# GitLab-CI dev→prod pipeline for VNCmail+ — GitOps via ArgoCD.
#
# Revised after direct inspection of the real infrastructure found ArgoCD
# already installed (idle, zero Applications) on the dev-k8s-1/2/3 cluster.
# That's more idiomatic than a runner-executes-kubectl design, and it means
# this pipeline needs ZERO cluster credentials — CI only ever talks to the
# container registry and to this git repo. ArgoCD (which already has
# whatever cluster access it needs, set up once when its Applications were
# registered — see deploy/argocd/) is what actually applies anything.
#
# Design:
#   - One image name, environment lives only in the tag. No more -dev/-beta
#     name confusion from the old GitHub Actions workflow.
#   - MR into `dev`: verify only (typecheck/lint/unit test/build check). No
#     push, no deploy — this is the multi-developer merge gate.
#   - Push to `dev`: build+push an immutable `sha-<sha>` tag, then commit a
#     one-line tag-bump into overlays/dev/image-tag/kustomization.yaml
#     (`[skip ci]`, so this doesn't retrigger itself). ArgoCD's `vncmail-dev`
#     Application has automated sync — it notices the git change and applies
#     it. No approval needed, dev always deploys, and this job never touches
#     the cluster directly.
#   - Push to `main`: NEVER rebuilds. `main` only ever advances via
#     `git merge --ff-only dev`, so main's HEAD commit already has a built
#     image (the same sha- tag dev already deployed). This job just bumps
#     overlays/prod/image-tag/kustomization.yaml to point at that same tag.
#     The actual promotion gate is a HUMAN clicking Sync on the `vncmail-prod` ArgoCD
#     Application (deliberately NOT automated sync) — not a GitLab manual
#     job, since ArgoCD already provides that exact gate more directly.
#     Until prod Stalwart/hostname/secrets are real (see VNCMAIL-SETUP.md),
#     nobody should click that Sync button — but nothing here does it for
#     you either way.
#
# Deliberately single-platform (linux/amd64) — this pipeline serves two
# known amd64 microk8s clusters, not public multi-arch distribution (that's
# what the GHCR release workflows are for, untouched by this file).
#
# Registry history (so nobody re-litigates this from scratch): GitLab's own
# Container Registry was the first choice, hit a dead end (registry_external_url
# alone didn't populate $CI_REGISTRY — see git history of this file around
# 2026-08-05 for the GHCR detour that followed), then got fixed server-side
# (gitlab_rails['registry_enabled'] confirmed set — the project's left sidebar
# now shows "Container Registry" under Deploy). Back on GitLab's native
# registry since then: it needs zero extra credentials (CI_REGISTRY_* are
# predefined GitLab CI variables, always present, scoped to this project
# only), which is strictly better than holding a GitHub PAT in GitLab CI/CD
# variables just to push images.
#
# Prerequisite this file assumes (documented in VNCMAIL-SETUP.md, not
# something this file can set up itself):
#   - GitLab Container Registry enabled for this project (confirmed 2026-08-05
#     — "Container Registry" appears in the project's left sidebar under
#     Deploy / Packages and registries).
#   - A GitLab Runner (any kind — no cluster access needed at all now).
#   - Either "allow this job token to push to this project" enabled
#     (Settings → CI/CD → Job token permissions), OR a project access token
#     with `write_repository` scope in $GITLAB_PUSH_TOKEN. The job below
#     tries CI_JOB_TOKEN first (see the script).
#
# deploy/k8s/ca/ (the EJBCA internal CA) is never referenced anywhere below,
# and neither ArgoCD Application in deploy/argocd/ points at it — that stays
# a fully manual, human-only runbook (see deploy/k8s/ca/README.md).

stages:
  - verify
  - build
  - bump-dev
  - bump-prod

variables:
  # GitLab's own registry, scoped to this project. $CI_REGISTRY_IMAGE is a
  # predefined GitLab CI variable (populated automatically once the Container
  # Registry is enabled for the project) — no manual image name to keep in
  # sync, no external credential.
  IMAGE: $CI_REGISTRY_IMAGE
  GIT_STRATEGY: clone

# ---------------------------------------------------------------------------
# verify — required check on every MR into dev. No registry, no cluster.
# ---------------------------------------------------------------------------
verify:
  stage: verify
  image: node:24-alpine
  rules:
    - if: '$CI_PIPELINE_SOURCE == "merge_request_event"'
  script:
    - npm ci
    - npm run typecheck
    - npm run lint
    - npm run test:translations
    - npm run build
  # test:integration is deliberately NOT here — it spins up a real Stalwart
  # fixture via docker-compose (Docker-in-Docker), heavier than a fast MR
  # gate should be. Candidate for a separate scheduled job, not a blocker.

# ---------------------------------------------------------------------------
# build — push to dev only. Builds once; main never rebuilds (see header).
# ---------------------------------------------------------------------------
build:
  stage: build
  image: docker:27-cli
  services:
    - docker:27-dind
  rules:
    - if: '$CI_PIPELINE_SOURCE == "push" && $CI_COMMIT_BRANCH == "dev"'
  variables:
    # docker:27-dind defaults to TLS on :2376 with certs under
    # /certs/client, which this client image never mounts — the dind
    # service comes up fine but the docker:27-cli image can't find it,
    # surfacing as "Cannot connect to the Docker daemon at
    # unix:///var/run/docker.sock" even though $CI_REGISTRY login already
    # succeeded (that's a separate connection, straight to the registry,
    # not through the daemon). Disabling TLS between the two containers of
    # the same job is standard for GitLab's Kubernetes executor — they
    # share a pod network namespace, so plaintext here isn't exposed
    # outside the job.
    DOCKER_HOST: tcp://docker:2375
    DOCKER_TLS_CERTDIR: ""
  before_script:
    # $CI_REGISTRY / $CI_REGISTRY_USER / $CI_REGISTRY_PASSWORD are predefined
    # GitLab CI variables — populated automatically now that this project's
    # Container Registry is enabled. No CI/CD variable to create by hand.
    - echo "$CI_REGISTRY_PASSWORD" | docker login "$CI_REGISTRY" -u "$CI_REGISTRY_USER" --password-stdin
  script:
    - docker build --build-arg GIT_COMMIT=$CI_COMMIT_SHA -t "$IMAGE:sha-$CI_COMMIT_SHORT_SHA" -t "$IMAGE:dev-latest" .
    - docker push "$IMAGE:sha-$CI_COMMIT_SHORT_SHA"
    - docker push "$IMAGE:dev-latest"

# ---------------------------------------------------------------------------
# bump-dev — no cluster access. Commits the just-built tag into the overlay
# ArgoCD watches; ArgoCD's automated sync does the actual apply.
# ---------------------------------------------------------------------------
bump-dev:
  stage: bump-dev
  image: alpine/git:2.47.0
  rules:
    - if: '$CI_PIPELINE_SOURCE == "push" && $CI_COMMIT_BRANCH == "dev"'
  script:
    - TAG="sha-$CI_COMMIT_SHORT_SHA"
    - |
      cat > deploy/k8s/overlays/dev/image-tag/kustomization.yaml <<EOF
      # Owned by CI (bump-dev job in .gitlab-ci.yml) - regenerated every
      # push to dev. Do not hand-edit; edits here get overwritten.
      apiVersion: kustomize.config.k8s.io/v1alpha1
      kind: Component
      images:
        - name: ghcr.io/brvncde-dotcom/vncmail-plus-dev
          newName: $IMAGE
          newTag: $TAG
      EOF
    - git config user.name "vncmail-ci"
    - git config user.email "ci@vnc.biz"
    - git add deploy/k8s/overlays/dev/image-tag/kustomization.yaml
    - |
      if git diff --cached --quiet; then
        echo "No change (tag already pinned) - nothing to commit"
      else
        git commit -m "chore(deploy): pin dev to $TAG [skip ci]"
        git push "https://gitlab-ci-token:${GITLAB_PUSH_TOKEN:-$CI_JOB_TOKEN}@${CI_SERVER_HOST}/${CI_PROJECT_PATH}.git" HEAD:dev
      fi

# ---------------------------------------------------------------------------
# bump-prod — no cluster access, no rebuild. Points overlays/prod at the
# exact tag already running on dev. Does NOT deploy anything: vncmail-prod's
# ArgoCD Application has manual sync, so this only prepares what a human
# would be syncing, it doesn't sync it.
# ---------------------------------------------------------------------------
bump-prod:
  stage: bump-prod
  image: alpine/git:2.47.0
  rules:
    - if: '$CI_PIPELINE_SOURCE == "push" && $CI_COMMIT_BRANCH == "main"'
  script:
    - TAG="sha-$CI_COMMIT_SHORT_SHA"
    - echo "main advanced to $CI_COMMIT_SHA (must be a dev commit, ff-only) - that image already exists as $IMAGE:$TAG"
    - |
      cat > deploy/k8s/overlays/prod/image-tag/kustomization.yaml <<EOF
      # Owned by CI (bump-prod job in .gitlab-ci.yml) - regenerated every
      # push to main. Do not hand-edit; edits here get overwritten. Bumping
      # this is NOT the same as deploying it - vncmail-prod's ArgoCD
      # Application has manual sync, see the note in the parent
      # kustomization.yaml.
      apiVersion: kustomize.config.k8s.io/v1alpha1
      kind: Component
      images:
        - name: ghcr.io/brvncde-dotcom/vncmail-plus-dev
          newName: $IMAGE
          newTag: $TAG
      EOF
    - git config user.name "vncmail-ci"
    - git config user.email "ci@vnc.biz"
    - git add deploy/k8s/overlays/prod/image-tag/kustomization.yaml
    - |
      if git diff --cached --quiet; then
        echo "No change (tag already pinned) - nothing to commit"
      else
        git commit -m "chore(deploy): point prod overlay at $TAG (not synced - manual gate in ArgoCD) [skip ci]"
        git push "https://gitlab-ci-token:${GITLAB_PUSH_TOKEN:-$CI_JOB_TOKEN}@${CI_SERVER_HOST}/${CI_PROJECT_PATH}.git" HEAD:main
      fi