name: CI Cache Verification

on:
  push:
    paths:
      - '.github/workflows/cache-verify.yml'
  workflow_dispatch:

jobs:
  test-cache:
    name: Verify Node Modules Cache
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4

      - name: Setup Node
        uses: actions/setup-node@v4
        with:
          node-version: '20'

      - name: Generate cache key
        id: cache-key
        run: echo "key=node-modules-${{ runner.os }}-${{ env.LOCK_HASH }}" >> $GITHUB_OUTPUT
        env:
          LOCK_HASH: ${{ hashFiles('backend/yarn.lock', 'webapp/yarn.lock') }}

      - name: Show lockfile hashes (debug)
        run: |
          echo "backend/yarn.lock hash: ${{ hashFiles('backend/yarn.lock') }}"
          echo "webapp/yarn.lock hash: ${{ hashFiles('webapp/yarn.lock') }}"

      - name: Restore node_modules cache
        id: restore-cache
        uses: actions/cache@v4
        with:
          path: |
            backend/node_modules
            webapp/node_modules
          key: ${{ steps.cache-key.outputs.key }}
          restore-keys: |
            node-modules-${{ runner.os }}-
            node-modules-

      - name: Show cache hit status
        run: |
          if [[ "${{ steps.restore-cache.outputs.cache-hit }}" == "true" ]]; then
            echo "✅ Cache was hit!"
          else
            echo "❌ Cache was missed."
          fi

      - name: Install backend deps
        run: |
          cd backend
          yarn install
          yarn build

      - name: Install webapp deps
        run: |
          cd webapp
          yarn install
          yarn build

      - name: Start webapp (static or fallback)
        run: |
          if [ -d "webapp/out" ]; then
            echo "Serving webapp/out statically..."
            npx serve -s webapp/out -l 3000 &
          else
            echo "webapp/out not found – falling back to yarn start..."
            cd webapp
            yarn start &
          fi

      - name: Test HTTP wait logic
        run: |
          echo "Waiting for http://localhost:3000 to respond..."
          for i in {1..15}; do
            curl -sf http://localhost:3000 && echo "✅ Service ready." && exit 0
            echo "Attempt $i failed. Retrying..."
            sleep 2
          done
          echo "❌ Service did not respond in time." && exit 1