name: Demo

on:
  push:
    branches: [main]
    paths-ignore:
      - "demo/**"
      - "**.md"
      - "LICENSE"
  workflow_dispatch:

permissions:
  contents: write

concurrency:
  group: demo
  cancel-in-progress: true

jobs:
  generate:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6

      - uses: actions/setup-go@v6
        with:
          go-version: "1.26"
          cache: true

      - name: Build ghstats
        run: go build -trimpath -ldflags="-s -w" -o ghstats .

      - name: Render every card for every theme
        env:
          GITHUB_TOKEN: ${{ secrets.GHSTATS_TOKEN }}
        run: |
          rm -rf demo
          mkdir -p demo
          ./ghstats \
            -user "${{ github.repository_owner }}" \
            -themes all \
            -tz Asia/Saigon \
            -out demo

      - name: Write demo README
        env:
          OWNER: ${{ github.repository_owner }}
          REPO: ${{ github.repository }}
        run: |
          cards=(
            profile-details
            repos-per-language
            most-commit-language
            stats
            productive-time
            productive-weekday
            contributions
            contributions-heatmap
            top-starred-repos
            streak
            most-commit-language-all-time
            productive-time-all-time
            productive-weekday-all-time
            contributions-all-time
            contributions-by-year
          )
          themes=$(./ghstats -list-themes)
          {
            echo "# ghstats demo gallery"
            echo
            echo "Every card in every theme, rendered for [\`$OWNER\`](https://github.com/$OWNER)."
            echo
            echo "Auto-generated by [\`.github/workflows/demo.yml\`](../.github/workflows/demo.yml) on each push to \`main\`. Do not edit by hand."
            echo
            echo "## Themes"
            echo
            for theme in $themes; do
              echo "- [\`$theme\`](#$theme)"
            done
            echo
            for theme in $themes; do
              dir="demo/$theme"
              [ -d "$dir" ] || continue
              echo "## $theme"
              echo
              for card in "${cards[@]}"; do
                svg="$dir/$card.svg"
                [ -f "$svg" ] || continue
                echo "![$card](./$theme/$card.svg)"
              done
              echo
              echo "[back to top](#themes)"
              echo
            done
          } > demo/README.md

      - name: Commit demo back to main
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git add demo
          if git diff --cached --quiet; then
            echo "No demo changes to commit."
            exit 0
          fi
          git commit -m "chore(demo): regenerate gallery"
          git push origin HEAD:${{ github.ref_name }}