#!/usr/bin/env bash
# validate-plugin.sh — Foundation plugin structure validator for claude-design
# Usage: bash tests/validate-plugin.sh
# Exit codes: 0 = all checks pass; 1 = at least one FAIL
#
# Forked from plugins/ms-ai-architect/tests/validate-plugin.sh:
#   keep:    helpers (pass/fail/warn), counters, PLUGIN_ROOT, JSON-validity check,
#            README/CLAUDE.md existence checks
#   strip:   agent frontmatter loop, commands frontmatter loop, KB-staleness checks,
#            architect:* command-name assertions, references-count assertions
#   add:     SKILL.md frontmatter + description-length, LICENSE content, GOVERNANCE
#            existence, .coverage.md existence, forbidden-command-name regex (h),
#            operator-private-context grep (i), Norwegian-leakage grep (j)

set -euo pipefail
LC_ALL=en_US.UTF-8

RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m'

PLUGIN_ROOT="$(cd "$(dirname "$0")/.." && pwd)"
PASS=0
FAIL=0
WARN=0

pass() { printf "${GREEN}  ✓ %s${NC}\n" "$1"; PASS=$((PASS + 1)); }
fail() { printf "${RED}  ✗ %s${NC}\n" "$1"; FAIL=$((FAIL + 1)); }
warn() { printf "${YELLOW}  ⚠ %s${NC}\n" "$1"; WARN=$((WARN + 1)); }

echo "=== claude-design Plugin Validation ==="
echo "Plugin root: $PLUGIN_ROOT"
echo ""

# -------------------------------------------------------
# Check (a): plugin.json valid + required fields
# -------------------------------------------------------
echo "--- (a) plugin.json structure ---"

PLUGIN_JSON="$PLUGIN_ROOT/.claude-plugin/plugin.json"

if [ ! -f "$PLUGIN_JSON" ]; then
  fail ".claude-plugin/plugin.json missing"
else
  if node -e "JSON.parse(require('fs').readFileSync('$PLUGIN_JSON'))" 2>/dev/null; then
    pass ".claude-plugin/plugin.json is valid JSON"
  else
    fail ".claude-plugin/plugin.json is invalid JSON"
  fi

  for field in name version description; do
    if node -e "const p = JSON.parse(require('fs').readFileSync('$PLUGIN_JSON')); if (typeof p['$field'] !== 'string' || p['$field'] === '') process.exit(1)" 2>/dev/null; then
      pass "plugin.json has '$field'"
    else
      fail "plugin.json missing or empty '$field'"
    fi
  done
fi
echo ""

# -------------------------------------------------------
# Check (b): at least one SKILL.md under skills/*/
# -------------------------------------------------------
echo "--- (b) SKILL.md presence ---"

SKILL_COUNT=0
for skill_file in "$PLUGIN_ROOT"/skills/*/SKILL.md; do
  [ -f "$skill_file" ] || continue
  SKILL_COUNT=$((SKILL_COUNT + 1))
done

if [ "$SKILL_COUNT" -ge 1 ]; then
  pass "found $SKILL_COUNT SKILL.md file(s) under skills/*/"
else
  fail "no SKILL.md found under skills/*/"
fi
echo ""

# -------------------------------------------------------
# Check (c): SKILL.md frontmatter has name+description, description >=400 chars
# -------------------------------------------------------
echo "--- (c) SKILL.md frontmatter quality ---"

for skill_file in "$PLUGIN_ROOT"/skills/*/SKILL.md; do
  [ -f "$skill_file" ] || continue
  basename_skill="$(basename "$(dirname "$skill_file")")/SKILL.md"

  first_line="$(head -n 1 "$skill_file")"
  if [ "$first_line" != "---" ]; then
    fail "$basename_skill: missing frontmatter delimiter on line 1"
    continue
  fi

  frontmatter="$(awk 'NR==1{next} /^---$/{exit} {print}' "$skill_file")"

  if echo "$frontmatter" | grep -qE '^name:'; then
    pass "$basename_skill: has 'name:'"
  else
    fail "$basename_skill: missing 'name:'"
  fi

  if echo "$frontmatter" | grep -qE '^description:'; then
    pass "$basename_skill: has 'description:'"
  else
    fail "$basename_skill: missing 'description:'"
  fi

  desc_len="$(awk '/^description: \|/,/^---$/' "$skill_file" | wc -c | tr -d '[:space:]')"
  if [ -z "$desc_len" ]; then desc_len=0; fi
  if [ "$desc_len" -ge 400 ]; then
    pass "$basename_skill: description block is $desc_len chars (>=400)"
  else
    fail "$basename_skill: description block is $desc_len chars (<400)"
  fi
done
echo ""

# -------------------------------------------------------
# Check (d): LICENSE exists, non-empty, contains "MIT License"
# -------------------------------------------------------
echo "--- (d) LICENSE ---"

LICENSE_FILE="$PLUGIN_ROOT/LICENSE"

if [ ! -f "$LICENSE_FILE" ]; then
  fail "LICENSE missing"
elif [ ! -s "$LICENSE_FILE" ]; then
  fail "LICENSE is empty"
elif ! grep -q "MIT License" "$LICENSE_FILE"; then
  fail "LICENSE does not contain 'MIT License'"
else
  pass "LICENSE exists, non-empty, MIT License"
fi
echo ""

# -------------------------------------------------------
# Check (e): GOVERNANCE.md exists, non-empty
# -------------------------------------------------------
echo "--- (e) GOVERNANCE.md ---"

GOVERNANCE_FILE="$PLUGIN_ROOT/GOVERNANCE.md"

if [ ! -f "$GOVERNANCE_FILE" ]; then
  fail "GOVERNANCE.md missing"
elif [ ! -s "$GOVERNANCE_FILE" ]; then
  fail "GOVERNANCE.md is empty"
else
  pass "GOVERNANCE.md exists, non-empty"
fi
echo ""

# -------------------------------------------------------
# Check (f): README.md + CLAUDE.md exist, non-empty
# -------------------------------------------------------
echo "--- (f) README.md and CLAUDE.md ---"

for f in README.md CLAUDE.md; do
  fpath="$PLUGIN_ROOT/$f"
  if [ ! -f "$fpath" ]; then
    fail "$f missing"
  elif [ ! -s "$fpath" ]; then
    fail "$f is empty"
  else
    pass "$f exists, non-empty"
  fi
done
echo ""

# -------------------------------------------------------
# Check (g): .coverage.md exists at plugin root
# -------------------------------------------------------
echo "--- (g) .coverage.md ---"

COVERAGE_FILE="$PLUGIN_ROOT/.coverage.md"

if [ ! -f "$COVERAGE_FILE" ]; then
  fail ".coverage.md missing"
elif [ ! -s "$COVERAGE_FILE" ]; then
  fail ".coverage.md is empty"
else
  pass ".coverage.md exists, non-empty"
fi
echo ""

# -------------------------------------------------------
# Check (h): forbidden command-name regex (scope fence vs
#            Anthropic's knowledge-work-plugins/design)
# -------------------------------------------------------
echo "--- (h) forbidden command-name regex ---"

FORBIDDEN_REGEX='^name:[[:space:]]*(claude-design:)?(critique|accessibility|ux-copy|research-synthesis|design-system|handoff)[[:space:]]*$'

H_HIT=0

for cmd_file in "$PLUGIN_ROOT"/commands/*.md "$PLUGIN_ROOT"/skills/*/SKILL.md; do
  [ -f "$cmd_file" ] || continue
  if grep -qE "$FORBIDDEN_REGEX" "$cmd_file"; then
    fail "command-name collision with Anthropic's official knowledge-work-plugins/design plugin: $cmd_file"
    H_HIT=$((H_HIT + 1))
  fi
done

if [ "$H_HIT" -eq 0 ]; then
  pass "no forbidden command-name collisions"
fi
echo ""

# -------------------------------------------------------
# Shipped-content enumeration (shared by checks (i) and (j))
#
# "Shipped" is derived from git, not from a list of file names: any file git
# ignores is session state that never leaves this machine, so it is not shipped
# content. A name list cannot hold this line -- it already rotted once, when the
# STATE.md convention replaced the three local-only files it knows about, and
# the resulting false positive was self-reproducing (any note explaining the
# failure re-triggered it).
#
# Derived from `git check-ignore` rather than `git ls-files` on purpose: an
# untracked Markdown file that is NOT ignored is about to ship and must stay in
# scope, so new content is checked before it is ever staged.
#
# When git cannot answer (no repo, no git binary) every file is treated as
# shipped: conservative, so these checks can still fail rather than silently
# passing on an empty file list.
# -------------------------------------------------------
echo "--- shipped-content enumeration (git-derived) ---"

GIT_AVAILABLE=1
if ! git -C "$PLUGIN_ROOT" rev-parse --is-inside-work-tree >/dev/null 2>&1; then
  GIT_AVAILABLE=0
fi

shipped_md_files() {
  find "$PLUGIN_ROOT" -type f -name '*.md' "$@" 2>/dev/null | sort | while IFS= read -r f; do
    if [ "$GIT_AVAILABLE" -eq 1 ] && git -C "$PLUGIN_ROOT" check-ignore -q -- "$f" 2>/dev/null; then
      continue
    fi
    printf '%s\n' "$f"
  done
}

# grep_shipped <ERE> [find-predicates...] -> "path:line:text" lines
grep_shipped() {
  local regex="$1"
  shift
  local f hits line
  shipped_md_files "$@" | while IFS= read -r f; do
    [ -n "$f" ] || continue
    hits="$(grep -nE "$regex" "$f" 2>/dev/null || true)"
    [ -n "$hits" ] || continue
    printf '%s\n' "$hits" | while IFS= read -r line; do
      printf '%s:%s\n' "$f" "$line"
    done
  done
}

if [ "$GIT_AVAILABLE" -eq 0 ]; then
  warn "git unavailable: checks (i) and (j) treat every Markdown file as shipped content"
fi
printf "  shipped Markdown files in scope: %s (of %s on disk)\n" \
  "$(shipped_md_files | wc -l | tr -d ' ')" \
  "$(find "$PLUGIN_ROOT" -type f -name '*.md' 2>/dev/null | wc -l | tr -d ' ')"
echo ""

# -------------------------------------------------------
# Check (i): operator-private-context grep
# -------------------------------------------------------
echo "--- (i) operator-private-context grep ---"

I_HITS="$(grep_shipped '(kjell|vegvesen|NEXT-SESSION-PROMPT|REMEMBER\.md content from)' \
  -not -path "$PLUGIN_ROOT/.claude/*" \
  -not -path "$PLUGIN_ROOT/tests/*" \
  || true)"

if [ -z "$I_HITS" ]; then
  pass "no operator-private context leaks in shipped content"
else
  while IFS= read -r hit; do
    fail "operator-private context leak in shipped content (brief NFR): $hit"
  done < <(printf '%s\n' "$I_HITS")
fi
echo ""

# -------------------------------------------------------
# Check (j): Norwegian-leakage grep (WARN, not FAIL)
# -------------------------------------------------------
echo "--- (j) Norwegian-leakage grep ---"

J_HITS="$(grep_shipped '[æøåÆØÅ]' \
  -not -path "$PLUGIN_ROOT/.claude/*" \
  || true)"

if [ -z "$J_HITS" ]; then
  pass "no Norwegian diacritics in shipped content"
else
  while IFS= read -r hit; do
    warn "Norwegian diacritic in shipped content (review case-by-case): $hit"
  done < <(printf '%s\n' "$J_HITS")
fi
echo ""

# -------------------------------------------------------
# Summary
# -------------------------------------------------------
echo "=== Summary ==="
printf "Pass: %d  Fail: %d  Warn: %d\n" "$PASS" "$FAIL" "$WARN"

if [ "$FAIL" -gt 0 ]; then
  exit 1
fi
exit 0