name: Release

on:
  push:
    tags:
      - 'content/*'
  workflow_dispatch:
    inputs:
      tag:
        description: 'Tag to create a release for (e.g., content/v1.0.0)'
        required: true
        type: string

jobs:
  release:
    name: Create GitHub Release
    runs-on: ubuntu-latest

    permissions:
      contents: write

    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Resolve tag and version
        id: resolve
        run: |
          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
            TAG="${{ github.event.inputs.tag }}"
          else
            TAG="${{ github.ref_name }}"
          fi
          echo "tag=$TAG" >> $GITHUB_OUTPUT
          echo "Resolved tag: $TAG"

      - name: Generate changelog
        id: changelog
        run: |
          TAG="${{ steps.resolve.outputs.tag }}"
          PREV_TAG=$(git tag --list "content/*" --sort=-version:refname | grep -v "^${TAG}$" | head -1 || true)
          if [ -n "$PREV_TAG" ]; then
            echo "Generating changelog from $PREV_TAG to $TAG"
            CHANGELOG=$(git log "$PREV_TAG..$TAG" --pretty=format:"- %s (%h)" --no-merges 2>/dev/null || echo "- Initial release")
          else
            echo "No previous tag found — using full log"
            CHANGELOG=$(git log --pretty=format:"- %s (%h)" --no-merges 2>/dev/null | head -50 || echo "- Initial release")
          fi
          [ -z "$CHANGELOG" ] && CHANGELOG="- No changes logged"
          DELIM=$(openssl rand -hex 8)
          echo "changelog<<$DELIM" >> $GITHUB_OUTPUT
          echo "$CHANGELOG"        >> $GITHUB_OUTPUT
          echo "$DELIM"            >> $GITHUB_OUTPUT

      - name: Create GitHub Release
        uses: softprops/action-gh-release@v2
        with:
          tag_name: ${{ steps.resolve.outputs.tag }}
          name: ${{ steps.resolve.outputs.tag }}
          body: |
            ## The Collective Hub — ${{ steps.resolve.outputs.tag }}

            ### What's Changed
            ${{ steps.changelog.outputs.changelog }}
          token: ${{ secrets.GITHUB_TOKEN }}