#!/usr/bin/env bash
# Namespacing gate (docs/rules/code-style.md): one non-private top-level type per
# file. A file with more than one file-scope type declaration is a violation:
# split it, or mark helper types private/fileprivate.
#
# Inert until Sources exists. Portable: bash 3.2 and 4+.

set -u

SRC="Sources"
if [ ! -d "$SRC" ]; then
  echo "namespacing: no $SRC yet, skipping."
  exit 0
fi

FAIL=0
while IFS= read -r f; do
  count=$(grep -cE "^(public |package |internal )?(actor|struct|enum|protocol|class|final class) [A-Z]" "$f")
  if [ "$count" -gt 1 ]; then
    echo "namespacing: $count file-scope types in $f (one per file)" >&2
    FAIL=1
  fi

  public_types=$(grep -nE "^public (actor|struct|enum|protocol|class|final class) [A-Z]" "$f" || true)
  if [ -n "$public_types" ]; then
    if [ "$f" = "Sources/PureXML.swift" ] &&
      [ "$public_types" = "2:public enum PureXML {" ]; then
      :
    else
      echo "namespacing: public file-scope type in $f (wrap it under PureXML)" >&2
      printf '%s\n' "$public_types" | sed 's/^/  /' >&2
      FAIL=1
    fi
  fi
done < <(find "$SRC" -name "*.swift")

if [ "$FAIL" -ne 0 ]; then
  echo "namespacing: gate failed. Rule: docs/rules/code-style.md" >&2
fi
exit "$FAIL"