name: Defer Issues

on:
  workflow_dispatch:

permissions:
  contents: read

jobs:
  defer-issues:
    name: Defer Issues
    runs-on: ubuntu-latest
    if: github.repository_owner == 'spring-projects'
    permissions:
      issues: write
    steps:
    - name: Checkout
      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
    - name: Compute Version
      id: compute-version
      uses: spring-io/spring-release-actions/compute-version@0.0.3
    - name: Get Today's Release Version
      id: todays-release
      uses: spring-io/spring-release-actions/get-todays-release-version@0.0.3
      with:
        snapshot-version: ${{ steps.compute-version.outputs.version }}
        milestone-repository: ${{ github.repository }}
        milestone-token: ${{ secrets.GITHUB_TOKEN }}
    - name: Compute Next Version
      id: next-version
      uses: spring-io/spring-release-actions/compute-next-version@0.0.3
      with:
        version: ${{ steps.todays-release.outputs.release-version }}
    - name: Schedule Next Milestone
      uses: spring-io/spring-release-actions/schedule-milestone@0.0.3
      with:
        version: ${{ steps.next-version.outputs.version }}
        version-date: ${{ steps.next-version.outputs.version-date }}
        repository: ${{ github.repository }}
        token: ${{ secrets.GITHUB_TOKEN }}
    - name: Move Open Issues to Next Milestone
      env:
        GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        CURRENT_MILESTONE: ${{ steps.todays-release.outputs.release-version }}
        NEXT_MILESTONE: ${{ steps.next-version.outputs.version }}
      run: |
        current_milestone_number=$(gh api repos/${{ github.repository }}/milestones \
          --jq ".[] | select(.title == \"$CURRENT_MILESTONE\") | .number")
        if [ -z "$current_milestone_number" ]; then
          echo "No milestone found for $CURRENT_MILESTONE"
          exit 0
        fi
        next_milestone_number=$(gh api repos/${{ github.repository }}/milestones \
          --jq ".[] | select(.title == \"$NEXT_MILESTONE\") | .number")
        if [ -z "$next_milestone_number" ]; then
          echo "No milestone found for $NEXT_MILESTONE"
          exit 1
        fi
        echo "Moving open issues from milestone '$CURRENT_MILESTONE' (#$current_milestone_number) to '$NEXT_MILESTONE' (#$next_milestone_number)"
        page=1
        while true; do
          issues=$(gh api "repos/${{ github.repository }}/issues?milestone=$current_milestone_number&state=open&per_page=100&page=$page" \
            --jq '.[].number')
          if [ -z "$issues" ]; then
            break
          fi
          for issue in $issues; do
            echo "Moving issue/PR #$issue to milestone $NEXT_MILESTONE"
            gh api repos/${{ github.repository }}/issues/$issue \
              --method PATCH \
              --field milestone=$next_milestone_number \
              --silent
          done
          page=$((page + 1))
        done
        echo "Done."