# This workflow derives the next release version from the repository, tags it,
# updates the published release, and deploys the artifact to Maven Central.

name: Release To Maven Central

on:
  release:
    types: [published]

jobs:
  publish:
    if: ${{ !github.event.release.prerelease }}

    runs-on: ubuntu-latest
    permissions:
      contents: write

    steps:
    - uses: actions/checkout@v4
      with:
        fetch-depth: 0
        ref: ${{ github.event.repository.default_branch }}
    - name: Set up JDK 25
      uses: actions/setup-java@v4
      with:
        java-version: '25'
        distribution: 'temurin'
        server-id: central
        server-username: MAVEN_USERNAME
        server-password: MAVEN_PASSWORD
        gpg-private-key: ${{ secrets.GPG_SIGNING_KEY }}
        gpg-passphrase: MAVEN_GPG_PASSPHRASE
    - name: Configure Git
      run: |
        git config user.name "github-actions[bot]"
        git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
    - name: Calculate release version
      id: version
      shell: bash
      run: |
        set -euo pipefail

        current_version="$(mvn -q -DforceStdout help:evaluate -Dexpression=project.version | tail -n 1 | tr -d '\r')"
        base_version="${current_version%-SNAPSHOT}"

        if [[ ! "$base_version" =~ ^([0-9]+)\.([0-9]+)\.([0-9]+)$ ]]; then
          echo "Unsupported project version format: $current_version" >&2
          exit 1
        fi

        major="${BASH_REMATCH[1]}"
        minor="${BASH_REMATCH[2]}"
        release_version="${major}.$((minor + 1)).0"

        echo "current_version=$current_version" >> "$GITHUB_OUTPUT"
        echo "release_version=$release_version" >> "$GITHUB_OUTPUT"
        echo "release_tag=$release_version" >> "$GITHUB_OUTPUT"
    - name: Update release files
      env:
        RELEASE_VERSION: ${{ steps.version.outputs.release_version }}
      run: |
        set -euo pipefail

        mvn -B versions:set -DnewVersion="$RELEASE_VERSION" -DgenerateBackupPoms=false
        perl -0pi -e 's{<version>\d+\.\d+\.\d+</version>}{<version>'"$RELEASE_VERSION"'</version>}g' README.md
    - name: Commit release version
      env:
        RELEASE_VERSION: ${{ steps.version.outputs.release_version }}
      run: |
        set -euo pipefail

        git add pom.xml README.md
        git commit -m "chore: release $RELEASE_VERSION"
        git push origin HEAD:${{ github.event.repository.default_branch }}
    - name: Create release tag
      env:
        RELEASE_TAG: ${{ steps.version.outputs.release_tag }}
      run: |
        set -euo pipefail

        git tag "$RELEASE_TAG"
        git push origin "$RELEASE_TAG"
    - name: Retarget GitHub release
      env:
        GH_TOKEN: ${{ github.token }}
        RELEASE_ID: ${{ github.event.release.id }}
        RELEASE_TAG: ${{ steps.version.outputs.release_tag }}
      run: |
        set -euo pipefail

        gh api "repos/${GITHUB_REPOSITORY}/releases/${RELEASE_ID}" \
          --method PATCH \
          -f tag_name="$RELEASE_TAG" \
          -f target_commitish="${{ github.event.repository.default_branch }}" \
          -f name="$RELEASE_TAG"
    - name: Publish package
      run: mvn -B -P release deploy -DskipTests
      env:
        MAVEN_USERNAME: ${{ secrets.CENTRAL_TOKEN_USERNAME }}
        MAVEN_PASSWORD: ${{ secrets.CENTRAL_TOKEN_PASSWORD }}
        MAVEN_GPG_PASSPHRASE: ${{ secrets.GPG_SIGNING_KEY_PASSWORD }}