#!/usr/bin/env bash
# 自动审批：CI全绿后自动approve PR
# 环境变量：GITHUB_TOKEN, REVIEW_TOKEN, PR_NUMBER, PR_HEAD_SHA, GITHUB_API_URL, GITHUB_REPOSITORY
set -eu

set -eu

echo "PR #${PR_NUMBER} - 检查CI状态并自动审批"

# 检查是否纯前端改动
API_URL="${GITHUB_API_URL}/repos/${GITHUB_REPOSITORY}/pulls/${PR_NUMBER}/files?limit=300"
FILES=$(curl -s -H "Authorization: token ${GITHUB_TOKEN}" "$API_URL" | python3 -c "import sys,json; [print(f['filename']) for f in json.load(sys.stdin)]")
FRONTEND_COUNT=$(echo "$FILES" | grep -c '^apps/web/' || true)
BACKEND_COUNT=$(echo "$FILES" | grep -cv '^apps/web/' || true)
TOTAL=$(echo "$FILES" | grep -cv '^$' || true)
echo "变更文件: ${TOTAL} 个 (前端: ${FRONTEND_COUNT}, 后端/公共: ${BACKEND_COUNT})"

if [ "$BACKEND_COUNT" = "0" ] && [ "$FRONTEND_COUNT" -gt "0" ]; then
  SKIP_BACKEND=true
  echo "✅ 纯前端改动，只检查Frontend Lint"
else
  SKIP_BACKEND=false
  echo "🔧 包含后端/公共变更，检查全部CI"
fi

# 定义需要检查的context
if [ "$SKIP_BACKEND" = "true" ]; then
  CONTEXTS=("CI/CD Pipeline / Frontend Lint (pull_request)")
else
  CONTEXTS=(
    # CI 优化后 job 名称（2026-08）：Code Quality 拆分为 Style+Security，Type Check+Migration 合并为 Python
    # 与 pr_auto_scan.py 的 REQUIRED_CONTEXTS_APPROVE 保持一致
    "CI/CD Pipeline / Validate - Style (pull_request)"
    "CI/CD Pipeline / Validate - Security (pull_request)"
    "CI/CD Pipeline / Validate - Python (mypy + alembic) (pull_request)"
    "CI/CD Pipeline / Frontend Lint (pull_request)"
  )
fi

echo "需要通过的CI检查: ${#CONTEXTS[@]} 项（与分支保护required门禁一致）"
for ctx in "${CONTEXTS[@]}"; do
  echo "  - $ctx"
done
echo

# 初始等待30秒，给CI启动写status的时间
echo "等待30秒让CI启动..."
sleep 30

# 轮询等待，最多20分钟（120次x10秒）
for attempt in $(seq 1 12); do  # 短作业模式：最多等2分钟(12次x10秒)，不满足就退出等下次触发
  ALL_SUCCESS=true
  ANY_FAILED=false
  ANY_PENDING=false

  echo "--- 第${attempt}次检查 ($(date '+%H:%M:%S')) ---"

  # 调用辅助脚本检查每个context状态
  for ctx in "${CONTEXTS[@]}"; do
    STATE=$(python3 scripts/check_ci_status.py "$GITHUB_TOKEN" "$GITHUB_REPOSITORY" "$PR_HEAD_SHA" "$ctx")
    echo "  $ctx: $STATE"

    if [ "$STATE" != "success" ]; then
      ALL_SUCCESS=false
    fi
    if [ "$STATE" = "failure" ] || [ "$STATE" = "error" ]; then
      ANY_FAILED=true
    fi
    if [ "$STATE" = "pending" ] || [ "$STATE" = "null" ]; then
      ANY_PENDING=true
    fi
  done

  if [ "$ALL_SUCCESS" = "true" ]; then
    echo
    echo "✅ 所有CI检查通过，自动审批 PR #${PR_NUMBER}"

    # 检查是否已有审批
    EXISTING=$(curl -s -H "Authorization: token ${REVIEW_TOKEN}" \
      "${GITHUB_API_URL}/repos/${GITHUB_REPOSITORY}/pulls/${PR_NUMBER}/reviews" \
      | python3 -c "import sys,json; reviews=json.load(sys.stdin); print('yes' if any(r.get('state')=='APPROVED' for r in reviews) else 'no')")

    if [ "$EXISTING" = "yes" ]; then
      echo "ℹ️  PR #${PR_NUMBER} 已有审批，跳过"
      exit 0
    fi

    # 第一步：创建PENDING review
    echo "创建review..."
    REVIEW_CREATE=$(curl -s -X POST \
      -H "Authorization: token ${REVIEW_TOKEN}" \
      -H "Content-Type: application/json" \
      -d '{"event": "PENDING", "body": "CI全绿，自动审批通过。"}' \
      "${GITHUB_API_URL}/repos/${GITHUB_REPOSITORY}/pulls/${PR_NUMBER}/reviews")
    
    REVIEW_ID=$(echo "$REVIEW_CREATE" | python3 -c "import sys,json; print(json.load(sys.stdin).get('id',''))")
    REVIEW_STATE=$(echo "$REVIEW_CREATE" | python3 -c "import sys,json; print(json.load(sys.stdin).get('state',''))")
    echo "创建结果: id=$REVIEW_ID state=$REVIEW_STATE"

    if [ -z "$REVIEW_ID" ]; then
      echo "❌ 创建review失败"
      echo "$REVIEW_CREATE"
      exit 1
    fi

    if [ "$REVIEW_STATE" = "APPROVED" ]; then
      echo "✅ 自动审批成功（直接创建为APPROVED）"
      exit 0
    fi

    # 第二步：submit review为APPROVED
    echo "提交review审批..."
    SUBMIT_CODE=$(curl -s -o /tmp/submit_resp.json -w "%{http_code}" \
      -X POST \
      -H "Authorization: token ${REVIEW_TOKEN}" \
      -H "Content-Type: application/json" \
      -d '{"event": "APPROVED", "body": "CI全绿，自动审批通过。"}' \
      "${GITHUB_API_URL}/repos/${GITHUB_REPOSITORY}/pulls/${PR_NUMBER}/reviews/${REVIEW_ID}")
    
    echo "提交API HTTP状态: $SUBMIT_CODE"
    cat /tmp/submit_resp.json 2>/dev/null || true
    echo

    if [ "$SUBMIT_CODE" = "200" ] || [ "$SUBMIT_CODE" = "201" ]; then
      FINAL_STATE=$(python3 -c "import json; print(json.load(open('/tmp/submit_resp.json')).get('state',''))" 2>/dev/null || echo "?")
      echo "✅ 自动审批成功 (state: $FINAL_STATE)"
      exit 0
    else
      echo "❌ 提交审批失败"
      exit 1
    fi
  fi

  # 还有CI在跑 → 继续等
  if [ "$ANY_PENDING" = "true" ]; then
    echo "⏳ CI仍在运行中（第${attempt}/12次），超时后将退出等待下次触发..."
    sleep 10
    continue
  fi

  # 所有CI都跑完了但有失败 → 退出
  if [ "$ANY_FAILED" = "true" ]; then
    echo
    echo "❌ CI检查有失败项，不自动审批"
    exit 0
  fi

  sleep 10
done

echo
echo "⏰ 快速检查超时（2分钟），CI尚未完成，退出等待下次触发（workflow_run事件或5分钟定时扫描）"
exit 0