name: rollback

on:
  workflow_dispatch:
    inputs:
      target_tag:
        description: 'Target release tag to rollback to (e.g. v1.2.3)'
        required: true
      component:
        description: 'Component (backend / frontend / timescaledb2 / rabbitmq3 / all)'
        required: true
        default: 'all'

env:
  REGISTRY: 192.168.30.181:3000
  REPO_PATH: wpic-dev/datahub

jobs:
  retag:
    runs-on: podman
    steps:
      - name: Validate target_tag format
        run: |
          if [[ ! "${{ inputs.target_tag }}" =~ ^v[0-9]+\.[0-9]+\.[0-9]+(-[a-zA-Z0-9.]+)?$ ]]; then
            echo "::error::target_tag must match semver pattern v<MAJOR>.<MINOR>.<PATCH>[-suffix]"
            exit 1
          fi

      - name: Validate component
        run: |
          case "${{ inputs.component }}" in
            backend|frontend|timescaledb2|rabbitmq3|all) ;;
            *)
              echo "::error::component must be one of: backend / frontend / timescaledb2 / rabbitmq3 / all"
              exit 1
              ;;
          esac

      - name: Login to Gitea Registry
        run: |
          echo "${{ secrets.DATAHUB_CI_CD }}" | \
            podman login -u "${{ gitea.actor }}" --password-stdin ${{ env.REGISTRY }}

      - name: Re-tag stable to target release
        run: |
          set -euo pipefail
          components_to_rollback=""
          if [[ "${{ inputs.component }}" == "all" ]]; then
            components_to_rollback="backend frontend timescaledb2 rabbitmq3"
          else
            components_to_rollback="${{ inputs.component }}"
          fi

          for img in $components_to_rollback; do
            echo "=== Rolling back $img to ${{ inputs.target_tag }} ==="
            podman pull ${{ env.REGISTRY }}/${{ env.REPO_PATH }}/$img:${{ inputs.target_tag }}
            podman tag  ${{ env.REGISTRY }}/${{ env.REPO_PATH }}/$img:${{ inputs.target_tag }} \
                        ${{ env.REGISTRY }}/${{ env.REPO_PATH }}/$img:stable
            podman push ${{ env.REGISTRY }}/${{ env.REPO_PATH }}/$img:stable
            echo "✓ $img:stable now points to ${{ inputs.target_tag }}"
          done

          echo
          echo "Rollback complete. wpic-virt podman-auto-update.timer will pull the new"
          echo ":stable digest within ~5 minutes and restart affected containers."