name: Build docs

on:
  push:
    branches:
      - 'master'
      - 'mirror/master'
    paths:
      - 'docs/**'
      - '.github/workflows/docs.yml'
  pull_request:
    paths:
      - 'docs/**'
      - '.github/workflows/docs.yml'
  workflow_dispatch:
    inputs:
      deploy:
        description: 'Deploy to GitHub Pages'
        required: false
        default: false
        type: boolean

permissions:
  contents: write
  checks: write

jobs:
  build-docs:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Configure Git Credentials
        run: |
          git config user.name github-actions[bot]
          git config user.email 41898282+github-actions[bot]@users.noreply.github.com

      - uses: actions/setup-python@v5
        with:
          python-version: 3.x

      - run: echo "cache_id=$(date --utc '+%V')" >> $GITHUB_ENV

      - uses: actions/cache@v4
        with:
          key: mkdocs-material-${{ env.cache_id }}
          path: .cache
          restore-keys: |
            mkdocs-material-

      - run: pip install mkdocs-material

      - name: Build Docs and Capture Warnings
        id: build_docs
        run: |
          mkdocs build 2>&1 | tee mkdocs-output.log

      - name: Annotate Warnings and Errors
        if: always() && ${{ steps.build_docs.outcome != 'skipped' }}
        run: |
          warnings=$(grep -i 'WARNING' mkdocs-output.log || true)
          errors=$(grep -i 'ERROR' mkdocs-output.log || true)

          if [ -n "$warnings" ]; then
            # Annotate warnings
            echo "$warnings" | while read -r warning; do
              echo "::warning::${warning}"
            done
          fi

          if [ -n "$errors" ]; then
            # Annotate errors
            echo "$errors" | while read -r error; do
              echo "::error::${error}"
            done

            # Fail the build if any errors were found
            exit 1
          fi

      - name: Deploy to GitHub Pages
        if: ${{ github.event_name == 'push' || github.event_name == 'workflow_dispatch' && github.event.inputs.deploy == true }}
        run: mkdocs gh-deploy --force