name: release

# Builds and pushes the minstrel container image to the Gitea registry.
#
#   push to main         → :main
#   push tag vX.Y.Z      → :vX.Y.Z and :latest
#   workflow_dispatch    → manual trigger (same rules based on the ref)

on:
  push:
    branches: [main]
    tags: ['v*']
    # Tag pushes still build (tag releases are intentional, server + Flutter
    # share the version). Branch pushes skip when the diff is Flutter-only —
    # rebuilding the Go image for a Flutter-only merge wastes CI and churns
    # the registry.
    paths-ignore:
      - 'flutter_client/**'
      - 'docs/**'
      - '**/*.md'
  workflow_dispatch:

jobs:
  release:
    runs-on: go-ci
    container:
      image: git.fabledsword.com/bvandeusen/ci-go:1.26

    env:
      IMAGE: git.fabledsword.com/bvandeusen/minstrel

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Detect buildable project
        id: guard
        shell: bash
        run: |
          if [ -f Dockerfile ] && [ -f go.mod ]; then
            echo "ready=true" >> "$GITHUB_OUTPUT"
          else
            echo "ready=false" >> "$GITHUB_OUTPUT"
            echo "::notice::No Dockerfile + go.mod yet — release build skipped"
          fi

      - name: Compute image tags
        id: tags
        if: steps.guard.outputs.ready == 'true'
        shell: bash
        run: |
          if [[ "${GITHUB_REF}" == refs/tags/v* ]]; then
            VERSION="${GITHUB_REF#refs/tags/}"
            echo "args=-t ${IMAGE}:${VERSION} -t ${IMAGE}:latest" >> "$GITHUB_OUTPUT"
            echo "version=${VERSION}" >> "$GITHUB_OUTPUT"
            echo "::notice::Release build: ${VERSION} + latest"
          else
            echo "args=-t ${IMAGE}:main" >> "$GITHUB_OUTPUT"
            echo "version=main" >> "$GITHUB_OUTPUT"
            echo "::notice::Main-branch build: :main"
          fi

      - name: Registry login
        if: steps.guard.outputs.ready == 'true'
        shell: bash
        run: |
          echo "${{ secrets.CI_TOKEN }}" \
            | docker login git.fabledsword.com -u "${{ github.actor }}" --password-stdin

      # In-app update flow (#397): on tag pushes only, fetch the APK
      # that flutter.yml is attaching to this same release. flutter.yml
      # runs in parallel; poll up to 15 min for the asset to appear.
      # On main pushes (or if the APK never lands), client/ stays empty
      # and the endpoints return 404 — graceful degradation.
      - name: Fetch APK for bundled in-app update channel
        if: steps.guard.outputs.ready == 'true' && startsWith(github.ref, 'refs/tags/v')
        shell: bash
        env:
          CI_TOKEN: ${{ secrets.CI_TOKEN }}
        run: |
          TAG="${GITHUB_REF#refs/tags/}"
          REPO="${GITHUB_REPOSITORY}"
          APK_URL="https://git.fabledsword.com/${REPO}/releases/download/${TAG}/minstrel-${TAG}.apk"
          echo "Polling ${APK_URL} (up to 15 min for flutter.yml to attach)..."
          for i in $(seq 1 30); do
            if curl -fsSL -H "Authorization: token ${CI_TOKEN}" \
                -o client/minstrel.apk "$APK_URL"; then
              echo "Got APK on attempt $i"
              echo "${TAG}" > client/minstrel.apk.version
              ls -lh client/
              exit 0
            fi
            echo "APK not ready yet (attempt $i/30), sleeping 30s..."
            sleep 30
          done
          echo "::warning::APK never appeared at ${APK_URL} after 15 min — image will ship without bundled update channel"

      - name: Build and push
        if: steps.guard.outputs.ready == 'true'
        run: |
          docker buildx build \
            --build-arg MINSTREL_VERSION="${{ steps.tags.outputs.version }}" \
            --push ${{ steps.tags.outputs.args }} .