#!/bin/sh
# Tests for bin/check-index.
#
# The regression these exist for: SKILLS_INDEX.md is maintained by hand, and
# two skills (`dream`, `experiment-spec`) shipped without a row — the index
# rows lived on feature branches that were squash-merged after a directory
# reorg, so the SKILL.md landed and the row did not (#15, #22). Nothing
# errored; the index just quietly under-reported the library.

set -u

ROOT=$(CDPATH= cd -- "$(dirname -- "$0")/.." && pwd)
SUT="$ROOT/bin/check-index"

pass=0
fail=0
WORK=${TMPDIR:-/tmp}/check_index_test.$$

if [ ! -f "$SUT" ]; then
  printf 'FAIL: %s does not exist\n' "$SUT"
  exit 1
fi

cleanup() { rm -rf "$WORK"; }
trap cleanup EXIT INT TERM

# new_fixture <name> — a checkout with skills/alpha and skills/beta.
new_fixture() {
  _f="$WORK/$1"
  mkdir -p "$_f/skills/alpha" "$_f/skills/beta"
  printf -- '---\nname: alpha\ndescription: a\n---\n' > "$_f/skills/alpha/SKILL.md"
  printf -- '---\nname: beta\ndescription: b\n---\n' > "$_f/skills/beta/SKILL.md"
  printf '%s' "$_f"
}

index() {
  _dir=$1; shift
  printf '# Engineering Skills Index\n\n| Skill | Description | Use when |\n|---|---|---|\n' > "$_dir/SKILLS_INDEX.md"
  for _n in "$@"; do
    printf '| `%s` | desc | when |\n' "$_n" >> "$_dir/SKILLS_INDEX.md"
  done
}

# expect <0|1> <label> <fixture> [grep-for]
expect() {
  _want=$1; _label=$2; _fx=$3; _needle=${4:-}
  _out=$(sh "$SUT" "$_fx" 2>&1); _rc=$?
  if [ "$_rc" -ne "$_want" ]; then
    fail=$((fail + 1)); printf '  FAIL %s (want rc=%s got %s)\n%s\n' "$_label" "$_want" "$_rc" "$_out"; return
  fi
  if [ -n "$_needle" ] && ! printf '%s' "$_out" | grep -q "$_needle"; then
    fail=$((fail + 1)); printf '  FAIL %s (rc ok, but report never names %s)\n%s\n' "$_label" "$_needle" "$_out"; return
  fi
  pass=$((pass + 1)); printf '  ok   %s\n' "$_label"
}

fx=$(new_fixture complete); index "$fx" alpha beta
expect 0 'every skill has a row' "$fx"

fx=$(new_fixture missing); index "$fx" alpha
expect 1 'a skill with no row is reported' "$fx" beta

fx=$(new_fixture stale); index "$fx" alpha beta gamma
expect 1 'a row for a skill that does not exist is reported' "$fx" gamma

fx=$(new_fixture noindex)
expect 1 'a missing index is reported' "$fx" SKILLS_INDEX.md

printf '\ncheck_index: %d passed, %d failed\n' "$pass" "$fail"
[ "$fail" -eq 0 ]