name: Emojis Auto Update

on:
  schedule:
    - cron: "0 0 * * 1,4"
  workflow_dispatch:

concurrency:
  group: emojis-autoupdate

jobs:
  emojis-autoupdate:
    runs-on: ubuntu-latest

    steps:
    - name: Checkout repository
      uses: actions/checkout@v4
    - uses: fregante/setup-git-user@v1

    - name: Install the latest version of uv
      uses: astral-sh/setup-uv@v6

    - name: Sync UV
      run: uv sync

    - name: Create or Checkout Branch
      id: branch
      run: |
        # Create a new branch name with timestamp
        NEW_BRANCH_NAME="emojis-autoupdate-$(date +%s)"
        
        # Check for existing branches
        git fetch origin
        EXISTING_BRANCH=$(git branch -r | grep "origin/emojis-autoupdate-" || true)
        
        if [ -z "$EXISTING_BRANCH" ]; then
          # No existing branch, create a new one
          echo "Creating new branch: $NEW_BRANCH_NAME"
          git checkout -b $NEW_BRANCH_NAME
          BRANCH_NAME=$NEW_BRANCH_NAME
        else
          # Found existing branch, extract name without "origin/"
          BRANCH_NAME=$(echo $EXISTING_BRANCH | sed 's|origin/||' | tr -d '[:space:]')
          echo "Found existing branch: $BRANCH_NAME"
          
          # Create a local tracking branch
          git checkout -b $BRANCH_NAME --track origin/$BRANCH_NAME || git checkout -b $BRANCH_NAME
          
          # If that fails, fall back to new branch
          if [ $? -ne 0 ]; then
            echo "Failed to checkout existing branch, creating new: $NEW_BRANCH_NAME"
            git checkout -b $NEW_BRANCH_NAME
            BRANCH_NAME=$NEW_BRANCH_NAME
          fi
        fi
        
        echo "Using branch: $BRANCH_NAME"
        echo "branch_name=$BRANCH_NAME" >> $GITHUB_ENV

    - name: Run Update Script
      id: run_script
      run: |
        set +e
        uv run src
        CODE=$?
        set -e
        if [ $CODE -eq 0 ]; then
        echo "Changes detected"
          echo "changes_detected=true" >> $GITHUB_ENV
        elif [ $CODE -eq 3 ]; then
          echo "No changes detected"
          echo "changes_detected=false" >> $GITHUB_ENV
          # Transform it to 0 to avoid failing the workflow
          echo "exit_code=0" >> $GITHUB_ENV
          exit 0
        else
          echo "Script failed with exit code $EXIT_CODE"
          echo "exit_code=$EXIT_CODE" >> $GITHUB_ENV
          exit $CODE
        fi

    - name: Commit and Push Changes
      if: env.changes_detected == 'true'
      run: |
        git add build/*
        git commit -m "Emojis autoupdate"
        git push --force origin ${{ env.branch_name }}

    - name: Open Pull Request
      if: env.changes_detected == 'true'
      # use the gh cli to create a pull request, first check if a pr already exists for the branch
      run: |
            EXISTING_PR=$(gh pr list --search "is:open label:emojis" --json headRefName,number,author -q '.[0]')
            if [ -z "$EXISTING_PR" ]; then
              echo "No existing PR found, creating a new one."
              gh pr create --base master --head ${{ env.branch_name }} --title "Emojis Auto Update" --body "This PR was created automatically by the Emojis Auto Update workflow." --label emojis
            else
              echo "An existing PR was found: $EXISTING_PR"
            fi
      env:
        GH_TOKEN: ${{ github.token }}