name: Check Missing i18n Keys

on:
  push:
    paths:
      - "src/locales/en.json"
      - "src/locales/*.json"
      - ".github/workflows/i18n-check.yml"
  workflow_dispatch:

jobs:
  check-i18n:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Set up Node.js
        uses: actions/setup-node@v4
        with:
          node-version: 20

      - name: Install jq
        run: sudo apt-get install -y jq

      - name: Check missing i18n keys
        id: check-missing
        run: |
          mkdir -p i18n-missing
          EN_KEYS=$(jq -r 'keys[]' src/locales/en.json | sort)
          for file in src/locales/*.json; do
            [ "$file" = "src/locales/en.json" ] && continue
            LANG=$(basename "$file" .json)
            jq -r 'keys[]' "$file" | sort > tmp_keys.txt
            comm -23 <(echo "$EN_KEYS") tmp_keys.txt > i18n-missing/$LANG.txt || true
            if [ -s i18n-missing/$LANG.txt ]; then
              echo "Missing keys in $LANG:"
              cat i18n-missing/$LANG.txt
            fi
          done

      - name: Create PR if missing keys found
        uses: peter-evans/create-pull-request@v6
        if: |
          always() && (hashFiles('i18n-missing/*.txt') != '')
        with:
          commit-message: "chore(i18n): report missing translation keys"
          title: "chore(i18n): report missing translation keys"
          body: |
            The following language files are missing keys compared to en.json:

            ${{ steps.check-missing.outputs.summary }}

            Each file in `i18n-missing/` lists the missing keys for that language.
          branch: i18n/missing-keys-report
          add-paths: |
            i18n-missing/*.txt