name: "[Check] Project/Issue Assignment"

on:
  pull_request:
    types:
      - opened
      - ready_for_review
      - labeled
      - synchronize

concurrency:
  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
  cancel-in-progress: true

jobs:
  check-project-or-issue:
    runs-on: ubuntu-latest
    steps:
      - name: Generate GitHub App token
        id: trezor-bot-token
        uses: actions/create-github-app-token@v1
        with:
          app-id: ${{ secrets.TREZOR_BOT_APP_ID }}
          private-key: ${{ secrets.TREZOR_BOT_PRIVATE_KEY }}

      - name: Checkout
        uses: actions/checkout@v4
      - name: Check if PR is assigned to a project or an issue
        env:
          GITHUB_TOKEN: ${{ steps.trezor-bot-token.outputs.token }}
        run: |
          # Fetch PR labels
          PR_LABELS=$(gh pr view ${{ github.event.pull_request.number }} --json labels --jq '.labels[].name')

          # Check for "no-project" label
          if echo "$PR_LABELS" | grep -q "^no-project$"; then
            echo "Pass: The PR has the 'no-project' label."
            exit 0
          fi

          # Check for linked issues using GraphQL
          LINKED_ISSUES=$(gh api graphql -f query='
          query($owner: String!, $repo: String!, $number: Int!) {
            repository(owner: $owner, name: $repo) {
              pullRequest(number: $number) {
                closingIssuesReferences(first: 10) {
                  nodes {
                    id
                  }
                }
              }
            }
          }' -F owner=${{ github.repository_owner }} -F repo=${{ github.event.repository.name }} -F number=${{ github.event.pull_request.number }} --jq '.data.repository.pullRequest.closingIssuesReferences.nodes | length')

          if [ "$LINKED_ISSUES" -gt 0 ]; then
            echo "Pass: The PR is linked to $LINKED_ISSUES issue(s)."
            exit 0
          fi

          # Check for associated projects
          PROJECT_COUNT=$(gh pr view ${{ github.event.pull_request.number }} --json projectItems --jq '.projectItems | length')

          if [ "$PROJECT_COUNT" -gt 0 ]; then
            echo "Pass: This PR is assigned to a project."
            exit 0
          fi

          # If no condition passes
          echo "Error: This PR is not assigned to any project, not linked to a valid issue, and does not have the 'no-project' label."
          echo "Please assign the PR to a project or link it to an issue. Alternatively, add the 'no-project' label if not applicable."
          exit 1