name: "Charts: Lint (Reusable)"

on:
  workflow_call:
    inputs:
      charts:
        description: >
          Json encoded list of Helm charts to release.
          Defaults to releasing everything.
        default: "[]"
        required: true
        type: string
      helmVersion:
        description: >
          Helm version to use.
        default: "latest"
        required: false
        type: string

permissions:
  contents: read

jobs:
  validate-required-changes:
    name: Validate required changes
    strategy:
      matrix:
        chart: ${{ fromJSON(inputs.charts) }}
      fail-fast: false
    if: |
      ${{
        (inputs.charts != '[]' && inputs.charts != '') &&
        github.event_name == 'pull_request'
      }}
    runs-on: ubuntu-24.04
    steps:
      - name: Checkout pull request branch
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
        with:
          path: pull
          persist-credentials: false

      - name: Checkout default branch
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
        with:
          ref: "${{ github.event.repository.default_branch }}"
          path: default
          persist-credentials: false

      - name: Get chart details for PR
        id: chart-details-pr
        uses: bjw-s-labs/helm-charts-actions/get-chart-details@612a2b0b047e25cb0a1c278c9a2721da30f367d2
        with:
          path: pull/charts/${{ matrix.chart }}
          validateChartYaml: true
          requireChangelog: true

      - name: Get chart details for default branch
        id: chart-details-default
        uses: bjw-s-labs/helm-charts-actions/get-chart-details@612a2b0b047e25cb0a1c278c9a2721da30f367d2
        with:
          path: default/charts/${{ matrix.chart }}
          allowChartToNotExist: true
          validateChartYaml: false
          requireChangelog: false

      # - name: Check version update
      #   if: ${{ steps.chart-details-pr.outputs.version == steps.chart-details-default.outputs.version }}
      #   uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
      #   with:
      #     script: |
      #       core.setFailed("Chart version has not been updated for ${{ matrix.chart }}");

      # - name: Check changelog update
      #   if: ${{ steps.chart-details-pr.outputs.changes == steps.chart-details-default.outputs.changes }}
      #   uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
      #   with:
      #     script: |
      #       core.setFailed("Changelog has not been updated for ${{ matrix.chart }}");

  validate_success:
    needs:
      - validate-required-changes
    if: ${{ !cancelled() }}
    name: Validation successful
    runs-on: ubuntu-latest
    steps:
      - name: Check matrix status
        if: >-
          ${{
              (inputs.chartsToLint != '' && inputs.chartsToLint != '[]') &&
              contains(needs.*.result, 'failure')
          }}
        run: exit 1

  lint-chart:
    if: ${{ inputs.charts != '[]' && inputs.charts != '' }}
    name: Lint chart
    strategy:
      matrix:
        chart: ${{ fromJSON(inputs.charts) }}
      fail-fast: false
    needs:
      - validate_success
    runs-on: ubuntu-24.04
    steps:
      - name: Checkout
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
        with:
          persist-credentials: false

      - name: Install Kubernetes tools
        uses: yokawasa/action-setup-kube-tools@9e25a4277af127b60011c95b6ed2da7e3b3613b1 # v0.11.2
        with:
          setup-tools: |
            helmv3
          helm: "${{ inputs.helmVersion }}"

      - name: Set up chart-testing
        uses: helm/chart-testing-action@0d28d3144d3a25ea2cc349d6e59901c4ff469b3b # v2.7.0

      - name: Dereference JSON schema
        uses: bjw-s-labs/helm-charts-actions/dereference-json-schema@612a2b0b047e25cb0a1c278c9a2721da30f367d2
        with:
          schemaFile: "charts/${{ matrix.chart }}/values.schema.json"
          outputFile: "charts/${{ matrix.chart }}/values.schema.json"
          allowFileNotFound: true

      - name: Always assume in-repo common library
        env:
          COMMON_LIBRARY_LOCATION: ${{ github.workspace }}/charts/library/common
        working-directory: charts/${{ matrix.chart }}
        run: |
          yq -i '. |= .dependencies |= map(select(.name == "common" and .repository == "https://bjw-s-labs.github.io/helm-charts").version = ">0.0.0-0")' Chart.yaml
          yq -i '. |= .dependencies |= map(select(.name == "common" and .repository == "https://bjw-s-labs.github.io/helm-charts").repository = "file://${COMMON_LIBRARY_LOCATION}")' Chart.yaml
          echo "::group::Modified Chart.yaml"
          cat Chart.yaml
          echo "::endgroup::"

      - name: Run chart-testing (lint)
        env:
          MATRIX_CHART: ${{ matrix.chart }}
        run: ct lint --config .ci/ct/ct.yaml --charts "charts/${MATRIX_CHART}"

  lint_success:
    needs:
      - lint-chart
    if: ${{ !cancelled() }}
    name: Lint successful
    runs-on: ubuntu-latest
    steps:
      - name: Check matrix status
        if: >-
          ${{
              (inputs.chartsToLint != '' && inputs.chartsToLint != '[]') &&
              contains(needs.*.result, 'failure')
          }}
        run: exit 1