name: Site Deploy (Preview CD)

on:
  workflow_run:
    workflows: ["Site Deploy (Preview CI)"]
    types:
      - completed

jobs:
  preview-cd:
    runs-on: ubuntu-latest
    concurrency:
      group: pull-request-preview-${{ github.event.workflow_run.head_repository.full_name }}-${{ github.event.workflow_run.head_branch }}
      cancel-in-progress: true

    if: ${{ github.event.workflow_run.conclusion == 'success' }}

    environment: pull request

    permissions:
      actions: read
      statuses: write
      pull-requests: write

    steps:
      - name: Set Commit Status
        uses: actions/github-script@v7
        with:
          script: |
            github.rest.repos.createCommitStatus({
              owner: context.repo.owner,
              repo: context.repo.repo,
              sha: context.payload.workflow_run.head_sha,
              context: 'Website Preview',
              description: 'Deploying...',
              state: 'pending',
            })

      - name: Download Artifact
        uses: actions/download-artifact@v4
        with:
          name: website-preview
          github-token: ${{ secrets.GITHUB_TOKEN }}
          run-id: ${{ github.event.workflow_run.id }}

      - name: Restore Context
        run: |
          PR_NUMBER=$(cat ./pr-number)
          if ! [[ "${PR_NUMBER}" =~ ^[0-9]+$ ]]; then
            echo "Invalid PR number: ${PR_NUMBER}"
            exit 1
          fi
          echo "PR_NUMBER=${PR_NUMBER}" >> "${GITHUB_ENV}"

      - name: Set Deploy Name
        run: |
          echo "DEPLOY_NAME=deploy-preview-${PR_NUMBER}" >> "${GITHUB_ENV}"

      - name: Deploy to Netlify
        id: deploy
        uses: nwtgck/actions-netlify@v3
        with:
          publish-dir: ./website/build
          production-deploy: false
          deploy-message: "Deploy ${{ env.DEPLOY_NAME }}@${{ github.event.workflow_run.head_sha }}"
          alias: ${{ env.DEPLOY_NAME }}
        env:
          NETLIFY_AUTH_TOKEN: ${{ secrets.NETLIFY_AUTH_TOKEN }}
          NETLIFY_SITE_ID: ${{ secrets.SITE_ID }}

      # action netlify has no pull request context, so we need to comment by ourselves
      - name: Comment on Pull Request
        uses: marocchino/sticky-pull-request-comment@v2
        with:
          header: website
          number: ${{ env.PR_NUMBER }}
          message: |
            :rocket: Deployed to ${{ steps.deploy.outputs.deploy-url }}

      - name: Set Commit Status
        uses: actions/github-script@v7
        if: always()
        with:
          script: |
            if (`${{ job.status }}` === 'success') {
              github.rest.repos.createCommitStatus({
                owner: context.repo.owner,
                repo: context.repo.repo,
                sha: context.payload.workflow_run.head_sha,
                context: 'Website Preview',
                description: `Deployed to ${{ steps.deploy.outputs.deploy-url }}`,
                state: 'success',
                target_url: `${{ steps.deploy.outputs.deploy-url }}`,
              })
            } else {
              github.rest.repos.createCommitStatus({
                owner: context.repo.owner,
                repo: context.repo.repo,
                sha: context.payload.workflow_run.head_sha,
                context: 'Website Preview',
                description: `Deploy ${{ job.status }}`,
                state: 'failure',
              })
            }