# svcforge CI.
#
# The contract, in one line: merge to master -> three images built and scanned -> the
# chart's image digests bumped -> ArgoCD syncs. CI never touches the cluster. There is no
# kubeconfig here and there must never be one; the pipeline's last act is a git commit.
#
# Rules this file exists to enforce:
#   - Build once, promote the artifact. The digest that trivy scanned is the digest that
#     lands in values.yaml is the digest that runs.
#   - Deploy by digest, never a mutable tag.
#   - Everything pinned: actions by SHA, tool images by digest, deps by uv.lock + --frozen.
#   - Every gate required. None advisory. Fail the PR, not prod.
#
# Stage order is deliberate and matches the module: cheapest and most likely to fail first,
# so a formatting mistake costs 20 seconds instead of three minutes of image builds.

name: ci

on: [pull_request, push]

concurrency:
  # A second push to the same branch makes the first run's answer irrelevant. Cancel it —
  # except on master, where the run ends in a commit and must not be interrupted midway.
  group: ci-${{ github.ref }}
  cancel-in-progress: ${{ github.ref != 'refs/heads/master' }}

env:
  REGISTRY: gitea.oci-oci.duckdns.org
  IMAGE_NS: gitea_admin
  UV_VERSION: "0.5.11"

jobs:
  # --- stage 1: lint -- fast, fails first ---------------------------------------------
  lint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
      - uses: astral-sh/setup-uv@38f3f104447c67c051c4a08e39b64a148898af3a # v4.2.0
        with:
          version: ${{ env.UV_VERSION }}
          enable-cache: true
          # The uv store is keyed on the lockfile: same lock, same wheels, cache hit.
          cache-dependency-glob: uv.lock
      - run: uv sync --frozen
      - name: ruff
        run: uv run ruff check . && uv run ruff format --check .

  # --- stage 2: types -- your compiler ------------------------------------------------
  types:
    runs-on: ubuntu-latest
    needs: [lint]
    steps:
      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
      - uses: astral-sh/setup-uv@38f3f104447c67c051c4a08e39b64a148898af3a # v4.2.0
        with:
          version: ${{ env.UV_VERSION }}
          enable-cache: true
          cache-dependency-glob: uv.lock
      - run: uv sync --frozen
      - name: mypy --strict
        run: uv run mypy --strict .

  # --- stage 3: unit -- domain only, milliseconds, coverage gate -----------------------
  unit:
    runs-on: ubuntu-latest
    needs: [lint]
    steps:
      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
      - uses: astral-sh/setup-uv@38f3f104447c67c051c4a08e39b64a148898af3a # v4.2.0
        with:
          version: ${{ env.UV_VERSION }}
          enable-cache: true
          cache-dependency-glob: uv.lock
      - run: uv sync --frozen
      - name: pytest unit
        # The gate is on domain/ alone, and only domain/. It is pure, has no I/O, and needs
        # no mocks — there is no excuse for a gap there. Pointing this at the whole repo
        # would let untested SQL be paid for by well-tested pure functions.
        #
        # `--cov=svcforge_core.domain` — the MODULE, not a path. `--cov=libs/svcforge_core/domain`
        # is a path that does not exist (the package nests one level deeper, at
        # libs/svcforge_core/svcforge_core/domain), so coverage measured nothing and reported
        # 0.00%. A path-based --cov that misses silently reports 0 rather than erroring, so
        # without a --cov-fail-under this reads as a passing coverage gate over no code at all.
        run: uv run pytest tests/unit --cov=svcforge_core.domain --cov-fail-under=90

  # --- stages 4+5: migrate, then integration against that schema -----------------------
  integration:
    runs-on: ubuntu-latest
    needs: [unit]
    services:
      postgres:
        image: postgres:16@sha256:33f923b05f64ca54ac4401c01126a6b92afe839a0aa0a52bc5aeb5cc958e5f20
        env:
          POSTGRES_PASSWORD: postgres
          POSTGRES_DB: svcforge
        ports:
          - 5432:5432
        options: >-
          --health-cmd "pg_isready -U postgres"
          --health-interval 5s
          --health-timeout 5s
          --health-retries 10
    env:
      # A scratch Postgres, so a literal password is correct here: it is not a secret, it
      # is a fixture. Real DSNs live in Vault and reach the pods via external-secrets.
      SVCFORGE_PG_DSN: postgresql://postgres:postgres@postgres:5432/svcforge
      SVCFORGE_PG_DSN_SESSION: postgresql://postgres:postgres@postgres:5432/svcforge
      # What tests/integration/conftest.py actually reads. Without it the fixture falls
      # back to testcontainers and starts a SECOND Postgres inside the runner's docker,
      # while the service container above sits unused — slower, and a different database
      # to the one `migrate` just ran against.
      SVCFORGE_TEST_DSN: postgresql://postgres:postgres@postgres:5432/svcforge
    steps:
      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
      - uses: astral-sh/setup-uv@38f3f104447c67c051c4a08e39b64a148898af3a # v4.2.0
        with:
          version: ${{ env.UV_VERSION }}
          enable-cache: true
          cache-dependency-glob: uv.lock
      - run: uv sync --frozen
      - name: migrate
        # The same entrypoint the chart's pre-upgrade hook runs. If migrations only ever
        # ran under testcontainers, CI would be testing a code path production never takes.
        run: uv run python -m svcforge_core.migrate
      - name: pytest integration
        run: uv run pytest tests/integration

  # --- stages 6+7+8: SAST, secrets, dependency CVEs ------------------------------------
  # One job, three independent gates. They share a checkout and nothing else; each `run`
  # step fails the job on its own.
  security:
    runs-on: ubuntu-latest
    needs: [lint]
    steps:
      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
        with:
          # gitleaks scans history, not just the tip. A secret committed and then reverted
          # is still a leaked secret, and a shallow clone cannot see it.
          fetch-depth: 0
      - uses: astral-sh/setup-uv@38f3f104447c67c051c4a08e39b64a148898af3a # v4.2.0
        with:
          version: ${{ env.UV_VERSION }}
          enable-cache: true
          cache-dependency-glob: uv.lock
      - run: uv sync --frozen

      - name: bandit (SAST)
        # `--with`, not a dev dependency: bandit is a CI tool, not something the project
        # imports, and ruff's S ruleset already runs its checks in the lint stage. This is
        # the belt to that suspenders — -ll reports medium severity and above only.
        #
        # `bandit[toml]` + `-c pyproject.toml`: without the toml extra bandit cannot read
        # its own config and silently ignores it, which looks identical to a clean run.
        run: uv run --with 'bandit[toml]' bandit -c pyproject.toml -r libs services -ll

      - name: gitleaks (secret scan)
        # Pinned by digest and run directly, so the command is the documented one rather
        # than a marketplace action's opinion of it.
        run: |
          docker run --rm -v "$PWD:/repo" -w /repo \
            ghcr.io/gitleaks/gitleaks:v8.21.2@sha256:0e99e8821643ea5b235718642b93bb32486af9c8162c8b8731f7cbdc951a7f46 \
            detect --no-banner --source /repo

      - name: pip-audit (dependency CVEs)
        # --strict fails on an audit error rather than shrugging and reporting clean.
        #
        # Audits the LOCKED dependency set, not the installed environment. Auditing the env
        # means auditing `svcforge` and `svcforge-core` too, which are ours, are installed
        # editable, and are not on PyPI — under --strict that is a hard error ("distribution
        # marked as editable"), so the choice was to drop --strict or to stop asking PyPI
        # about packages it has never heard of. This asks about the 56 that actually came
        # from PyPI, and keeps --strict.
        run: |
          uv export --frozen --no-dev \
            --no-emit-project --no-emit-package svcforge-core \
            -o /tmp/requirements-audit.txt
          uv run --with pip-audit pip-audit --strict -r /tmp/requirements-audit.txt

  # --- stage 9: hadolint ---------------------------------------------------------------
  dockerfile:
    runs-on: ubuntu-latest
    needs: [lint]
    steps:
      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
      - name: hadolint
        uses: hadolint/hadolint-action@54c9adbab1582c2ef04b2016b760714a4bfde3cf # v3.1.0
        with:
          recursive: true
          dockerfile: "services/*/Dockerfile"
          failure-threshold: warning

  # --- stage 9b: the chart must render --------------------------------------------------
  # Without this, a chart that does not template reaches ArgoCD and fails in the cluster,
  # where the error surfaces as a sync failure with no PR attached to it. `helm template`
  # is the real gate: it is what ArgoCD does, and _helpers.tpl's image helper calls `fail`
  # on anything that is not a full sha256 digest.
  chart:
    runs-on: ubuntu-latest
    needs: [lint]
    env:
      # Pinned by digest like gitleaks and trivy, and the same helm the worker and
      # reconciler images carry — CI renders with the version that ships.
      HELM: alpine/helm:3.21.3@sha256:35da09ba0716fc7c3cd63b6b31ee380a9c7662e95f29ab0e4ae962420afd315b
    steps:
      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2

      - name: helm lint
        run: |
          docker run --rm -v "$PWD:/repo" -w /repo "$HELM" lint deploy/chart

      - name: helm template (rejects unbumped digests)
        # values.yaml ships all-zeros placeholders, so a bare `helm template` MUST fail.
        # That is the guard working, not a broken chart — asserting the failure here is
        # what stops the guard silently regressing into a prefix check again.
        run: |
          set -euo pipefail
          if docker run --rm -v "$PWD:/repo" -w /repo "$HELM" \
               template svcforge deploy/chart >/dev/null 2>&1; then
            echo "FAIL: chart rendered against the placeholder digests in values.yaml." >&2
            echo "The digest guard in _helpers.tpl is not guarding." >&2
            exit 1
          fi
          echo "ok: placeholder digests rejected"

      - name: helm template (renders with real digests)
        # Dummy but well-formed digests: this checks the templates themselves render, with
        # the two values-gated monitoring blocks explicitly on so they are covered too.
        run: |
          set -euo pipefail
          A="sha256:$(printf 'a%.0s' $(seq 64))"
          B="sha256:$(printf 'b%.0s' $(seq 64))"
          C="sha256:$(printf 'c%.0s' $(seq 64))"
          docker run --rm -v "$PWD:/repo" -w /repo "$HELM" \
            template svcforge deploy/chart \
              --set image.api.digest="$A" \
              --set image.worker.digest="$B" \
              --set image.reconciler.digest="$C" \
              --set serviceMonitor.enabled=true \
              --set prometheusRule.enabled=true \
            >/dev/null
          echo "ok: chart renders"

  # --- stage 10: build -> trivy -> push by digest --------------------------------------
  image:
    runs-on: ubuntu-latest
    # Every gate above is required. An image is not built until all of them are green,
    # which is what makes "the digest CI pushed is a digest that passed everything" true.
    needs: [types, unit, integration, security, dockerfile, chart]
    permissions:
      contents: read
    strategy:
      fail-fast: false
      matrix:
        svc: [api, worker, reconciler]
    # Deliberately no `outputs:` here. Matrix legs share one outputs map and clobber each
    # other — the merge is not per-key and not ordered, so two of the three digests would
    # arrive empty or stale, intermittently. The bump job resolves the digests from the
    # registry instead, which is a read, not a rebuild.
    steps:
      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
      - uses: docker/setup-buildx-action@c47758b77c9736f4b2ef4073d4d51994fabfe349 # v3.7.1

      - name: registry login
        # Not gated to master any more: the build step now reads AND writes the layer cache
        # in the registry, so every run needs credentials. Pushing the release image is
        # still master-only — that gate lives on the `push by digest` step, where it belongs.
        uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567 # v3.3.0
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ secrets.REGISTRY_USER }}
          password: ${{ secrets.REGISTRY_TOKEN }}

      - name: build
        # Context is the repo root and the Dockerfile is addressed with -f. It cannot be
        # otherwise: the image needs pyproject.toml, uv.lock and libs/, all of which live
        # above services/<svc>/, and COPY ../.. is illegal.
        #
        # Loaded locally, not pushed. Trivy scans this exact image next; only then does it
        # get pushed. The alternative — push, scan, and hope nobody pulled meanwhile — is
        # how a CRITICAL ends up in the registry with a green checkmark next to it.
        #
        # The layer cache is `type=registry`, NOT `type=gha`. Two reasons, both hard:
        #
        # 1. act_runner's cache server is backed by a 1Gi PVC that also holds `.runner`,
        #    the runner's own registration file. `mode=max` stores every intermediate layer
        #    of three images — several GB. Filling that volume does not merely lose the
        #    cache: the runner cannot write its state and has to be re-registered by hand.
        #    Trading "slow CI" for "broken CI" is not a trade.
        # 2. act_runner evicts by AGE, with no size cap in its config. It will fill whatever
        #    it is given and then wedge. The registry has no such limit and already holds
        #    the images anyway.
        #
        # The uv/pip cache still uses the runner's cache service — that one is a few hundred
        # MB and fits.
        run: |
          docker buildx build \
            -f services/${{ matrix.svc }}/Dockerfile \
            --build-arg BUILD_SHA=${{ github.sha }} \
            --cache-from type=registry,ref=${REGISTRY}/${IMAGE_NS}/svcforge-${{ matrix.svc }}:buildcache \
            --cache-to type=registry,ref=${REGISTRY}/${IMAGE_NS}/svcforge-${{ matrix.svc }}:buildcache,mode=max \
            --load \
            -t svcforge/${{ matrix.svc }}:ci \
            .

      - name: trivy
        # Run trivy directly rather than via aquasecurity/trivy-action, for the same reason
        # gitleaks is run directly above: the command is the documented one, pinned by
        # digest, with no nested action resolution.
        #
        # It is also the only thing that works here. trivy-action internally does
        # `uses: aquasecurity/setup-trivy@v0.2.2`, and that tag no longer exists upstream —
        # the earliest published tag today is v0.2.6. The runner clones it and fails with
        # "Unable to resolve v0.2.2: reference not found". A third-party action pinned by
        # SHA still resolves ITS OWN dependencies by mutable tag, so pinning the outer
        # action bought nothing.
        #
        # --ignore-unfixed: a CVE with no fix available is not something this PR can act
        # on, and failing on it only teaches people to add ignore entries. Rebuilding on a
        # new base image picks the fix up the day it exists.
        #
        # The mounted cache dir keeps the vuln DB (~50MB) across the three matrix legs on
        # this runner instead of re-downloading it for each.
        run: |
          docker run --rm \
            -v /var/run/docker.sock:/var/run/docker.sock \
            -v "$PWD/.trivycache:/root/.cache/trivy" \
            aquasec/trivy:0.58.1@sha256:ab70a02200597efa04748f210f793936eb647cbcdb0ea69cc30b226d6f5a22c7 \
            image \
              --severity HIGH,CRITICAL \
              --ignore-unfixed \
              --exit-code 1 \
              --format table \
              --no-progress \
              svcforge/${{ matrix.svc }}:ci

      - name: push by digest
        if: github.ref == 'refs/heads/master' && github.event_name == 'push'
        # Re-running buildx here is a cache hit on every layer, not a second build: the
        # image is byte-identical to the one trivy just cleared. buildx cannot --load and
        # --push in one invocation, which is the only reason this step exists.
        #
        # The commit-SHA tag is a handle for the bump job to resolve, not something anything
        # deploys. What deploys is the digest that tag resolves to.
        run: |
          set -euo pipefail
          IMAGE="${REGISTRY}/${IMAGE_NS}/svcforge-${{ matrix.svc }}"
          docker buildx build \
            -f services/${{ matrix.svc }}/Dockerfile \
            --build-arg BUILD_SHA=${{ github.sha }} \
            --cache-from type=registry,ref=${REGISTRY}/${IMAGE_NS}/svcforge-${{ matrix.svc }}:buildcache \
            --push \
            -t "${IMAGE}:${GITHUB_SHA}" \
            .
          docker buildx imagetools inspect "${IMAGE}:${GITHUB_SHA}" \
            --format '{{.Manifest.Digest}}'

  # --- stage 11: bump the chart's digests. CI's last act. ------------------------------
  bump:
    runs-on: ubuntu-latest
    needs: [image]
    if: github.ref == 'refs/heads/master' && github.event_name == 'push'
    permissions:
      contents: write
    steps:
      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
        with:
          # A bot token with contents:write on this repo and nothing else: no kubeconfig,
          # no cluster credential, no ArgoCD API token. CI's maximum blast radius is a bad
          # commit, which is revertable.
          token: ${{ secrets.CI_BOT_TOKEN }}
          ref: master
      - uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567 # v3.3.0
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ secrets.REGISTRY_USER }}
          password: ${{ secrets.REGISTRY_TOKEN }}
      - name: bump image digests in the chart
        env:
          REGISTRY: ${{ env.REGISTRY }}
          IMAGE_NS: ${{ env.IMAGE_NS }}
          IMAGE_TAG: ${{ github.sha }}
        # And then it stops. No kubectl, no helm upgrade, no argocd app sync. ArgoCD is
        # watching master and will have this within a minute.
        run: ./scripts/bump-digests.sh