#!/usr/bin/env bash
# Flaky test scanner — 连续运行测试检测不稳定测试
# 用法:
#   bash scripts/flaky-scan.sh               # 随机顺序运行 3 次全量测试
#   bash scripts/flaky-scan.sh --runs 5      # 指定运行次数
#   bash scripts/flaky-scan.sh --spec <文件>  # 指定测试文件
#   bash scripts/flaky-scan.sh --help        # 显示帮助

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
PROJECT_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
APP_DIR="${PROJECT_DIR}/everything-is-suitable-uniapp"

RUNS=3
SPEC=""
VERBOSE=0

# 颜色
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m' # No Color

usage() {
  echo "Usage: $0 [options]"
  echo ""
  echo "Options:"
  echo "  --runs <N>      运行次数 (default: 3)"
  echo "  --spec <file>   指定测试文件"
  echo "  --verbose       详细输出"
  echo "  --help          显示此帮助"
  exit 0
}

while [[ $# -gt 0 ]]; do
  case "$1" in
    --runs) RUNS="$2"; shift 2 ;;
    --spec) SPEC="$2"; shift 2 ;;
    --verbose) VERBOSE=1; shift ;;
    --help) usage ;;
    *) echo "Unknown option: $1"; usage ;;
  esac
done

if [ ! -d "$APP_DIR" ]; then
  echo "错误: 未找到应用目录 ${APP_DIR}"
  exit 1
fi

cd "$APP_DIR"

echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
echo "  Flaky Test Scanner"
echo "  运行次数: ${RUNS}"
echo "  测试文件: ${SPEC:-全部}"
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"

PASS_COUNT=0
FAIL_COUNT=0
declare -a FAILED_RUNS

for i in $(seq 1 "$RUNS"); do
  echo ""
  echo "  [${i}/${RUNS}] 运行中..."

  if [ -n "$SPEC" ]; then
    CMD="npx vitest run --reporter=verbose \"$SPEC\""
  else
    CMD="npx vitest run --reporter=verbose"
  fi

  if [ "$VERBOSE" -eq 1 ]; then
    echo "  → $CMD"
  fi

  set +e
  OUTPUT=$(eval "$CMD" 2>&1)
  EXIT_CODE=$?
  set -e

  if [ "$EXIT_CODE" -eq 0 ]; then
    echo -e "  [${i}/${RUNS}] ${GREEN}PASS${NC}"
    PASS_COUNT=$((PASS_COUNT + 1))
  else
    echo -e "  [${i}/${RUNS}] ${RED}FAIL${NC} (exit code: ${EXIT_CODE})"
    FAIL_COUNT=$((FAIL_COUNT + 1))
    FAILED_RUNS+=("$i")
    if [ "$VERBOSE" -eq 1 ]; then
      echo "  --- 失败输出 ---"
      echo "$OUTPUT" | tail -50
      echo "  ---"
    fi
  fi
done

echo ""
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
echo "  结果汇总"
echo "  PASS: ${PASS_COUNT}/${RUNS}"
echo "  FAIL: ${FAIL_COUNT}/${RUNS}"

if [ "$FAIL_COUNT" -eq 0 ]; then
  echo -e "  ${GREEN}结论: 未检测到 flaky 测试，测试稳定 ✓${NC}"
  exit 0
else
  echo -e "  ${RED}结论: 检测到 flaky 测试${NC}"
  echo "  失败运行: ${FAILED_RUNS[*]}"
  echo ""
  echo "  常见 flaky 根因:"
  echo "  ① vi.clearAllMocks() 不清除 mockResolvedValue 实现"
  echo "  ② 模块级可变 let mock 变量被测试修改未还原"
  echo "  ③ vi.stubGlobal 全局替换未在 afterEach 恢复"
  echo "  ④ waitFor 未 import"
  echo ""
  echo "  建议: 对失败运行使用 --verbose 查看详细输出"
  exit 1
fi