#!/usr/bin/env bash
# #region docker.certs [C:3] [TYPE Module] [SEMANTICS docker,certs,ssl,ca,trust]
# @BRIEF Shared certificate installation functions for all containers.
# @LAYER Infrastructure
# @PRE CERTS_PATH points to mounted /opt/certs directory (may be empty or absent).
# @POST Corporate CA certificates installed into system trust store and NSS DB.
# @INVARIANT server.crt, server.key, server.p12, *.key, *.p12, *.pfx are never imported as CA.

set -euo pipefail

# ── normalize_cert – PEM/DER detection + conversion ──────────────────

normalize_cert() {
  local input="$1"
  local output="$2"
  if openssl x509 -in "$input" -inform PEM -noout 2>/dev/null; then
    cp "$input" "$output"
    return 0
  fi
  if openssl x509 -in "$input" -inform DER -noout 2>/dev/null; then
    openssl x509 -in "$input" -inform DER -out "$output" -outform PEM 2>/dev/null
    return 0
  fi
  return 1
}

# ── install_all_certs – single unified entry point ───────────────────

install_all_certs() {
  local certs_dir="${CERTS_PATH:-/opt/certs}"
  if [ ! -d "$certs_dir" ]; then
    echo "[certs] CERTS_PATH=${certs_dir} не существует – пропускаем"
    return 0
  fi

  local target="/usr/local/share/ca-certificates/custom"
  mkdir -p "$target"

  echo "[certs] Устанавливаем корпоративные сертификаты из ${certs_dir}..."
  local installed=0 skipped=0 invalid=0

  for f in "$certs_dir"/*; do
    [ -f "$f" ] || continue
    local name
    name="$(basename "$f")"

    # Skip non-CA server/private files
    case "$(echo "$name" | tr '[:upper:]' '[:lower:]')" in
      server.crt|server.key|server.pem|*.key|*.p12|*.pfx)
        echo "[certs]   ⏭️  пропускаем: ${name} (server/private файл)"
        skipped=$((skipped + 1))
        continue
        ;;
    esac

    # Accept .crt, .pem, .cer, .der
    case "$(echo "$name" | tr '[:upper:]' '[:lower:]')" in
      *.crt|*.pem|*.cer|*.der)
        # valid cert extension
        ;;
      *)
        echo "[certs]   ⚠️  неизвестный формат: ${name} – пропускаем"
        skipped=$((skipped + 1))
        continue
        ;;
    esac

    local out_name="${name%.*}.crt"
    local out_file="${target}/${out_name}"

    if normalize_cert "$f" "$out_file"; then
      echo "[certs]   ✅ ${name} (→ ${out_name})"
      installed=$((installed + 1))
    else
      echo "[certs]   ❌ невалидный сертификат: ${name}"
      invalid=$((invalid + 1))
    fi
  done

  if [ "$installed" -eq 0 ]; then
    echo "[certs] Нет CA-сертификатов для установки"
    return 0
  fi

  echo "[certs] Установлено: ${installed}, пропущено: ${skipped}, невалидно: ${invalid}"

  # Update system CA store
  if command -v update-ca-certificates &>/dev/null; then
    echo "[certs] Обновляем системное хранилище CA-сертификатов..."
    update-ca-certificates --fresh 2>&1 | sed 's/^/[certs]   /'
  fi

  # Create hash symlinks for OpenSSL capath
  echo "[certs] Создаём хеш-симлинки..."
  local sym_count=0
  for cert_file in "$target"/*.crt; do
    [ -f "$cert_file" ] || continue
    local cert_name
    cert_name="$(basename "$cert_file" .crt)"
    local hash_val
    hash_val="$(openssl x509 -in "$cert_file" -noout -hash 2>/dev/null || true)"
    if [ -n "$hash_val" ]; then
      local suffix=0
      local link_path="/etc/ssl/certs/${hash_val}.${suffix}"
      while [ -L "$link_path" ]; do
        if [ "$(readlink "$link_path")" = "$cert_file" ]; then
          break 2
        fi
        suffix=$((suffix + 1))
        link_path="/etc/ssl/certs/${hash_val}.${suffix}"
      done
      if [ ! -L "$link_path" ]; then
        ln -sf "$cert_file" "$link_path"
        sym_count=$((sym_count + 1))
      fi
    fi
  done
  echo "[certs] Создано хеш-симлинок: ${sym_count}"
}

# ── install_ca_to_nss – NSS DB for Chromium/Playwright ──────────────

install_ca_to_nss() {
  if ! command -v certutil &>/dev/null; then
    return 0
  fi
  local target="/usr/local/share/ca-certificates/custom"
  if [ ! -d "$target" ] || [ -z "$(ls -A "$target" 2>/dev/null)" ]; then
    return 0
  fi
  local nssdb="${HOME}/.pki/nssdb"
  mkdir -p "$nssdb"
  local nss_count=0
  echo "[certs] Импортируем сертификаты в NSS DB..."
  for cert_file in "$target"/*.crt; do
    [ -f "$cert_file" ] || continue
    local cert_name
    cert_name="$(basename "$cert_file" .crt)"
    certutil -A -d "sql:${nssdb}" -t "C,," -n "custom-${cert_name}" -i "$cert_file" 2>/dev/null && nss_count=$((nss_count + 1)) || true
  done
  echo "[certs] Импортировано в NSS: ${nss_count}"
}

# ── skip_server_files – remove server certs from CA dir ──────────────

skip_server_files_filter() {
  # Used by frontend to skip server.crt from being installed as CA
  local certs_dir="${1:-/opt/certs}"
  [ -d "$certs_dir" ] || return 0
  for f in "$certs_dir"/*.crt "$certs_dir"/*.pem; do
    [ -f "$f" ] || continue
    case "$(basename "$f" | tr '[:upper:]' '[:lower:]')" in
      server.crt|server.key) continue ;;
    esac
    echo "$f"
  done
}
# #endregion docker.certs