#!/bin/bash

###############################################################################
# 将 clip-as-service 从 Git 子模块转为普通目录
#
# 用途：
#   移除 Git 子模块配置，将 clip-as-service 直接纳入主项目管理
#
# 使用方法：
#   ./scripts/remove_clip_submodule.sh
#
# 注意：
#   - 此操作会修改 Git 配置，请确保已提交当前更改
#   - 建议先创建备份分支
#   - 执行前请先阅读 docs/GIT_SUBMODULE_GUIDE.md
#
###############################################################################

set -e  # 遇到错误立即退出

# 颜色定义
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m' # No Color

# 项目路径
PROJECT_ROOT="/data/tw/SearchEngine"

echo -e "${BLUE}========================================${NC}"
echo -e "${BLUE}将 clip-as-service 从子模块转为普通目录${NC}"
echo -e "${BLUE}========================================${NC}"
echo ""

# 检查是否在项目根目录
if [ ! -f "${PROJECT_ROOT}/.git" ] && [ ! -d "${PROJECT_ROOT}/.git" ]; then
    echo -e "${RED}错误: 当前目录不是 Git 仓库根目录${NC}"
    echo -e "${YELLOW}请在项目根目录运行此脚本${NC}"
    exit 1
fi

cd "${PROJECT_ROOT}"

# 检查是否有未提交的更改
if [ -n "$(git status --porcelain)" ]; then
    echo -e "${RED}错误: Git 工作区有未提交的更改${NC}"
    echo -e "${YELLOW}请先提交或暂存所有更改${NC}"
    echo ""
    echo "未提交的文件:"
    git status --short
    echo ""
    echo -e "${YELLOW}建议操作:${NC}"
    echo "  1. 提交更改: git add . && git commit -m '保存点'"
    echo "  2. 或创建备份分支: git branch backup-before-submodule-removal"
    exit 1
fi

# 确认操作
echo -e "${YELLOW}此操作将会:${NC}"
echo "  1. 移除 clip-as-service 的子模块配置"
echo "  2. 将其作为普通目录纳入 Git 管理"
echo "  3. 更新 .gitmodules 文件"
echo ""
echo -e "${YELLOW}请确保已阅读: docs/GIT_SUBMODULE_GUIDE.md${NC}"
echo ""
read -p "$(echo -e ${YELLOW}是否继续? [y/N]: ${NC})" -n 1 -r
echo
if [[ ! $REPLY =~ ^[Yy]$ ]]; then
    echo -e "${YELLOW}已取消操作${NC}"
    exit 0
fi

# 创建备份分支
BACKUP_BRANCH="backup-before-submodule-removal-$(date +%Y%m%d-%H%M%S)"
echo -e "${BLUE}创建备份分支: ${BACKUP_BRANCH}${NC}"
git branch "${BACKUP_BRANCH}"
echo -e "${GREEN}✓ 备份分支已创建${NC}"
echo ""

# 步骤 1: 备份 .gitmodules
echo -e "${BLUE}步骤 1: 备份配置文件...${NC}"
if [ -f ".gitmodules" ]; then
    cp .gitmodules .gitmodules.backup
    echo -e "${GREEN}✓ 已备份 .gitmodules → .gitmodules.backup${NC}"
fi

# 步骤 2: 移除子模块追踪
echo -e "${BLUE}步骤 2: 移除子模块追踪...${NC}"
if git ls-files --stage | grep -q "160000.*third-party/clip-as-service"; then
    git rm --cached third-party/clip-as-service
    echo -e "${GREEN}✓ 已移除子模块缓存${NC}"
else
    echo -e "${YELLOW}⚠ 子模块未在 Git 索引中，跳过此步骤${NC}"
fi

# 步骤 3: 清理 .gitmodules
echo -e "${BLUE}步骤 3: 清理 .gitmodules...${NC}"
if [ -f ".gitmodules" ]; then
    # 删除 clip-as-service 相关的配置块
    # 从 [submodule "third-party/clip-as-service"] 到下一个空行或文件末尾
    sed -i '/\[submodule "third-party\/clip-as-service"\]/,/\s*$/d' .gitmodules

    # 如果文件为空或只包含空行，删除它
    if [ ! -s ".gitmodules" ] || [ $(wc -l < .gitmodules) -eq 0 ]; then
        rm .gitmodules
        echo -e "${GREEN}✓ 已删除空的 .gitmodules 文件${NC}"
    else
        echo -e "${GREEN}✓ 已更新 .gitmodules${NC}"
    fi
else
    echo -e "${YELLOW}⚠ .gitmodules 文件不存在，跳过此步骤${NC}"
fi

# 步骤 4: 删除子模块的 Git 仓库
echo -e "${BLUE}步骤 4: 删除子模块 Git 仓库...${NC}"
if [ -d "third-party/clip-as-service/.git" ]; then
    rm -rf third-party/clip-as-service/.git
    echo -e "${GREEN}✓ 已删除子模块 Git 仓库${NC}"
else
    echo -e "${YELLOW}⚠ 子模块 Git 仓库不存在，跳过此步骤${NC}"
fi

# 步骤 5: 清理 Git 模块缓存
echo -e "${BLUE}步骤 5: 清理 Git 模块缓存...${NC}"
if [ -d ".git/modules/third-party/clip-as-service" ]; then
    rm -rf .git/modules/third-party/clip-as-service
    echo -e "${GREEN}✓ 已清理 Git 模块缓存${NC}"
else
    echo -e "${YELLOW}⚠ Git 模块缓存不存在，跳过此步骤${NC}"
fi

# 步骤 6: 将目录作为普通文件添加
echo -e "${BLUE}步骤 6: 将目录添加到 Git...${NC}"
git add third-party/clip-as-service/
if [ -f ".gitmodules" ]; then
    git add .gitmodules
fi
echo -e "${GREEN}✓ 已添加到 Git${NC}"

# 显示状态
echo ""
echo -e "${BLUE}========================================${NC}"
echo -e "${BLUE}操作完成！当前状态：${NC}"
echo -e "${BLUE}========================================${NC}"
echo ""
git status
echo ""

# 统计信息
echo -e "${BLUE}统计信息:${NC}"
FILE_COUNT=$(find third-party/clip-as-service -type f | wc -l)
DIR_SIZE=$(du -sh third-party/clip-as-service | cut -f1)
echo "  文件数量: ${FILE_COUNT}"
echo "  目录大小: ${DIR_SIZE}"
echo ""

# 下一步提示
echo -e "${GREEN}========================================${NC}"
echo -e "${GREEN}✓ 子模块转换完成！${NC}"
echo -e "${GREEN}========================================${NC}"
echo ""
echo -e "${BLUE}下一步操作:${NC}"
echo ""
echo "1. 查看将要提交的更改:"
echo "   git diff --cached --stat"
echo ""
echo "2. 提交更改:"
echo "   git commit -m 'feat: 将 clip-as-service 从子模块转为普通目录'"
echo ""
echo "3. 推送到远程:"
echo "   git push origin main"
echo ""
echo -e "${BLUE}注意事项:${NC}"
echo "  - 备份分支: ${BACKUP_BRANCH}"
echo "  - 如需回退: git reset --hard ${BACKUP_BRANCH}"
echo "  - 配置备份: .gitmodules.backup"
echo ""
echo -e "${BLUE}验证转换:${NC}"
echo "  cd third-party/clip-as-service"
echo "  git status  # 应该显示 'not a git repository'"
echo ""

# 提示查看详细文档
echo -e "${YELLOW}📖 详细文档: docs/GIT_SUBMODULE_GUIDE.md${NC}"
echo ""

# 询问是否立即提交
read -p "$(echo -e ${YELLOW}是否立即提交更改? [Y/n]: ${NC})" -n 1 -r
echo
if [[ $REPLY =~ ^[Yy]$ ]] || [ -z "$REPLY" ]; then
    echo -e "${BLUE}正在提交更改...${NC}"
    git commit -m "feat: 将 clip-as-service 从子模块转为普通目录

- 移除子模块配置，改为普通目录
- 便于自定义配置和管理
- 备份分支: ${BACKUP_BRANCH}
"
    echo -e "${GREEN}✓ 已提交${NC}"
    echo ""
    echo -e "${YELLOW}现在可以推送到远程仓库:${NC}"
    echo "  git push origin main"
else
    echo -e "${YELLOW}跳过提交${NC}"
    echo -e "${YELLOW}你可以稍后手动提交:${NC}"
    echo "  git commit -m 'feat: 将 clip-as-service 从子模块转为普通目录'"
fi

echo ""
echo -e "${GREEN}所有操作完成！${NC}"