#!/bin/bash

# Git跟踪清理脚本
# 用于移除已被跟踪但应该被忽略的文件和目录

set -e

echo "🧹 Git跟踪清理脚本"
echo "===================="

# 检查是否在Git仓库中
if ! git rev-parse --git-dir > /dev/null 2>&1; then
    echo "❌ 当前目录不是Git仓库"
    exit 1
fi

# 显示当前状态
echo "📊 当前Git状态:"
git status --short

echo ""
echo "🔍 检查需要移除跟踪的目录..."

# 检查build目录
if git ls-files | grep -q "^build/"; then
    echo "📁 发现被跟踪的build目录"
    BUILD_TRACKED=true
else
    echo "✅ build目录未被跟踪"
    BUILD_TRACKED=false
fi

# 检查dist目录
if git ls-files | grep -q "^dist/"; then
    echo "📁 发现被跟踪的dist目录"
    DIST_TRACKED=true
else
    echo "✅ dist目录未被跟踪"
    DIST_TRACKED=false
fi

# 检查其他常见的应该被忽略的文件
echo ""
echo "🔍 检查其他应该被忽略的文件..."

SHOULD_IGNORE_FILES=(
    "*.pyc"
    "__pycache__"
    "*.log"
    "*.tmp"
    "*.temp"
    ".DS_Store"
    "Thumbs.db"
    "users.db"
)

FOUND_FILES=()
for pattern in "${SHOULD_IGNORE_FILES[@]}"; do
    if git ls-files | grep -q "$pattern"; then
        echo "📄 发现被跟踪的文件: $pattern"
        FOUND_FILES+=("$pattern")
    fi
done

# 如果没有需要清理的内容
if [ "$BUILD_TRACKED" = false ] && [ "$DIST_TRACKED" = false ] && [ ${#FOUND_FILES[@]} -eq 0 ]; then
    echo ""
    echo "🎉 没有发现需要清理的跟踪文件"
    echo "✅ .gitignore规则应该已经生效"
    exit 0
fi

# 询问用户是否继续
echo ""
echo "⚠️  将要执行以下操作:"
if [ "$BUILD_TRACKED" = true ]; then
    echo "   - 移除build/目录的Git跟踪"
fi
if [ "$DIST_TRACKED" = true ]; then
    echo "   - 移除dist/目录的Git跟踪"
fi
for file in "${FOUND_FILES[@]}"; do
    echo "   - 移除$file文件的Git跟踪"
done
echo ""
echo "注意: 这只会移除Git跟踪，不会删除本地文件"
echo ""

read -p "是否继续? (y/N): " -n 1 -r
echo
if [[ ! $REPLY =~ ^[Yy]$ ]]; then
    echo "❌ 操作已取消"
    exit 1
fi

echo ""
echo "🔄 开始清理Git跟踪..."

# 移除build目录跟踪
if [ "$BUILD_TRACKED" = true ]; then
    echo "📁 移除build目录跟踪..."
    git rm -r --cached build/ || echo "⚠️  build目录移除失败（可能已经移除）"
fi

# 移除dist目录跟踪
if [ "$DIST_TRACKED" = true ]; then
    echo "📁 移除dist目录跟踪..."
    git rm -r --cached dist/ || echo "⚠️  dist目录移除失败（可能已经移除）"
fi

# 移除其他文件跟踪
for pattern in "${FOUND_FILES[@]}"; do
    echo "📄 移除$pattern文件跟踪..."
    git rm --cached -r "$pattern" 2>/dev/null || echo "⚠️  $pattern移除失败（可能已经移除）"
done

# 显示更改后的状态
echo ""
echo "📊 清理后的Git状态:"
git status --short

# 询问是否提交更改
echo ""
read -p "是否提交这些更改? (y/N): " -n 1 -r
echo
if [[ $REPLY =~ ^[Yy]$ ]]; then
    echo "💾 提交更改..."
    git add .gitignore
    git commit -m "Remove build/, dist/ and other generated files from Git tracking

- Remove build/ directory from tracking
- Remove dist/ directory from tracking  
- Update .gitignore to prevent future tracking
- These directories contain generated/compiled files that should not be versioned"
    
    echo ""
    echo "✅ 更改已提交"
    echo ""
    read -p "是否推送到远程仓库? (y/N): " -n 1 -r
    echo
    if [[ $REPLY =~ ^[Yy]$ ]]; then
        echo "🚀 推送到远程..."
        git push
        echo "✅ 已推送到远程仓库"
    else
        echo "⚠️  记得稍后推送: git push"
    fi
else
    echo "⚠️  更改未提交，记得稍后提交:"
    echo "   git add .gitignore"
    echo "   git commit -m 'Remove generated files from Git tracking'"
    echo "   git push"
fi

echo ""
echo "🎉 清理完成！"
echo ""
echo "💡 说明:"
echo "- build/和dist/目录现在不会被Git跟踪"
echo "- 本地文件仍然存在，只是不再被版本控制"
echo "- 远程仓库在下次推送后会移除这些文件"
echo "- 其他开发者拉取更新后，这些目录也会从他们的Git跟踪中移除"