on:
  workflow_call:
    inputs:
      SOURCE_REF:
        description: "Commit SHA that was pushed to ncmr-songs"
        required: true
        type: string
      SOURCE_BASE_REF:
        description: "Commit SHA before the push (empty or all-zeros = first push)"
        required: true
        type: string

jobs:
  publish:
    runs-on: ubuntu-latest
    container:
      image: pi5-16.local:3005/novoyuuparosk-wiki/novoyuuparosk-wiki-runner:4f134af

    steps:
      - name: Checkout ncmr-songs
        env:
          FAPAT: ${{ secrets.FAPAT }}
          URL_TO_GITEA: ${{ vars.URL_TO_GITEA }}
          SOURCE_REF: ${{ inputs.SOURCE_REF }}
        run: |
          git clone "http://mikkeli:${FAPAT}@${URL_TO_GITEA#http://}/novoyuuparosk-wiki/ncmr-songs" ncmr-songs
          git -C ncmr-songs checkout "$SOURCE_REF"

      - name: Checkout auto-wiki
        env:
          FAPAT: ${{ secrets.FAPAT }}
          URL_TO_GITEA: ${{ vars.URL_TO_GITEA }}
        run: git clone "http://mikkeli:${FAPAT}@${URL_TO_GITEA#http://}/novoyuuparosk-wiki/novoyuuparosk-auto-wiki" auto-wiki

      # The diff bounds what gets *written*, not what gets *read*. The publisher
      # always scans the whole repository to resolve links and page titles, then
      # writes only these files (plus, one hop out, any page they link to or that
      # links to them). Passing a subset here is safe for that reason and only
      # that reason — resolution no longer depends on the batch.
      - name: Detect changed files
        id: diff
        env:
          BASE: ${{ inputs.SOURCE_BASE_REF }}
          HEAD: ${{ inputs.SOURCE_REF }}
        run: |
          # Empty or all-zeros base means first push or manual dispatch — publish everything
          if [ -z "$BASE" ] || echo "$BASE" | grep -qE '^0+$'; then
            echo "First push or manual dispatch — publishing everything."
            echo "mode=all" >> "$GITHUB_OUTPUT"
            exit 0
          fi
          CHANGED=$(git -C ncmr-songs diff --name-only "$BASE" "$HEAD" -- '*.md' | grep -v '^wip/' || true)
          echo "Changed files:"
          echo "$CHANGED"
          echo "mode=incremental" >> "$GITHUB_OUTPUT"
          echo "files=$(echo "$CHANGED" | tr '\n' ' ')" >> "$GITHUB_OUTPUT"

      - name: Publish
        env:
          WIKI_API_URL: ${{ vars.WIKI_API_URL }}
          WIKI_BASE_URL: ${{ vars.WIKI_BASE_URL }}
          WIKI_BOT_USER: ${{ secrets.WIKI_BOT_USER }}
          WIKI_BOT_PASSWORD: ${{ secrets.WIKI_BOT_PASSWORD }}
          SOURCE_REF: ${{ inputs.SOURCE_REF }}
          GITEA_REPO_URL: ${{ vars.PUBLIC_URL_TO_GITEA }}/novoyuuparosk-wiki/ncmr-songs
          MODE: ${{ steps.diff.outputs.mode }}
          FILES: ${{ steps.diff.outputs.files }}
        run: |
          if [ "$MODE" = "all" ]; then
            python auto-wiki/pipelines/songs/publish.py --source-dir ncmr-songs --all
          elif [ -n "$(echo "$FILES" | tr -d '[:space:]')" ]; then
            # shellcheck disable=SC2086
            python auto-wiki/pipelines/songs/publish.py --source-dir ncmr-songs --files $FILES
          else
            echo "No changed .md files outside wip/. Nothing to publish."
          fi