# PR 合并后自动关闭关联的 Issue
# 当 PR 从 ai_fix/N_xxx 分支合并到 main 时，关闭 #N 对应的 Issue（若 PR 描述中未含 Closes #N 则通过分支名解析）
# 关闭后发送 Telegram 通知（复用 TELEGRAM_BOT_TOKEN / TELEGRAM_CHAT_ID）

name: Close issue on PR merge

on:
  pull_request:
    types: [closed]
    branches: [main]

jobs:
  close-issue:
    if: github.event.pull_request.merged == true
    runs-on: ubuntu-latest
    permissions:
      issues: write
      pull-requests: read

    steps:
      - name: Get PR info
        id: pr
        run: |
          # 从 PR body 查找 Closes #N / Fixes #N（若已有则 GitHub 已自动关 issue，本 step 仅做解析）
          BODY="${{ github.event.pull_request.body }}"
          HEAD_REF="${{ github.event.pull_request.head.ref }}"

          # 优先从 PR 描述解析（无匹配时 grep 会 exit 1，需 || true 避免 set -e 导致脚本退出）
          ISSUE_NUM=$(echo "$BODY" | grep -oE '(Closes|Fixes|Resolves) #([0-9]+)' | head -1 | grep -oE '[0-9]+' || true)
          if [ -z "$ISSUE_NUM" ]; then
            # 从分支名解析 ai_fix/N_xxx
            ISSUE_NUM=$(echo "$HEAD_REF" | sed -n 's|^ai_fix/\([0-9]*\)_.*|\1|p')
          fi

          if [ -z "$ISSUE_NUM" ]; then
            echo "ISSUE_NUMBER=" >> $GITHUB_OUTPUT
            echo "skip=true" >> $GITHUB_OUTPUT
            echo "未从 PR 描述或分支名解析到 Issue 编号，跳过关闭"
            exit 0
          fi

          echo "ISSUE_NUMBER=$ISSUE_NUM" >> $GITHUB_OUTPUT
          echo "skip=false" >> $GITHUB_OUTPUT
          echo "解析到 Issue #$ISSUE_NUM"

      - name: Get issue details
        if: steps.pr.outputs.skip != 'true'
        id: issue
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          ISSUE_NUM="${{ steps.pr.outputs.ISSUE_NUMBER }}"
          # 获取 issue 标题与 URL（用于 TG 消息）
          JSON=$(gh issue view "$ISSUE_NUM" --json title,url 2>/dev/null || echo '{"title":"","url":""}')
          TITLE=$(echo "$JSON" | jq -r '.title')
          ISSUE_URL=$(echo "$JSON" | jq -r '.url')
          echo "title<<EOF" >> $GITHUB_OUTPUT
          echo "$TITLE" >> $GITHUB_OUTPUT
          echo "EOF" >> $GITHUB_OUTPUT
          echo "url=$ISSUE_URL" >> $GITHUB_OUTPUT

      - name: Close issue
        if: steps.pr.outputs.skip != 'true'
        uses: actions/github-script@v7
        with:
          script: |
            const issueNumber = parseInt('${{ steps.pr.outputs.ISSUE_NUMBER }}', 10);
            if (!issueNumber || isNaN(issueNumber)) {
              console.log('No valid issue number, skip');
              return;
            }
            const { data: issue } = await github.rest.issues.get({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: issueNumber
            });
            if (issue.state === 'open') {
              await github.rest.issues.update({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: issueNumber,
                state: 'closed'
              });
              console.log(`Issue #${issueNumber} closed.`);
            } else {
              console.log(`Issue #${issueNumber} already closed.`);
            }

      - name: Send Telegram notification
        if: steps.pr.outputs.skip != 'true'
        env:
          TELEGRAM_BOT_TOKEN: ${{ secrets.TELEGRAM_BOT_TOKEN }}
          TELEGRAM_CHAT_ID: ${{ secrets.TELEGRAM_CHAT_ID }}
        run: |
          # 与 docker-build 一致：未配置则跳过
          if [ -z "$TELEGRAM_BOT_TOKEN" ] || [ -z "$TELEGRAM_CHAT_ID" ]; then
            echo "⚠️  Telegram Bot Token 或 Chat ID 未配置，跳过通知"
            exit 0
          fi

          ISSUE_NUM="${{ steps.pr.outputs.ISSUE_NUMBER }}"
          ISSUE_TITLE="${{ steps.issue.outputs.title }}"
          ISSUE_URL="${{ steps.issue.outputs.url }}"
          PR_URL="${{ github.event.pull_request.html_url }}"

          # 与 docker-build 相同的 HTML 消息格式
          MESSAGE="✅ <b>AI 修复的 Issue 已关闭</b>"$'\n'$'\n'"🔢 <b>Issue:</b> #${ISSUE_NUM} ${ISSUE_TITLE}"$'\n'"📎 <a href=\"${ISSUE_URL}\">查看 Issue</a>"$'\n'"🔗 <a href=\"${PR_URL}\">查看 PR</a>"

          curl -s -X POST "https://api.telegram.org/bot${TELEGRAM_BOT_TOKEN}/sendMessage" \
            -H "Content-Type: application/json" \
            -d "$(jq -n \
              --arg chat_id "$TELEGRAM_CHAT_ID" \
              --arg text "$MESSAGE" \
              '{chat_id: $chat_id, text: $text, parse_mode: "HTML", disable_web_page_preview: false}')" > /tmp/telegram_response.json

          if [ $? -eq 0 ]; then
            RESPONSE=$(cat /tmp/telegram_response.json)
            if echo "$RESPONSE" | grep -q '"ok":true'; then
              echo "✅ Telegram 通知发送成功"
            else
              echo "❌ Telegram 通知发送失败: $RESPONSE"
              exit 0
            fi
          else
            echo "❌ 发送 Telegram 消息时发生错误"
            exit 0
          fi