name: Pick runner

on:
  workflow_call:
    outputs:
      labels:
        value: ${{ jobs.pick.outputs.labels }}
    secrets:
      RUNNER_STATUS_TOKEN:
        required: false

permissions: {}

jobs:
  pick:
    name: Pick runner
    runs-on: ubuntu-24.04
    timeout-minutes: 2
    outputs:
      labels: ${{ steps.runner.outputs.labels || '"ubuntu-24.04"' }}
    steps:
      - name: Pick the compile runner
        id: runner
        if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository
        continue-on-error: true
        env:
          GH_TOKEN: ${{ secrets.RUNNER_STATUS_TOKEN }}
        run: |
          set -euo pipefail
          labels='"ubuntu-24.04"'
          if [ -n "$GH_TOKEN" ]; then
            idle=$(gh api "orgs/${GITHUB_REPOSITORY_OWNER}/actions/runners" --jq '[.runners[] | select(.status == "online" and .busy == false and any(.labels[]; .name == "droiddeck-ws"))] | length' 2>/dev/null || echo 0)
            if [ "${idle:-0}" -gt 0 ]; then
              labels='["self-hosted","droiddeck-ws"]'
            fi
          fi
          echo "labels=$labels" >> "$GITHUB_OUTPUT"
          echo "Compile runner: \`$labels\`" >> "$GITHUB_STEP_SUMMARY"