name: update-changelog
on:
  workflow_dispatch: # allows manual triggering
  schedule:
    - cron: '0 0 * * 0' # runs weekly on Sunday at 00:00

jobs:
  update-changelog:
    runs-on: ubuntu-latest
    steps:
      - name: Generate Github App Token
        uses: navikt/github-app-token-generator@v1
        id: github-app-token
        with:
          app-id: ${{ vars.NIXOS_ASIA_APP_ID }}
          private-key: ${{ secrets.NIXOS_ASIA_PRIVATE_KEY }}
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0  # this fetches all history so `git describe` can see tags
      - name: Install Nix
        uses: DeterminateSystems/nix-installer-action@main
      - uses: cachix/cachix-action@v14
        with:
          name: services-flake
          authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
      - run: "nix develop ./dev -c just changelog"
      - name: Create PR
        id: create-pr
        uses: peter-evans/create-pull-request@v6
        with:
          branch: update_changelog
          commit-message: |
            chore: update changelog
          delete-branch: true
          title: "chore: update changelog"
          token: ${{ steps.github-app-token.outputs.token }}
          labels: |
            automated
          body: ""

      - name: Check if PR is available
        id: check-pr
        run: echo "pr-available=${{ steps.create-pr.outputs.pull-request-number != '' }}" >> $GITHUB_OUTPUT

      - name: Merge PR
        if: steps.check-pr.outputs.pr-available == 'true'
        run: "gh pr merge --auto --rebase --delete-branch ${{ steps.create-pr.outputs.pull-request-number }}"
        env:
          GH_TOKEN: ${{ github.token }}