name: renovate

on:
  workflow_dispatch:
  schedule:
    - cron: "@hourly"
  push:

jobs:
  discover-repos:
    name: Discover Repositories
    runs-on: ubuntu-latest
    container: ghcr.io/renovatebot/renovate:39.219.2
    outputs:
      repo-batches: ${{ steps.create-batches.outputs.batches }}
    
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      
      - name: Cache Renovate dependencies
        uses: actions/cache@v4
        with:
          path: /tmp/renovate-cache
          key: ${{ runner.os }}-renovate-discovery-${{ hashFiles('config.js') }}-${{ github.run_id }}
          restore-keys: |
            ${{ runner.os }}-renovate-discovery-${{ hashFiles('config.js') }}-
            ${{ runner.os }}-renovate-discovery-
      
      - name: Install jq
        run: |
          apt-get update && apt-get install -y jq
      
      - name: Discover Repositories
        run: |
          renovate --write-discovered-repos=/tmp/renovate-repos.json
        env:
          RENOVATE_CONFIG_FILE: "config.js"
          RENOVATE_TOKEN: ${{ secrets.RENOVATE_TOKEN }}
          GITHUB_COM_TOKEN: ${{ secrets.GH_TOKEN }}
          LOG_LEVEL: "info"
          RENOVATE_CACHE_DIR: /tmp/renovate-cache
          RENOVATE_AUTODISCOVER: "true"
      
      - name: Create Repository Batches
        id: create-batches
        run: |
          # Check if repos file exists and is not empty
          if [ ! -f /tmp/renovate-repos.json ] || [ ! -s /tmp/renovate-repos.json ]; then
            echo "No repositories discovered or file not created/empty"
            echo "batches=[]" >> $GITHUB_OUTPUT
            exit 0
          fi
          
          # Verify the file contains valid JSON
          if ! jq empty /tmp/renovate-repos.json 2>/dev/null; then
            echo "Invalid JSON in repositories file"
            echo "batches=[]" >> $GITHUB_OUTPUT
            exit 0
          fi
          
          # Read the JSON array and create batches
          echo "Creating batches of repositories..."
          batches=$(jq -c 'if type == "array" then . else [] end | _nwise(5) | [.[]]' /tmp/renovate-repos.json)
          
          # Handle empty results
          if [ "$batches" = "" ] || [ "$batches" = "null" ]; then
            echo "No valid repositories found"
            echo "batches=[]" >> $GITHUB_OUTPUT
            exit 0
          fi
          
          # Format as proper JSON array for GitHub Actions output
          batches="[$(echo "$batches" | tr '\n' ',' | sed 's/,$//' )]"
          echo "batches=$batches" >> $GITHUB_OUTPUT
          
          echo "Created $(echo "$batches" | jq '. | length') batches of repositories"

  renovate:
    name: Run Renovate
    needs: discover-repos
    runs-on: ubuntu-latest
    container: ghcr.io/renovatebot/renovate:39.219.2
    if: ${{ needs.discover-repos.outputs.repo-batches != '[]' }}
    strategy:
      matrix:
        batch: ${{ fromJson(needs.discover-repos.outputs.repo-batches) }}
      fail-fast: false
      max-parallel: 5
    
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      
      - name: Cache Renovate dependencies
        uses: actions/cache@v4
        with:
          path: /tmp/renovate-cache
          key: ${{ runner.os }}-renovate-batch-${{ github.run_id }}
          restore-keys: |
            ${{ runner.os }}-renovate-
      
      - name: Install jq
        run: |
          apt-get update && apt-get install -y jq
      
      - name: Run Renovate on Batch
        run: |
          # Simple processing of batch array without complex jq
          REPOS=""
          for repo in $(echo '${{ toJson(matrix.batch) }}' | jq -r '.[]'); do
            if [ -n "$REPOS" ]; then
              REPOS="$REPOS,$repo"
            else
              REPOS="$repo"
            fi
          done
          
          echo "Processing repositories: $REPOS"
          
          # Run Renovate on the specific repositories
          if [ -n "$REPOS" ]; then
            renovate $REPOS
          else
            echo "No repositories to process in this batch"
          fi
        env:
          RENOVATE_CONFIG_FILE: "config.js"
          RENOVATE_TOKEN: ${{ secrets.RENOVATE_TOKEN }}
          GITHUB_COM_TOKEN: ${{ secrets.GH_TOKEN }}
          LOG_LEVEL: "info"
          RENOVATE_CACHE_DIR: /tmp/renovate-cache

  # Fallback job in case no repositories are found or for handling config repositories
  renovate-default:
    name: Run Renovate (Default)
    needs: discover-repos
    runs-on: ubuntu-latest
    container: ghcr.io/renovatebot/renovate:39.219.2
    if: ${{ needs.discover-repos.outputs.repo-batches == '[]' }}
    
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      
      - name: Cache Renovate dependencies
        uses: actions/cache@v4
        with:
          path: /tmp/renovate-cache
          key: ${{ runner.os }}-renovate-default-${{ hashFiles('config.js') }}-${{ github.run_id }}
          restore-keys: |
            ${{ runner.os }}-renovate-default-${{ hashFiles('config.js') }}-
            ${{ runner.os }}-renovate-default-
      
      - name: Run Renovate
        run: renovate
        env:
          RENOVATE_CONFIG_FILE: "config.js"
          RENOVATE_TOKEN: ${{ secrets.RENOVATE_TOKEN }}
          GITHUB_COM_TOKEN: ${{ secrets.GH_TOKEN }}
          LOG_LEVEL: "info"
          RENOVATE_CACHE_DIR: /tmp/renovate-cache