name: "Showcase: Verify Deploy"

# Triggered after "Showcase: Build & Push" completes. Verifies that the
# STAGING redeploy from the build workflow actually produced healthy
# services. Push-to-main redeploys staging only. This workflow is the
# staging gate; verify-deploy.ts is the parameterized probe driven off
# showcase/scripts/railway-envs.ts (the SSOT).

on:
  workflow_run:
    workflows: ["Showcase: Build & Push"]
    types: [completed]
    branches: [main]
  workflow_dispatch:
    inputs:
      service:
        description: "Service to verify (SSOT key or dispatch_name; 'all' = everything probe-eligible)"
        required: false
        default: "all"
        type: string

concurrency:
  group: showcase-verify-deploy
  cancel-in-progress: true

permissions:
  contents: read

jobs:
  resolve-matrix:
    runs-on: ubuntu-latest
    timeout-minutes: 5
    permissions:
      contents: read
      actions: read
    if: >-
      github.event_name == 'workflow_dispatch' ||
      github.event.workflow_run.conclusion == 'success'
    outputs:
      services_csv: ${{ steps.matrix.outputs.services_csv }}
      has_services: ${{ steps.matrix.outputs.has_services }}
      build_run_id: ${{ github.event.workflow_run.id }}
      build_run_url: ${{ github.event.workflow_run.html_url }}
      redeploy_red: ${{ steps.redeploy-gate.outputs.redeploy_red }}
      ok_services: ${{ steps.redeploy-gate.outputs.ok_services }}
      failed_services: ${{ steps.redeploy-gate.outputs.failed_services }}
    steps:
      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
        with:
          persist-credentials: false
      - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
        with:
          node-version: 22.x

      - name: Check whether build uploaded a redeploy-summary artifact
        id: check-redeploy-summary
        # `actions/download-artifact@v4` with a `name:` HARD-FAILS when the
        # named artifact does not exist. The artifact legitimately does
        # NOT exist whenever the upstream build ran but redeployed nothing
        # — e.g. a push touching `showcase/**` that fires the build's
        # `paths:` filter, but `detect-changes` finds no buildable service
        # changed, so `redeploy-staging` is skipped and never uploads.
        # The build still concludes `success`, so this workflow fires on
        # `workflow_run` and `resolve-matrix` runs. Without this pre-check
        # the unguarded download would fail the job and (via
        # `enforce-redeploy-gate` tripping on `result == 'failure'`) flip
        # the whole deploy workflow RED — a false-red on a routine
        # showcase-docs/script-only change. Listing artifacts via the API
        # only requires `actions: read`, which `resolve-matrix` already has.
        if: github.event_name == 'workflow_run'
        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9
        with:
          script: |
            // Fail loud on API error: github-script propagates unhandled
            // rejections, which fails this step and (via the
            // resolve-matrix.result == 'failure' clause on
            // enforce-redeploy-gate) reds the workflow. Do NOT wrap this
            // in try/catch — silently defaulting summary_present=false on
            // a 5xx/403 would open the gate (skip verify) on what is
            // actually a transient API failure, hiding a broken pipeline.
            //
            // Use the `name` query-param on listWorkflowRunArtifacts to
            // ask the API to return only the redeploy-summary artifact.
            // This makes the lookup robust to the build run uploading
            // many artifacts (per-slot build-result-* + build-results +
            // redeploy-summary — already ~28 today, well within per_page
            // 100, but a future expansion past 100 would otherwise risk a
            // false "absent" if redeploy-summary fell off the first page).
            // The endpoint accepts `name` for an exact-match filter; we
            // still paginate defensively in case the API returns multiple
            // rows (e.g. an artifact with the same name re-uploaded).
            const runId = context.payload.workflow_run.id;
            const iterator = github.paginate.iterator(
              github.rest.actions.listWorkflowRunArtifacts,
              {
                owner: context.repo.owner,
                repo: context.repo.repo,
                run_id: runId,
                name: "redeploy-summary",
                per_page: 100,
              },
            );
            let present = false;
            for await (const page of iterator) {
              if ((page.data || []).some((a) => a.name === "redeploy-summary")) {
                present = true;
                break;
              }
            }
            core.setOutput("summary_present", present ? "true" : "false");
            core.info(`redeploy-summary present for run ${runId}: ${present}`);

      - name: Download redeploy summary from build workflow
        # Three cases now handled distinctly:
        #   (a) workflow_dispatch — no `workflow_run` payload exists; the
        #       download is skipped and the bash `[ ! -f "$SUMMARY" ]`
        #       branch below treats it as "nothing to gate" (correct: a
        #       manual dispatch is not gated by a build's per-service set).
        #   (b) workflow_run + artifact absent — the upstream build
        #       redeployed nothing (e.g. no service had buildable
        #       changes); the precheck reports `summary_present=false`,
        #       the download is skipped, and the bash branch no-ops the
        #       gate. The deploy workflow should NOT red here — there is
        #       nothing to gate.
        #   (c) workflow_run + artifact PRESENT — we always attempt the
        #       download. We intentionally do NOT set
        #       `continue-on-error: true`: if the artifact exists but the
        #       download genuinely fails (network/permission), silently
        #       opening the gate would let verify probe the FULL service
        #       set against stale `:latest` and mask a broken redeploy as
        #       a green deploy. Fail loud instead.
        if: >-
          github.event_name == 'workflow_run' &&
          steps.check-redeploy-summary.outputs.summary_present == 'true'
        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8
        with:
          name: redeploy-summary
          path: .redeploy
          run-id: ${{ github.event.workflow_run.id }}
          github-token: ${{ secrets.GITHUB_TOKEN }}

      - name: Gate on staging redeploy errors
        id: redeploy-gate
        run: |
          set -euo pipefail
          SUMMARY=".redeploy/summary.json"
          if [ ! -f "$SUMMARY" ]; then
            echo "No redeploy summary found (workflow_dispatch path or build did not upload). Skipping gate."
            {
              echo "redeploy_red=false"
              echo "ok_services="
              echo "failed_services="
            } >> "$GITHUB_OUTPUT"
            exit 0
          fi
          # Shape guard: redeploy-env.ts writes per-entry `status` of
          # exactly "ok" or "error". If the schema ever drifts (e.g.
          # `status`→`state`, `ok`→`success`) every `select(.status==...)`
          # silently yields empty → redeploy_red=false AND ok_services=""
          # → resolve-verify-matrix skips verify on a real unverified
          # redeploy = green CI on a broken release. Refuse the ambiguity:
          # if the file has entries but ANY entry is missing a valid
          # ok|error status (partial drift — some rows on the legacy schema,
          # some on the new one), fail loud here so enforce-redeploy-gate
          # reds the workflow (resolve-matrix.result == 'failure' fans into
          # the gate). The previous TOTAL>0 && WITH_STATUS==0 check was
          # all-or-nothing and silently dropped the drifted rows on a mixed
          # summary.
          TOTAL=$(jq 'length' "$SUMMARY")
          WITH_STATUS=$(jq '[.[] | select(.status == "ok" or .status == "error")] | length' "$SUMMARY")
          if [ "$TOTAL" -gt 0 ] && [ "$WITH_STATUS" -lt "$TOTAL" ]; then
            echo "::error::summary.json shape drift: $WITH_STATUS of $TOTAL entries have status ok|error"
            exit 1
          fi
          # Per spec §3: the workflow MUST turn red on any staging
          # status:"error", while verify still runs against the success-set.
          ERRORS=$(jq -c '[.[] | select(.status == "error")]' "$SUMMARY")
          ERROR_COUNT=$(echo "$ERRORS" | jq 'length')
          OK=$(jq -r '[.[] | select(.status == "ok") | .service] | join(",")' "$SUMMARY")
          FAILED=$(jq -r '[.[] | select(.status == "error") | .service] | join(",")' "$SUMMARY")
          echo "ok_services=$OK" >> "$GITHUB_OUTPUT"
          echo "failed_services=$FAILED" >> "$GITHUB_OUTPUT"
          if [ "$ERROR_COUNT" -gt 0 ]; then
            echo "::error::Staging redeploy reported $ERROR_COUNT per-service error(s):"
            echo "$ERRORS" | jq -r '.[] | "  - \(.service): \(.error)"'
            echo "redeploy_red=true" >> "$GITHUB_OUTPUT"
          else
            echo "redeploy_red=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Build verify matrix from SSOT
        id: matrix
        env:
          DISPATCH_SERVICE: ${{ github.event.inputs.service }}
          OK_FROM_REDEPLOY: ${{ steps.redeploy-gate.outputs.ok_services }}
          EVENT_NAME: ${{ github.event_name }}
          SUMMARY_PRESENT: ${{ steps.check-redeploy-summary.outputs.summary_present }}
        # The decision-table that picks the verify matrix lives in
        # showcase/scripts/resolve-verify-matrix.ts (pure function +
        # unit tests). Summary of cases:
        #   - workflow_dispatch + 'all'/empty  → full probe-eligible set.
        #   - workflow_dispatch + specific svc → just that service
        #                                        (unknown name → error exit).
        #   - workflow_run + summary_present=false → has_services=false
        #                                            (build redeployed nothing).
        #   - workflow_run + summary_present=true + ok empty
        #       → has_services=false (success-set empty; verify is skipped).
        #         In practice redeploy-env.ts only emits status ok|error,
        #         so this branch implies redeploy_red=true and
        #         enforce-redeploy-gate reds the workflow independently —
        #         skipping verify here is correct (no ok services left to
        #         probe; the gate has already turned the workflow red).
        #   - workflow_run + summary_present=true + ok non-empty
        #       → intersect ok_services (SSOT key OR dispatchName aliases)
        #         with probe.staging-eligible SSOT services. has_services
        #         reflects CSV emptiness. When the intersection collapses
        #         to empty, verify is skipped; if there were per-service
        #         errors, enforce-redeploy-gate reds the workflow — otherwise
        #         the run is correctly green (every redeploy succeeded, just
        #         none probe-eligible).
        run: npx tsx showcase/scripts/resolve-verify-matrix.ts

  verify:
    needs: [resolve-matrix]
    if: needs.resolve-matrix.outputs.has_services == 'true'
    runs-on: ubuntu-latest
    timeout-minutes: 20
    environment: railway
    permissions:
      contents: read
      actions: read
    steps:
      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7
        with:
          persist-credentials: false
      - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
        with:
          node-version: 22.x

      - name: Install
        working-directory: showcase/scripts
        run: npm ci

      - name: Run verify-deploy --env staging
        env:
          RAILWAY_TOKEN: ${{ secrets.RAILWAY_TOKEN }}
          SERVICES_CSV: ${{ needs.resolve-matrix.outputs.services_csv }}
        run: |
          if [ -z "$RAILWAY_TOKEN" ]; then
            echo "::error::RAILWAY_TOKEN is not set"
            exit 1
          fi
          npx tsx showcase/scripts/verify-deploy.ts --env staging --services "$SERVICES_CSV"

  enforce-redeploy-gate:
    # Spec §3: workflow turns red on any per-service redeploy error, even
    # if verify against the success-set passes. This job is independent of
    # verify so the user sees both signals (what was redeployed badly,
    # what was redeployed and is unhealthy) rather than one masking the other.
    needs: [resolve-matrix]
    # Trip the gate on EITHER a per-service redeploy error OR a complete
    # resolve-matrix failure. A resolve-matrix failure leaves the
    # `redeploy_red` output empty (jobs that fail mid-step don't publish
    # outputs reliably), which would otherwise let an upstream crash slip
    # past as "not red" — a silent bypass of the gate.
    if: always() && (needs.resolve-matrix.outputs.redeploy_red == 'true' || needs.resolve-matrix.result == 'failure')
    runs-on: ubuntu-latest
    timeout-minutes: 2
    permissions:
      contents: read
    steps:
      - name: Fail workflow on staging redeploy errors
        run: |
          echo "::error::One or more staging services reported status:error in the redeploy summary."
          echo "See the resolve-matrix job's 'Gate on staging redeploy errors' step for details."
          exit 1

  notify-harness:
    needs: [resolve-matrix, verify, enforce-redeploy-gate]
    if: always() && needs.resolve-matrix.outputs.has_services == 'true'
    permissions:
      contents: read
      actions: read
    runs-on: ubuntu-latest
    timeout-minutes: 3
    steps:
      - name: Compute deploy-result payload
        id: payload
        env:
          VERIFY_RESULT: ${{ needs.verify.result }}
          OK_SERVICES: ${{ needs.resolve-matrix.outputs.ok_services }}
          FAILED_SERVICES: ${{ needs.resolve-matrix.outputs.failed_services }}
          BUILD_RUN_ID: ${{ needs.resolve-matrix.outputs.build_run_id }}
          BUILD_RUN_URL: ${{ needs.resolve-matrix.outputs.build_run_url }}
          RUN_ID: ${{ github.run_id }}
          RUN_URL: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
        # Build the payload to match the harness ingest schema at
        # showcase/harness/src/http/webhooks/deploy.ts (`.strict()`):
        #   {runId, runUrl, buildRunId?, buildRunUrl?, services[], succeeded[], failed[], cancelled}
        # No `state` key — the schema rejects unknown fields. State is
        # derived downstream from (failed.length, cancelled, succeeded).
        #   - succeeded = ok_services from the redeploy gate
        #   - failed    = failed_services from the redeploy gate
        #   - services  = union (full attempted set, per deploy.ts:307)
        #   - cancelled = verify job conclusion == "cancelled"
        # jq -R/split handles empty CSV → [] safely.
        run: |
          set -euo pipefail
          # `echo` (not printf '%s') so empty CSV → newline → jq -R reads
          # an empty record → split produces [""] → filter to []. Without
          # the trailing newline jq sees no records and --argjson barfs
          # on the empty string.
          SUCCEEDED=$(echo "${OK_SERVICES:-}" | jq -R 'split(",") | map(select(length>0))')
          FAILED=$(echo "${FAILED_SERVICES:-}" | jq -R 'split(",") | map(select(length>0))')
          if [ "$VERIFY_RESULT" = "cancelled" ]; then
            CANCELLED="true"
          else
            CANCELLED="false"
          fi
          # buildRunId/buildRunUrl are .url()-validated in the harness
          # Zod schema, so we must omit them entirely when empty rather
          # than emit "" (which fails .url()). Same for runUrl: only
          # emit it if non-empty (it's optional in the schema). The base
          # object always carries runId + succeeded/failed/services/cancelled;
          # we conditionally splice in the optional keys.
          PAYLOAD=$(jq -cn \
            --arg runId "$RUN_ID" --arg runUrl "${RUN_URL:-}" \
            --arg buildRunId "${BUILD_RUN_ID:-}" --arg buildRunUrl "${BUILD_RUN_URL:-}" \
            --argjson succeeded "$SUCCEEDED" \
            --argjson failed "$FAILED" \
            --argjson cancelled "$CANCELLED" \
            '
            {
              runId: $runId,
              services: ($succeeded + $failed | unique),
              succeeded: $succeeded,
              failed: $failed,
              cancelled: $cancelled
            }
            + (if $runUrl == "" then {} else {runUrl: $runUrl} end)
            + (if $buildRunId == "" then {} else {buildRunId: $buildRunId} end)
            + (if $buildRunUrl == "" then {} else {buildRunUrl: $buildRunUrl} end)
            ')
          {
            echo "payload<<EOF_PAYLOAD"
            echo "$PAYLOAD"
            echo "EOF_PAYLOAD"
          } >> "$GITHUB_OUTPUT"

      - name: POST deploy result to showcase-harness
        env:
          SHOWCASE_HARNESS_URL: ${{ secrets.SHOWCASE_HARNESS_URL }}
          SHARED_SECRET: ${{ secrets.SHOWCASE_HARNESS_SHARED_SECRET }}
          PAYLOAD: ${{ steps.payload.outputs.payload }}
        run: |
          set -euo pipefail
          if [ -z "${SHOWCASE_HARNESS_URL:-}" ] || [ -z "${SHARED_SECRET:-}" ]; then
            echo "::warning::SHOWCASE_HARNESS_URL or SHOWCASE_HARNESS_SHARED_SECRET not set; skipping webhook"
            exit 0
          fi
          TS=$(date +%s)
          BODY_SHA=$(printf '%s' "$PAYLOAD" | openssl dgst -sha256 -hex | awk '{print $2}')
          CANONICAL="POST|/webhooks/deploy|${TS}|${BODY_SHA}"
          SIG=$(printf '%s' "$CANONICAL" | openssl dgst -sha256 -hmac "$SHARED_SECRET" -hex | awk '{print $2}')
          curl -sS --fail-with-body \
            -X POST "${SHOWCASE_HARNESS_URL%/}/webhooks/deploy" \
            -H 'content-type: application/json' \
            -H "X-Ops-Timestamp: ${TS}" \
            -H "X-Ops-Signature: sha256=${SIG}" \
            --data-raw "$PAYLOAD"