name: Deploy Kubeflow Pipelines

on:
  push:
    branches: [master, main]
    paths:
      - 'pipelines/**/*.py'
  workflow_dispatch:
    inputs:
      pipeline_path:
        description: 'Path to specific pipeline (e.g., pipelines/examples/hello_world.py)'
        required: false
        default: ''

env:
  KUBEFLOW_ENDPOINT: https://kubeflow.walleye-frog.ts.net/pipeline

jobs:
  compile-and-deploy:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 2

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.11'

      - name: Install kfp
        run: pip install kfp

      - name: Get changed pipeline files
        id: changed
        run: |
          if [ -n "${{ github.event.inputs.pipeline_path }}" ]; then
            echo "files=${{ github.event.inputs.pipeline_path }}" >> $GITHUB_OUTPUT
          else
            CHANGED=$(git diff --name-only HEAD~1 HEAD -- 'pipelines/**/*.py' | tr '\n' ' ')
            echo "files=$CHANGED" >> $GITHUB_OUTPUT
          fi

      - name: Compile and upload pipelines
        if: steps.changed.outputs.files != ''
        env:
          KFP_ENDPOINT: ${{ env.KUBEFLOW_ENDPOINT }}
        run: |
          for file in ${{ steps.changed.outputs.files }}; do
            if [ -f "$file" ]; then
              echo "Processing $file..."
              
              # Extract pipeline name from filename
              PIPELINE_NAME=$(basename "$file" .py | tr '_' '-')
              YAML_FILE="${PIPELINE_NAME}.yaml"
              
              # Compile pipeline
              echo "Compiling $file to $YAML_FILE..."
              kfp dsl compile --py "$file" --output "$YAML_FILE"
              
              # Upload to Kubeflow (requires auth configured)
              # Note: This requires Kubeflow to be accessible from GHA runners
              # For private clusters, use self-hosted runners or Tailscale
              echo "Compiled: $YAML_FILE"
              echo "Upload manually or configure runner access to Kubeflow"
            fi
          done

      - name: Upload compiled pipelines as artifacts
        uses: actions/upload-artifact@v4
        with:
          name: compiled-pipelines
          path: '*.yaml'
          retention-days: 7

      - name: Summary
        run: |
          echo "## Compiled Pipelines" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          for f in *.yaml; do
            [ -f "$f" ] && echo "- $f" >> $GITHUB_STEP_SUMMARY
          done
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "Download artifacts and upload to Kubeflow, or configure self-hosted runner with Tailscale access." >> $GITHUB_STEP_SUMMARY