name: Draft image release

permissions:
  contents: write

on:
  workflow_dispatch:
    inputs:
      official_images_pr:
        description: Optional official-images PR number to use instead of auto-detect
        required: false
        type: string
      release_tag:
        description: Optional explicit release tag, for example v2026.06.1
        required: false
        type: string
  #schedule:
  #  - cron: "23 * * * *"

concurrency:
  group: draft-image-release
  cancel-in-progress: false

defaults:
  run:
    shell: bash -Eeuo pipefail {0}

jobs:
  draft-release:
    runs-on: ubuntu-latest

    steps:
      - name: Check out repository
        uses: actions/checkout@v6
        with:
          fetch-depth: 0
          ref: master

      - name: Ensure origin/master is available
        run: git fetch origin master

      - name: Generate release draft payload
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          REPO: ${{ github.repository }}
          INPUT_OFFICIAL_IMAGES_PR: ${{ inputs.official_images_pr }}
          INPUT_RELEASE_TAG: ${{ inputs.release_tag }}
        run: .github/scripts/generate-release-draft.sh

      - name: Create or update draft release
        if: env.SKIP_RELEASE != 'true'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          REPO: ${{ github.repository }}
        run: |
          if gh release view "$RELEASE_TAG" --repo "$REPO" >/dev/null 2>&1; then
            echo "Updating existing draft release $RELEASE_TAG"
            gh release edit "$RELEASE_TAG" \
              --repo "$REPO" \
              --draft=true \
              --title "$RELEASE_TAG" \
              --notes-file "$RUNNER_TEMP/release-notes.md"
          else
            echo "Creating draft release $RELEASE_TAG targeting $TARGET_SHA"
            gh release create "$RELEASE_TAG" \
              --repo "$REPO" \
              --draft \
              --title "$RELEASE_TAG" \
              --target "$TARGET_SHA" \
              --notes-file "$RUNNER_TEMP/release-notes.md"
          fi

      - name: Workflow summary
        if: env.SKIP_RELEASE != 'true'
        run: |
          {
            echo "## Draft release prepared"
            echo
            echo "- Release tag: \`$RELEASE_TAG\`"
            echo "- Target SHA: \`$TARGET_SHA\`"
            echo "- Previous tag: \`$PREVIOUS_TAG\`"
            echo "- Official Images PR: #$OFFICIAL_IMAGES_PR"
            echo "- Official Images URL: $OFFICIAL_IMAGES_PR_URL"
          } >> "$GITHUB_STEP_SUMMARY"

      - name: Skip summary
        if: env.SKIP_RELEASE == 'true'
        run: |
          {
            echo "## No release drafted"
            echo
            echo "$SKIP_REASON"
          } >> "$GITHUB_STEP_SUMMARY"