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 (all-zeros = first push)"
        required: true
        type: string
      FULL_PUBLISH:
        description: "Re-publish every file regardless of diff"
        required: false
        type: boolean
        default: false

jobs:
  publish:
    runs-on: ubuntu-latest
    container:
      image: python:3.12-slim

    steps:
      - name: Install system deps
        run: |
          apt-get update -qq
          apt-get install -y --no-install-recommends git pandoc ca-certificates

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

      - name: Install Python deps
        run: pip install --no-cache-dir -r auto-wiki/pipelines/songs/requirements.txt

      - name: Detect changed files
        id: diff
        run: |
          BASE="${{ inputs.SOURCE_BASE_REF }}"
          HEAD="${{ inputs.SOURCE_REF }}"
          # All-zeros base means first push — publish everything
          if [ -z "$BASE" ] || echo "$BASE" | grep -qE '^0+$'; then
            echo "mode=all" >> "$GITHUB_OUTPUT"
          else
            git -C ncmr-songs diff --name-only "$BASE" "$HEAD" -- '*.md' \
              | grep -v '^wip/' \
              | grep -v '^README\.md' \
              > /tmp/changed.txt 2>/dev/null || true
            echo "Changed files:"
            cat /tmp/changed.txt
            echo "mode=incremental" >> "$GITHUB_OUTPUT"
            echo "files=$(tr '\n' ' ' < /tmp/changed.txt)" >> "$GITHUB_OUTPUT"
          fi

      - 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: ${{ vars.URL_TO_GITEA }}/mikkeli/ncmr-songs
        run: |
          MODE="${{ steps.diff.outputs.mode }}"
          if [ "$MODE" = "all" ] || [ "${{ inputs.FULL_PUBLISH }}" = "true" ]; then
            python auto-wiki/pipelines/songs/publish.py \
              --source-dir ncmr-songs \
              --all
          else
            FILES="${{ steps.diff.outputs.files }}"
            if [ -z "$FILES" ]; then
              echo "No changed .md files detected. Nothing to publish."
              exit 0
            fi
            # shellcheck disable=SC2086
            python auto-wiki/pipelines/songs/publish.py \
              --source-dir ncmr-songs \
              --files $FILES
          fi