# GitLab-CI dev→prod pipeline for VNCmail+ — GitOps via ArgoCD.
#
# Design:
#   - 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 with Docker +
#     docker-in-docker, then commit a one-line tag-bump into
#     overlays/dev/image-tag/kustomization.yaml (`[skip ci]`). ArgoCD's
#     `vncmail-dev` Application syncs it automatically.
#   - Push to `main`: NEVER rebuilds. `main` only advances via
#     `git merge --ff-only dev`, so main's HEAD commit already has a built
#     image. 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 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).
#
# Prerequisite this file assumes:
#   - A GitLab Runner with Docker-in-Docker service support (Kubernetes or
#     Docker executor). The `docker:28.4.0-dind` service requires privileged
#     mode on most Kubernetes executors.
#   - 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 bump jobs
#     try 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:
  IMAGE: $CI_REGISTRY_IMAGE
  GIT_STRATEGY: clone
  DOCKER_DRIVER: overlay2
  # DinD service is reached at the `docker` alias (set explicitly on the
  # service below), not localhost. TLS disabled so the daemon listens on
  # plaintext 2375 — same pattern as the working vnc-localidp pipeline.
  DOCKER_HOST: tcp://docker:2375
  DOCKER_TLS_CERTDIR: ""

# ---------------------------------------------------------------------------
# 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, which needs an actual Docker daemon this
  # runner's Kubernetes executor doesn't provide without privileged mode
  # (see the build job below). Candidate for a separate scheduled job on a
  # differently-configured runner, not a blocker on every MR.

# ---------------------------------------------------------------------------
# build — push to dev only. Builds once; main never rebuilds (see header).
# ---------------------------------------------------------------------------
build:
  stage: build
  image: docker:28.4.0
  services:
    - name: docker:28.4.0-dind
      alias: docker
  rules:
    - if: '$CI_PIPELINE_SOURCE == "push" && $CI_COMMIT_BRANCH == "dev"'
  before_script:
    - until docker info; do sleep 1; done
    - docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" "$CI_REGISTRY"
  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
  # alpine/git:2.47.0 was never published on Docker Hub — the 2.47.x line
  # starts at 2.47.1. Using 2.47.2 (latest 2.47.x).
  image: alpine/git:2.47.2
  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: vncmail-plus
          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:2.47.2
  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: vncmail-plus
          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