name: 'PR into Dev'

on:
  pull_request:
    types: [opened, reopened, synchronize, ready_for_review]
    branches:
      - dev

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

jobs:
  validate-pr:
    name: Validate PR Structure
    runs-on: ubuntu-latest
    if: github.event.pull_request.draft == false

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

      - name: Fork safety check
        id: fork-check
        uses: ./.github/actions/fork-safety
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}

      - name: Validate branch name
        id: branch-name
        run: |
          BRANCH_NAME="${{ github.head_ref }}"
          echo "Branch name: $BRANCH_NAME"

          # Valid prefixes for dev branch
          VALID_PREFIXES="feature/ fix/ hotfix/ test/ refactor/ docs/"

          VALID=false
          for prefix in $VALID_PREFIXES; do
            if [[ "$BRANCH_NAME" == $prefix* ]]; then
              VALID=true
              echo "✅ Branch name is valid (starts with $prefix)"
              break
            fi
          done

          if [ "$VALID" = false ]; then
            echo "::error::Invalid branch name: $BRANCH_NAME"
            echo "::error::Branch must start with one of: $VALID_PREFIXES"
            echo "valid=false" >> $GITHUB_OUTPUT
            exit 1
          else
            echo "valid=true" >> $GITHUB_OUTPUT
          fi

      - name: Validate PR title (Conventional Commits)
        id: pr-title
        run: |
          PR_TITLE="${{ github.event.pull_request.title }}"
          echo "PR Title: $PR_TITLE"

          # Conventional commit format: type(scope): subject
          # Valid types: feat, fix, docs, style, refactor, perf, test, build, ci, chore, revert
          if [[ ! "$PR_TITLE" =~ ^(feat|fix|docs|style|refactor|perf|test|build|ci|chore|revert)(\(.+\))?:\ .+ ]]; then
            echo "::error::PR title does not follow Conventional Commits format"
            echo "::error::Format: type(scope): subject"
            echo "::error::Example: feat(installer): add Windows PowerShell support"
            echo "::error::Valid types: feat, fix, docs, style, refactor, perf, test, build, ci, chore, revert"
            echo "valid=false" >> $GITHUB_OUTPUT
            exit 1
          else
            echo "✅ PR title follows Conventional Commits format"
            echo "valid=true" >> $GITHUB_OUTPUT
          fi

      - name: Check for linked issues
        id: linked-issues
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          PR_NUMBER="${{ github.event.pull_request.number }}"
          PR_BODY="${{ github.event.pull_request.body }}"

          echo "Checking for linked issues in PR #$PR_NUMBER"

          # Check for keywords like "Closes", "Fixes", "Resolves", "Relates to"
          ISSUE_KEYWORDS="Closes|Fixes|Resolves|Relates to|Ref|References"

          if echo "$PR_BODY" | grep -qiE "($ISSUE_KEYWORDS) #[0-9]+"; then
            echo "✅ Found linked issue(s) in PR body"
            echo "has-linked-issues=true" >> $GITHUB_OUTPUT
          else
            echo "::warning::No linked issues found in PR body"
            echo "::warning::Please link at least one issue using keywords: Closes #123, Fixes #456, etc."
            echo "has-linked-issues=false" >> $GITHUB_OUTPUT
            # Not failing, just warning
          fi

      - name: Comment on validation failure
        if: failure() && steps.fork-check.outputs.should-skip-writes != 'true'
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const branchValid = '${{ steps.branch-name.outputs.valid }}';
            const titleValid = '${{ steps.pr-title.outputs.valid }}';

            let comment = '## ❌ PR Validation Failed\n\n';

            if (branchValid !== 'true') {
              comment += '### Branch Name\n';
              comment += '- ❌ Branch name must start with: `feature/`, `fix/`, `hotfix/`, `test/`, `refactor/`, or `docs/`\n';
              comment += `- Current branch: \`${{ github.head_ref }}\`\n\n`;
            }

            if (titleValid !== 'true') {
              comment += '### PR Title\n';
              comment += '- ❌ PR title must follow Conventional Commits format\n';
              comment += '- Format: `type(scope): subject`\n';
              comment += '- Example: `feat(installer): add Windows PowerShell support`\n';
              comment += '- Valid types: `feat`, `fix`, `docs`, `style`, `refactor`, `perf`, `test`, `build`, `ci`, `chore`, `revert`\n\n';
            }

            comment += '### How to Fix\n\n';
            comment += '1. Rename your branch if needed: `git branch -m new-branch-name`\n';
            comment += '2. Update PR title to follow Conventional Commits format\n';
            comment += '3. Push changes and re-run checks\n\n';
            comment += '📚 See [CONTRIBUTING.md](../blob/main/docs/CONTRIBUTING.md) for more details.';

            await github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
              body: comment
            });

  quality-checks:
    name: Run Quality Checks
    needs: validate-pr
    uses: ./.github/workflows/reusable-pr-checks.yml
    with:
      python-version: '3.11'
      skip-python: false
      skip-markdown: false
      skip-bash: false
      skip-secrets: false

  pr-summary:
    name: PR Summary
    needs: [validate-pr, quality-checks]
    runs-on: ubuntu-latest
    if: always()

    steps:
      - name: Generate summary
        run: |
          echo "## 📋 PR into Dev - Summary" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "### Validation Results" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY

          if [[ "${{ needs.validate-pr.result }}" == "success" ]]; then
            echo "- ✅ PR structure validated" >> $GITHUB_STEP_SUMMARY
          else
            echo "- ❌ PR structure validation failed" >> $GITHUB_STEP_SUMMARY
          fi

          if [[ "${{ needs.quality-checks.result }}" == "success" ]]; then
            echo "- ✅ Quality checks passed" >> $GITHUB_STEP_SUMMARY
          else
            echo "- ❌ Quality checks failed" >> $GITHUB_STEP_SUMMARY
          fi

          echo "" >> $GITHUB_STEP_SUMMARY

          if [[ "${{ needs.validate-pr.result }}" == "success" ]] && [[ "${{ needs.quality-checks.result }}" == "success" ]]; then
            echo "### ✅ All checks passed! PR is ready for review." >> $GITHUB_STEP_SUMMARY
          else
            echo "### ❌ Some checks failed. Please review and fix before merging." >> $GITHUB_STEP_SUMMARY
          fi