name: Release

on:
  workflow_dispatch:
    inputs:
      tag:
        description: 'Release tag (e.g., v0.0.0)'
        required: true
        default: 'v0.0.0'
        type: string
      confirm:
        description: 'Type "CONFIRM" to proceed with the release'
        required: true
        type: string

permissions:
  contents: write
  pull-requests: write

jobs:
  validate:
    runs-on: ubuntu-latest
    steps:
      - name: Validate confirmation
        if: ${{ github.event.inputs.confirm != 'CONFIRM' }}
        run: |
          echo "::error::You must type 'CONFIRM' to proceed with the release"
          exit 1

      - name: Validate tag format
        run: |
          TAG="${{ github.event.inputs.tag }}"
          if [[ ! $TAG =~ ^v[0-9]+\.[0-9]+\.[0-9]+(-.*)?$ ]]; then
            echo "::error::Tag must be in format vX.Y.Z or vX.Y.Z-suffix (e.g., v1.0.0 or v1.0.0-rc1)"
            exit 1
          fi

  release:
    needs: validate
    runs-on: ubuntu-latest
    outputs:
      tag: ${{ steps.tag-release.outputs.tag }}
    
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: Configure Git
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"

      - name: Switch to next branch
        run: |
          git checkout next
          git pull origin next

      - name: Check next branch is up-to-date with main
        id: branch-check
        run: |
          echo "Checking if next branch is up-to-date with main..."
          
          # Fetch latest main branch
          git fetch origin main
          
          # Check if next is behind main
          BEHIND_COUNT=$(git rev-list --count next..origin/main)
          AHEAD_COUNT=$(git rev-list --count origin/main..next)
          
          echo "Next branch is ${AHEAD_COUNT} commits ahead of main"
          echo "Next branch is ${BEHIND_COUNT} commits behind main"
          
          if [ "$BEHIND_COUNT" -gt 0 ]; then
            echo "::error::❌ Next branch is ${BEHIND_COUNT} commits behind main. Please update next branch with the latest changes from main before creating a release."
            echo "To fix this, run: git checkout next && git merge main"
            exit 1
          fi
          
          if [ "$AHEAD_COUNT" -eq 0 ]; then
            echo "::warning::⚠️  Next branch has no new commits compared to main. Are you sure you want to create a release?"
          fi
          
          echo "✅ Next branch is up-to-date with main (${AHEAD_COUNT} commits ahead)"
          echo "branch-check-success=true" >> $GITHUB_OUTPUT

      - name: Check if tag already exists
        run: |
          TAG="${{ github.event.inputs.tag }}"
          if git tag -l | grep -q "^${TAG}$"; then
            echo "::error::Tag ${TAG} already exists"
            exit 1
          fi
          if git ls-remote --tags origin | grep -q "refs/tags/${TAG}$"; then
            echo "::error::Tag ${TAG} already exists on remote"
            exit 1
          fi

      - name: Tag the release
        id: tag-release
        run: |
          TAG="${{ github.event.inputs.tag }}"
          git tag -a "${TAG}" -m "Release ${TAG}"
          echo "✅ Created tag ${TAG}"
          echo "tag=${TAG}" >> $GITHUB_OUTPUT

      - name: Push tag
        run: |
          TAG="${{ github.event.inputs.tag }}"
          git push origin "${TAG}"
          echo "✅ Pushed tag ${TAG}"

      - name: Wait for release to be created
        run: |
          TAG="${{ github.event.inputs.tag }}"
          echo "Waiting for GitHub to create the draft release..."
          
          # Wait up to 2 minutes for the release to appear
          for i in {1..24}; do
            if gh release view "${TAG}" >/dev/null 2>&1; then
              echo "✅ Draft release created"
              break
            fi
            echo "Waiting for release to be created... (${i}/24)"
            sleep 5
          done
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

  summary:
    needs: [validate, release]
    runs-on: ubuntu-latest
    if: always() && needs.release.result == 'success'
    
    steps:
      - name: Release Summary
        run: |
          TAG="${{ needs.release.outputs.tag }}"
          
          echo "## 🎉 Release $TAG has been initiated!"
          echo ""
          echo "### Next steps:"
          echo "1. 📋 Check https://github.com/${{ github.repository }}/releases for the draft release to show up"
          echo "2. ✏️  Edit the new release, delete the existing notes and click the auto-generate button GitHub provides"
          echo "3. ✨ Add a section at the top calling out the main features"
          echo "4. 🚀 Publish the release"
          echo "5. � Create a Pull Request from 'next' to 'main' branch with title 'Release $TAG'"
          echo "6. �🔀 Merge the pull request into main"
          echo "7. 📢 Post message in #gh-mcp-releases channel in Slack and then share to the other mcp channels"
          echo ""
          echo "### Resources:"
          echo "- 📦 Draft Release: https://github.com/${{ github.repository }}/releases/tag/$TAG"
          echo "- 🔄 Create PR: https://github.com/${{ github.repository }}/compare/main...next"
          echo ""
          echo "The release process is now ready for your review and completion!"
          
          # Also output as job summary
          cat << EOF >> $GITHUB_STEP_SUMMARY
          ## 🎉 Release $TAG has been initiated!
          
          ### Next steps:
          1. 📋 Check [releases page](https://github.com/${{ github.repository }}/releases) for the draft release to show up
          2. ✏️  Edit the new release, delete the existing notes and click the auto-generate button GitHub provides  
          3. ✨ Add a section at the top calling out the main features
          4. 🚀 Publish the release
          5. � [Create a Pull Request](https://github.com/${{ github.repository }}/compare/main...next) from 'next' to 'main' branch with title 'Release $TAG'
          6. �🔀 Merge the pull request into main
          7. 📢 Post message in #gh-mcp-releases channel in Slack and then share to the other mcp channels
          
          ### Resources:
          - 📦 [Draft Release](https://github.com/${{ github.repository }}/releases/tag/$TAG)
          - 🔄 [Create PR](https://github.com/${{ github.repository }}/compare/main...next)
          
          The release process is now ready for your review and completion!
          EOF