name: signals-evidence-locker
on:
  workflow_dispatch:
    inputs:
      out_dir:
        description: "Output directory containing signed artifacts"
        required: false
        default: "evidence-locker/signals/2025-12-05"
      allow_dev_key:
        description: "Allow dev key fallback (1=yes, 0=no)"
        required: false
        default: "0"
      retention_target:
        description: "Retention days target"
        required: false
        default: "180"

jobs:
  prepare-signals-evidence:
    runs-on: ubuntu-latest
    env:
      MODULE_ROOT: docs/modules/signals
      OUT_DIR: ${{ github.event.inputs.out_dir || 'evidence-locker/signals/2025-12-05' }}
      COSIGN_ALLOW_DEV_KEY: ${{ github.event.inputs.allow_dev_key || '0' }}
      COSIGN_PRIVATE_KEY_B64: ${{ secrets.COSIGN_PRIVATE_KEY_B64 }}
      COSIGN_PASSWORD: ${{ secrets.COSIGN_PASSWORD }}
      EVIDENCE_LOCKER_URL: ${{ secrets.EVIDENCE_LOCKER_URL || vars.EVIDENCE_LOCKER_URL }}
      CI_EVIDENCE_LOCKER_TOKEN: ${{ secrets.CI_EVIDENCE_LOCKER_TOKEN || vars.CI_EVIDENCE_LOCKER_TOKEN }}
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - 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 "$MODULE_ROOT"
          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: Build deterministic signals evidence tar
        run: |
          set -euo pipefail
          test -d "$MODULE_ROOT" || { echo "missing $MODULE_ROOT" >&2; exit 1; }

          tmpdir=$(mktemp -d)
          rsync -a --relative \
            "$OUT_DIR/SHA256SUMS" \
            "$OUT_DIR/confidence_decay_config.sigstore.json" \
            "$OUT_DIR/unknowns_scoring_manifest.sigstore.json" \
            "$OUT_DIR/heuristics_catalog.sigstore.json" \
            "$MODULE_ROOT/decay/confidence_decay_config.yaml" \
            "$MODULE_ROOT/unknowns/unknowns_scoring_manifest.json" \
            "$MODULE_ROOT/heuristics/heuristics.catalog.json" \
            "$tmpdir/"

          (cd "$tmpdir/$OUT_DIR" && sha256sum --check SHA256SUMS)

          tar --sort=name --mtime="UTC 1970-01-01" --owner=0 --group=0 --numeric-owner \
            -cf /tmp/signals-evidence.tar -C "$tmpdir" .

          sha256sum /tmp/signals-evidence.tar > /tmp/signals-evidence.tar.sha256

      - name: Upload artifact (fallback)
        uses: actions/upload-artifact@v4
        with:
          name: signals-evidence-2025-12-05
          path: |
            /tmp/signals-evidence.tar
            /tmp/signals-evidence.tar.sha256

      - name: Push to Evidence Locker
        if: ${{ env.CI_EVIDENCE_LOCKER_TOKEN != '' && env.EVIDENCE_LOCKER_URL != '' }}
        env:
          TOKEN: ${{ env.CI_EVIDENCE_LOCKER_TOKEN }}
          URL: ${{ env.EVIDENCE_LOCKER_URL }}
        run: |
          upload_path="${OUT_DIR#evidence-locker/}"
          curl -f -X PUT "$URL/${upload_path}/signals-evidence.tar" \
            -H "Authorization: Bearer $TOKEN" \
            --data-binary @/tmp/signals-evidence.tar

      - name: Skip push (missing secret or URL)
        if: ${{ env.CI_EVIDENCE_LOCKER_TOKEN == '' || env.EVIDENCE_LOCKER_URL == '' }}
        run: |
          echo "Locker push skipped: set CI_EVIDENCE_LOCKER_TOKEN and EVIDENCE_LOCKER_URL to enable." >&2