import { db } from '~/drizzle/db'
import { users } from '~/drizzle/schema'
import { eq } from 'drizzle-orm'
import { getClientIP } from '~~/server/utils/ip-utils'
import { sendEmailVerificationCode } from '~~/server/api/user/email/send-code.post'

export default defineEventHandler(async (event) => {
  if (getMethod(event) !== 'POST') {
    throw createError({ statusCode: 405, message: '方法不被允许' })
  }

  const body = await readBody(event)
  const emailRaw = (body?.email || '').toString().trim().toLowerCase()
  const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/

  if (!emailRaw || !emailRegex.test(emailRaw)) {
    throw createError({ statusCode: 400, message: '请输入有效的邮箱地址' })
  }

  // 确认邮箱未被占用
  const existing = await db.select().from(users).where(eq(users.email, emailRaw)).limit(1)
  
  // 检查是否为已登录用户的修改邮箱请求
  const user = event.context.user
  if (existing.length > 0) {
    if (!user || existing[0].id !== user.id) {
      throw createError({ statusCode: 400, message: '该邮箱已被其他用户绑定' })
    }
  }

  // 获取客户端IP地址
  const clientIP = getClientIP(event)

  // 发送邮件验证码
  await sendEmailVerificationCode(user?.id || null, emailRaw, user?.name || '新用户', clientIP)

  return { success: true, message: '验证码已发送，请查收邮箱' }
})