name: Signals Reachability Scoring & Events

on:
  workflow_dispatch:
    inputs:
      allow_dev_key:
        description: "Allow dev signing key fallback (1=yes, 0=no)"
        required: false
        default: "0"
      evidence_out_dir:
        description: "Evidence output dir for signing/upload"
        required: false
        default: "evidence-locker/signals/2025-12-05"
  push:
    branches: [ main ]
    paths:
      - 'src/Signals/**'
      - 'scripts/signals/reachability-smoke.sh'
      - '.gitea/workflows/signals-reachability.yml'
      - 'tools/cosign/sign-signals.sh'

jobs:
  reachability-smoke:
    runs-on: ubuntu-22.04
    env:
      DOTNET_NOLOGO: 1
      DOTNET_CLI_TELEMETRY_OPTOUT: 1
      DOTNET_SYSTEM_GLOBALIZATION_INVARIANT: 1
      TZ: UTC
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Task Pack offline bundle fixtures
        run: python3 scripts/packs/run-fixtures-check.sh

      - name: Setup .NET 10 RC
        uses: actions/setup-dotnet@v4
        with:
          dotnet-version: 10.0.100
          include-prerelease: true

      - name: Restore
        run: dotnet restore src/Signals/StellaOps.Signals.sln --configfile nuget.config

      - name: Build
        run: dotnet build src/Signals/StellaOps.Signals.sln -c Release --no-restore

      - name: Reachability scoring + cache/events smoke
        run: |
          chmod +x scripts/signals/reachability-smoke.sh
          scripts/signals/reachability-smoke.sh

  sign-and-upload:
    runs-on: ubuntu-22.04
    needs: reachability-smoke
    env:
      COSIGN_PRIVATE_KEY_B64: ${{ secrets.COSIGN_PRIVATE_KEY_B64 }}
      COSIGN_PASSWORD: ${{ secrets.COSIGN_PASSWORD }}
      COSIGN_ALLOW_DEV_KEY: ${{ github.event.inputs.allow_dev_key || '0' }}
      OUT_DIR: ${{ github.event.inputs.evidence_out_dir || 'evidence-locker/signals/2025-12-05' }}
      CI_EVIDENCE_LOCKER_TOKEN: ${{ secrets.CI_EVIDENCE_LOCKER_TOKEN || vars.CI_EVIDENCE_LOCKER_TOKEN }}
      EVIDENCE_LOCKER_URL: ${{ secrets.EVIDENCE_LOCKER_URL || vars.EVIDENCE_LOCKER_URL }}
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Task Pack offline bundle fixtures
        run: python3 scripts/packs/run-fixtures-check.sh

      - name: Install cosign
        uses: sigstore/cosign-installer@v3
        with:
          cosign-release: 'v2.2.4'

      - name: Check signing key configured
        run: |
          if [[ -z "$COSIGN_PRIVATE_KEY_B64" && "$COSIGN_ALLOW_DEV_KEY" != "1" ]]; then
            echo "::error::COSIGN_PRIVATE_KEY_B64 is missing and dev key fallback is disabled. Set COSIGN_PRIVATE_KEY_B64 (and COSIGN_PASSWORD if needed) or rerun with allow_dev_key=1 for smoke only."
            exit 1
          fi
          if [[ "$COSIGN_ALLOW_DEV_KEY" == "1" ]]; then
            echo "::notice::Using dev key for signing (allow_dev_key=1) - not suitable for production uploads."
          fi

      - name: Verify artifacts exist
        run: |
          cd docs/modules/signals
          sha256sum -c SHA256SUMS

      - name: Sign signals artifacts
        run: |
          chmod +x tools/cosign/sign-signals.sh
          OUT_DIR="${OUT_DIR}" tools/cosign/sign-signals.sh

      - name: Upload signed artifacts
        uses: actions/upload-artifact@v4
        with:
          name: signals-evidence-${{ github.run_number }}
          path: |
            ${{ env.OUT_DIR }}/*.sigstore.json
            ${{ env.OUT_DIR }}/*.dsse
            ${{ env.OUT_DIR }}/SHA256SUMS
          if-no-files-found: error
          retention-days: 30

      - name: Push to Evidence Locker
        if: ${{ env.CI_EVIDENCE_LOCKER_TOKEN != '' && env.EVIDENCE_LOCKER_URL != '' }}
        env:
          TOKEN: ${{ env.CI_EVIDENCE_LOCKER_TOKEN }}
          URL: ${{ env.EVIDENCE_LOCKER_URL }}
        run: |
          tar -cf /tmp/signals-evidence.tar -C "$OUT_DIR" .
          sha256sum /tmp/signals-evidence.tar
          curl -f -X PUT "$URL/signals/$(date -u +%Y-%m-%d)/signals-evidence.tar" \
            -H "Authorization: Bearer $TOKEN" \
            --data-binary @/tmp/signals-evidence.tar
          echo "Uploaded to Evidence Locker"

      - name: Evidence Locker skip notice
        if: ${{ env.CI_EVIDENCE_LOCKER_TOKEN == '' || env.EVIDENCE_LOCKER_URL == '' }}
        run: |
          echo "::notice::Evidence Locker upload skipped (CI_EVIDENCE_LOCKER_TOKEN or EVIDENCE_LOCKER_URL not set)"