name: Label non-Gittensor PRs

on:
  pull_request_target:
    types:
      - opened
      - reopened

permissions:
  pull-requests: write

jobs:
  label-pr:
    runs-on: ubuntu-latest
    steps:
      - name: Add not-gittensor label for matched authors
        uses: actions/github-script@v7
        env:
          GITTENSOR_USERS: ${{ vars.GITTENSOR_USERS || '[]' }}
          GITTENSOR_EXCEPTIONS: ${{ vars.GITTENSOR_EXCEPTIONS || '[]' }}
          TARGET_LABEL: not-gittensor
        with:
          script: |
            const parseList = (raw, name) => {
              try {
                const parsed = JSON.parse(raw || '[]');
                if (!Array.isArray(parsed)) {
                  core.setFailed(`${name} must be a JSON array.`);
                  return [];
                }
                return parsed.map((value) => String(value).toLowerCase());
              } catch (error) {
                core.setFailed(`Failed to parse ${name}: ${error.message}`);
                return [];
              }
            };

            const author = context.payload.pull_request.user.login.toLowerCase();
            const users = new Set(parseList(process.env.GITTENSOR_USERS, 'GITTENSOR_USERS'));
            const exceptions = new Set(parseList(process.env.GITTENSOR_EXCEPTIONS, 'GITTENSOR_EXCEPTIONS'));

            if (!users.has(author) || exceptions.has(author)) {
              core.info(`No label needed for @${author}.`);
              return;
            }

            const existingLabels = context.payload.pull_request.labels.map((label) => label.name);
            if (existingLabels.includes(process.env.TARGET_LABEL)) {
              core.info(`Label ${process.env.TARGET_LABEL} already present.`);
              return;
            }

            await github.rest.issues.addLabels({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.payload.pull_request.number,
              labels: [process.env.TARGET_LABEL],
            });

            core.info(`Added ${process.env.TARGET_LABEL} to PR #${context.payload.pull_request.number}.`);