name: Optimize PNG Templates

on:
  push:
    branches:
      - "dev"
    paths:
      - "resource/**/*.png"
      - "docs/.vuepress/public/image/**"
      - "website/apps/web/public/**"
      - "website/apps/web/src/assets/links/**"
  workflow_dispatch:
    inputs:
      commit_message:
        description: "Commit Message"
        type: string
        required: false

jobs:
  optimize-png:
    # Skip workflow to prevent double consecutive runs
    # Skip workflow on PR merges
    if: ${{ github.event.head_commit.author.email != '41898282+github-actions[bot]@users.noreply.github.com' }}
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          show-progress: false
          persist-credentials: false

      - name: Check for direct push
        id: check_push
        run: |
          pr_merge_status=$(curl -s -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
          "https://api.github.com/repos/${{ github.repository }}/commits/${{ github.event.after }}/pulls" | xargs)

          if [[ "$pr_merge_status" == "[ ]" ]]; then
            echo "Direct push detected. Proceeding..."
            echo "is_pr=False" >> $GITHUB_OUTPUT
          else
            echo "PR merge detected. Exiting."
            echo "is_pr=True" >> $GITHUB_OUTPUT
          fi

      - name: Setup python
        if: steps.check_push.outputs.is_pr != 'True'
        uses: actions/setup-python@v5
        with:
          python-version: "3.11"

      - name: Cache Python packages
        id: cache_python
        if: steps.check_push.outputs.is_pr != 'True' && always()
        uses: actions/cache@v4
        with:
          path: ${{ env.pythonLocation }}/lib/python3.11/site-packages
          key: ${{ runner.os }}-pip-optimize-templates-${{ hashFiles('./tools/OptimizeTemplates/requirements.txt') }}

      - name: Install dependencies
        if: steps.check_push.outputs.is_pr != 'True' && steps.cache_python.outputs.cache-hit != 'true'
        run: |
          pip install -r tools/OptimizeTemplates/requirements.txt

      - name: Setup oxipng
        if: steps.check_push.outputs.is_pr != 'True'
        uses: baptiste0928/cargo-install@v3
        with:
          crate: oxipng

      - name: Run optimize_templates
        if: steps.check_push.outputs.is_pr != 'True'
        run: |
          python3 tools/OptimizeTemplates/optimize_templates.py

      - name: Commit changes
        id: commit_changes
        if: steps.check_push.outputs.is_pr != 'True'
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"

          git add .

          if git diff-index --quiet HEAD --; then
            echo "No changes to commit"
          else
            commit_msg="${{ github.event.inputs.commit_message }}"
            if [ -z "$commit_msg" ]; then
              commit_msg="chore: Auto Templates Optimization"
            fi
            git commit -m "$commit_msg" -m "Triggered by ${{github.sha}}" -m "[skip changelog]"
            git pull origin $(git rev-parse --abbrev-ref HEAD) --unshallow --rebase
            echo "have_commits=True" >> $GITHUB_OUTPUT
          fi

      - name: Push changes
        if: steps.check_push.outputs.is_pr != 'True' && steps.commit_changes.outputs.have_commits == 'True'
        uses: ad-m/github-push-action@master
        with:
          github_token: ${{ secrets.MAA_RESOURCE_SYNC }}
          branch: ${{ github.ref }}