name: Promote Beta to Stable

on:
  workflow_dispatch:
    inputs:
      version:
        description: "Version to promote (format: 0.0.0)"
        required: true
        type: string

jobs:
  promote-beta-to-stable:
    name: Promote Beta to Stable
    runs-on: ubuntu-latest

    steps:
      - name: Check out repository
        uses: actions/checkout@v4
        with:
          token: ${{ secrets.PAT }} # Uses Personal Access Token for branch operations

      - name: Validate version format
        id: validate_version
        run: |
          VERSION="${{ github.event.inputs.version }}"
          if [[ ! "$VERSION" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
            echo "❌ ERROR: Version must be in '0.0.0' format."
            exit 1
          fi
          echo "✅ Version format validated: $VERSION"

      - name: Check if beta branch exists
        id: check_beta_branch
        run: |
          VERSION="${{ github.event.inputs.version }}"
          BETA_BRANCH="beta/v$VERSION"

          if ! git ls-remote --exit-code origin "$BETA_BRANCH"; then
            echo "❌ ERROR: Beta branch '$BETA_BRANCH' does not exist!"
            exit 1
          fi
          echo "✅ Beta branch '$BETA_BRANCH' exists."

      - name: Check if stable branch already exists
        id: check_stable_branch
        run: |
          VERSION="${{ github.event.inputs.version }}"
          STABLE_BRANCH="stable/v$VERSION"

          if git ls-remote --exit-code origin "$STABLE_BRANCH"; then
            echo "❌ ERROR: Stable branch '$STABLE_BRANCH' already exists!"
            exit 1
          fi
          echo "✅ Stable branch '$STABLE_BRANCH' does not exist."

      - name: Create and push new stable branch
        run: |
          VERSION="${{ github.event.inputs.version }}"
          BETA_BRANCH="beta/v$VERSION"
          STABLE_BRANCH="stable/v$VERSION"

          # Fetch latest changes
          git fetch origin "$BETA_BRANCH"

          # Create new stable branch from beta branch
          git checkout -b "$STABLE_BRANCH" origin/"$BETA_BRANCH"

          # Push new stable branch to remote
          git push origin "$STABLE_BRANCH"

          echo "✅ Successfully created stable branch '$STABLE_BRANCH' from '$BETA_BRANCH'."

      - name: Merge beta into stable
        run: |
          VERSION="${{ github.event.inputs.version }}"
          BETA_BRANCH="beta/v$VERSION"
          STABLE_BRANCH="stable/v$VERSION"

          # Checkout stable branch
          git checkout "$STABLE_BRANCH"

          # Merge beta into stable
          git merge --no-ff "origin/$BETA_BRANCH" -m "Merge $BETA_BRANCH into $STABLE_BRANCH"

          # Push merge changes
          git push origin "$STABLE_BRANCH"

          echo "✅ Successfully merged '$BETA_BRANCH' into '$STABLE_BRANCH'."

      - name: Delete beta branch after successful merge
        run: |
          VERSION="${{ github.event.inputs.version }}"
          BETA_BRANCH="beta/v$VERSION"

          # Delete beta branch locally and remotely
          git branch -d "$BETA_BRANCH"
          git push origin --delete "$BETA_BRANCH"

          echo "✅ Successfully deleted '$BETA_BRANCH'."

      - name: Create Pull Request to Main
        uses: peter-evans/create-pull-request@v6
        with:
          token: ${{ secrets.PAT }}
          commit-message: "Promote stable/v${{ github.event.inputs.version }} to main"
          title: "Promote stable/v${{ github.event.inputs.version }} to main"
          body: "This PR promotes stable/v${{ github.event.inputs.version }} to the main branch."
          base: main
          branch: stable/v${{ github.event.inputs.version }}
          delete-branch: false