name: Compare Pricing Data

on:
  schedule:
    - cron: '0 18 * * *'

permissions:
  contents: read

jobs:
  compare-usd:
    runs-on: ubuntu-latest
    outputs:
      exit_code: ${{ steps.compare.outputs.exit_code }}
    steps:
      - uses: actions/checkout@v6.0.2

      - name: Install Go
        uses: actions/setup-go@v6
        with:
          go-version: 'stable'

      - name: Go Mod cache
        uses: actions/cache@v5
        with:
          path: |
            ~/.cache/go-build
            ~/go/pkg/mod
          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}

      - name: Compare USD pricing data
        id: compare
        working-directory: modules/pricing/public/cmd
        env:
          GCP_API_KEY: ${{ secrets.GCP_API_KEY }}
        # Capture the exit code before the shell exits so downstream steps can
        # distinguish drift (2) from a generation/infra error (1).
        run: |
          set +e
          go run . --currency USD --compare
          CODE=$?
          echo "exit_code=$CODE" >> $GITHUB_OUTPUT
          exit $CODE

  compare-cny:
    runs-on: ubuntu-latest
    outputs:
      exit_code: ${{ steps.compare.outputs.exit_code }}
    steps:
      - uses: actions/checkout@v6.0.2

      - name: Install Go
        uses: actions/setup-go@v6
        with:
          go-version: 'stable'

      - name: Go Mod cache
        uses: actions/cache@v5
        with:
          path: |
            ~/.cache/go-build
            ~/go/pkg/mod
          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}

      - name: Compare CNY pricing data
        id: compare
        working-directory: modules/pricing/public/cmd
        # CNY does not use GCP so no API key needed
        run: |
          set +e
          go run . --currency CNY --compare
          CODE=$?
          echo "exit_code=$CODE" >> $GITHUB_OUTPUT
          exit $CODE

  notify-drift:
    runs-on: ubuntu-latest
    needs: [compare-usd, compare-cny]
    if: |
      always() &&
      (needs.compare-usd.outputs.exit_code == '2' || needs.compare-cny.outputs.exit_code == '2')
    steps:
      - name: Notify Slack — pricing drift
        uses: slackapi/slack-github-action@v2
        with:
          method: chat.postMessage
          token: ${{ secrets.SLACK_BOT_TOKEN }}
          payload: |
            channel: ${{ secrets.SLACK_PRICING_CHANNEL_ID }}
            text: ":warning: Pricing data drift detected :warning:"
            blocks:
              - type: section
                text:
                  type: mrkdwn
                  text: ":warning: *Pricing data drift detected*\nUSD: ${{ needs.compare-usd.outputs.exit_code == '2' && 'drifted :x:' || 'ok :white_check_mark:' }} | CNY: ${{ needs.compare-cny.outputs.exit_code == '2' && 'drifted :x:' || 'ok :white_check_mark:' }}\nThe live cloud provider pricing no longer matches the committed <https://github.com/${{ github.repository }}/tree/${{ github.ref_name }}/modules/pricing/public|pricing-data.json>.\n*Workflow:* <${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}|View run>"