name: Cache Verify

on:
  workflow_dispatch:

jobs:
  cache-verify:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      # 1) Show what cache/runtimes URLs the runner injected into this job
      - name: Print cache environment
        run: |
          echo "ACTIONS_CACHE_URL=${ACTIONS_CACHE_URL}"
          echo "ACTIONS_RUNTIME_URL=${ACTIONS_RUNTIME_URL}"

      # 2) Ping the cache status endpoint (works with either host IP or service name)
      - name: Probe cache server
        run: |
          URL="${ACTIONS_CACHE_URL%/}/_apis/artifactcache/status"
          echo "Checking: $URL"
          if command -v curl >/dev/null 2>&1; then
            curl -fsS "$URL"
          else
            wget -qO- "$URL"
          fi

      # 3) Use the cache action with a stable key
      #    - First run => MISS (will SAVE at the end)
      #    - Second run => HIT
      - name: Use actions/cache
        uses: actions/cache@v3
        with:
          path: ~/.cache/demo
          key: cache-verify-${{ runner.os }}-v1

      # 4) Write a marker file so we can see reuse across runs
      - name: Write marker
        run: |
          mkdir -p ~/.cache/demo
          date -u +"%Y-%m-%dT%H:%M:%SZ" > ~/.cache/demo/when.txt
          echo "Wrote: $(cat ~/.cache/demo/when.txt)"

      # 5) Read marker (on a cache HIT, this value will be from the previous run)
      - name: Read marker
        run: |
          echo "Marker content:"
          cat ~/.cache/demo/when.txt || echo "<missing>"