name: Build and Release PDF

on:
  push:
    tags:
      - 'v*'
      - 'release*'
  workflow_dispatch:

permissions:
  contents: write

jobs:
  build-pdf:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.11'

      - name: Install dependencies
        run: |
          # Install pandoc
          wget -q https://github.com/jgm/pandoc/releases/download/3.1.11/pandoc-3.1.11-1-amd64.deb
          sudo dpkg -i pandoc-3.1.11-1-amd64.deb
          rm pandoc-3.1.11-1-amd64.deb
          
          # Install TeX Live with XeLaTeX and Chinese support
          sudo apt-get update
          sudo apt-get install -y \
            texlive-xetex \
            texlive-lang-chinese \
            texlive-fonts-recommended \
            texlive-fonts-extra \
            fonts-noto-cjk \
            fonts-noto-cjk-extra
          
          # Verify installations
          pandoc --version
          xelatex --version

      - name: Build PDF
        run: |
          chmod +x bin/pdf bin/preprocess-epub.py
          mkdir -p output output/temp
          
          # Preprocess Markdown files
          python3 bin/preprocess-epub.py content/zh output/temp
          
          # Generate PDF with CI-specific fonts (Noto CJK)
          pandoc -o output/ddia.pdf \
            --metadata-file=metadata.yaml \
            -H bin/header-ci.tex \
            --toc \
            --toc-depth=2 \
            --top-level-division=chapter \
            --file-scope=true \
            --pdf-engine=xelatex \
            -V geometry:margin=1in \
            -V linestretch=1.5 \
            output/temp/_index.md \
            output/temp/preface.md \
            output/temp/part-i.md \
            output/temp/ch1.md \
            output/temp/ch2.md \
            output/temp/ch3.md \
            output/temp/ch4.md \
            output/temp/part-ii.md \
            output/temp/ch5.md \
            output/temp/ch6.md \
            output/temp/ch7.md \
            output/temp/ch8.md \
            output/temp/ch9.md \
            output/temp/part-iii.md \
            output/temp/ch10.md \
            output/temp/ch11.md \
            output/temp/ch12.md \
            output/temp/ch13.md \
            output/temp/ch14.md \
            output/temp/colophon.md \
            output/temp/glossary.md
          
          rm -rf output/temp
          
          if [ ! -f "output/ddia.pdf" ]; then
            echo "Error: PDF file was not created"
            exit 1
          fi
          
          ls -lh output/ddia.pdf
          file output/ddia.pdf

      - name: Upload PDF artifact
        uses: actions/upload-artifact@v4
        with:
          name: ddia-pdf
          path: output/ddia.pdf
          retention-days: 30

      - name: Create/Update Release
        if: startsWith(github.ref, 'refs/tags/')
        uses: softprops/action-gh-release@v1
        with:
          files: output/ddia.pdf
          name: ${{ github.ref_name }}
          body: |
            ## 《设计数据密集型应用》PDF 版本
            
            此版本为自动生成的 PDF 电子书。
            
            ### 文件信息
            - 文件名: `ddia.pdf`
            - 生成时间: ${{ github.event.head_commit.timestamp }}
            - 标签: ${{ github.ref_name }}
            
            ### 依赖工具
            - Pandoc 3.1.11
            - XeLaTeX (TeX Live)
            - 中文字体: Noto CJK
            
            ### 本地生成
            如需本地生成 PDF，请确保安装以下依赖：
            ```bash
            # macOS
            brew install pandoc
            brew install --cask mactex
            
            # Ubuntu/Debian
            sudo apt install pandoc texlive-xetex texlive-lang-chinese
            
            # 生成 PDF
            make pdf
            ```
          draft: false
          prerelease: false
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}