name: Build PDF
on:
  push:
    branches: [ main ]
    paths:
      - 'paper/**'
      - '.github/**'
  pull_request:
    paths:
      - 'paper/**'
      - '.github/**'
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Compile LaTeX document
        uses: xu-cheng/latex-action@v3
        with:
          root_file: main.tex
          working_directory: paper/src
          args: -pdf -f -interaction=nonstopmode -file-line-error -outdir=../build
          pre_compile: bash ../concat_code.sh
      - name: Upload PDF
        uses: actions/upload-artifact@v4
        with:
          name: thesis-pdf
          path: paper/build/main.pdf

      - name: Get current date
        id: date
        run: echo "date=$(date +'%Y-%m-%d')" >> $GITHUB_OUTPUT

      - name: Upload to Cloudflare R2
        env:
          AWS_ACCESS_KEY_ID: ${{ secrets.R2_ACCESS_KEY_ID }}
          AWS_SECRET_ACCESS_KEY: ${{ secrets.R2_SECRET_ACCESS_KEY }}
          AWS_ENDPOINT_URL: ${{ secrets.R2_ENDPOINT }}
          DATE: ${{ steps.date.outputs.date }}
          BUCKET_NAME: ${{ secrets.R2_BUCKET_NAME }}
        run: |
          pip install boto3
          python3 << 'EOF'
          import boto3
          import os

          s3 = boto3.client('s3',
              endpoint_url=os.environ['AWS_ENDPOINT_URL'],
              aws_access_key_id=os.environ['AWS_ACCESS_KEY_ID'],
              aws_secret_access_key=os.environ['AWS_SECRET_ACCESS_KEY']
          )

          date = os.environ['DATE']
          bucket = os.environ['BUCKET_NAME']

          # upload dated version
          dated_filename = f"thesis-{date}.pdf"
          s3.upload_file(
              'paper/build/main.pdf',
              bucket,
              dated_filename,
              ExtraArgs={'ContentType': 'application/pdf'}
          )
          print(f"Uploaded {dated_filename}")

          # upload latest version
          s3.upload_file(
              'paper/build/main.pdf',
              bucket,
              'thesis-latest.pdf',
              ExtraArgs={'ContentType': 'application/pdf'}
          )
          print(f"Uploaded thesis-latest.pdf")
          EOF