name: PR Validation

on:
  pull_request:
    types: [opened, synchronize, reopened, labeled, unlabeled]
    branches:
      - main

permissions:
  contents: read
  pull-requests: write
  checks: write

jobs:
  quality-gates:
    name: Quality Gates
    runs-on: ubuntu-latest
    
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Wait for CI checks
        uses: lewagon/wait-on-check-action@v1.3.1
        with:
          ref: ${{ github.event.pull_request.head.sha }}
          check-name: 'Test'
          repo-token: ${{ secrets.GITHUB_TOKEN }}
          wait-interval: 10

      - name: Check required status checks
        uses: actions/github-script@v7
        continue-on-error: true
        with:
          script: |
            const { data: checks } = await github.rest.checks.listForRef({
              owner: context.repo.owner,
              repo: context.repo.repo,
              ref: context.payload.pull_request.head.sha
            });

            const requiredChecks = ['Test', 'CodeQL Analysis'];
            const optionalChecks = ['Quality Analysis', 'Deploy Preview'];
            const failedChecks = [];
            const passedChecks = [];

            // Check required workflows
            for (const checkName of requiredChecks) {
              const check = checks.check_runs.find(c => c.name === checkName);
              if (check && check.conclusion === 'success') {
                passedChecks.push(checkName);
              } else {
                failedChecks.push(checkName);
              }
            }

            // Report optional checks
            for (const checkName of optionalChecks) {
              const check = checks.check_runs.find(c => c.name === checkName);
              if (check && check.conclusion === 'success') {
                passedChecks.push(`${checkName} (optional)`);
              }
            }

            console.log(`✅ Passed checks: ${passedChecks.join(', ')}`);
            
            if (failedChecks.length > 0) {
              console.log(`❌ Failed required checks: ${failedChecks.join(', ')}`);
              core.setFailed(`Required checks failed: ${failedChecks.join(', ')}`);
            } else {
              console.log(`✅ All required checks passed!`);
            }

  validate-release:
    name: Release Validation
    runs-on: ubuntu-latest
    needs: quality-gates

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Validate PR Labels
        run: |
          if [[ "${{ contains(github.event.pull_request.labels.*.name, 'stable-release') }}" == "true" ]]; then
            echo "✓ PR has stable-release label"
            
            # Check version bump labels
            if [[ "${{ contains(github.event.pull_request.labels.*.name, 'major') }}" == "true" ]]; then
              echo "✓ Major version bump requested"
            elif [[ "${{ contains(github.event.pull_request.labels.*.name, 'minor') }}" == "true" ]]; then
              echo "✓ Minor version bump requested"
            else
              echo "✓ Patch version bump will be applied"
            fi
          else
            echo "This PR doesn't have the stable-release label. No release will be created." 
          fi

      - name: Check breaking changes
        if: contains(github.event.pull_request.labels.*.name, 'major')
        run: |
          echo "⚠️ This PR contains breaking changes and will trigger a major release."
          
      - name: Validate changelog entry
        if: contains(github.event.pull_request.labels.*.name, 'stable-release')
        run: |
          if ! grep -q "${{ github.event.pull_request.number }}" CHANGES.md; then
            echo "❌ No changelog entry found for PR #${{ github.event.pull_request.number }}"
            echo "Please add an entry to CHANGES.md"
            exit 1
          else
            echo "✓ Changelog entry found"
          fi

  security-review:
    name: Security Review Required
    runs-on: ubuntu-latest
    if: contains(github.event.pull_request.labels.*.name, 'security')
    
    steps:
      - name: Check security label
        run: |
          echo "🔒 This PR has security implications and requires additional review"
          echo "Ensure a security team member has approved this PR before merging"