name: Create Release

on:
    push:
        branches:
            - main
            - 'dev/*'
        paths:
            - 'package.json'
    workflow_dispatch: # Allows manual execution of the workflow.

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

            - name: Set up Node.js
              uses: actions/setup-node@v4
              with:
                  node-version: '20.8.0'

            - name: Install dependencies, run tests and build
              run: npm run prepare:deploy

            - name: Get the version
              id: get_version
              run: |
                  VERSION=$(npm run version:show | tail -n 1)
                  echo "VERSION=v$VERSION" >> $GITHUB_ENV
              shell: bash

            - name: Get previous release tag
              id: get_previous_release
              run: |
                  echo "Fetching previous release tag..."
                  previous_tag=$(git describe --tags --abbrev=0 HEAD^ 2>/dev/null || echo "")
                  if [ -z "$previous_tag" ]; then
                    echo "No previous tag found, using initial commit."
                    previous_tag=$(git rev-list --max-parents=0 HEAD)
                  fi
                  echo "Previous tag: $previous_tag"
                  echo "PREVIOUS_TAG=$previous_tag" >> $GITHUB_ENV
              shell: bash

            - name: Check if version changed
              id: check_version
              run: |
                  # Check if the version already exists as a tag
                  if git rev-parse "refs/tags/${{ env.VERSION }}" >/dev/null 2>&1; then
                    echo "skip_release=true" >> $GITHUB_OUTPUT
                    echo "Version ${{ env.VERSION }} already exists as a tag. No release will be created."
                    exit 0
                  fi

                  # Compare current version with previous tag
                  if [ "${{ env.VERSION }}" == "${{ env.PREVIOUS_TAG }}" ]; then
                    echo "skip_release=true" >> $GITHUB_OUTPUT
                    echo "Version has not changed. No release will be created."
                    exit 0
                  fi
                  echo "skip_release=false" >> $GITHUB_OUTPUT
              shell: bash

            - name: Generate release notes
              id: generate_notes
              if: steps.check_version.outputs.skip_release == 'false'
              run: |
                  echo "Generating release notes from ${{ env.PREVIOUS_TAG }} to HEAD..."
                  repo_url=$(git config --get remote.origin.url)
                  notes=$(git log ${{ env.PREVIOUS_TAG }}..HEAD --pretty=format:"- [\`%h\`]($repo_url/commit/%H): %s%n")
                  echo "See [CHANGELOG.md](./CHANGELOG.md) for more details."
                  echo "$notes"
                  echo ""
                  echo "### Changes in this release" > release_notes.md
                  echo "$notes" >> release_notes.md
              shell: bash

            - name: Set Git user
              if: steps.check_version.outputs.skip_release == 'false'
              run: |
                  git config --local user.name "GitHub Actions"
                  git config --local user.email "actions@github.com"
              shell: bash

            - name: Create and push tag
              id: create_tag
              if: steps.check_version.outputs.skip_release == 'false'
              run: |
                  git tag ${{ env.VERSION }}
                  git push origin ${{ env.VERSION }}
              env:
                  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
              shell: bash

            - name: Set Release Prerelease Flag
              id: set_prerelease_flag
              run: |
                  if [[ "${{ github.ref }}" == "refs/heads/main" ]]; then
                    echo "PRE_RELEASE=false" >> $GITHUB_ENV
                  elif [[ "${{ github.ref }}" == refs/heads/dev/* ]]; then
                    echo "PRE_RELEASE=true" >> $GITHUB_ENV
                  fi

            - name: Release
              if: steps.check_version.outputs.skip_release == 'false'
              uses: softprops/action-gh-release@v2
              with:
                  tag_name: ${{ env.VERSION }}
                  name: Release ${{ env.VERSION }}
                  body_path: release_notes.md
                  prerelease: ${{ env.PRE_RELEASE }}
              env:
                  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}