name: sync

on:
  schedule:
    - cron: '0 8 * * *'
  workflow_dispatch:

permissions:
  contents: write
  pull-requests: write

jobs:
  sync-mapping:
    name: Sync Upstream Mapping
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Generate mapping from upstream
        run: |
          curl -sL https://raw.githubusercontent.com/ya2s/nonicons/main/src/template/nonicon.json \
            | jq -r 'to_entries | sort_by(.key) | .[] | "\(.key | sub("-16$"; "")) \(.value)"' \
            > /tmp/upstream.txt

          {
            echo '---@type table<string, integer>'
            echo 'local M = {'
            while IFS=' ' read -r name code; do
              printf "  ['%s'] = %s,\n" "$name" "$code"
            done < /tmp/upstream.txt
            echo '}'
            echo 'return M'
          } > lua/nonicons/mapping.lua

      - name: Check for changes
        id: diff
        run: |
          if git diff --quiet lua/nonicons/mapping.lua; then
            echo "changed=false" >> "$GITHUB_OUTPUT"
          else
            echo "changed=true" >> "$GITHUB_OUTPUT"
          fi

      - name: Create pull request
        if: steps.diff.outputs.changed == 'true'
        uses: peter-evans/create-pull-request@v7
        with:
          branch: sync/upstream-mapping
          title: 'fix(mapping): sync with upstream nonicons font'
          body: |
            ## Problem

            `mapping.lua` is out of sync with the [ya2s/nonicons](https://github.com/ya2s/nonicons) upstream font.

            ## Solution

            Auto-generated `mapping.lua` from upstream `nonicon.json`.
          commit-message: 'fix(mapping): sync with upstream nonicons font'
          labels: upstream-sync
          delete-branch: true