name: Convert YAML to JSON

on:
  workflow_dispatch:
  schedule:
    - cron: "0 3 * * sat" # every saturday at 3AM

jobs:
  nix:
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write
    steps:
      - name: "Checkout"
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: "Install nix"
        uses: cachix/install-nix-action@master
        with:
          install_url: https://nixos.org/nix/install
          extra_nix_config: |
            experimental-features = nix-command flakes
            allow-import-from-derivation = false

      - name: "Nix Magic Cache"
        uses: DeterminateSystems/magic-nix-cache-action@main

      - name: Run conversion script
        run: |
          tmpdir=$(mktemp -d)

          if [ -d "$tmpdir" ]; then
              echo "Cloning original schemes directory"
              git clone https://github.com/tinted-theming/schemes.git "$tmpdir"/yaml
          else
              echo "Failed to create temp directory" >&2
              exit 1
          fi

          yaml_dir_base16="$tmpdir"/yaml/base16
          yaml_dir_base24="$tmpdir"/yaml/base24
          json_dir_base16="$tmpdir"/json/base16
          json_dir_base24="$tmpdir"/json/base24

          # ensure JSON directories exist
          mkdir -p "$json_dir_base16"
          mkdir -p "$json_dir_base24"

          # convert YAML to JSON
          convert_yaml_to_json() {
              echo "Converting"
              local yaml_file="$1"
              local json_file="$2"
              nix run --builders "" --substituters "https://cache.nixos.org" .#convert-scheme -- "$yaml_file" "$json_file"
          }

          # convert YAML files in base16 directory
          for yaml_file in "$yaml_dir_base16"/*.yaml; do
              base_name=$(basename "$yaml_file" .yaml)
              convert_yaml_to_json "$yaml_file" "$json_dir_base16/$base_name.json"
          done

          # convert YAML files in base24 directory
          for yaml_file in "$yaml_dir_base24"/*.yaml; do
              base_name=$(basename "$yaml_file" .yaml)
              convert_yaml_to_json "$yaml_file" "$json_dir_base24/$base_name.json"
          done

          # move converted JSON files to current directory
          mkdir -p json/{base16,base24}
          mv "$json_dir_base16"/*.json json/base16
          mv "$json_dir_base24"/*.json json/base24

          # Cleanup
          rm -rf "$tmpdir"

      - name: Commit files
        run: |
          git config --local user.email "github-actions[bot]@users.noreply.github.com"
          git config --local user.name "github-actions[bot]"
          git add *.json
          git commit -m "CI: update JSON schemes" || echo "No changes to commit"

      - name: Push changes
        if: success()
        uses: ad-m/github-push-action@master
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}