name: Release

permissions:
  contents: read

on:
  push:
    branches:
      - main
  workflow_dispatch:

jobs:
  build:
    name: Build binaries
    runs-on: ubuntu-latest
    strategy:
      matrix:
        include:
          - goos: linux
            goarch: amd64
            cgo: 0
          - goos: linux
            goarch: arm64
            cgo: 0
          - goos: linux
            goarch: 386
            cgo: 0
          - goos: linux
            goarch: arm
            goarm: "7"
            cgo: 0
          - goos: linux
            goarch: mipsle
            gomips: softfloat
            cgo: 0
          - goos: linux
            goarch: mips
            gomips: softfloat
            cgo: 0
          - goos: linux
            goarch: mips64le
            gomips: softfloat
            cgo: 0
          - goos: linux
            goarch: riscv64
            cgo: 0
          - goos: darwin
            goarch: amd64
            cgo: 0
          - goos: darwin
            goarch: arm64
            cgo: 0
          - goos: windows
            goarch: amd64
            cgo: 0
          - goos: windows
            goarch: arm64
            cgo: 0
          - goos: windows
            goarch: 386
            cgo: 0
          - goos: android
            goarch: arm64
            cgo: 1
            api: 21
          - goos: android
            goarch: arm
            cgo: 1
            api: 21
          - goos: freebsd
            goarch: amd64
            cgo: 0

    steps:
      - name: Check out code
        uses: actions/checkout@v6

      - name: Set up Go
        uses: actions/setup-go@v6
        with:
          go-version: "1.25.5"

      # Install Android NDK only for android rows
      - name: Setup Android NDK
        if: matrix.goos == 'android'
        id: setup-ndk
        uses: nttld/setup-ndk@v1
        with:
          ndk-version: r26d
          add-to-path: false

      - name: Build
        env:
          GOOS: ${{ matrix.goos }}
          GOARCH: ${{ matrix.goarch }}
          GOMIPS: ${{ matrix.gomips }}
          GOARM: ${{ matrix.goarm }}
          CGO_ENABLED: ${{ matrix.cgo }}
          ANDROID_API: ${{ matrix.api }}
          ANDROID_NDK_HOME: ${{ steps.setup-ndk.outputs.ndk-path }}
          VERSION: ${{ github.ref_name }}
        run: |
          echo "Building for $GOOS/$GOARCH${GOARM:+/arm$GOARM} (CGO_ENABLED=$CGO_ENABLED)"

          if [ "$GOOS" = "android" ]; then
            if [ -z "$ANDROID_NDK_HOME" ]; then
              echo "ANDROID_NDK_HOME is not set – did setup-ndk run?"
              exit 1
            fi

            TOOLCHAIN_BIN="$ANDROID_NDK_HOME/toolchains/llvm/prebuilt/linux-x86_64/bin"

            if [ "$GOARCH" = "arm64" ]; then
              export CC="$TOOLCHAIN_BIN/aarch64-linux-android${ANDROID_API}-clang"
            elif [ "$GOARCH" = "arm" ]; then
              export CC="$TOOLCHAIN_BIN/armv7a-linux-androideabi${ANDROID_API}-clang"
            else
              echo "Unsupported ANDROID GOARCH=$GOARCH"
              exit 1
            fi

            echo "Using Android NDK CC=$CC"
          fi

          mkdir -p dist

          # Set extension for windows
          if [ "${GOOS}" = "windows" ]; then
            EXT=.exe
          else
            EXT=
          fi

          GOOS=$GOOS GOARCH=$GOARCH GOARM=$GOARM GOMIPS=$GOMIPS \
          go build -ldflags "-s -w -checklinkname=0" -trimpath \
            -o "dist/client-${GOOS}-${GOARCH}${EXT}" \
            ./client

          GOOS=$GOOS GOARCH=$GOARCH GOARM=$GOARM GOMIPS=$GOMIPS \
          go build -ldflags "-s -w -checklinkname=0" -trimpath \
            -o "dist/server-${GOOS}-${GOARCH}${EXT}" \
            ./server

      - name: Upload artifact
        uses: actions/upload-artifact@v6
        with:
          name: good-turn-${{ matrix.goos }}-${{ matrix.goarch }}
          path: dist/**

  release:
    name: Create GitHub Release
    needs: build
    runs-on: ubuntu-latest
    outputs:
      should_release: ${{ steps.meta.outputs.should_release }}
      tag_name: ${{ steps.meta.outputs.tag_name }}
    permissions:
      contents: write
    steps:
      - name: Check out code
        uses: actions/checkout@v6
        with:
          fetch-depth: 0
          fetch-tags: true

      - name: Download build artifacts
        uses: actions/download-artifact@v7
        with:
          path: dist

      - name: Prepare release metadata
        id: meta
        run: |
          LATEST_TAG="$(git tag -l | grep -E '^(v)?[0-9]+\.[0-9]+\.[0-9]+$' | sort -V | tail -n 1 || true)"
          PREFIX=""
          BASE_VERSION="$LATEST_TAG"

          if [ -z "$LATEST_TAG" ]; then
            BASE_VERSION="0.0.0"
          elif [ "${LATEST_TAG#v}" != "$LATEST_TAG" ]; then
            PREFIX="v"
            BASE_VERSION="${LATEST_TAG#v}"
          fi

          IFS=. read -r MAJOR MINOR PATCH <<< "$BASE_VERSION"

          if [ -n "$LATEST_TAG" ]; then
            RANGE="$LATEST_TAG..HEAD"
          else
            RANGE="HEAD"
          fi

          COMMITS="$(git log --no-merges --format='%s' "$RANGE")"
          BUMP=""

          if printf '%s\n' "$COMMITS" | grep -Eiq '^break([(:! ]|$)'; then
            BUMP="major"
            MAJOR=$((MAJOR + 1))
            MINOR=0
            PATCH=0
          elif printf '%s\n' "$COMMITS" | grep -Eiq '^feat([(:! ]|$)'; then
            BUMP="minor"
            MINOR=$((MINOR + 1))
            PATCH=0
          elif printf '%s\n' "$COMMITS" | grep -Eiq '^fix([(:! ]|$)'; then
            BUMP="patch"
            PATCH=$((PATCH + 1))
          fi

          NEXT_VERSION="${MAJOR}.${MINOR}.${PATCH}"
          NEXT_TAG="${PREFIX}${NEXT_VERSION}"

          {
            echo "previous_tag=$LATEST_TAG"
            echo "range=$RANGE"
            echo "bump=$BUMP"
            echo "should_release=$([ -n "$BUMP" ] && echo true || echo false)"
            echo "tag_name=$NEXT_TAG"
            echo "release_name=$NEXT_TAG"
            echo "body_path=release-notes.md"
          } >> "$GITHUB_OUTPUT"

      - name: Generate release notes from commit messages
        id: notes
        if: steps.meta.outputs.should_release == 'true'
        env:
          PREVIOUS_TAG: ${{ steps.meta.outputs.previous_tag }}
          NEXT_TAG: ${{ steps.meta.outputs.tag_name }}
          BUMP: ${{ steps.meta.outputs.bump }}
          RANGE: ${{ steps.meta.outputs.range }}
        run: |
          strip_prefix() {
            sed -E 's/^(feat|fix|break)([(!:]|[[:space:]])+[[:space:]]*//I'
          }

          FEATURES="$(git log --no-merges --format='%s (%h)' "$RANGE" | grep -Ei '^feat([(:! ]|$)' | strip_prefix | LC_ALL=C sort -f || true)"
          FIXES="$(git log --no-merges --format='%s (%h)' "$RANGE" | grep -Ei '^fix([(:! ]|$)' | strip_prefix | LC_ALL=C sort -f || true)"
          BREAKING="$(git log --no-merges --format='%s (%h)' "$RANGE" | grep -Ei '^break([(:! ]|$)' | strip_prefix | LC_ALL=C sort -f || true)"

          {
            echo "body_path=release-notes.md"
          } >> "$GITHUB_OUTPUT"

          {
            if [ -n "$BREAKING" ]; then
              echo "### Breaking Changes"
              echo
              printf '%s\n' "$BREAKING" | sed 's/^/- /'
              echo
            fi

            if [ -n "$FEATURES" ]; then
              echo "### Features"
              echo
              printf '%s\n' "$FEATURES" | sed 's/^/- /'
              echo
            fi

            if [ -n "$FIXES" ]; then
              echo "### Bug Fixes"
              echo
              printf '%s\n' "$FIXES" | sed 's/^/- /'
              echo
            fi
          } > release-notes.md

      - name: Create Release
        if: steps.meta.outputs.should_release == 'true'
        uses: softprops/action-gh-release@v2
        with:
          # upload every file in dist/ including nested files
          files: |
            dist/**
          tag_name: ${{ steps.meta.outputs.tag_name }}
          target_commitish: ${{ github.sha }}
          name: ${{ steps.meta.outputs.release_name }}
          body_path: ${{ steps.meta.outputs.body_path }}
          overwrite_files: true
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Skip release when no semantic commit is found
        if: steps.meta.outputs.should_release != 'true'
        run: |
          echo "No new semantic release created."
          echo "Add a commit starting with break, feat, or fix after the latest tag."

  docker:
    name: Publish Docker image
    needs: release
    if: needs.release.outputs.should_release == 'true'
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    steps:
      - name: Check out code
        uses: actions/checkout@v6

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v4

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

      - name: Prepare image name
        id: image
        env:
          REPOSITORY: ${{ github.repository }}
        run: |
          echo "name=ghcr.io/$(echo "$REPOSITORY" | tr '[:upper:]' '[:lower:]')" >> "$GITHUB_OUTPUT"

      - name: Log in to GitHub Container Registry
        uses: docker/login-action@v4
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@v6
        with:
          images: ${{ steps.image.outputs.name }}
          tags: |
            type=raw,value=latest
            type=raw,value=${{ needs.release.outputs.tag_name }}

      - name: Build and push Docker image
        uses: docker/build-push-action@v7
        with:
          context: .
          file: ./Dockerfile
          platforms: linux/amd64,linux/arm64
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}