name: "AI Code Review (Skill-Driven)"

on:
  pull_request:
    types: [opened, synchronize]

jobs:
  review_with_skill:
    runs-on: ubuntu-latest
    steps:
      # 1. 拉取代码及 Skill 规则文件
      - name: Checkout Code & Skills
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      # 2. 运行 AI 审查脚本
      - name: Run Review Engine
        env:
          # 🔑 中转站 API Key（在 Gitea Secrets 配置）
          API_KEY: ${{ secrets.LLM_API_KEY }}
          # 🌐 中转站 Base URL（在 Gitea Secrets 配置）
          BASE_URL: ${{ secrets.LLM_BASE_URL }}
          # 🤖 选择的模型名称（按需修改）
          MODEL_NAME: "gpt-4o"
          # Gitea 自动注入的 Token，无需手动配置
          GITEA_TOKEN: ${{ gitea.token }}
          GITEA_SERVER_URL: ${{ gitea.server_url }}
          GITEA_REPOSITORY: ${{ gitea.repository }}
          GITEA_PR_NUMBER: ${{ gitea.event.number }}
          GITEA_BASE_REF: ${{ gitea.base_ref }}
          GITEA_HEAD_REF: ${{ gitea.head_ref }}
        run: |
          # 提取当前 PR 的代码差异
          git diff origin/$GITEA_BASE_REF...origin/$GITEA_HEAD_REF > diff.txt

          # 使用 Python 执行审查（纯标准库，无需 pip install）
          python3 -c "
          import os, json, urllib.request, urllib.error

          # ========== 1. 读取 Skill 规则书 ==========
          skill_base_path = '.claude/skills/code-review-skill/'
          try:
              skill_config = open(os.path.join(skill_base_path, 'SKILL.md'), encoding='utf-8').read()
              python_rules = open(os.path.join(skill_base_path, 'reference/python.md'), encoding='utf-8').read()
          except FileNotFoundError as e:
              print(f'❌ 未找到 Skill 规则文件: {e}'); exit(1)

          full_skill_prompt = f'{skill_config}\n\n以下是针对当前语言的补充规范：\n{python_rules}'

          # ========== 2. 读取代码变动 ==========
          diff_data = open('diff.txt', encoding='utf-8').read()
          if not diff_data.strip():
              print('✅ 没有检测到代码变更，跳过审查。'); exit(0)

          # ========== 3. 调用中转站大模型 API ==========
          base_url = os.getenv('BASE_URL', 'https://api.maxmodel.com/v1').rstrip('/')
          api_url = f'{base_url}/chat/completions'
          model_name = os.getenv('MODEL_NAME', 'gpt-4o')

          print(f'🚀 正在调用模型: {model_name} @ {base_url}')

          headers = {
              'Authorization': f'Bearer {os.getenv(\"API_KEY\")}',
              'Content-Type': 'application/json'
          }
          payload = {
              'model': model_name,
              'messages': [
                  {'role': 'system', 'content': full_skill_prompt},
                  {'role': 'user', 'content': f'请严格对照上述 Skill 规范，评审以下 FastAPI 代码改动，并用中文输出评审意见：\n\n{diff_data}'}
              ],
              'temperature': 0.2
          }

          req = urllib.request.Request(api_url, data=json.dumps(payload).encode('utf-8'), headers=headers, method='POST')
          try:
              with urllib.request.urlopen(req, timeout=120) as response:
                  res = json.loads(response.read().decode('utf-8'))
              comment_body = res['choices'][0]['message']['content']
              print('✅ 大模型已返回审查意见')
          except urllib.error.HTTPError as e:
              error_body = e.read().decode('utf-8')
              print(f'❌ 请求中转站失败 [{e.code}]: {error_body}'); exit(1)
          except Exception as e:
              print(f'❌ 请求中转站异常: {e}'); exit(1)

          # ========== 4. 发表到 Gitea PR 评论区 ==========
          gitea_url = f'{os.getenv(\"GITEA_SERVER_URL\")}/api/v1/repos/{os.getenv(\"GITEA_REPOSITORY\")}/issues/{os.getenv(\"GITEA_PR_NUMBER\")}/comments'
          gitea_headers = {
              'Authorization': f'token {os.getenv(\"GITEA_TOKEN\")}',
              'Content-Type': 'application/json'
          }
          gitea_payload = {'body': f'### 🤖 AI 自动化审查报告 (基于 Code Review Skill)\n\n> 模型: \`{model_name}\` | 中转站: maxmodel\n\n{comment_body}'}

          gitea_req = urllib.request.Request(gitea_url, data=json.dumps(gitea_payload).encode('utf-8'), headers=gitea_headers, method='POST')
          try:
              urllib.request.urlopen(gitea_req, timeout=30)
              print('🎉 Skill 审查报告已成功发表到 PR！')
          except Exception as e:
              print(f'❌ 发表评论失败: {e}'); exit(1)
          "