name: Deploy PR to Remote Server

on:
  workflow_dispatch:
    inputs:
      pr_number:
        description: 'PR number to deploy'
        required: true
        type: number

concurrency:
  group: deploy-pr-${{ inputs.pr_number }}
  cancel-in-progress: true

env:
  REGISTRY: ghcr.io
  APP_IMAGE_NAME: ${{ github.repository }}
  NGINX_IMAGE_NAME: ${{ github.repository }}-nginx

jobs:
  deploy:
    runs-on: ubuntu-latest
    environment: deploy-web
    permissions:
      pull-requests: write

    steps:
      - name: Get PR details
        id: pr
        uses: actions/github-script@v7
        with:
          script: |
            const prNumber = ${{ inputs.pr_number }};
            const { data: pr } = await github.rest.pulls.get({
              owner: context.repo.owner,
              repo: context.repo.repo,
              pull_number: prNumber
            });
            core.setOutput('head_ref', pr.head.ref);
            core.setOutput('pr_number', prNumber);

      - name: Setup SSH
        run: |
          mkdir -p ~/.ssh
          echo "${{ secrets.SSH_PRIVATE_KEY }}" > ~/.ssh/deploy_key
          chmod 600 ~/.ssh/deploy_key
          ssh-keyscan -H ${{ secrets.SSH_HOST }} >> ~/.ssh/known_hosts

      - name: Deploy to remote server
        id: deploy
        run: |
          OUTPUT=$(ssh -i ~/.ssh/deploy_key -p ${{ secrets.SSH_PORT || 22 }} ${{ secrets.SSH_USERNAME }}@${{ secrets.SSH_HOST }} ${{ inputs.pr_number }})
          echo "$OUTPUT"
          DEPLOY_URL=$(echo "$OUTPUT" | tail -n 1)
          echo "url=$DEPLOY_URL" >> $GITHUB_OUTPUT

      - name: Cleanup SSH
        if: always()
        run: |
          rm -f ~/.ssh/deploy_key

      - name: Comment deployment and documentation links
        uses: marocchino/sticky-pull-request-comment@v2
        with:
          number: ${{ steps.pr.outputs.pr_number }}
          header: deployment
          message: |
            🚀 **PR deployed successfully!**

            **Website:** ${{ steps.deploy.outputs.url }}

            **Documentation:** https://${{ github.repository_owner }}.github.io/${{ github.event.repository.name }}/${{ steps.pr.outputs.head_ref }}/

            **Docker Images:**
            - App: `${{ env.REGISTRY }}/${{ env.APP_IMAGE_NAME }}:pr-${{ steps.pr.outputs.pr_number }}`
            - Nginx: `${{ env.REGISTRY }}/${{ env.NGINX_IMAGE_NAME }}:pr-${{ steps.pr.outputs.pr_number }}`

      - name: Remove awaiting-deployment label
        if: always()
        uses: actions/github-script@v7
        with:
          script: |
            try {
              await github.rest.issues.removeLabel({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: ${{ steps.pr.outputs.pr_number }},
                name: 'awaiting-deployment'
              });
            } catch (error) {
              console.log('Label may have already been removed');
            }