name: PR Review Automation

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

jobs:
  review:
    runs-on: ubuntu-latest
    steps:
      - name: Get base branch
        run: git fetch origin ${{ github.base_ref }}:${{ github.base_ref }}

      - name: Get PR diff
        id: diff
        run: |
          git config --global --add safe.directory /__w/tftsr-devops_investigation/tftsr-devops_investigation
          git diff origin/${{ github.base_ref }}..${{ github.head_ref }} > /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'
        env:
          OLLAMA_URL: https://ollama-ui.tftsr.com/ollama/v1
          API_KEY: ${{ secrets.OLLAMA_API_KEY }}
        run: |
          DIFF_CONTENT=$(cat /tmp/pr_diff.txt)
          PROMPT="Analyze the following code changes for completion, completeness, correctness, security issues, and best practices. 
          
          PR Title: ${{ github.event.pull_request.title }}
          
          Diff:
          $DIFF_CONTENT
       
          Provide review with: 1) Completion check, 2) Completeness check, 3) Bugs/errors, 4) Security issues, 5) Best practices.
          Then give specific comments with suggested fixes."
          
          RESPONSE=$(curl -s -X POST "$OLLAMA_URL/chat" \
            -H "Authorization: Bearer $API_KEY" \
            -H "Content-Type: application/json" \
            -d "{\"model\":\"qwen3-coder-next:latest\",\"messages\":[{\"role\":\"user\",\"content\":\"$PROMPT\"}],\"stream\":false}")
          
          echo "$RESPONSE" > /tmp/ollama_response.json
          
          REVIEW=$(echo "$RESPONSE" | grep -o '"content":"[^"]*"' | head -1 | sed 's/"content":"//;s/"$//')
          echo "$REVIEW" > /tmp/pr_review.txt

      - name: Post review comment
        if: success()
        env:
          TF_TOKEN: ${{ secrets.TFT_GITEA_TOKEN }}
          PR_NUMBER: ${{ github.event.pull_request.number }}
        run: |
          if [ -f "/tmp/pr_review.txt" ]; then
            REVIEW_BODY=$(cat /tmp/pr_review.txt | head -c 65536)
            curl -s -X POST "https://gogs.tftsr.com/api/v1/repos/sarman/tftsr-devops_investigation/pulls/$PR_NUMBER/reviews" \
              -H "Authorization: token $TF_TOKEN" \
              -H "Content-Type: application/json" \
              -d "{\"body\": \"🤖 Automated PR Review:\n\n$REVIEW_BODY\n\n---\n*this is an automated review from Ollama*\", \"event\": \"COMMENT\"}"
          fi