name: Generate Release Notes

on:
    release:
        types: [created]

jobs:
    update-release-notes:
        name: Update Release with Commit Notes
        runs-on: ubuntu-latest
        permissions:
            contents: write
        steps:
            - name: Check out the repo
              uses: actions/checkout@v4
              with:
                  fetch-depth: 0

            - name: Get previous tag
              id: prev_tag
              run: |
                  # Get all tags sorted by version, exclude the current tag, take the first result
                  CURRENT_TAG="${{ github.event.release.tag_name }}"
                  PREV_TAG=$(git tag --sort=-version:refname | grep -v "^${CURRENT_TAG}$" | head -n 1)

                  if [ -z "$PREV_TAG" ]; then
                    echo "No previous tag found, will use initial commit"
                    # Use the initial commit as the starting point
                    PREV_TAG=$(git rev-list --max-parents=0 HEAD)
                  fi

                  echo "Previous tag/commit: $PREV_TAG"
                  echo "tag=$PREV_TAG" >> $GITHUB_OUTPUT

            - name: Generate commit list
              id: commits
              env:
                  GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
              run: |
                  REPO_URL="https://github.com/${{ github.repository }}"
                  CURRENT_TAG="${{ github.event.release.tag_name }}"
                  PREV_TAG="${{ steps.prev_tag.outputs.tag }}"

                  # Always use range format - PREV_TAG is guaranteed to be set (either previous tag or initial commit)
                  RANGE="${PREV_TAG}..${CURRENT_TAG}"

                  echo "Generating commits for range: $RANGE"

                  # Generate commit list with format: title - @nickname - sha with link
                  # Using tformat instead of format to ensure trailing newline
                  COMMITS=""
                  while IFS='|' read -r SHA SHORT_SHA TITLE AUTHOR || [ -n "$SHA" ]; do
                    [ -z "$SHA" ] && continue

                    # Try to get GitHub username from commit API
                    USERNAME=$(gh api "repos/${{ github.repository }}/commits/${SHA}" --jq '.author.login' 2>/dev/null || echo "")

                    if [ -n "$USERNAME" ]; then
                      AUTHOR_INFO="@${USERNAME}"
                    else
                      AUTHOR_INFO="${AUTHOR}"
                    fi

                    # Check if this is a PR merge commit
                    if [[ "$TITLE" =~ ^Merge\ pull\ request\ \#([0-9]+) ]]; then
                      PR_NUMBER="${BASH_REMATCH[1]}"
                      # Get PR title
                      PR_TITLE=$(gh pr view "$PR_NUMBER" --json title --jq '.title' 2>/dev/null || echo "$TITLE")
                      COMMITS="${COMMITS}- ${PR_TITLE} (#${PR_NUMBER}) by ${AUTHOR_INFO} ([\`${SHORT_SHA}\`](${REPO_URL}/commit/${SHA}))"$'\n'
                    else
                      COMMITS="${COMMITS}- ${TITLE} by ${AUTHOR_INFO} ([\`${SHORT_SHA}\`](${REPO_URL}/commit/${SHA}))"$'\n'
                    fi
                  done < <(git log "${RANGE}" --pretty=tformat:"%H|%h|%s|%an")

                  # Handle multiline output
                  {
                    echo "list<<EOF"
                    echo "$COMMITS"
                    echo "EOF"
                  } >> $GITHUB_OUTPUT

            - name: Update Release Notes
              uses: softprops/action-gh-release@v2
              with:
                  tag_name: ${{ github.event.release.tag_name }}
                  body: |
                      ## What's Changed
                      
                      ${{ steps.commits.outputs.list }}
                      
                      **Full Changelog**: https://github.com/${{ github.repository }}/compare/${{ steps.prev_tag.outputs.tag }}...${{ github.event.release.tag_name }}
              env:
                  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

    update-dockerhub-description:
        name: Update Docker Hub Description
        runs-on: ubuntu-latest
        steps:
            - name: Check out the repo
              uses: actions/checkout@v4

            - name: Update Docker Hub description
              uses: peter-evans/dockerhub-description@v4
              with:
                  username: ${{ secrets.DOCKER_USERNAME }}
                  password: ${{ secrets.DOCKER_PASSWORD }}
                  repository: hemmeligapp/hemmelig
                  readme-filepath: ./docs/docker.md