name: Create Release

on:
  push:
    tags: ['v*']

permissions:
  contents: write

jobs:
  release:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Get previous tag
        id: prev_tag
        run: |
          # Get all tags sorted by version, find the one before current
          CURRENT_TAG=${GITHUB_REF#refs/tags/}
          PREV_TAG=$(git tag --sort=-v:refname | grep -A1 "^${CURRENT_TAG}$" | tail -1)
          
          # If no previous tag found (first release), use empty
          if [ "$PREV_TAG" = "$CURRENT_TAG" ]; then
            PREV_TAG=""
          fi
          
          echo "previous_tag=$PREV_TAG" >> $GITHUB_OUTPUT
          echo "Current tag: $CURRENT_TAG, Previous tag: $PREV_TAG"

      - name: Generate changelog
        id: changelog
        run: |
          PREV_TAG="${{ steps.prev_tag.outputs.previous_tag }}"
          
          if [ -z "$PREV_TAG" ]; then
            # First release - get all commits
            CHANGES=$(git log --pretty=format:"- %s" HEAD)
          else
            # Get commits since last tag
            CHANGES=$(git log --pretty=format:"- %s" ${PREV_TAG}..HEAD)
          fi
          
          # Write to file for multiline support
          echo "$CHANGES" > changelog.txt

      - name: Create Release
        uses: softprops/action-gh-release@v1
        with:
          body_path: changelog.txt
          generate_release_notes: false
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}