name: Sync Labels to Project Board

# Fires when a board: or priority: label is added/removed (or an issue closes).
# Maps labels -> Project V2 board fields (OffbandMesh org project #2) via GraphQL,
# so agents never call `gh project` commands directly.
# Adapted from the DifferentWire/Unfocused canonical (GH #59 board backfill).
#
# Requires repo secret PROJECT_PAT: a classic PAT with `project` + `repo` scope
# (the default GITHUB_TOKEN cannot write an org-level project).

on:
  issues:
    types: [labeled, unlabeled, closed]

jobs:
  # -- Auto-label closed issues board:done (mutual-exclusion cleanup) --
  auto-label-closed:
    runs-on: ubuntu-latest
    permissions:
      issues: write
    if: github.event.action == 'closed'
    steps:
      - name: Auto-label closed issues
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          GH_REPO: ${{ github.repository }}
        run: |
          labels=$(gh issue view ${{ github.event.issue.number }} --json labels -q '.labels[].name')
          if ! echo "$labels" | grep -q "board:done"; then
            gh issue edit ${{ github.event.issue.number }} --add-label "board:done"
          else
            stale=$(echo "$labels" | grep '^board:' | grep -v '^board:done$' || true)
            if [ -n "$stale" ]; then
              for lbl in $stale; do
                gh issue edit ${{ github.event.issue.number }} --remove-label "$lbl"
              done
              gh issue edit ${{ github.event.issue.number }} --remove-label "board:done"
              gh issue edit ${{ github.event.issue.number }} --add-label "board:done"
            fi
          fi

  # -- Sync board/priority labels to project fields --
  sync:
    runs-on: ubuntu-latest
    if: >-
      (github.event.action == 'labeled' || github.event.action == 'unlabeled') && (
      startsWith(github.event.label.name, 'board:') ||
      startsWith(github.event.label.name, 'priority:')
      )
    steps:
      - name: Sync label to project board
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.PROJECT_PAT }}
          script: |
            // -- Project field IDs (OffbandMesh org project #2) --
            const PROJECT_ID = 'PVT_kwDOEXsS3c4BaleY';

            const STATUS_FIELD_ID = 'PVTSSF_lADOEXsS3c4BaleYzhVcBOA';
            const STATUS_OPTIONS = {
              'board:backlog':     '74e6ff08',
              'board:todo':        'd85ffaa6',
              'board:ready':       'e23e8854',
              'board:in-progress': 'a406c68f',
              'board:testing':     'ead78e5a',
              'board:deferred':    '0bb62da8',
              'board:done':        '72944195',
            };

            const PRIORITY_FIELD_ID = 'PVTSSF_lADOEXsS3c4BaleYzhVcBUc';
            const PRIORITY_OPTIONS = {
              'priority:P0': '59562f1e',
              'priority:P1': 'a76f6d06',
              'priority:P2': '2b16020d',
              'priority:P3': 'd5740bf3',
            };

            const action = context.payload.action;
            const triggerLabel = context.payload.label.name;
            const issueNumber = context.payload.issue.number;
            const issueNodeId = context.payload.issue.node_id;
            const issueLabels = context.payload.issue.labels.map(l => l.name);

            core.info(`Action "${action}" label "${triggerLabel}" on #${issueNumber}`);

            let triggerPrefix;
            if (triggerLabel.startsWith('board:'))    triggerPrefix = 'board:';
            else if (triggerLabel.startsWith('priority:')) triggerPrefix = 'priority:';
            else {
              core.info('Not a board/priority label — skipping');
              return;
            }

            if (action === 'unlabeled') {
              const options = triggerPrefix === 'board:' ? STATUS_OPTIONS : PRIORITY_OPTIONS;
              const surviving = issueLabels.find(l => options[l]);
              if (!surviving) {
                core.info(`No remaining ${triggerPrefix} label — nothing to sync`);
                return;
              }
              core.info(`Unlabeled "${triggerLabel}", surviving: "${surviving}" — syncing`);
            }

            if (action === 'labeled') {
              const conflicting = issueLabels.filter(
                l => l.startsWith(triggerPrefix) && l !== triggerLabel
              );
              for (const oldLabel of conflicting) {
                try {
                  await github.rest.issues.removeLabel({
                    owner: context.repo.owner,
                    repo: context.repo.repo,
                    issue_number: issueNumber,
                    name: oldLabel,
                  });
                  core.info(`Removed conflicting label: ${oldLabel}`);
                } catch (e) {
                  core.warning(`Could not remove label "${oldLabel}": ${e.message}`);
                }
              }
            }

            const addMutation = `
              mutation($projectId: ID!, $contentId: ID!) {
                addProjectV2ItemById(input: {
                  projectId: $projectId
                  contentId: $contentId
                }) {
                  item { id }
                }
              }
            `;

            let itemId;
            try {
              const addResult = await github.graphql(addMutation, {
                projectId: PROJECT_ID,
                contentId: issueNodeId,
              });
              itemId = addResult.addProjectV2ItemById.item.id;
              core.info(`Project item: ${itemId}`);
            } catch (e) {
              core.setFailed(`Failed to add #${issueNumber} to project: ${e.message}`);
              return;
            }

            const updateMutation = `
              mutation($projectId: ID!, $itemId: ID!, $fieldId: ID!, $optionId: String!) {
                updateProjectV2ItemFieldValue(input: {
                  projectId: $projectId
                  itemId: $itemId
                  fieldId: $fieldId
                  value: { singleSelectOptionId: $optionId }
                }) {
                  projectV2Item { id }
                }
              }
            `;

            const boardLabel = triggerPrefix === 'board:'
              ? (action === 'labeled'
                  ? triggerLabel
                  : issueLabels.find(l => STATUS_OPTIONS[l]))
              : issueLabels.find(l => l.startsWith('board:') && STATUS_OPTIONS[l]);
            const priorityLabel = triggerPrefix === 'priority:'
              ? (action === 'labeled'
                  ? triggerLabel
                  : issueLabels.find(l => PRIORITY_OPTIONS[l]))
              : issueLabels.find(l => l.startsWith('priority:') && PRIORITY_OPTIONS[l]);

            if (boardLabel) {
              try {
                await github.graphql(updateMutation, {
                  projectId: PROJECT_ID,
                  itemId: itemId,
                  fieldId: STATUS_FIELD_ID,
                  optionId: STATUS_OPTIONS[boardLabel],
                });
                core.info(`Status -> ${boardLabel}`);
              } catch (e) {
                core.setFailed(`Failed to set status: ${e.message}`);
              }
            }

            if (priorityLabel) {
              try {
                await github.graphql(updateMutation, {
                  projectId: PROJECT_ID,
                  itemId: itemId,
                  fieldId: PRIORITY_FIELD_ID,
                  optionId: PRIORITY_OPTIONS[priorityLabel],
                });
                core.info(`Priority -> ${priorityLabel}`);
              } catch (e) {
                core.setFailed(`Failed to set priority: ${e.message}`);
              }
            }

            core.info(`Done syncing #${issueNumber}`);