name: Pull Request Build

on:
  pull_request:

jobs:
  build:
    name: Build
    runs-on: ubuntu-latest
    steps:
      - name: Checkout sources
        uses: actions/checkout@v6
      - name: Setup Java 8
        uses: actions/setup-java@v5
        with:
          distribution: 'temurin'
          java-version: 8
      - name: Setup Java 11
        uses: actions/setup-java@v5
        with:
          distribution: 'temurin'
          java-version: 11
      - name: Setup Java 17
        uses: actions/setup-java@v5
        with:
          distribution: 'temurin'
          java-version: 17
      - name: Setup Java
        uses: actions/setup-java@v5
        with:
          distribution: 'temurin'
          java-version: 21
      - name: Setup Gradle
        uses: gradle/actions/setup-gradle@v6
      - name: Setup Maven Repository
        env:
          SW_MAVEN_CREDENTIALS: ${{ secrets.SW_MAVEN_CREDENTIALS }}
        run: |
          echo "$SW_MAVEN_CREDENTIALS" > steamwar.properties
      - name: Build with Gradle
        run: ./gradlew build --no-daemon

  merge-backport:
    name: Merge backport
    runs-on: ubuntu-latest
    needs: build
    if: ${{ startsWith(github.event.pull_request.base.ref, 'version/') && startsWith(github.event.pull_request.head.ref, 'backport-pr-') }}
    permissions:
      contents: write
      issues: write
      pull-requests: write
    steps:
      - name: Merge successful backport PR
        shell: bash
        env:
          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
        run: |
          set -euo pipefail

          pr_number="$(jq -r '.number' "$GITHUB_EVENT_PATH")"
          target_branch="$(jq -r '.pull_request.base.ref' "$GITHUB_EVENT_PATH")"
          payload="$(jq -n \
            --arg title "Merge backport #${pr_number} into ${target_branch}" \
            '{Do: "merge", MergeTitleField: $title, MergeMessageField: "Automatic CommonCore backport after successful build.", delete_branch_after_merge: true}')"

          curl --fail --silent --show-error \
            -X POST \
            -H "Authorization: token ${GITEA_TOKEN}" \
            -H "Accept: application/json" \
            -H "Content-Type: application/json" \
            --data "$payload" \
            "${GITHUB_API_URL}/repos/${GITHUB_REPOSITORY}/pulls/${pr_number}/merge"