name: PR Review Automation

on:
  pull_request:
    types: [opened, synchronize, reopened]

jobs:
  review:
    runs-on: ubuntu-latest
    container:
      image: ubuntu:22.04
    steps:
      - name: Install dependencies
        run: |
          set -eux
          apt-get update -qq && apt-get install -y -qq git curl jq

      - name: Checkout code
        run: |
          git init
          git remote add origin http://172.0.0.29:3000/sarman/tftsr-devops_investigation.git
          git fetch --depth=1 origin ${{ github.head_ref }}
          git checkout FETCH_HEAD

      - name: Get PR diff
        id: diff
        run: |
          git fetch origin ${{ github.base_ref }}
          git diff origin/${{ github.base_ref }}..HEAD > /tmp/pr_diff.txt
          echo "diff_size=$(wc -l < /tmp/pr_diff.txt)" >> $GITHUB_OUTPUT

      - name: Analyze with Ollama
        if: steps.diff.outputs.diff_size > '0'
        shell: bash
        env:
          OLLAMA_URL: http://172.0.1.42:11434
        run: |
          DIFF_CONTENT=$(head -c 20000 /tmp/pr_diff.txt)
          PR_TITLE="${{ github.event.pull_request.title }}"
          PROMPT="Analyze the following code changes for correctness, security issues, and best practices. PR Title: ${PR_TITLE}\n\nDiff:\n${DIFF_CONTENT}\n\nProvide a review with: 1) Summary, 2) Bugs/errors, 3) Security issues, 4) Best practices. Give specific comments with suggested fixes."
          BODY=$(jq -n \
            --arg model "qwen3-coder-next:latest" \
            --arg content "$PROMPT" \
            '{model: $model, messages: [{role: "user", content: $content}], stream: false}')
          echo "Request body length: ${#BODY} bytes"
          echo "Calling Ollama API..."
          HTTP_CODE=$(curl -s --max-time 120 -o /tmp/ollama_response.json -w "%{http_code}" \
            -X POST "$OLLAMA_URL/api/chat" \
            -H "Content-Type: application/json" \
            -d "$BODY")
          echo "HTTP status: $HTTP_CODE"
          echo "Response file size: $(wc -c < /tmp/ollama_response.json) bytes"
          echo "Response body (jq pretty-print or raw):"
          jq . /tmp/ollama_response.json 2>/dev/null || cat /tmp/ollama_response.json
          if [ "$HTTP_CODE" != "200" ]; then
            echo "ERROR: Ollama returned HTTP $HTTP_CODE"
            exit 1
          fi
          REVIEW=$(jq -r '.message.content // empty' /tmp/ollama_response.json)
          if [ -z "$REVIEW" ]; then
            echo "ERROR: No content in Ollama response"
            exit 1
          fi
          echo "$REVIEW" > /tmp/pr_review.txt

      - name: Post review comment
        if: success()
        env:
          TF_TOKEN: ${{ secrets.TFT_GITEA_TOKEN }}
          PR_NUMBER: ${{ github.event.pull_request.number }}
        run: |
          if [ -f "/tmp/pr_review.txt" ] && [ -s "/tmp/pr_review.txt" ]; then
            REVIEW_BODY=$(head -c 65536 /tmp/pr_review.txt)
            BODY=$(jq -n \
              --arg body "🤖 Automated PR Review:\n\n${REVIEW_BODY}\n\n---\n*this is an automated review from Ollama*" \
              '{body: $body, event: "COMMENT"}')
            curl -s -X POST "http://172.0.0.29:3000/api/v1/repos/sarman/tftsr-devops_investigation/pulls/$PR_NUMBER/reviews" \
              -H "Authorization: token $TF_TOKEN" \
              -H "Content-Type: application/json" \
              -d "$BODY"
          else
            echo "No review to post"
          fi