#!/usr/bin/env bash
set -euo pipefail

CERT_DIR="$HOME/.config/isync"
CERT_FILE="$CERT_DIR/proton-bridge.pem"

mkdir -p "$CERT_DIR"
chmod 700 "$CERT_DIR"

# Ensure Bridge port is up (wait up to 30s)
for i in $(seq 1 30); do
  if ss -ltn '( sport = :1143 )' | grep -q 1143; then
    break
  fi
  sleep 1
done

if ! ss -ltn '( sport = :1143 )' | grep -q 1143; then
  echo "Bridge not listening on 127.0.0.1:1143" >&2
  exit 1
fi

tmp="$(mktemp)"

openssl s_client -starttls imap -connect 127.0.0.1:1143 -showcerts </dev/null 2>/dev/null \
| awk '
  /BEGIN CERTIFICATE/ {c++}
  c==1 {print}
  /END CERTIFICATE/ && c==1 {exit}
' > "$tmp"

# sanity check
openssl x509 -in "$tmp" -noout >/dev/null 2>&1

mv "$tmp" "$CERT_FILE"
chmod 600 "$CERT_FILE"

echo "Updated: $CERT_FILE"