name: Auto-translate README

on:
  push:
    branches: [master, main]
    paths:
      - 'README.md'
  pull_request:
    paths:
      - 'README.md'
  workflow_dispatch:

permissions:
  contents: write
  pull-requests: write

jobs:
  translate:
    name: Translate README to Multiple Languages
    runs-on: ubuntu-latest

    steps:
    - name: Checkout repository
      uses: actions/checkout@v4
      with:
        fetch-depth: 0

    - name: Translate README to Chinese
      uses: 3ru/gpt-translate@v1.1.11
      with:
        apikey: ${{ secrets.OPENAI_API_KEY }}
        inputFiles: 'README.md'
        outputFiles: 'README-zh.md'
        targetLanguage: 'Simplified Chinese'

    - name: Translate README to Japanese
      uses: 3ru/gpt-translate@v1.1.11
      with:
        apikey: ${{ secrets.OPENAI_API_KEY }}
        inputFiles: 'README.md'
        outputFiles: 'README-ja.md'
        targetLanguage: 'Japanese'

    - name: Check for changes
      id: check_changes
      run: |
        if git diff --quiet HEAD -- README-zh.md README-ja.md; then
          echo "No translation changes detected"
          echo "has_changes=false" >> $GITHUB_OUTPUT
        else
          echo "Translation changes detected"
          echo "has_changes=true" >> $GITHUB_OUTPUT
        fi

    - name: Commit translations
      if: steps.check_changes.outputs.has_changes == 'true'
      run: |
        git config --local user.email "github-actions[bot]@users.noreply.github.com"
        git config --local user.name "github-actions[bot]"
        git add README-zh.md README-ja.md
        git commit -m "chore: auto-translate README to ZH/JA

        🤖 Generated with [GPT-Translate](https://github.com/3ru/gpt-translate)

        Co-Authored-By: GitHub Actions <noreply@github.com>"

    - name: Push changes
      if: steps.check_changes.outputs.has_changes == 'true' && github.event_name == 'push'
      uses: ad-m/github-push-action@master
      with:
        github_token: ${{ secrets.GITHUB_TOKEN }}
        branch: ${{ github.ref }}

    - name: Create Pull Request
      if: steps.check_changes.outputs.has_changes == 'true' && github.event_name == 'pull_request'
      uses: peter-evans/create-pull-request@v6
      with:
        token: ${{ secrets.GITHUB_TOKEN }}
        commit-message: "chore: auto-translate README to ZH/JA"
        title: "🌐 Auto-translate README updates"
        body: |
          ## 🤖 Automated Translation Update

          This PR contains automated translations of README.md updates.

          **Changes:**
          - ✅ README-zh.md (Simplified Chinese)
          - ✅ README-ja.md (Japanese)

          **Translation powered by:**
          - [GPT-Translate](https://github.com/3ru/gpt-translate)
          - OpenAI GPT-4

          Please review the translations for accuracy before merging.
        branch: chore/auto-translate-readme
        delete-branch: true