---
name: ArgoCD Diff
on:
  workflow_dispatch:
  workflow_call:
  pull_request:
    branches:
      - main

jobs:
  argocd-diff-preview:
    runs-on: docker
    container:
      options: --volume /var/run/docker.sock:/var/run/docker.sock
    env:
      PR_NUMBER: ${{ forge.event.pull_request.number }}
      GITHUB_TOKEN: ${{ secrets.FORGEJO_TOKEN }}
    steps:
      - uses: https://github.com/actions/checkout@v6
        with:
          path: pull-request

      - uses: https://github.com/actions/checkout@v6
        with:
          ref: main
          path: main

      - name: Install Docker CLI
        run: |
          if command -v apt-get &>/dev/null; then
            apt-get update -qq && apt-get install -y --no-install-recommends docker.io
          elif command -v apk &>/dev/null; then
            apk add --no-cache docker-cli
          fi

      - name: Generate Diff
        run: |
          mkdir -p $(pwd)/output
          docker run \
            --network=host \
            -v /var/run/docker.sock:/var/run/docker.sock \
            -v $(pwd)/main:/base-branch \
            -v $(pwd)/pull-request:/target-branch \
            -v $(pwd)/output:/output \
            -e TARGET_BRANCH=refs/pull/$PR_NUMBER/merge \
            -e REPO=${{ forge.repository }} \
            dagandersen/argocd-diff-preview:v0.2.8

      - name: Add comment
        id: comment
        run: |
          DIFF_BODY=$(cat output/diff.md)
          payload="{\"body\": $DIFF_BODY}"

          existing_comment=$(curl -s \
            -H "Authorization: token ${{ secrets.FORGEJO_TOKEN }}" \
            "${{ forge.api_url }}/repos/${{ forge.repository }}/issues/$PR_NUMBER/comments")
          comment_id=$(echo "$existing_comment" | jq -r \
            '.[] | select(.body | test("${{ forge.workflow }}")) | .id' | head -n 1)


          if [ -n "${comment_id}" ] && [ "${comment_id}" != "null" ]; then
            echo "Found comment with id ${comment_id}, updating..." && \
            curl -s -X PATCH \
              -H "Authorization: token ${{ secrets.FORGEJO_TOKEN }}" \
              -H "Content-Type: application/json" \
              "${{ forge.api_url }}/repos/${{ forge.repository }}/issues/comments/${comment_id}" \
              -d "$payload"
          else
            echo "Creating new comment..." && \
            curl -s -X POST \
              -H "Authorization: token ${{ secrets.FORGEJO_TOKEN }}" \
              -H "Content-Type: application/json" \
              "${{ forge.api_url }}/repos/${{ forge.repository }}/issues/$PR_NUMBER/comments" \
              -d "$payload"
          fi