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: 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: |
          # Install jq (not included in Renovate image)
          apt-get update && apt-get install -y jq
          
          # Check if repos file exists
          if [ ! -f /tmp/renovate-repos.json ]; then
            echo "No repositories discovered or file not created"
            echo "batches=[]" >> $GITHUB_OUTPUT
            exit 0
          fi
          
          # Read the JSON array from the input file
          json_array=$(cat /tmp/renovate-repos.json)
          
          # Group repositories into batches of 5
          echo "Creating batches of repositories..."
          batches=$(echo "$json_array" | jq -r '.[]' | xargs -n5 | jq -R -s 'split("\n") | map(select(length > 0) | split(" "))' | jq 'del(.[] | select(. == []))' | jq -c .)
          
          # Set the output for the next job
          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: ${{ runner.os }}-renovate-batch-${{ join(matrix.batch, '-') }}-${{ hashFiles('config.js') }}-${{ github.run_id }}
          restore-keys: |
            ${{ runner.os }}-renovate-batch-${{ join(matrix.batch, '-') }}-${{ hashFiles('config.js') }}-
            ${{ runner.os }}-renovate-batch-${{ join(matrix.batch, '-') }}-
            ${{ runner.os }}-renovate-
      
      - name: Run Renovate on Batch
        run: |
          # Convert array to comma-separated list
          REPOS=$(echo '${{ toJson(matrix.batch) }}' | jq -r 'join(",")')
          echo "Processing repositories: $REPOS"
          
          # Run Renovate on the specific repositories
          renovate $REPOS
        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