# CI runs first; build only proceeds if lint + typecheck pass.
#
# Push to dev:       typecheck + lint + test + build :dev + :<sha>
# Push to main:      typecheck + lint + test + build :latest + :<sha>
# Tag v* (release):  typecheck + lint + test + build :latest + :<version> + :<sha>
#
# main is the production line, so a merge to main rebuilds and moves :latest to its
# tip (family rule 46) — no version release required. The :<sha> image is the
# immutable rollback unit for every build.
#
# Required secret (repo -> Settings -> Secrets -> Actions):
#   REGISTRY_TOKEN  -- Forgejo PAT with write:packages scope
# The registry username is derived from github.repository_owner (public — it's in
# the image path), so no REGISTRY_USER secret is needed.
name: CI & Build

on:
  push:
    branches: [dev, main]
    tags: ["v*"]
    paths:
      - "src/**"
      - "frontend/**"
      - "tests/**"
      - "pyproject.toml"
      - "alembic/**"
      - "alembic.ini"
      - "Dockerfile"
      - ".forgejo/workflows/ci.yml"

# Cancel older runs on the same branch when a newer push lands. Tag runs get their
# own group implicitly and are never cancelled.
concurrency:
  group: ci-${{ github.ref }}
  cancel-in-progress: ${{ !startsWith(github.ref, 'refs/tags/') }}

permissions:
  contents: read

env:
  REGISTRY: git.fabledsword.com
  IMAGE: git.fabledsword.com/bvandeusen/thoughtsync

jobs:
  typecheck:
    name: TypeScript typecheck
    if: github.ref == 'refs/heads/dev' || github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/v')
    runs-on: python-ci
    container:
      image: git.fabledsword.com/bvandeusen/ci-python:3.14
    steps:
      - uses: actions/checkout@v6

      - name: Install dependencies
        run: npm ci
        working-directory: frontend

      - name: Type check
        run: npx vue-tsc --noEmit
        working-directory: frontend

  lint:
    name: Python lint
    if: github.ref == 'refs/heads/dev' || github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/v')
    runs-on: python-ci
    container:
      image: git.fabledsword.com/bvandeusen/ci-python:3.14
    steps:
      - uses: actions/checkout@v6

      # ruff is pre-installed in the ci-runner base image.
      - name: Lint
        run: ruff check src/

  test:
    name: Python tests
    if: github.ref == 'refs/heads/dev' || github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/v')
    runs-on: python-ci
    container:
      image: git.fabledsword.com/bvandeusen/ci-python:3.14
    steps:
      - uses: actions/checkout@v6

      - name: Create virtual environment
        run: uv venv /opt/venv

      - name: Install package with dev deps
        run: uv pip install --python /opt/venv/bin/python -e ".[dev]"

      - name: Run tests
        run: /opt/venv/bin/python -m pytest tests/ -q

  build:
    name: Build & push image
    # Build gates on lint + typecheck. The `test` job runs in parallel for
    # visibility but does not block dev image builds (DB-backed integration
    # testing happens against the dev image manually, not on every push).
    needs: [typecheck, lint]
    if: github.ref == 'refs/heads/dev' || github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/v')
    runs-on: python-ci
    container:
      image: git.fabledsword.com/bvandeusen/ci-python:3.14
    permissions:
      contents: read
      packages: write
    steps:
      - uses: actions/checkout@v6

      - name: Generate image tags and version
        id: tags
        # run: steps execute under busybox sh (family rule 81), so use POSIX `case`,
        # NOT bash `[[ ]]`.
        run: |
          TAGS="${{ env.IMAGE }}:${{ github.sha }}"
          BUILD_VERSION="dev"
          case "${{ github.ref }}" in
            refs/heads/dev)
              TAGS="$TAGS,${{ env.IMAGE }}:dev"
              ;;
            refs/heads/main)
              # Production line: :latest tracks main's tip (rule 46). No :main tag;
              # the :<sha> above is the rollback unit. Version label = short sha.
              TAGS="$TAGS,${{ env.IMAGE }}:latest"
              BUILD_VERSION="$(echo ${{ github.sha }} | cut -c1-7)"
              ;;
            refs/tags/*)
              TAGS="$TAGS,${{ env.IMAGE }}:latest,${{ env.IMAGE }}:${{ github.ref_name }}"
              BUILD_VERSION="${{ github.ref_name }}"
              ;;
          esac
          echo "value=$TAGS" >> $GITHUB_OUTPUT
          echo "build_version=$BUILD_VERSION" >> $GITHUB_OUTPUT

      - name: Free disk space
        run: |
          docker system prune -af || true
          docker builder prune --keep-storage 5g -f || true

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v4

      - name: Log in to Forgejo registry
        uses: docker/login-action@v4
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.repository_owner }}
          password: ${{ secrets.REGISTRY_TOKEN }}

      - name: Build and push
        uses: docker/build-push-action@v7
        with:
          context: .
          push: true
          provenance: false
          tags: ${{ steps.tags.outputs.value }}
          build-args: BUILD_VERSION=${{ steps.tags.outputs.build_version }}
          cache-from: type=registry,ref=${{ env.IMAGE }}:cache
          cache-to: type=registry,ref=${{ env.IMAGE }}:cache,mode=max,ignore-error=true