/**
 * 删除用户脚本
 * 
 * 功能：根据用户名或真实姓名删除用户账号
 * 
 * 使用方法：
 *   npx tsx scripts/delete-user.ts <username|realName>
 * 
 * 示例：
 *   npx tsx scripts/delete-user.ts 玄女
 */

import { PrismaClient } from '@prisma/client';

const prisma = new PrismaClient();

async function deleteUser(searchTerm: string) {
  try {
    console.log(`🔍 正在查找用户: "${searchTerm}"...\n`);

    // 使用原始SQL查询，避免字段不匹配问题
    const users = await prisma.$queryRaw<Array<{
      id: string;
      username: string;
      email: string;
      department: string;
      role: string;
      isactive: boolean;
      realname?: string;
      issuperadmin?: boolean;
    }>>`
      SELECT id, username, email, department, role, "isActive" as isactive, "realName" as realname, "isSuperAdmin" as issuperadmin
      FROM users
      WHERE username = ${searchTerm} OR "realName" = ${searchTerm}
      LIMIT 1
    `;

    if (users.length === 0) {
      console.log(`❌ 未找到用户: "${searchTerm}"`);
      return;
    }

    const user = users[0];

    if (!user) {
      console.log(`❌ 未找到用户: "${searchTerm}"`);
      return;
    }

    // 查询关联数据统计
    const stats = await prisma.$queryRaw<Array<{
      material_count: bigint;
      like_count: bigint;
      favorite_count: bigint;
      download_log_count: bigint;
    }>>`
      SELECT 
        (SELECT COUNT(*) FROM materials WHERE "userId" = ${user.id} AND "deletedAt" IS NULL) as material_count,
        (SELECT COUNT(*) FROM material_likes WHERE "userId" = ${user.id}) as like_count,
        (SELECT COUNT(*) FROM material_favorites WHERE "userId" = ${user.id}) as favorite_count,
        (SELECT COUNT(*) FROM material_download_logs WHERE "userId" = ${user.id}) as download_log_count
    `;

    const materialCount = Number(stats[0]?.material_count || 0);
    const likeCount = Number(stats[0]?.like_count || 0);
    const favoriteCount = Number(stats[0]?.favorite_count || 0);
    const downloadLogCount = Number(stats[0]?.download_log_count || 0);

    // 显示用户信息
    console.log('📋 找到用户信息:');
    console.log(`   ID: ${user.id}`);
    console.log(`   用户名: ${user.username}`);
    console.log(`   真实姓名: ${user.realname || '(未设置)'}`);
    console.log(`   邮箱: ${user.email}`);
    console.log(`   部门: ${user.department || '(未设置)'}`);
    console.log(`   角色: ${user.role}`);
    console.log(`   是否激活: ${user.isactive ? '是' : '否'}`);
    if (user.issuperadmin !== undefined) {
      console.log(`   是否超级管理员: ${user.issuperadmin ? '是' : '否'}`);
    }
    console.log(`\n📊 关联数据统计:`);
    console.log(`   素材数: ${materialCount}`);
    console.log(`   点赞数: ${likeCount}`);
    console.log(`   收藏数: ${favoriteCount}`);
    console.log(`   下载日志数: ${downloadLogCount}`);

    // 警告信息
    if (materialCount > 0) {
      console.log(`\n⚠️  警告: 该用户有 ${materialCount} 个素材，删除用户会级联删除这些素材！`);
    }

    if (user.issuperadmin) {
      console.log(`\n⚠️  警告: 该用户是超级管理员！`);
    }

    // 执行删除
    console.log(`\n🗑️  正在删除用户...`);
    
    await prisma.$executeRaw`
      DELETE FROM users WHERE id = ${user.id}
    `;

    console.log(`✅ 用户 "${user.username}" (${user.realname || 'N/A'}) 已成功删除！`);
    
    if (materialCount > 0) {
      console.log(`   已级联删除 ${materialCount} 个素材`);
    }

  } catch (error: any) {
    console.error('❌ 删除失败:', error.message);
    
    if (error.code === 'P2003') {
      console.error('   错误: 存在外键约束，无法删除');
    } else if (error.code === 'P2025') {
      console.error('   错误: 用户不存在');
    }
    
    process.exit(1);
  } finally {
    await prisma.$disconnect();
  }
}

// 主函数
async function main() {
  const searchTerm = process.argv[2];

  if (!searchTerm) {
    console.error('❌ 错误: 请提供用户名或真实姓名');
    console.error('   使用方法: npx tsx scripts/delete-user.ts <username|realName>');
    process.exit(1);
  }

  await deleteUser(searchTerm);
}

main();