#!/usr/bin/env bash
set -euo pipefail
source ./lib.sh

log "MOTD installieren …"
install -d /usr/local/bin

cat >/usr/local/bin/mw-motd <<'SH'
#!/usr/bin/env bash
# MOTD – MailWolt
# bewusst KEIN "set -e" und KEIN pipefail; MOTD darf nie hart abbrechen
set -u

# ---------- Farben ----------
NC="\033[0m"; WH="\033[1;37m"; CY="\033[1;36m"; GY="\033[0;90m"
GR="\033[1;32m"; YE="\033[1;33m"; RD="\033[1;31m"

# ---------- Breite / Zentrierung ----------
W=110
term_cols=$(tput cols 2>/dev/null || echo $W)
[ "$term_cols" -gt "$W" ] && pad=$(( (term_cols - W)/2 )) || pad=0
sp(){ [ "$1" -gt 0 ] && printf "%${1}s" " " || true; }
center() { local s="$1"; local n=$(( (W - ${#s})/2 )); sp $((pad+n)); printf "%s\n" "$s"; }
rule(){ sp "$pad"; printf "%0.s=" $(seq 1 "$W"); printf "\n"; }
title(){ sp "$pad"; local t="$1"; local lf=$(( (W - ${#t} - 2)/2 )); local rf=$(( W - ${#t} - 2 - lf )); \
         printf "%s" "$(printf '─%.0s' $(seq 1 $lf))"; printf " %s " "$t"; printf "%s\n" "$(printf '─%.0s' $(seq 1 $rf))"; }
kv(){ sp "$pad"; printf "%-12s: %s\n" "$1" "$2"; }

# ---------- Installer-/App-Variablen ----------
UI_HOST=""; WEBMAIL_HOST=""; MAIL_HOSTNAME=""
[ -r /etc/mailwolt/installer.env ] && . /etc/mailwolt/installer.env || true

# ---------- Systemdaten ----------
now="$(date '+%Y-%m-%d %H:%M:%S %Z' 2>/dev/null || echo '-')"
upt="$(uptime -p 2>/dev/null || echo '-')"
cores="$(nproc 2>/dev/null || echo 1)"
load_raw="$(awk '{printf "%s / %s / %s",$1,$2,$3}' /proc/loadavg 2>/dev/null || echo '0.00 / 0.00 / 0.00')"
load1="$(awk '{print $1}' /proc/loadavg 2>/dev/null || echo 0)"

# RAM/SWAP
mem_total="$(awk '/MemTotal/ {print int($2/1024)}' /proc/meminfo 2>/dev/null || echo 0)"
mem_avail="$(awk '/MemAvailable/ {print int($2/1024)}' /proc/meminfo 2>/dev/null || echo 0)"
mem_used=$(( mem_total - mem_avail ))
swap_total="$(awk '/SwapTotal/ {print int($2/1024)}' /proc/meminfo 2>/dev/null || echo 0)"
swap_free="$(awk '/SwapFree/  {print int($2/1024)}' /proc/meminfo 2>/dev/null || echo 0)"
swap_used=$(( swap_total - swap_free ))

pct(){ local u="$1" t="$2"; [ "$t" -gt 0 ] || { echo 0; return; }; awk -v u="$u" -v t="$t" 'BEGIN{printf "%d",(u*100)/t}' ; }
ram_pct=$(pct "$mem_used" "$mem_total")
swap_pct=$(pct "$swap_used" "$swap_total")

# Disks
df_line(){ df -hP "$1" 2>/dev/null | awk 'NR==2{printf "%s / %s (%s)",$3,$2,$5}'; }
df_pct(){  df -P  "$1" 2>/dev/null | awk 'NR==2{gsub("%","",$5);print $5+0}'; }
disk_root="$(df_line /)"; pct_root="$(df_pct /)"
disk_var="$(df_line /var 2>/dev/null)"; [ -n "$disk_var" ] || disk_var="-"
pct_var="$(df_pct /var 2>/dev/null)"; [ -n "$pct_var" ] || pct_var=0

# IPs (int/ext)
ipv4_int="$(hostname -I 2>/dev/null | awk '{for(i=1;i<=NF;i++) if($i!~/:/){print $i;exit}}')"
ipv6_int="$(hostname -I 2>/dev/null | awk '{for(i=1;i<=NF;i++) if($i~/:/){print $i;exit}}')"
ipv4_ext="$(curl -4fsS --max-time 1 https://ifconfig.me 2>/dev/null || true)"
ipv6_ext="$(curl -6fsS --max-time 1 https://ifconfig.me 2>/dev/null || true)"

# ---------- Status-Farben ----------
mark(){ # value thresholdY thresholdR
  local v="$1" y="$2" r="$3"
  if [ "$v" -ge "$r" ]; then printf "${RD}[HIGH]${NC}"
  elif [ "$v" -ge "$y" ]; then printf "${YE}[WARN]${NC}"
  else printf "${GR}[OK]${NC}"
  fi
}
# Load/CPU-Schwellen (pro Core)
load_pct=$(awk -v l="$load1" -v c="$cores" 'BEGIN{if(c<1)c=1; printf "%d", (l/c)*100}')
m_load="$(mark "$load_pct" 70 100)"
m_ram="$(mark "$ram_pct"   75 90)"
m_swap="$(mark "$swap_pct" 10 50)"
m_root="$(mark "$pct_root" 75 90)"
m_var="$(mark "$pct_var"   75 90)"

# ---------- Header ----------
rule
center ""
center "::::    ::::      :::     ::::::::::: :::      :::       :::  ::::::::  :::    :::::::::::"
center ":+:+:+ :+:+:+   :+: :+:       :+:     :+:      :+:       :+: :+:    :+: :+:        :+:   "
center ":+: +:+:+ +:+  +:+   +:+      +:+     +:+      +:+       +:+ +:+    +:+ +:+        +:+   "
center "+#+  +:+  +#+ +#++:++#++:     +#+     +#+      +#+  +:+  +#+ +#+    +:+ +#+        +#+   "
center "+#+       +#+ +#+     +#+     +#+     +#+      +#+ +#+#+ +#+ +#+    +#+ +#+        +#+   "
center "#+#       #+# #+#     #+#     #+#     #+#       #+#+# #+#+#  #+#    #+# #+#        #+#   "
center "###       ### ###     ### ########### ########## ###   ###    ########  ########## ###   "
center ""
rule

# ---------- System ----------
kv "Date / Time" "${YE}${now}${NC}"
sp "$pad"; printf "%-12s: int %-40s ext %s\n" "IPv4" "${ipv4_int:--}" "${ipv4_ext:--}"
sp "$pad"; printf "%-12s: int %-40s ext %s\n" "IPv6" "${ipv6_int:--}" "${ipv6_ext:--}"
kv "Uptime"     "$upt"
sp "$pad"; printf "%-12s: %s cores, load %s  %b\n" "CPU" "$cores" "$load_raw" "$m_load"
sp "$pad"; printf "%-12s: %s MiB / %s MiB (%d%%) %b   %-5s %s MiB / %s MiB (%d%%) %b\n" \
  "RAM" "$mem_used" "$mem_total" "$ram_pct" "$m_ram" "SWAP:" "$swap_used" "$swap_total" "$swap_pct" "$m_swap"
sp "$pad"; printf "%-12s: / %s %b   %-5s %s %b\n" \
  "Disk" "$disk_root" "$m_root" "/var:" "$disk_var" "$m_var"
echo

# ---------- Domains ----------
title "Domains"
[ -n "${UI_HOST:-}" ]      && kv "UI"      "${UI_HOST}"
[ -n "${WEBMAIL_HOST:-}" ] && kv "Webmail" "${WEBMAIL_HOST}"
[ -n "${MAIL_HOSTNAME:-}" ]&& kv "MX"      "${MAIL_HOSTNAME}"
echo

# ---------- Services (4 Spalten, bündig) ----------
title "Services"
svc_state(){ systemctl is-active --quiet "$1" && printf "${GR}[OK]${NC}" || printf "${RD}[FAIL]${NC}"; }
SVC=( nginx mariadb redis-server postfix dovecot rspamd opendkim opendmarc clamav-daemon fail2ban mailwolt-ws mailwolt-queue mailwolt-schedule )

i=0; line=""
for s in "${SVC[@]}"; do
  st="$(svc_state "$s")"
  seg="$(printf "%-18s %-7s" "$s" "$st")"
  line="$line$seg"
  i=$((i+1))
  if [ $((i%4)) -eq 0 ]; then sp "$pad"; echo "$line"; line=""; else line="$line  "; fi
done
[ -n "$line" ] && { sp "$pad"; echo "$line"; }
echo

exit 0
SH

chmod 755 /usr/local/bin/mw-motd

# update-motd Hook
if [[ -d /etc/update-motd.d ]]; then
  cat >/etc/update-motd.d/10-mailwolt <<'SH'
#!/usr/bin/env bash
/usr/local/bin/mw-motd
SH
  chmod +x /etc/update-motd.d/10-mailwolt
  [[ -f /etc/update-motd.d/50-motd-news ]] && chmod -x /etc/update-motd.d/50-motd-news || true
else
  # Fallback für Systeme ohne dynamic MOTD
  cat >/etc/profile.d/10-mailwolt-motd.sh <<'SH'
case "$-" in *i*) /usr/local/bin/mw-motd ;; esac
SH
fi

: > /etc/motd 2>/dev/null || true
log "[✓] MOTD installiert."