name: i18n Sync
description: >
  Fetches the latest translations from i18n.schmalz.com, commits them to a
  chore/i18n branch, and opens a pull request against the destination branch.

inputs:
  i18n-application:
    description: Application key in i18n.schmalz.com (e.g. "calculator")
    required: true
  locales-folder:
    description: Path to the locales directory relative to the repository root
    required: false
    default: locales
  format-folder:
    description: >
      Directory containing the package.json whose format script should be run
      after downloading translations. Leave empty to skip formatting.
    required: false
    default: ""
  format-script:
    description: pnpm script name to run for formatting (e.g. "format", "format:fix")
    required: false
    default: format
  jfrog-token:
    description: JFrog npm auth token (required when format-folder is set)
    required: false
    default: ""
  forgejo-token:
    description: Forgejo token with contents:write and pull-requests:write access
    required: true
  destination-branch:
    description: Target branch for the pull request
    required: false
    default: dev

runs:
  using: composite
  steps:
    - name: Install jq if missing
      shell: bash
      run: |
        set -euo pipefail
        command -v jq >/dev/null 2>&1 || sudo apt-get install -y --no-install-recommends jq

    - name: Configure git
      shell: bash
      env:
        FORGEJO_TOKEN: ${{ inputs.forgejo-token }}
      run: |
        set -euo pipefail
        git config user.name "github-actions[bot]"
        git config user.email "41898282+github-actions[bot]@users.noreply.github.com"

        ORIGIN_URL=$(git remote get-url origin)
        CLEAN_URL=$(echo "$ORIGIN_URL" | sed 's|https://[^@]*@|https://|')
        git remote set-url origin "$(echo "$CLEAN_URL" | sed "s|https://|https://github-actions[bot]:${FORGEJO_TOKEN}@|")"

    - name: Check if i18n branch already exists
      shell: bash
      run: |
        set -euo pipefail
        if git ls-remote --exit-code --heads origin "refs/heads/chore/i18n" >/dev/null 2>&1; then
          echo "Branch chore/i18n already exists. A previous i18n update is still pending."
          exit 1
        fi

    - name: Download translations
      shell: bash
      env:
        I18N_APPLICATION: ${{ inputs.i18n-application }}
        LOCALES_FOLDER: ${{ inputs.locales-folder }}
      run: |
        set -euo pipefail
        git checkout -b chore/i18n

        echo "Fetching available languages for application: $I18N_APPLICATION"
        languages_json=$(curl --fail-with-body -sSL "https://i18n.schmalz.com/api/languages?projectKey=$I18N_APPLICATION")

        echo "$languages_json" | jq -r '.[]' | while read -r lang; do
          echo "Downloading language: $lang"
          curl --fail-with-body -sSL -o "${LOCALES_FOLDER}/${lang}.json" \
            "https://i18n.schmalz.com/api/${I18N_APPLICATION}/${lang}.json"
        done

    - name: Format translations
      if: ${{ inputs.format-folder != '' }}
      uses: https://schmalz-git.git.onstackit.cloud/schmalz/shared-actions/pnpm-build@pnpm-build-v1
      with:
        working-directory: ${{ inputs.format-folder }}
        jfrog-token: ${{ inputs.jfrog-token }}
        run-scripts: ${{ inputs.format-script }}
        check-dedupe: "false"

    - name: Commit and push translations
      id: commit
      shell: bash
      env:
        LOCALES_FOLDER: ${{ inputs.locales-folder }}
      run: |
        set -euo pipefail
        git add --all "${LOCALES_FOLDER}/"

        if git diff-index --cached --quiet HEAD; then
          echo "No translation changes detected. Nothing to do."
          echo "has_changes=false" >> "$GITHUB_OUTPUT"
          exit 0
        fi

        git commit -m "chore: update translations via i18n"
        git push origin chore/i18n
        echo "has_changes=true" >> "$GITHUB_OUTPUT"

    - name: Create pull request
      if: ${{ steps.commit.outputs.has_changes == 'true' }}
      shell: bash
      env:
        TOKEN: ${{ inputs.forgejo-token }}
        DESTINATION_BRANCH: ${{ inputs.destination-branch }}
      run: |
        set -euo pipefail
        curl --fail-with-body -s -X POST \
          -H "Authorization: token ${TOKEN}" \
          -H "Content-Type: application/json" \
          "${GITHUB_SERVER_URL}/api/v1/repos/${GITHUB_REPOSITORY}/pulls" \
          -d "$(jq -n \
            --arg title "chore: update translations via i18n" \
            --arg head "chore/i18n" \
            --arg base "$DESTINATION_BRANCH" \
            --arg body "Automated translation update from i18n.schmalz.com" \
            '{title: $title, head: $head, base: $base, body: $body, delete_branch_after_merge: true}'
          )"