name: Trigger a rebuild with externally required PRs

# Note: this workflow is triggered via workflow_run, which runs in the context of the default branch.
# Therefore we use the statuses api to place it on the source commit manually
on:
  workflow_run:
    workflows: ["Build and test"]
    types: [completed]

permissions:
  actions: write
  contents: read
  statuses: write
  
jobs:
  trigger-rebuild-with-deps:
    name: Apply required PRs from external repos
    runs-on: ubuntu-latest
    if: github.event.workflow_run.conclusion == 'failure'
      && github.event.workflow_run.event == 'pull_request'
      && github.event.workflow_run.run_attempt == 1
    steps:
      - name: Look up PR url
        id: lookup
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          PR_URL=$(gh api \
            "repos/${{ github.repository }}/commits/${{ github.event.workflow_run.head_sha }}/pulls" \
            --jq '.[0].html_url')
          echo "url=$PR_URL" >> $GITHUB_OUTPUT

      - name: Collect required PRs
        uses: MalTeeez/packscripts@1.4.12
        env:
          NO_COLOR: 1
        with:
          command: >-
            pr deps ${{ steps.lookup.outputs.url }}
            --target_dir ./.packscripts/
            --jar_suffix -dev.jar
            --artifact_name -dev.jar
            --artifact_name build-libs
            --build_job "Build and test"
            --other_allowed_owner "GTNewHorizons"
          github_token: ${{ secrets.GITHUB_TOKEN }}
          config: https://raw.githubusercontent.com/MalTeeez/packscripts-auto-builds/refs/heads/gtnh-daily/packscripts.json
          annotated_file: https://raw.githubusercontent.com/MalTeeez/packscripts-auto-builds/refs/heads/gtnh-daily/annotated_mods.json

      - name: Check if deps were collected
        id: check-deps
        run: |
          if [ -n "$(ls -A ./.packscripts/ 2>/dev/null)" ]; then
            echo "found=true" >> "$GITHUB_OUTPUT"
          else
            echo "found=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Mark status pending on PR commit
        if: steps.check-deps.outputs.found == 'true'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          gh api -X POST \
            repos/${{ github.repository }}/statuses/${{ github.event.workflow_run.head_sha }} \
            -f state="pending" \
            -f context="Trigger rebuild with deps" \
            -f description="Applying external PR deps and rebuilding…" \
            -f target_url="${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"

      - name: Upload external deps artifact
        if: steps.check-deps.outputs.found == 'true'
        uses: actions/upload-artifact@v7
        with:
          # Named after the triggering run ID so the rerun can find it by its own run_id.
          # workflow_run always runs in the default branch context, so artifacts would otherwise
          # be filed under master's head_sha instead of the PR's, making them invisible to the rerun.
          name: external-deps-${{ github.event.workflow_run.id }}
          path: ./.packscripts/
          include-hidden-files: true

      - name: Rerun failed build
        if: steps.check-deps.outputs.found == 'true'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          gh api -X POST \
            repos/${{ github.repository }}/actions/runs/${{ github.event.workflow_run.id }}/rerun-failed-jobs

      - name: Report final status to PR commit
        if: always() && steps.check-deps.outputs.found == 'true'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          gh api -X POST \
            repos/${{ github.repository }}/statuses/${{ github.event.workflow_run.head_sha }} \
            -f state="${{ job.status }}" \
            -f context="Trigger rebuild with deps" \
            -f description="External PR deps applied; rebuild triggered" \
            -f target_url="${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"