#!/bin/bash

# 修复 Git 提交记录中的邮箱地址
# 将 noreply@gitee.com 替换为已注册的邮箱

echo "=========================================="
echo "修复 Git 提交记录中的邮箱地址"
echo "=========================================="
echo ""

# 检查是否在 Git 仓库中
if [ ! -d .git ]; then
    echo "❌ 错误：当前目录不是 Git 仓库"
    exit 1
fi

# 检查是否有未提交的更改
if [ -n "$(git status --porcelain)" ]; then
    echo "⚠️  警告：检测到未提交的更改"
    echo "建议先提交或暂存更改后再执行此脚本"
    read -p "是否继续？(y/n) " -n 1 -r
    echo
    if [[ ! $REPLY =~ ^[Yy]$ ]]; then
        exit 1
    fi
fi

# 配置信息
OLD_EMAIL="noreply@gitee.com"
CORRECT_NAME="renjianbo"
CORRECT_EMAIL="263303411@qq.com"

echo "将修改以下邮箱地址："
echo "  旧邮箱: $OLD_EMAIL"
echo "  新邮箱: $CORRECT_EMAIL"
echo "  作者名: $CORRECT_NAME"
echo ""

# 检查是否有使用旧邮箱的提交
COMMITS_WITH_OLD_EMAIL=$(git log --format='%H' --author="$OLD_EMAIL" | wc -l)

if [ "$COMMITS_WITH_OLD_EMAIL" -eq 0 ]; then
    echo "✅ 没有找到使用 $OLD_EMAIL 的提交，无需修改"
    exit 0
fi

echo "找到 $COMMITS_WITH_OLD_EMAIL 个使用旧邮箱的提交"
echo ""

# 创建备份分支
BACKUP_BRANCH="backup-$(date +%Y%m%d-%H%M%S)"
echo "创建备份分支: $BACKUP_BRANCH"
git branch "$BACKUP_BRANCH"
echo "✅ 备份完成"
echo ""

# 执行批量修改
echo "开始批量修改提交记录..."
echo "这可能需要一些时间，请耐心等待..."
echo ""

git filter-branch -f --env-filter "
if [ \"\$GIT_COMMITTER_EMAIL\" = \"$OLD_EMAIL\" ]
then
    export GIT_COMMITTER_NAME=\"$CORRECT_NAME\"
    export GIT_COMMITTER_EMAIL=\"$CORRECT_EMAIL\"
fi
if [ \"\$GIT_AUTHOR_EMAIL\" = \"$OLD_EMAIL\" ]
then
    export GIT_AUTHOR_NAME=\"$CORRECT_NAME\"
    export GIT_AUTHOR_EMAIL=\"$CORRECT_EMAIL\"
fi
" --tag-name-filter cat -- --branches --tags

if [ $? -eq 0 ]; then
    echo ""
    echo "✅ 修改完成！"
    echo ""
    echo "验证结果："
    REMAINING=$(git log --format='%H' --author="$OLD_EMAIL" | wc -l)
    if [ "$REMAINING" -eq 0 ]; then
        echo "✅ 所有提交的邮箱地址已成功修改"
    else
        echo "⚠️  仍有 $REMAINING 个提交使用旧邮箱"
    fi
    echo ""
    echo "下一步："
    echo "  1. 检查修改结果：git log --format='%an <%ae>' | head -10"
    echo "  2. 推送到 Gerrit：git push gerrit HEAD:refs/for/master"
    echo ""
    echo "如果需要恢复，可以使用："
    echo "  git reset --hard $BACKUP_BRANCH"
else
    echo ""
    echo "❌ 修改失败"
    echo "可以恢复备份：git reset --hard $BACKUP_BRANCH"
    exit 1
fi