# Auto-close issues that bypass or ignore the issue template checkboxes.
#
# GitHub issue forms enforce `required: true` checkboxes in the web UI,
# but the API bypasses form validation entirely — bots/scripts can open
# issues with every box unchecked or skip the template altogether.
#
# Rules:
#   0. No issue type -> close unless author is an org member
#   1. No checkboxes at all -> close unless author is an org member or bot
#   2. Checkboxes present but none checked -> close
#   3. "Submission checklist" section incomplete -> close
#   4. "Package (Required)" section has no selection -> close
#
# Org membership check reuses the shared helper from pr-labeler.js and
# the same GitHub App used by tag-external-issues.yml.

name: Close Unchecked Issues

on:
  issues:
    types: [opened]

permissions:
  contents: read

concurrency:
  group: ${{ github.workflow }}-${{ github.event.issue.number }}
  cancel-in-progress: true

jobs:
  check-boxes:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      issues: write

    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6

      - name: Generate GitHub App token
        id: app-token
        uses: actions/create-github-app-token@bcd2ba49218906704ab6c1aa796996da409d3eb1 # v3
        with:
          app-id: ${{ secrets.ORG_MEMBERSHIP_APP_ID }}
          private-key: ${{ secrets.ORG_MEMBERSHIP_APP_PRIVATE_KEY }}

      - name: Validate issue checkboxes
        if: steps.app-token.outcome == 'success'
        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
        with:
          github-token: ${{ steps.app-token.outputs.token }}
          script: |
            const { owner, repo } = context.repo;
            const issue_number = context.payload.issue.number;
            const body = context.payload.issue.body ?? '';
            const allChecked = (body.match(/- \[x\]/gi) || []).length;
            const allUnchecked = (body.match(/- \[ \]/g) || []).length;
            const total = allChecked + allUnchecked;

            // ── Helpers ─────────────────────────────────────────────────
            // Extract checkboxes under a markdown H2/H3 heading.
            // Returns { checked, unchecked } counts, or null if the
            // section heading is not found in the body.
            function parseSection(heading) {
              const escaped = heading.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
              // Find the heading line
              const headingRe = new RegExp(`^#{2,3}\\s+${escaped}\\s*$`, 'm');
              const headingMatch = headingRe.exec(body);
              if (!headingMatch) return null;
              // Slice from after the heading to the next heading or end
              const rest = body.slice(headingMatch.index + headingMatch[0].length);
              const nextHeading = rest.search(/\n#{2,3}\s/);
              const block = nextHeading === -1 ? rest : rest.slice(0, nextHeading);
              return {
                checked: (block.match(/- \[x\]/gi) || []).length,
                unchecked: (block.match(/- \[ \]/g) || []).length,
              };
            }

            let _cachedMember;
            async function isOrgMember() {
              if (_cachedMember) return _cachedMember;
              const { h } = require('./.github/scripts/pr-labeler.js')
                .loadAndInit(github, owner, repo, core);
              const author = context.payload.sender.login;
              const { isExternal } = await h.checkMembership(
                author, context.payload.sender.type,
              );
              _cachedMember = { internal: !isExternal, author };
              return _cachedMember;
            }

            async function closeWithComment(lines) {
              const templateUrl = `https://github.com/${owner}/${repo}/issues/new/choose`;
              lines.push(
                '',
                `Please use one of the [issue templates](${templateUrl}).`,
              );

              // Post comment first so the author sees the reason even if
              // the subsequent close call fails.
              await github.rest.issues.createComment({
                owner, repo, issue_number,
                body: lines.join('\n'),
              });

              await github.rest.issues.update({
                owner, repo, issue_number,
                state: 'closed',
                state_reason: 'not_planned',
              });
            }

            // ── Rule 0: no issue type (API/CLI bypass) ──────────────────
            // Issue types are set automatically when using web UI templates.
            // External users cannot set issue types via the API (requires
            // write/triage permissions), so a missing type reliably indicates
            // programmatic submission.
            if (!context.payload.issue.type) {
              let membership;
              try {
                membership = await isOrgMember();
              } catch (e) {
                // Org membership check failed — skip Rule 0 and let
                // Rules 1-4 handle validation via checkboxes.
                core.warning(`Rule 0: org membership check failed, skipping: ${e.message}`);
              }
              if (membership?.internal) {
                console.log(`No issue type, but ${membership.author} is internal — OK`);
              } else if (membership) {
                console.log(`No issue type and ${membership.author} is external — closing`);
                await closeWithComment([
                  'This issue was automatically closed because it appears to have been submitted programmatically — issue types are automatically set when using the GitHub web interface, and this issue has none.',
                  '',
                  'We do not allow automated issue submission at this time.',
                ]);
                return;
              }
            }

            // ── Rule 1: no checkboxes at all ────────────────────────────
            if (total === 0) {
              const { internal, author } = await isOrgMember();
              if (internal) {
                console.log(`No checkboxes, but ${author} is internal — OK`);
                return;
              }
              console.log(`No checkboxes and ${author} is external — closing`);
              await closeWithComment([
                'This issue was automatically closed because no issue template was used.',
              ]);
              return;
            }

            // ── Rule 2: checkboxes present but none checked ─────────────
            if (allChecked === 0) {
              console.log(`${allUnchecked} checkbox(es) present, none checked — closing`);
              await closeWithComment([
                'This issue was automatically closed because none of the required checkboxes were checked. Please re-file using an issue template and complete the checklist.',
              ]);
              return;
            }

            // ── Rules 3–4: parse sections for targeted feedback ─────────
            const checklist = parseSection('Submission checklist');
            const pkg = parseSection('Package (Required)');
            console.log(`Section parse — checklist: ${JSON.stringify(checklist)}, pkg: ${JSON.stringify(pkg)}`);

            const problems = [];

            if (checklist && checklist.unchecked > 0) {
              problems.push(
                'the submission checklist is incomplete — please confirm you searched for duplicates, included a reproduction, etc.'
              );
            }
            if (pkg !== null && pkg.checked === 0) {
              problems.push(
                'no package was selected (e.g. langchain-core, langchain, langgraph) — this helps us route the issue to the right team'
              );
            } else if (pkg === null) {
              problems.push(
                'the package selection is missing (e.g. langchain-core, langchain, langgraph) — this helps us route the issue to the right team'
              );
            }

            if (problems.length === 0) {
              console.log(`All section checks passed (${allChecked} checked) — OK`);
              return;
            }

            console.log(`Closing — problems: ${problems.join('; ')}`);
            await closeWithComment([
              'Thanks for opening an issue! It was automatically closed because:',
              '',
              ...problems.map(p => `- ${p}`),
            ]);
