# LocalGreenChain Preview Deployments
# Agent 4: Production Deployment
#
# Creates preview deployments for pull requests

name: Preview Deployment

on:
  pull_request:
    types: [opened, synchronize, reopened]

concurrency:
  group: preview-${{ github.event.pull_request.number }}
  cancel-in-progress: true

jobs:
  # ==========================================================================
  # Build Preview
  # ==========================================================================
  build:
    name: Build Preview
    runs-on: ubuntu-latest
    timeout-minutes: 15

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

      - name: Setup Bun
        uses: oven-sh/setup-bun@v1
        with:
          bun-version: latest

      - name: Install dependencies
        run: bun install --frozen-lockfile

      - name: Build application
        run: bun run build
        env:
          NEXT_TELEMETRY_DISABLED: 1
          NEXT_PUBLIC_API_URL: https://preview-${{ github.event.pull_request.number }}.localgreenchain.dev

      - name: Upload build artifacts
        uses: actions/upload-artifact@v4
        with:
          name: preview-build
          path: |
            .next/
            public/
            package.json
            next.config.js
          retention-days: 7

  # ==========================================================================
  # Deploy Preview
  # ==========================================================================
  deploy:
    name: Deploy Preview
    runs-on: ubuntu-latest
    timeout-minutes: 10
    needs: [build]
    permissions:
      pull-requests: write

    steps:
      - name: Download build artifacts
        uses: actions/download-artifact@v4
        with:
          name: preview-build

      - name: Deploy preview
        id: deploy
        run: |
          # Add your preview deployment logic here
          # Examples: Vercel, Netlify, or custom solution

          PREVIEW_URL="https://preview-${{ github.event.pull_request.number }}.localgreenchain.dev"
          echo "preview_url=${PREVIEW_URL}" >> $GITHUB_OUTPUT
          echo "Deployed to: ${PREVIEW_URL}"

      - name: Comment on PR
        uses: actions/github-script@v7
        with:
          script: |
            const previewUrl = '${{ steps.deploy.outputs.preview_url }}';

            // Find existing comment
            const comments = await github.rest.issues.listComments({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
            });

            const botComment = comments.data.find(comment =>
              comment.user.type === 'Bot' &&
              comment.body.includes('Preview Deployment')
            );

            const body = `## 🚀 Preview Deployment

            | Status | URL |
            |--------|-----|
            | ✅ Ready | [${previewUrl}](${previewUrl}) |

            **Commit:** \`${context.sha.substring(0, 7)}\`
            **Updated:** ${new Date().toISOString()}

            ---
            <sub>This preview will be automatically deleted when the PR is closed.</sub>`;

            if (botComment) {
              await github.rest.issues.updateComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                comment_id: botComment.id,
                body: body
              });
            } else {
              await github.rest.issues.createComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: context.issue.number,
                body: body
              });
            }

  # ==========================================================================
  # Cleanup on PR Close
  # ==========================================================================
  cleanup:
    name: Cleanup Preview
    runs-on: ubuntu-latest
    if: github.event.action == 'closed'

    steps:
      - name: Delete preview deployment
        run: |
          echo "Cleaning up preview deployment for PR #${{ github.event.pull_request.number }}"
          # Add your cleanup logic here