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: |
          # 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
          
          # Use node to process JSON instead of jq (Node.js is already installed in the container)
          node -e '
            const fs = require("fs");
            try {
              const data = fs.readFileSync("/tmp/renovate-repos.json", "utf8");
              let repos = [];
              try {
                repos = JSON.parse(data);
                if (!Array.isArray(repos)) {
                  repos = [];
                }
              } catch (e) {
                console.error("Invalid JSON:", e.message);
              }
              
              // Create batches of 5 repos
              const batches = [];
              for (let i = 0; i < repos.length; i += 5) {
                batches.push(repos.slice(i, i + 5));
              }
              
              console.log(`Created ${batches.length} batches of repositories`);
              // Output for GitHub Actions
              fs.writeFileSync(process.env.GITHUB_OUTPUT, `batches=${JSON.stringify(batches)}\n`, {flag: "a"});
            } catch (e) {
              console.error("Error processing repositories:", e.message);
              fs.writeFileSync(process.env.GITHUB_OUTPUT, "batches=[]\n", {flag: "a"});
            }
          '

  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: Run Renovate on Batch
        run: |
          # Use node to process the batch and generate comma-separated repo list
          node -e '
            const batch = JSON.parse(process.argv[1]);
            if (batch && batch.length > 0) {
              const repoList = batch.join(",");
              console.log(`Processing repositories: ${repoList}`);
              console.log(`::set-output name=repo_list::${repoList}`);
            } else {
              console.log("No repositories to process in this batch");
              console.log("::set-output name=repo_list::");
            }
          ' '${{ toJson(matrix.batch) }}'
          
          # Get the repo list from the node script output
          REPOS=$(node -e 'console.log(process.env.BATCH_JSON ? JSON.parse(process.env.BATCH_JSON).join(",") : "")' )
          
          # Run Renovate on the specific repositories if any were found
          if [ -n "$REPOS" ]; then
            echo "Processing: $REPOS"
            renovate $REPOS
          else
            echo "No repositories to process in this batch"
          fi
        env:
          BATCH_JSON: ${{ toJson(matrix.batch) }}
          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