name: Feature PR

# Auto-create PR from dev/* branches to develop
# This is the entry point for new features into the staging pipeline

on:
  push:
    branches:
      - "dev/**"
      - "feature/**"
      - "fix/**"

concurrency:
  group: feature-pr-${{ github.ref_name }}
  cancel-in-progress: true

permissions:
  contents: write
  pull-requests: write

jobs:
  create-pr:
    name: Create PR to develop
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Ensure develop branch exists
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          if git ls-remote --heads origin develop | grep -q develop; then
            echo "develop branch already exists"
          else
            echo "develop branch does not exist — creating from main"
            git push origin origin/main:refs/heads/develop
          fi

      - name: Check for existing PR
        id: check-pr
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          BRANCH="${{ github.ref_name }}"
          TARGET="develop"

          # Check if PR already exists
          EXISTING=$(gh pr list --head "$BRANCH" --base "$TARGET" --json number --jq '.[0].number // empty')

          if [ -n "$EXISTING" ]; then
            echo "exists=true" >> $GITHUB_OUTPUT
            echo "pr_number=$EXISTING" >> $GITHUB_OUTPUT
            echo "PR #$EXISTING already exists for $BRANCH → $TARGET"
          else
            echo "exists=false" >> $GITHUB_OUTPUT
          fi

      - name: Create PR
        if: steps.check-pr.outputs.exists != 'true'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          BRANCH="${{ github.ref_name }}"
          TARGET="develop"

          # Extract title from branch name (dev/foo-bar → foo bar)
          TITLE=$(echo "$BRANCH" | sed 's|^dev/||; s|^feature/||; s|^fix/||; s|-| |g; s|_| |g')

          # Capitalize first letter
          TITLE="$(echo "${TITLE:0:1}" | tr '[:lower:]' '[:upper:]')${TITLE:1}"

          # Create PR body
          BODY=$(cat << 'PRBODY'
          Auto-created PR from feature branch.

          ## Changes

          <!-- Describe your changes here -->

          ---
          *This PR was auto-created by the feature-pr workflow.*
          PRBODY
          )

          gh pr create \
            --base "$TARGET" \
            --head "$BRANCH" \
            --title "$TITLE" \
            --body "$BODY"

          echo "Created PR: $BRANCH → $TARGET"