#!/usr/bin/env bash
#
# development/tests/test-config-vim.sh — Vim counterpart of test-config.sh.
#
# Runs development/tests/test-config-vim.vim under headless Vim, which dumps
# the Vim client's `initialization_options` payload (nuwiki#lsp#settings())
# as `key=value` lines, then diffs against the shared golden
# config-expected.txt. Matching the same golden the Neovim harness uses is
# what proves Vim/Neovim config parity.
#
# Exit code: 0 when the payload matches the golden, 1 otherwise. Skips
# (exit 0) when vim is not installed.

set -euo pipefail

REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"

log() { printf '\033[1;34m[config-vim]\033[0m %s\n' "$*"; }

if ! command -v vim >/dev/null 2>&1; then
  log 'vim not installed — skipping'
  exit 0
fi

TMP="$(mktemp -d -t nuwiki-config-vim-test-XXXXXX)"
trap 'rm -rf "$TMP"' EXIT

GOLDEN="$REPO_ROOT/development/tests/config-expected.txt"
OUT="$TMP/vim-config.txt"

VIMRC="$TMP/vimrc"
cat > "$VIMRC" <<EOF
set nocompatible
let &runtimepath = '$REPO_ROOT' . ',' . &runtimepath
filetype plugin indent on
EOF

log 'running Vim config harness…'
# `</dev/null` so ex-mode doesn't hang on stdin; `timeout` guards CI.
NUWIKI_CONFIG_OUT="$OUT" \
  timeout 30 vim -e -s -u "$VIMRC" \
    -c "source $REPO_ROOT/development/tests/test-config-vim.vim" \
    </dev/null >"$TMP/vim.log" 2>&1 || true

if [[ ! -f "$OUT" ]]; then
  echo 'config harness produced no output' >&2
  echo '--- vim log ---' >&2
  cat "$TMP/vim.log" >&2 || true
  exit 1
fi

if diff -u "$GOLDEN" "$OUT"; then
  log 'Vim config payload matches golden ✓'
  exit 0
fi

echo 'Vim config payload DIVERGED from golden (see diff above)' >&2
exit 1