#!/usr/bin/env bash
# SessionStart hook: 启动时输出项目关键上下文和提醒
# 不阻止会话启动，仅输出提示信息
set -euo pipefail

PROJECT_DIR="${AGENT_PROJECT_DIR:-$(pwd)}"
cd "$PROJECT_DIR"

echo ""
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
echo "  万事宜 (Everything Is Suitable) — 项目上下文"
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"

# 当前分支
BRANCH=$(git branch --show-current 2>/dev/null || echo "未知")
echo "  分支: $BRANCH"

# 变更文件统计
STAGED=$(git diff --cached --name-only 2>/dev/null | wc -l | tr -d ' ')
UNSTAGED=$(git diff --name-only 2>/dev/null | wc -l | tr -d ' ')
echo "  变更: ${STAGED} 个暂存, ${UNSTAGED} 个未暂存"

# 检测关键文件变更
CHANGED_FILES=$(git diff --name-only HEAD 2>/dev/null; git diff --cached --name-only 2>/dev/null; git ls-files --others --exclude-standard 2>/dev/null | sort -u)
HAS_ALGORITHM_CHANGE=""
HAS_TEST_CHANGE=""
HAS_LOCALE_CHANGE=""
HAS_COMPONENT_CHANGE=""

while IFS= read -r f; do
  [ -z "$f" ] && continue
  case "$f" in
    */algorithms/*) HAS_ALGORITHM_CHANGE="yes" ;;
    */__tests__/*|*.spec.*|*.test.*) HAS_TEST_CHANGE="yes" ;;
    */locales/*) HAS_LOCALE_CHANGE="yes" ;;
    */components/*) HAS_COMPONENT_CHANGE="yes" ;;
  esac
done <<< "$CHANGED_FILES"

# 变更提醒
if [ -n "$HAS_ALGORITHM_CHANGE" ]; then
  echo ""
  echo "  ⚠️  检测到算法文件变更，请确保:"
  echo "  ┌─ 测试覆盖 ─────────────────────────────────┐"
  echo "  │  npx vitest run algorithms/__tests__/       │"
  echo "  ├─ 交叉验证 ─────────────────────────────────┤"
  echo "  │  算法结果须与传统典籍/已知实现交叉验证       │"
  echo "  └────────────────────────────────────────────────┘"
  echo ""
fi

if [ -n "$HAS_TEST_CHANGE" ]; then
  echo "  ⚠️  检测到测试文件变更，请确保:"
  echo "  ┌─ 运行验证 ─────────────────────────────────┐"
  echo "  │  npm test                                    │"
  echo "  ├─ Flaky 检查 ────────────────────────────────┤"
  echo "  │  新增测试至少连续运行 3 次确认稳定性         │"
  echo "  └────────────────────────────────────────────────┘"
  echo ""
fi

if [ -n "$HAS_LOCALE_CHANGE" ]; then
  echo "  ⚠️  检测到国际化文件变更，请确保同步所有语言:"
  echo "  locales/zh-CN.ts  locales/en.ts  locales/ja.ts ..."
  echo ""
fi

if [ -n "$HAS_COMPONENT_CHANGE" ]; then
  echo "  ⚠️  检测到组件变更，请确保:"
  echo "  ┌─ 单元测试 ─────────────────────────────────┐"
  echo "  │  npx vitest run components/                  │"
  echo "  ├─ E2E 测试 ──────────────────────────────────┤"
  echo "  │  npm run test:e2e                             │"
  echo "  └────────────────────────────────────────────────┘"
  echo ""
fi

# Skill 推荐
echo "  🎯 Skill 推荐（基于变更类型）:"
if [ -n "$HAS_ALGORITHM_CHANGE" ]; then
  echo "    算法 → TDD / systematic-debugging"
fi
if [ -n "$HAS_TEST_CHANGE" ]; then
  echo "    测试 → TDD / systematic-debugging"
fi
if [ -n "$HAS_COMPONENT_CHANGE" ]; then
  echo "    组件 → frontend-design / impeccable"
fi
echo ""

echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
echo ""