name: Release Charts

on:
  pull_request:
    paths:
    - 'charts/**'

  push:
    branches:
    - 'main'
    paths:
    - 'charts/**'

jobs:
  charts-changed:
    name: Get Charts Being Changed
    runs-on: ci-os

    steps:
    - name: Checkout Repository
      uses: actions/checkout@v4
      with:
        fetch-depth: 0

    - name: Identify Merge Commit and List Changed Charts
      id: changed-charts
      run: |
        # Get the current commit SHA
        CURRENT_SHA=$(git rev-parse HEAD)

        # Get parent commits
        PARENT_COUNT=$(git rev-list --parents -n 1 $CURRENT_SHA | wc -w)

        if [ "$PARENT_COUNT" -gt 2 ]; then
          echo "This is a merge commit with $((PARENT_COUNT - 1)) parents."
          PARENT_SHA=$(git rev-parse HEAD^1)
        elif [ "$PARENT_COUNT" -eq 2 ]; then
          PARENT_SHA=$(git rev-parse HEAD^1)
        else
          echo "Single commit with no parents. Listing all changes."
          PARENT_SHA=HEAD~1
        fi

        echo "Current Commit SHA: $CURRENT_SHA"
        echo "Parent Commit SHA: $PARENT_SHA"

        # List changed files and trim any extra line breaks
        CHANGED_FILES=$(git diff --name-only $PARENT_SHA $CURRENT_SHA | tr -d '\r')

        echo "Changed files:"
        echo "$CHANGED_FILES"

        # Extract chart directories
        CHANGED_CHARTS=$(echo "$CHANGED_FILES" | grep '^charts/' | awk -F/ '{print $2}' | sort -u | tr -d '\r')

        echo "Changed charts:"
        echo "$CHANGED_CHARTS"

        # Convert to JSON array
        if [ -z "$CHANGED_CHARTS" ]; then
          CHANGED_CHARTS_JSON="[]"
        else
          CHANGED_CHARTS_JSON=$(echo "$CHANGED_CHARTS" | jq -R -s -c 'split("\n") | map(select(length > 0))')
        fi

        echo "reposChanged=$CHANGED_CHARTS_JSON" >> $GITHUB_OUTPUT

        if [ -n "$CHANGED_CHARTS" ]; then
          echo "changesExist=true" >> $GITHUB_ENV
        else
          echo "changesExist=false" >> $GITHUB_ENV
        fi

    outputs:
      changesExist: ${{ env.changesExist }}
      reposChanged: ${{ env.reposChanged }}

  helm-publish:
    name: "Publish Helm Chart"
    needs: charts-changed
    if: github.event_name == 'push' && github.ref == 'refs/heads/main' && needs.charts-changed.outputs.changesExist == 'true'
    runs-on: ci-os

    steps:
    - name: Checkout Repository
      uses: actions/checkout@v4
      with:
        fetch-depth: 0

    - name: Publish Helm Charts
      env:
        FORGEJO_TOKEN: ${{ secrets.REPO_TOKEN }}
        OCI_URL: oci://code.252.no/tommy/charts
      run: |
        charts="${{ needs.charts-changed.outputs.reposChanged }}"

        # Iterate over each changed chart
        for chart in $(echo "$charts" | jq -r '.[]'); do
          echo "Processing chart: $chart"
          
          # Ensure the chart directory exists
          if [ ! -d "$chart" ]; then
            echo "Directory $chart does not exist. Skipping."
            continue
          fi

          rm -rf dist || true
          mkdir dist || true

          CHART_NAME=$(yq -r .name "$chart/Chart.yaml")
          CHART_VERSION=$(yq -r .version "$chart/Chart.yaml")
          TAG="$CHART_NAME-$CHART_VERSION"
          REPO="${{ github.repository }}"
          RELEASE_DIR="dist"
          RELEASE_NOTES="/var/ci-os/templates/release-notes-template.md"
          SHA="${{ github.sha }}"

          echo "=================="
          echo "Chart: $chart"
          echo "Chart Name: $CHART_NAME"
          echo "Chart Version: $CHART_VERSION"
          echo "Tag: $TAG"
          echo "Uploading to: $OCI_URL"

          # Package the Helm chart
          helm package "$chart" -d dist

          # Login to Helm registry
          echo "${FORGEJO_TOKEN}" | helm registry login code.252.no -u tommy --password-stdin

          # Push the Helm chart to OCI registry
          helm push "dist/$TAG.tgz" "$OCI_URL"

          echo "------------------"

          # Create a release (Assuming forgejo-release is properly configured)
          echo "Creating release"
          echo "Repository: $REPO"
          echo "Tag: $TAG"
          echo "Release notes: $RELEASE_NOTES"
          echo "Release dir: $RELEASE_DIR"
          echo "SHA: $SHA"
          forgejo-release create

          echo "=================="
        done