name: '🧠 Gemini CLI Bot: Brain'

on:
  schedule:
    - cron: '0 0 * * *' # Every 24 hours
  workflow_dispatch:
    inputs:
      clear_memory:
        description: 'Clear memory (drops learnings from previous runs)'
        type: 'boolean'
        default: false
      enable_prs:
        description: 'Enable PRs (automatically promote changes to PRs)'
        type: 'boolean'
        default: false

concurrency:
  group: '${{ github.workflow }}-${{ github.ref }}'
  cancel-in-progress: true

jobs:
  reasoning:
    name: 'Brain (Reasoning Layer)'
    runs-on: 'ubuntu-latest'
    if: "github.repository == 'google-gemini/gemini-cli'"
    # The reasoning phase is strictly readonly.
    permissions:
      contents: 'read'
      issues: 'read'
      pull-requests: 'read'
      actions: 'read'
    env:
      GEMINI_CLI_TRUST_WORKSPACE: 'true'
    steps:
      - name: 'Checkout'
        uses: 'actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8' # ratchet:actions/checkout@v5
        with:
          fetch-depth: 0

      - name: 'Setup Node.js'
        uses: 'actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020' # ratchet:actions/setup-node@v4
        with:
          node-version: '20'
          cache: 'npm'

      - name: 'Install dependencies'
        run: 'npm ci'

      - name: 'Build Gemini CLI'
        run: 'npm run bundle'

      - name: 'Download Previous State'
        env:
          GITHUB_TOKEN: '${{ secrets.GITHUB_TOKEN }}'
        run: |
          if [ "${{ github.event.inputs.clear_memory }}" = "true" ]; then
            echo "Memory clear requested. Skipping previous state download."
            exit 0
          fi

          # Find the last successful run of this workflow
          LAST_RUN_ID=$(gh run list --workflow "${{ github.workflow }}" --status success --limit 1 --json databaseId --jq '.[0].databaseId')

          if [ -n "$LAST_RUN_ID" ]; then
            echo "Found previous successful run: $LAST_RUN_ID"
            
            # Download brain memory (lessons learned and scripts)
            gh run download "$LAST_RUN_ID" -n lessons-learned -D tools/gemini-cli-bot/ || echo "lessons-learned not found"
            gh run download "$LAST_RUN_ID" -n brain-scripts -D tools/gemini-cli-bot/reflexes/scripts/ || echo "brain-scripts not found"
          else
            echo "No previous successful run found."
          fi

      - name: 'Collect Current Metrics'
        env:
          GITHUB_TOKEN: '${{ secrets.GITHUB_TOKEN }}'
        run: 'npx tsx tools/gemini-cli-bot/metrics/index.ts'

      - name: 'Prepare Metrics'
        run: |
          if [ -f "tools/gemini-cli-bot/history/metrics-before.csv" ]; then
            mv tools/gemini-cli-bot/history/metrics-before.csv tools/gemini-cli-bot/history/metrics-before-prev.csv
          fi

      - name: 'Run Brain Phases'
        env:
          GEMINI_API_KEY: '${{ secrets.GEMINI_API_KEY }}'
          GITHUB_TOKEN: '${{ secrets.GITHUB_TOKEN }}'
          GEMINI_MODEL: 'gemini-3-flash-preview'
          ENABLE_PRS: "${{ github.event.inputs.enable_prs || 'false' }}"
        run: 'node bundle/gemini.js --policy tools/gemini-cli-bot/ci-policy.toml tools/gemini-cli-bot/brain/metrics.md'

      - name: 'Generate Patch'
        if: "${{ github.event.inputs.enable_prs == 'true' }}"
        run: |
          git add .
          git diff --staged > bot-changes.patch
          # Ensure file exists even if empty so upload-artifact doesn't fail if we decide to upload it
          touch bot-changes.patch
          touch pr-description.md

      - name: 'Stash Brain Outputs'
        uses: 'actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02' # ratchet:actions/upload-artifact@v4
        with:
          name: 'brain-outputs'
          path: |
            tools/gemini-cli-bot/lessons-learned.md
            tools/gemini-cli-bot/reflexes/scripts/
            bot-changes.patch
            pr-description.md
          retention-days: 1

  publish:
    name: 'Publish Artifacts (Archive Layer)'
    needs: reasoning
    runs-on: 'ubuntu-latest'
    if: "github.repository == 'google-gemini/gemini-cli'"
    # The publish phase is for archiving artifacts and optionally creating PRs.
    permissions:
      contents: 'write'
      pull-requests: 'write'
      actions: 'write'
    steps:
      - name: 'Checkout'
        uses: 'actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8' # ratchet:actions/checkout@v5
        with:
          fetch-depth: 0

      - name: 'Download Brain Outputs'
        uses: 'actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093' # ratchet:actions/download-artifact@v4
        with:
          name: 'brain-outputs'
          path: 'temp_outputs/'

      - name: 'Create PR from Patch'
        if: "${{ github.event.inputs.enable_prs == 'true' }}"
        env:
          GITHUB_TOKEN: '${{ secrets.GITHUB_TOKEN }}'
        run: |
          if [ -s temp_outputs/bot-changes.patch ]; then
            git config user.name "github-actions[bot]"
            git config user.email "github-actions[bot]@users.noreply.github.com"
            
            BRANCH_NAME="bot/productivity-updates-$(date +'%Y%m%d%H%M%S')"
            git checkout -b "$BRANCH_NAME"
            
            git apply temp_outputs/bot-changes.patch
            git add .
            
            if [ -s temp_outputs/pr-description.md ]; then
              git commit -F temp_outputs/pr-description.md
            else
              git commit -m "🤖 Gemini Bot Productivity Optimizations"
            fi
            
            git push origin "$BRANCH_NAME"
            
            PR_TITLE="🤖 Gemini Bot Productivity Optimizations"
            if [ -s temp_outputs/pr-description.md ]; then
              PR_TITLE=$(head -n 1 temp_outputs/pr-description.md)
            fi
            
            gh pr create --draft --title "$PR_TITLE" --body-file temp_outputs/pr-description.md --head "$BRANCH_NAME" --base main || \
            gh pr create --draft --title "🤖 Gemini Bot Productivity Optimizations" --body "Automated changes generated by Gemini CLI Bot." --head "$BRANCH_NAME" --base main
          else
            echo "No patch found or patch is empty. Skipping PR creation."
          fi

      - name: 'Archive Lessons Learned'
        uses: 'actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02' # ratchet:actions/upload-artifact@v4
        with:
          name: 'lessons-learned'
          path: 'temp_outputs/lessons-learned.md'
          retention-days: 90

      - name: 'Archive Brain Scripts'
        uses: 'actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02' # ratchet:actions/upload-artifact@v4
        with:
          name: 'brain-scripts'
          path: 'temp_outputs/reflexes/scripts/'
          retention-days: 90