name: CI

on:
  pull_request:
  push:
    branches:
      - main
    tags:
      - "v*"
  workflow_dispatch:

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

permissions:
  contents: read

jobs:
  # Cheap gate so docs-only/roadmap PRs skip the heavyweight jobs. Skipped
  # required checks still satisfy branch protection ("skipped" = success).
  changes:
    name: Changed paths
    runs-on: ubuntu-latest
    outputs:
      code: ${{ steps.filter.outputs.code }}
      mobile: ${{ steps.filter.outputs.mobile }}
    steps:
      - uses: actions/checkout@v4
      - uses: dorny/paths-filter@v3
        id: filter
        with:
          filters: |
            code:
              - 'app/**'
              - 'infra/**'
              - 'docker-compose.yml'
              - 'install.sh'
              - '.github/workflows/**'
              - 'docs/api/**'
            mobile:
              - 'app/mobile/**'

  infra:
    name: Infra (Compose + Scripts)
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Validate Docker Compose config
        run: docker compose -f infra/docker-compose.yml config -q

      - name: Validate Docker Compose with .env.example
        run: docker compose -f infra/docker-compose.yml --env-file .env.example config -q

      - name: Validate root Docker Compose config
        run: docker compose -f docker-compose.yml config -q

      - name: Validate root Docker Compose with .env.example
        run: docker compose -f docker-compose.yml --env-file .env.example config -q

      - name: Validate startup scripts
        run: |
          bash -n start-unified.sh
          bash -n start.sh
          bash -n install.sh

      - name: Run startup preflight tests
        run: bash scripts/test-start-unified-preflight.sh

  backend:
    name: Backend (Go)
    runs-on: ubuntu-latest
    needs: changes
    if: needs.changes.outputs.code == 'true' || github.event_name != 'pull_request'
    defaults:
      run:
        working-directory: app/backend
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Setup Go
        uses: actions/setup-go@v5
        with:
          go-version-file: app/backend/go.mod
          cache: true

      - name: Vet
        run: go vet ./...

      - name: Run backend tests
        run: go test ./...

  frontend:
    name: Frontend (React)
    runs-on: ubuntu-latest
    needs: changes
    if: needs.changes.outputs.code == 'true' || github.event_name != 'pull_request'
    defaults:
      run:
        working-directory: app/frontend
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Setup Node
        uses: actions/setup-node@v4
        with:
          node-version: "22"
          cache: npm
          cache-dependency-path: app/frontend/package-lock.json

      - name: Install dependencies
        run: npm ci

      - name: Lint
        run: npm run lint

      - name: Build (typecheck + bundle)
        run: npm run build:check

      - name: Test
        run: npm test

  mobile:
    name: Mobile (Expo)
    runs-on: ubuntu-latest
    needs: changes
    if: needs.changes.outputs.mobile == 'true' || github.event_name != 'pull_request'
    defaults:
      run:
        working-directory: app/mobile
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Setup Node
        uses: actions/setup-node@v4
        with:
          node-version: "22"
          cache: npm
          cache-dependency-path: app/mobile/package-lock.json

      - name: Install dependencies
        run: npm ci

      - name: Typecheck
        run: npx tsc --noEmit

      - name: Lint
        run: npx expo lint

  smoke:
    name: Compose boot smoke
    runs-on: ubuntu-latest
    timeout-minutes: 20
    needs: changes
    if: needs.changes.outputs.code == 'true' || github.event_name != 'pull_request'
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Boot stack
        # .github/compose.ci.yml swaps every docker.io ref for
        # mirror.gcr.io — anonymous Hub pulls 429 on shared CI IPs.
        run: |
          BETTER_AUTH_SECRET=$(openssl rand -hex 32)
          BETTER_AUTH_INTERNAL_TOKEN=$(openssl rand -hex 32)
          export BETTER_AUTH_SECRET BETTER_AUTH_INTERNAL_TOKEN
          docker compose -f infra/docker-compose.yml -f .github/compose.ci.yml up -d --build postgres dragonfly backend frontend traefik

      - name: Wait for backend health
        run: |
          for _ in $(seq 1 60); do
            if curl -sf http://localhost:8082/health; then exit 0; fi
            sleep 5
          done
          docker compose -f infra/docker-compose.yml logs --tail 50 backend
          exit 1

      - name: Check frontend responds
        run: |
          for _ in $(seq 1 30); do
            if curl -sf http://localhost:3000/ -o /dev/null; then exit 0; fi
            sleep 2
          done
          docker compose -f infra/docker-compose.yml logs --tail 50 frontend
          exit 1

      - name: Teardown
        if: always()
        run: docker compose -f infra/docker-compose.yml down -v

  docker:
    name: Build & publish images
    runs-on: ubuntu-latest
    needs: [backend, frontend, smoke]
    if: needs.backend.result == 'success' && needs.frontend.result == 'success' && needs.smoke.result == 'success'
    permissions:
      contents: read
      packages: write
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Setup Docker Buildx
        # Mirror docker.io through gcr — shared CI IPs hit anonymous
        # rate limits on base-image metadata resolution otherwise.
        uses: docker/setup-buildx-action@v3
        with:
          config-inline: |
            [registry."docker.io"]
              mirrors = ["mirror.gcr.io"]

      - name: Login to GHCR
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Backend image metadata
        id: meta-backend
        uses: docker/metadata-action@v5
        with:
          images: ghcr.io/${{ github.repository }}-backend
          tags: |
            type=ref,event=branch
            type=ref,event=pr
            type=ref,event=tag
            type=semver,pattern={{version}}
            type=sha,format=short
            type=raw,value=latest,enable=${{ startsWith(github.ref, 'refs/tags/v') }}

      - name: Frontend image metadata
        id: meta-frontend
        uses: docker/metadata-action@v5
        with:
          images: ghcr.io/${{ github.repository }}-frontend
          tags: |
            type=ref,event=branch
            type=ref,event=pr
            type=ref,event=tag
            type=semver,pattern={{version}}
            type=sha,format=short
            type=raw,value=latest,enable=${{ startsWith(github.ref, 'refs/tags/v') }}

      - name: Build backend image
        uses: docker/build-push-action@v6
        with:
          context: app/backend
          load: true
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta-backend.outputs.tags }}
          labels: ${{ steps.meta-backend.outputs.labels }}
          # Stamp the release tag into the binary so the in-app upgrade
          # check knows what it's running ("dev" disables it).
          build-args: |
            VERSION=${{ github.ref_type == 'tag' && github.ref_name || 'dev' }}
          cache-from: type=gha,scope=backend
          cache-to: type=gha,mode=max,scope=backend

      - name: Build frontend image
        uses: docker/build-push-action@v6
        with:
          context: app/frontend
          load: true
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta-frontend.outputs.tags }}
          labels: ${{ steps.meta-frontend.outputs.labels }}
          cache-from: type=gha,scope=frontend
          cache-to: type=gha,mode=max,scope=frontend

      - name: Scan backend image
        uses: aquasecurity/trivy-action@v0.36.0
        with:
          image-ref: ${{ fromJSON(steps.meta-backend.outputs.json).tags[0] }}
          format: table
          exit-code: "0"
          ignore-unfixed: true
          vuln-type: os,library
          severity: CRITICAL,HIGH

      - name: Scan frontend image
        uses: aquasecurity/trivy-action@v0.36.0
        with:
          image-ref: ${{ fromJSON(steps.meta-frontend.outputs.json).tags[0] }}
          format: table
          exit-code: "0"
          ignore-unfixed: true
          vuln-type: os,library
          severity: CRITICAL,HIGH

  release:
    name: Release
    runs-on: ubuntu-latest
    needs: [docker]
    if: github.event_name != 'pull_request' && needs.docker.result == 'success'
    permissions:
      contents: write
      packages: write
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      # Conventional-commit bump. Tags pushed with GITHUB_TOKEN do not
      # retrigger this workflow, so images are retagged below instead.
      - name: Bump version and push tag
        if: github.ref == 'refs/heads/main'
        id: tag_version
        uses: mathieudutour/github-tag-action@v6.2
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          default_bump: false

      - name: Resolve release tag
        id: release
        run: |
          if [ "${{ github.ref_type }}" = "tag" ]; then
            tag="${GITHUB_REF_NAME}"
          else
            tag="${{ steps.tag_version.outputs.new_tag }}"
          fi
          if [ -z "$tag" ]; then
            echo "No releasable commits since last tag - skipping release."
          fi
          echo "tag=$tag" >> "$GITHUB_OUTPUT"

      - name: Setup Go
        if: steps.release.outputs.tag != ''
        uses: actions/setup-go@v5
        with:
          go-version-file: app/backend/go.mod
          cache: true

      - name: Build CLI binaries
        if: steps.release.outputs.tag != ''
        working-directory: app/backend
        env:
          VERSION: ${{ steps.release.outputs.tag }}
        run: bash ../../scripts/build-cli.sh

      - name: Checksums
        if: steps.release.outputs.tag != ''
        working-directory: app/backend/bin
        run: sha256sum containr-* > checksums.txt

      - name: Login to GHCR
        if: steps.release.outputs.tag != '' && github.ref == 'refs/heads/main'
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # Tag pushes from github-tag-action do not trigger workflows, so the
      # release job retags the just-published :main images in-registry.
      - name: Tag release images in GHCR
        if: steps.release.outputs.tag != '' && github.ref == 'refs/heads/main'
        env:
          TAG: ${{ steps.release.outputs.tag }}
        run: |
          repo="${GITHUB_REPOSITORY,,}"
          for img in backend frontend; do
            docker buildx imagetools create \
              --tag "ghcr.io/${repo}-${img}:${TAG}" \
              --tag "ghcr.io/${repo}-${img}:latest" \
              "ghcr.io/${repo}-${img}:main"
          done

      - name: Create GitHub Release
        if: steps.release.outputs.tag != ''
        working-directory: app/backend/bin
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          TAG: ${{ steps.release.outputs.tag }}
        run: |
          # Delete-then-create keeps reruns idempotent: --clobber uploads
          # race GitHub's asset tombstones and intermittently 422. The git
          # tag itself is kept (no --cleanup-tag).
          gh release delete "$TAG" --yes 2>/dev/null || true
          gh release create "$TAG" --title "$TAG" --generate-notes \
            containr-* checksums.txt