name: Update Docker Image Tags

on:
  schedule:
    - cron: '0 2 * * 1'  # 毎週月曜日午前2時
  workflow_dispatch:

jobs:
  update-tags:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Check for new nginx version
        id: nginx
        run: |
          CURRENT=$(grep -A2 "nginx:" values.yaml | grep "tag:" | sed 's/.*tag: "\(.*\)"/\1/')
          LATEST=$(curl -s https://registry.hub.docker.com/v2/repositories/library/nginx/tags?page_size=100 | \
            jq -r '.results[].name' | grep -E '^[0-9]+\.[0-9]+\.[0-9]+-alpine-perl$' | sort -V | tail -1)
          echo "current=$CURRENT" >> $GITHUB_OUTPUT
          echo "latest=$LATEST" >> $GITHUB_OUTPUT

      - name: Check for new wordpress version
        id: wordpress
        run: |
          CURRENT=$(grep -A2 "wordpress:" values.yaml | grep "tag:" | sed 's/.*tag: "\(.*\)"/\1/')
          LATEST=$(curl -s https://registry.hub.docker.com/v2/repositories/library/wordpress/tags?page_size=100 | \
            jq -r '.results[].name' | grep -E '^[0-9]+\.[0-9]+\.[0-9]+-php[0-9]+\.[0-9]+-fpm-alpine$' | sort -V | tail -1)
          echo "current=$CURRENT" >> $GITHUB_OUTPUT
          echo "latest=$LATEST" >> $GITHUB_OUTPUT

      - name: Update values.yaml
        if: steps.nginx.outputs.current != steps.nginx.outputs.latest || steps.wordpress.outputs.current != steps.wordpress.outputs.latest
        run: |
          sed -i 's/tag: "${{ steps.nginx.outputs.current }}"/tag: "${{ steps.nginx.outputs.latest }}"/' values.yaml
          sed -i 's/tag: "${{ steps.wordpress.outputs.current }}"/tag: "${{ steps.wordpress.outputs.latest }}"/' values.yaml

      - name: Create Pull Request
        uses: peter-evans/create-pull-request@v5
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          commit-message: |
            chore: update docker image tags
            
            - nginx: ${{ steps.nginx.outputs.current }} → ${{ steps.nginx.outputs.latest }}
            - wordpress: ${{ steps.wordpress.outputs.current }} → ${{ steps.wordpress.outputs.latest }}
          title: 'chore: update docker image tags'
          body: |
            ## Docker Image Updates
            
            | Image | Current | Latest |
            |-------|---------|--------|
            | nginx | `${{ steps.nginx.outputs.current }}` | `${{ steps.nginx.outputs.latest }}` |
            | wordpress | `${{ steps.wordpress.outputs.current }}` | `${{ steps.wordpress.outputs.latest }}` |
            
            This PR was automatically generated.
          branch: update-docker-images
          delete-branch: true