name: Deploy Preview

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

jobs:
  deploy:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - uses: pnpm/action-setup@v4

      - uses: actions/setup-node@v4
        with:
          node-version: 20
          cache: pnpm

      - run: pnpm install --frozen-lockfile

      - name: Determine changed apps
        id: changes
        run: |
          APPS=$(pnpm turbo build --filter='...[origin/main]' --dry-run=json | jq -r '[.packages[] | select(startswith("@homelab/")) | sub("@homelab/";"") ] | join(",")')
          echo "apps=$APPS" >> "$GITHUB_OUTPUT"

      - name: Build and push images
        if: steps.changes.outputs.apps != ''
        run: |
          echo "${{ secrets.GITEA_TOKEN }}" | docker login gitea.coreworlds.io -u ${{ gitea.actor }} --password-stdin
          IFS=',' read -ra APPS <<< "${{ steps.changes.outputs.apps }}"
          for app in "${APPS[@]}"; do
            docker build \
              -t gitea.coreworlds.io/lazorgurl/homelab-${app}:${{ gitea.sha }} \
              apps/${app}
            docker push gitea.coreworlds.io/lazorgurl/homelab-${app}:${{ gitea.sha }}
          done

      - name: Update image tags in preview overlay
        if: steps.changes.outputs.apps != ''
        run: |
          IFS=',' read -ra APPS <<< "${{ steps.changes.outputs.apps }}"
          for app in "${APPS[@]}"; do
            cd apps/${app}/k8s/overlays/preview
            kustomize edit set image gitea.coreworlds.io/lazorgurl/homelab-${app}=gitea.coreworlds.io/lazorgurl/homelab-${app}:${{ gitea.sha }}
            cd -
          done

      - name: Comment preview URL
        uses: actions/github-script@v7
        with:
          script: |
            const { owner, repo } = context.repo;
            const issue_number = context.issue.number;
            const body = `## Preview Deploy\nNamespace: \`preview-${issue_number}\`\nArgoCD will sync automatically from branch \`${context.payload.pull_request.head.ref}\`.`;
            await fetch(`${process.env.GITHUB_API_URL}/repos/${owner}/${repo}/issues/${issue_number}/comments`, {
              method: 'POST',
              headers: {
                'Authorization': `token ${process.env.GITHUB_TOKEN}`,
                'Content-Type': 'application/json'
              },
              body: JSON.stringify({ body })
            });