLE" \
      --ok-label "Continue" --cancel-label "Cancel" --help-button --help-label "Help" \
      --radiolist "$prompt" "$UI_HEIGHT" "$UI_WIDTH" 10 "$@" 3>&1 1>&2 2>&3); then
      printf '%s\n' "$value"
      return 0
    else
      rc=$?
    fi
    if [[ "$rc" -eq 2 ]]; then
      show_help
      continue
    fi
    return "$rc"
  done
}

require_terminal_size

list_serial_ports() {
  local -a ports=()
  shopt -s nullglob
  for pat in /dev/ttyUSB* /dev/ttyACM* /dev/ttyS*; do
    [[ -e "$pat" ]] || continue
    ports+=("$pat")
  done
  shopt -u nullglob
  if ((${#ports[@]} == 0)); then
    ports=("/dev/ttyUSB0")
  fi
  printf '%s\n' "${ports[@]}"
}

list_alsa_cards() {
  if command -v arecord >/dev/null 2>&1; then
    arecord -l 2>/dev/null | awk '/card [0-9]+:/ {c=$2; gsub(":", "", c); desc=$0; gsub(/^.*card [0-9]+: /, "", desc); gsub(/,.*/, "", desc); printf "hw:%s,0 %s\n", c, desc}' || true
  fi
  if command -v aplay >/dev/null 2>&1; then
    aplay -l 2>/dev/null | awk '/card [0-9]+:/ {c=$2; gsub(":", "", c); desc=$0; gsub(/^.*card [0-9]+: /, "", desc); gsub(/,.*/, "", desc); printf "hw:%s,0 %s (playback)\n", c, desc}' || true
  fi
}

msgbox "Welcome to MAX25-Stack-Lite setup.

This wizard detects serial and audio devices on this computer, writes max25d.ini, and shows how to start max25d and max25-terminal locally.

It changes files only after you choose a save location. Use Help for key hints, or Cancel to leave without saving."

MODEM_KIND="$(menu "Packet radio modem path:" \
  serial "Serial TNC / USB KISS (T-Modem, TNC2)" \
  baycom "BayCom/based PC-COM (SER12 on COM/ttyS)" \
  crdop "CRDOP sound-card soft modem (MAX25-SoftModem)" \
  )" || exit 0

DEVICE_ID="tnc2c"
HARDWARE="tncs"
SERIAL_PATH=""
CRDOP_CAPTURE=""
CRDOP_PLAYBACK=""
WRITE_CRDOP_INI=0
WRITE_BCPR_INI=0
BCPR_INI_DEST=""

if [[ "$MODEM_KIND" == "baycom" ]]; then
  DEVICE_ID="max25e0"
  HARDWARE="tncs"
  WRITE_BCPR_INI=1
  mapfile -t PORTS < <(list_serial_ports)
  menu_args=()
  idx=0
  for p in "${PORTS[@]}"; do
    menu_args+=("$p" "serial port" "$((idx == 0 ? 1 : 0))")
    idx=$((idx + 1))
  done
  SERIAL_PATH="$(radiolist "Select PC-COM serial port (often /dev/ttyS0):" "${menu_args[@]}")" || exit 0
elif [[ "$MODEM_KIND" == "serial" ]]; then
  mapfile -t PORTS < <(list_serial_ports)
  menu_args=()
  idx=0
  for p in "${PORTS[@]}"; do
    menu_args+=("$p" "serial port" "$((idx == 0 ? 1 : 0))")
    idx=$((idx + 1))
  done
  SERIAL_PATH="$(radiolist "Select serial device:" "${menu_args[@]}")" || exit 0
  if [[ "$SERIAL_PATH" == /dev/ttyACM* ]]; then
    if yesno "Device looks like USB KISS (T-Modem). Use device id tmodem instead of tnc2c?"; then
      DEVICE_ID="tmodem"
    fi
  fi
else
  HARDWARE="soft-modems"
  DEVICE_ID="soft-crdop"
  WRITE_CRDOP_INI=1
  mapfile -t ALSA_LINES < <(list_alsa_cards)
  if ((${#ALSA_LINES[@]} == 0)); then
    msgbox "No ALSA cards listed (arecord/aplay). You can edit ~/.config/crdop/crdop.ini later."
    CRDOP_CAPTURE="hw:0,0"
    CRDOP_PLAYBACK="hw:0,0"
  else
    menu_args=()
    idx=0
    for line in "${ALSA_LINES[@]}"; do
      dev="${line%% *}"
      label="${line#* }"
      menu_args+=("$dev" "$label" "$((idx == 0 ? 1 : 0))")
      idx=$((idx + 1))
    done
    sel="$(radiolist "Select capture/playback ALSA device (hw:N,0):" "${menu_args[@]}")" || exit 0
    CRDOP_CAPTURE="$sel"
    CRDOP_PLAYBACK="$sel"
  fi
fi

CALLERID="$(inputbox "Your AX.25 caller ID (e.g. CB-0):" "CB-0")" || exit 0
CALLID="$(inputbox "Default destination callsign for CONNECT tests:" "QST")" || exit 0

if yesno "Write system config /etc/max25/max25d.ini? (No = ./local/max25d.ini in repo)"; then
  INI_DEST="/etc/max25/max25d.ini"
  CRDOP_INI_DEST="${HOME}/.config/crdop/crdop.ini"
  BCPR_INI_DEST="/etc/max25/max25-bcpr.ini"
  NEED_SUDO=1
else
  INI_DEST="${ROOT}/local/max25d.ini"
  CRDOP_INI_DEST="${ROOT}/local/crdop.ini"
  BCPR_INI_DEST="${ROOT}/local/max25-bcpr.ini"
  NEED_SUDO=0
fi

if [[ "$NEED_SUDO" -eq 1 ]]; then
  if ! command -v sudo >/dev/null 2>&1; then
    msgbox "System configuration needs sudo, but sudo is not available.

Choose No at the save-location screen to write local configuration in this repository."
    exit 1
  fi
  sudo mkdir -p "$(dirname "$INI_DEST")"
  mkdir -p "$(dirname "$CRDOP_INI_DEST")"
else
  mkdir -p "$(dirname "$INI_DEST")"
fi

write_max25d_ini() {
  local dest="$1"
  if [[ "$MODEM_KIND" == "baycom" ]]; then
    cat >"$dest" <<EOF
; MAX25-Stack-Lite — generated by max25-lite-setup.sh (BayCom/based)

[features]
max25_bcpr = yes

[daemon]
mode = standalone
hardware = tncs
device = max25e0

[network]
tcp_host = 127.0.0.1
tcp_port = 7325
unix_socket = /run/max25/modem.sock
tcp_password =

[modem]
callerid = ${CALLERID}
callid = ${CALLID}
ax25_ui = yes

[reporting]
error_transmissions = yes
voice_transmissions = yes
data_passes = 3
data_quality_min = 50
data_pass_seconds = 20

[stack]
auto_start = yes

[devices]
default = max25e0
max25e0 = max25-bcpr:bc0

[device.max25e0]
kiss_link = /tmp/max25-bcpr/kiss-bc0
max25_bcpr_ini = ${BCPR_INI_DEST}
EOF
  elif [[ "$MODEM_KIND" == "serial" ]]; then
    cat >"$dest" <<EOF
; MAX25-Stack-Lite — generated by max25-lite-setup.sh

[daemon]
mode = standalone
hardware = ${HARDWARE}
device = ${DEVICE_ID}

[network]
tcp_host = 127.0.0.1
tcp_port = 7325
unix_socket = /run/max25/modem.sock
; Lite: localhost only — terminal on same host as max25d
tcp_password =

[modem]
callerid = ${CALLERID}
callid = ${CALLID}
ax25_ui = yes

[reporting]
error_transmissions = yes
voice_transmissions = yes
data_passes = 3
data_quality_min = 50
data_pass_seconds = 20

[stack]
auto_start = yes
serial_watch = yes
serial_watch_interval = 60
stack_recover_only = yes
serial_bootwait_escalate = yes
serial_bootwait_escalate_after = 3

[devices]
default = ${DEVICE_ID}
${DEVICE_ID} = ${SERIAL_PATH}

[serial.${DEVICE_ID}]
baud = 19200
line = 8n1
dtr_rts = yes
kiss_entry = kiss_on
EOF
  else
    cat >"$dest" <<EOF
; MAX25-Stack-Lite — generated by max25-lite-setup.sh (CRDOP)

[daemon]
mode = standalone
hardware = soft-modems
device = soft-crdop

[network]
tcp_host = 127.0.0.1
tcp_port = 7325
unix_socket = /run/max25/modem.sock
; Lite: localhost only — terminal on same host as max25d
tcp_password =

[modem]
callerid = ${CALLERID}
callid = ${CALLID}
ax25_ui = yes

[reporting]
error_transmissions = yes
voice_transmissions = yes
data_passes = 3
data_quality_min = 50
data_pass_seconds = 20

[stack]
auto_start = yes

[devices]
default = soft-crdop
soft-crdop = crdop:default

[device.soft-crdop]
host = 127.0.0.1
port = 8515
listen = yes
EOF
  fi
}

write_crdop_ini() {
  local dest="$1"
  mkdir -p "$(dirname "$dest")"
  cat >"$dest" <<EOF
; MAX25-SoftModem (CRDOP) — generated by max25-lite-setup.sh

[profile]
radio_profile = cb

[modem]
speed_baud = 1200
duplex = half
max_speed_baud = 19200

[host]
port = 8515

[mycall]
call = ${CALLERID}

[audio]
backend = alsa-kernel
no_pulse = yes
capture = ${CRDOP_CAPTURE}
playback = ${CRDOP_PLAYBACK}

[coupling]
mode = line
EOF
}

write_bcpr_ini() {
  local dest="$1"
  mkdir -p "$(dirname "$dest")"
  cat >"$dest" <<EOF
; max25-bcpr — BayCom/based PC-COM (generated by max25-lite-setup.sh)

[max25-bcpr]
dry_run = no
state_dir = /tmp/max25-bcpr
user = max25
group = max25

[bc0]
enabled = yes
serial = ${SERIAL_PATH}
iobase = 0x3f8
irq = 4
mode = ser12*
kiss_link = /tmp/max25-bcpr/kiss-bc0
baud = 1200
tx_delay = 35
tx_tail = 2
slottime = 10
ppersist = 40
fulldup = no
EOF
}

if [[ "$NEED_SUDO" -eq 1 ]]; then
  tmp="$(mktemp)"
  TMP_FILES+=("$tmp")
  write_max25d_ini "$tmp"
  sudo cp "$tmp" "$INI_DEST"
  if [[ "$WRITE_CRDOP_INI" -eq 1 ]]; then
    tmp="$(mktemp)"
    TMP_FILES+=("$tmp")
    write_crdop_ini "$tmp"
    cp "$tmp" "$CRDOP_INI_DEST"
  fi
  if [[ "$WRITE_BCPR_INI" -eq 1 ]]; then
    tmp="$(mktemp)"
    TMP_FILES+=("$tmp")
    write_bcpr_ini "$tmp"
    sudo cp "$tmp" "$BCPR_INI_DEST"
  fi
else
  mkdir -p "${ROOT}/local"
  write_max25d_ini "$INI_DEST"
  if [[ "$WRITE_CRDOP_INI" -eq 1 ]]; then
    write_crdop_ini "$CRDOP_INI_DEST"
  fi
  if [[ "$WRITE_BCPR_INI" -eq 1 ]]; then
    write_bcpr_ini "$BCPR_INI_DEST"
  fi
fi

NEXT_STEPS="Configuration written:

  max25d.ini → ${INI_DEST}"
if [[ "$WRITE_CRDOP_INI" -eq 1 ]]; then
  NEXT_STEPS="${NEXT_STEPS}
  crdop.ini   → ${CRDOP_INI_DEST}"
fi
if [[ "$WRITE_BCPR_INI" -eq 1 ]]; then
  NEXT_STEPS="${NEXT_STEPS}
  max25-bcpr.ini → ${BCPR_INI_DEST}"
fi
NEXT_STEPS="${NEXT_STEPS}

Build (if not done):
  cmake -B build && cmake --build build
  sudo cmake --install build

BayCom/based only — start bcpr first (needs root on Linux):
  sudo max25-bcpr-ctl start --ini ${BCPR_INI_DEST}

Start daemon:
  ${ROOT}/scripts/run-max25d.sh ${INI_DEST}

CRDOP only — start soft modem (separate terminal):
  max25-ctl start --hardware soft-modems --device soft-crdop
  (or: crdop -c ${CRDOP_INI_DEST})

Terminal + CONNECT:
  ${ROOT}/scripts/run-max25-terminal.sh -U /run/max25/modem.sock
  At prompt: CONNECT ${CALLID}
  Or F10 menu → Connect

RX before TX: confirm receive/noise/SQ before live transmit."

"$UI" --backtitle "$UI_BACKTITLE" --title "Setup complete" --ok-label "Done" \
  --msgbox "$NEXT_STEPS" "$UI_HEIGHT" "$UI_WIDTH"