name: Gemini Review

on:
  pull_request:
    types: [opened, synchronize] # Runs on new PRs and updates

jobs:
  Gemini:
    runs-on: local
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          ref: ${{ github.ref }}
          fetch-tags: true

      - name: Check if last commit is from Renovate Bot
        id: check-renovate
        run: |
          AUTHOR=$(git log -1 --pretty=format:'%an')
          echo "Author is $AUTHOR"
          echo "author=$AUTHOR" >> "$GITHUB_OUTPUT"

      - name: Set Tea Version
        id: tea_version
        run: echo "version=0.9.2" >> $GITHUB_OUTPUT # Check for the latest version

      - name: Download Tea CLI
        run: |
          TEA_VERSION=$(echo "${{ steps.tea_version.outputs.version }}")
          wget "https://gitea.com/gitea/tea/releases/download/v${TEA_VERSION}/tea-${TEA_VERSION}-linux-amd64" -O tea
          chmod +x tea
          mv tea /usr/local/bin/tea

      - name: Verify Tea Installation
        run: tea --version

      - name: Add Gitea Login
        env:
          GITEA_URL: ${{ secrets._GITEA_URL }}
          GITEA_TOKEN: ${{ secrets._GITEA_TOKEN }}
        run: |
          if [ -z "$GITEA_URL" ]; then
            echo "Error: GITEA_URL secret is not set."
            exit 1
          fi
          if [ -z "$GITEA_TOKEN" ]; then
            echo "Error: GITEA_TOKEN secret is not set."
            exit 1
          fi
          tea login add --name mygitea --url "$GITEA_URL" --token "$GITEA_TOKEN" --insecure ${{ startsWith(secrets._GITEA_URL, 'http://') || '' }}

      - name: Install bun
        uses: oven-sh/setup-bun@v2

      - name: Install claude code
        run: bun i -g @anthropic-ai/claude-code

      - name: Get PR Diff
        id: get_pr_diff
        run: |
          # Fetch the base branch to get the diff accurately
          git fetch origin main:main
          DIFF=$(git diff main...HEAD)
          # Escape quotes and other special characters for the multiline string
          ESCAPED_DIFF=$(echo "$DIFF" | sed 's/"/\\"/g' | sed ':a;N;$!ba;s/\n/\\n/g')
          echo "diff=$ESCAPED_DIFF" >> "$GITHUB_OUTPUT"

      - name: Gemini PR Review
        if: steps.check-renovate.outputs.author != 'Renovate Bot'
        env:
          ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}
          PR_NUMBER: ${{ github.event.number }}
          PR_DIFF: ${{ steps.get_pr_diff.outputs.diff }}
        run: |
          ANTHROPIC_BASE_URL=${{ secrets.ANTHROPIC_BASE_URL }} claude --allowedTools "Bash(tea:*)" --allowedTools "Bash(git:*) Read Grep WebFetch Glob LS" -p "You are a code review assistant. Your task is to review the changes in Pull Request #${PR_NUMBER}. The relevant changes are provided as a git diff below.

          --- Start of PR Diff ---
          ${PR_DIFF}
          --- End of PR Diff ---

          Only provide constructive feedback on the quality, correctness, readability, and potential issues in the code based on the provided diff. Do not make any changes or suggest complete rewrites—just review what is there. You can use the rest of the repository as context if needed, but focus your review on the changes shown in the diff.

          Once you are done with your review, post your feedback as a reject or review on the pull request using the following exact format:

          tea \"<reject or approve>\" ${PR_NUMBER} \"<your review message here>\"

          Make sure the comment is clear, professional, and helpful. Only run the tea comment command once you're finished reviewing all changes.
          ALWAYS PUT A COMMENT

          You may also use the tea cli to find out various things about the pull request.
          Don't be too strict.
          Also MAKE SURE TO ALWAYS MENTION WHAT FILES AND LINE NUMBERS ARE WRONG.
          Use the tea cli at all cost."