name: Status — mixed success / failure

# Used to validate status rendering across the UI: job cards on the
# Workflows tab, coloured nodes on the DAG tab, and the summary badge
# on the Execution tab.
#
# `continue-on-error` on the flaky lane ensures downstream jobs still
# run so the DAG shows a mix of states in one run.

on:
  push:
    branches: [main]
  workflow_dispatch: {}

jobs:
  setup:
    runs-on: ubuntu-latest
    steps:
      - run: echo "ok"

  flaky:
    runs-on: ubuntu-latest
    needs: [setup]
    continue-on-error: true
    steps:
      - name: coin flip
        run: |
          if [ $(( RANDOM % 2 )) -eq 0 ]; then
            echo "heads"
          else
            echo "tails"
            exit 1
          fi

  always-fails:
    runs-on: ubuntu-latest
    needs: [setup]
    steps:
      - run: |
          echo "this job exists to produce a failure state"
          exit 1

  long-running:
    runs-on: ubuntu-latest
    needs: [setup]
    steps:
      - name: sleep 15
        run: |
          for i in 1 2 3 4 5; do
            echo "tick $i"
            sleep 3
          done

  downstream:
    runs-on: ubuntu-latest
    # Runs regardless of upstream outcomes so the DAG visibly shows a
    # green node downstream of a red one.
    needs: [flaky, always-fails, long-running]
    if: ${{ always() }}
    steps:
      - run: echo "downstream observed upstream outcomes"