name: CI

on:
  pull_request:
    branches:
      - main

jobs:
  validate:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Validate HTML
        run: |
          test -f index.html || { echo "ERROR: index.html missing"; exit 1; }
          python3 -c "
          import html.parser, sys
          class V(html.parser.HTMLParser):
              def __init__(self):
                  super().__init__()
              def handle_starttag(self, tag, attrs): pass
              def handle_endtag(self, tag): pass
          v = V()
          try:
              v.feed(open('index.html').read())
              print('HTML: OK')
          except Exception as e:
              print(f'HTML: FAIL - {e}')
              sys.exit(1)
          "

      - name: Validate JavaScript
        run: |
          FAIL=0
          for f in $(find . -name '*.js' -not -path './node_modules/*' -not -name 'sw.js'); do
            if ! node --check "$f" 2>/dev/null; then
              echo "FAIL: $f"
              FAIL=1
            else
              echo "OK: $f"
            fi
          done
          exit $FAIL

      - name: Validate JSON
        run: |
          FAIL=0
          for f in $(find . -name '*.json' -not -path './node_modules/*'); do
            if ! python3 -c "import json; json.load(open('$f'))"; then
              echo "FAIL: $f"
              FAIL=1
            else
              echo "OK: $f"
            fi
          done
          exit $FAIL

      - name: Check file size budget
        run: |
          FAIL=0
          for f in $(find . -name '*.js' -not -path './node_modules/*'); do
            SIZE=$(wc -c < "$f")
            if [ "$SIZE" -gt 512000 ]; then
              echo "FAIL: $f is ${SIZE} bytes (budget: 512000)"
              FAIL=1
            else
              echo "OK: $f (${SIZE} bytes)"
            fi
          done
          exit $FAIL

  auto-merge:
    needs: validate
    runs-on: ubuntu-latest
    steps:
      - name: Merge PR
        env:
          GITEA_TOKEN: ${{ secrets.MERGE_TOKEN }}
        run: |
          PR_NUM=$(echo "${{ github.event.pull_request.number }}")
          REPO="${{ github.repository }}"
          API="http://143.198.27.163:3000/api/v1"

          echo "CI passed. Auto-merging PR #${PR_NUM}..."

          # Squash merge
          RESULT=$(curl -s -w "\n%{http_code}" -X POST \
            -H "Authorization: token ${GITEA_TOKEN}" \
            -H "Content-Type: application/json" \
            -d '{"Do":"squash","delete_branch_after_merge":true}' \
            "${API}/repos/${REPO}/pulls/${PR_NUM}/merge")

          HTTP_CODE=$(echo "$RESULT" | tail -1)
          BODY=$(echo "$RESULT" | head -n -1)

          if [ "$HTTP_CODE" = "200" ] || [ "$HTTP_CODE" = "405" ]; then
            echo "Merged successfully (or already merged)"
          else
            echo "Merge failed: HTTP ${HTTP_CODE}"
            echo "$BODY"
            # Don't fail the job — PR stays open for manual review
          fi