#!/usr/bin/env bash
# WCAG 2.1 AA audit script — runs Lighthouse + axe-core against key pages.
#
# Usage:
#   ./scripts/wcag-audit.sh                       # Default: https://didi.integrare.local
#   BASE_URL=http://localhost:5173 ./scripts/wcag-audit.sh
#
# Required deps (auto-install if missing):
#   - @axe-core/cli
#   - lighthouse
#
# Output:
#   - reports/wcag/<timestamp>/lighthouse-<page>.html
#   - reports/wcag/<timestamp>/axe-<page>.json
#   - reports/wcag/<timestamp>/SUMMARY.md
#
# Audit produces a formal report for PNRR recepție (cerință E5 caiet sarcini).
set -euo pipefail

BASE_URL="${BASE_URL:-https://didi.integrare.local}"
TIMESTAMP=$(date -u +"%Y%m%d-%H%M%S")
OUT_DIR="reports/wcag/${TIMESTAMP}"
mkdir -p "$OUT_DIR"

PAGES=(
  "/"
  "/dashboard"
  "/demo"
  "/email-verified"
)

echo "=== WCAG 2.1 AA audit — $(date -u) ==="
echo "Base URL: $BASE_URL"
echo "Output: $OUT_DIR"
echo ""

# Auto-install tools if missing
if ! command -v lighthouse >/dev/null 2>&1; then
  echo "Installing lighthouse globally..."
  npm install -g lighthouse@latest >/dev/null 2>&1
fi
if ! command -v axe >/dev/null 2>&1; then
  echo "Installing @axe-core/cli globally..."
  npm install -g @axe-core/cli@latest >/dev/null 2>&1
fi

SUMMARY="$OUT_DIR/SUMMARY.md"
cat > "$SUMMARY" <<EOF
# WCAG 2.1 AA Audit — $(date -u +"%Y-%m-%d")

Base URL: \`$BASE_URL\`
Tools: Lighthouse + axe-core (industry-standard a11y testing)

## Pages audited
EOF

for page in "${PAGES[@]}"; do
  SAFE_NAME=$(echo "$page" | tr '/' '_' | sed 's/^_//' | sed 's/^$/root/')
  URL="${BASE_URL}${page}"
  echo "--- Auditing $URL ---"

  # Lighthouse (full performance + a11y + SEO)
  lighthouse "$URL" \
    --only-categories=accessibility,seo \
    --output=html,json \
    --output-path="$OUT_DIR/lighthouse-$SAFE_NAME" \
    --chrome-flags="--headless --no-sandbox" \
    --quiet 2>&1 || echo "Lighthouse failed for $URL"

  # axe-core (WCAG-specific violations)
  axe "$URL" \
    --tags wcag2a,wcag2aa,wcag21a,wcag21aa \
    --save "$OUT_DIR/axe-$SAFE_NAME.json" \
    --exit 0 2>&1 || echo "Axe failed for $URL"

  # Extract scores for summary
  if [ -f "$OUT_DIR/lighthouse-$SAFE_NAME.report.json" ]; then
    A11Y_SCORE=$(python3 -c "
import json
d = json.load(open('$OUT_DIR/lighthouse-$SAFE_NAME.report.json'))
print(int(d['categories']['accessibility']['score'] * 100))
" 2>/dev/null || echo "N/A")
    SEO_SCORE=$(python3 -c "
import json
d = json.load(open('$OUT_DIR/lighthouse-$SAFE_NAME.report.json'))
print(int(d['categories'].get('seo', {}).get('score', 0) * 100))
" 2>/dev/null || echo "N/A")
  else
    A11Y_SCORE="N/A"; SEO_SCORE="N/A"
  fi

  AXE_VIOLATIONS=$(python3 -c "
import json
try:
    d = json.load(open('$OUT_DIR/axe-$SAFE_NAME.json'))
    if isinstance(d, list) and d:
        d = d[0]
    print(len(d.get('violations', [])))
except: print('N/A')
" 2>/dev/null || echo "N/A")

  echo "" >> "$SUMMARY"
  echo "### \`$page\`" >> "$SUMMARY"
  echo "- Lighthouse A11y score: **$A11Y_SCORE / 100**" >> "$SUMMARY"
  echo "- Lighthouse SEO score: **$SEO_SCORE / 100**" >> "$SUMMARY"
  echo "- Axe-core violations (WCAG 2.1 AA): **$AXE_VIOLATIONS**" >> "$SUMMARY"
  echo "- Reports: [lighthouse]($(basename "$OUT_DIR")/lighthouse-$SAFE_NAME.report.html), [axe]($(basename "$OUT_DIR")/axe-$SAFE_NAME.json)" >> "$SUMMARY"
done

echo "" >> "$SUMMARY"
echo "## WCAG 2.1 AA Compliance threshold" >> "$SUMMARY"
echo "" >> "$SUMMARY"
echo "- **Target**: Lighthouse A11y ≥ 95, axe-core violations = 0" >> "$SUMMARY"
echo "- **Caiet sarcini cere**: WCAG 2.1 AA demonstrabil (contrast 4.5:1, focus visible, keyboard nav, ARIA, screen readers)" >> "$SUMMARY"
echo "" >> "$SUMMARY"
echo "## Next steps if violations found" >> "$SUMMARY"
echo "" >> "$SUMMARY"
echo "1. Open \`axe-<page>.json\` — see \`violations[]\` array" >> "$SUMMARY"
echo "2. Each violation has \`description\`, \`helpUrl\`, \`nodes[]\` with selector" >> "$SUMMARY"
echo "3. Fix in source code" >> "$SUMMARY"
echo "4. Re-run script — verify violations = 0" >> "$SUMMARY"

echo ""
echo "=== Audit complete ==="
echo "Summary: $SUMMARY"
echo "Open lighthouse HTML reports in browser for visual review."