import { createError, getRouterParam, readBody } from 'h3'
import { z } from 'zod'
import { requireAdminSession } from '../../../../utils/admin-auth'
import { getMemberForAdmin, isEmailTaken, isUsernameTaken, updateMemberByAdmin } from '../../../../repositories/member-repository'

const memberInputSchema = z.object({
  username: z.string().trim().min(1).max(60),
  email: z.string().trim().email().max(254),
  avatarUrl: z.string().trim().max(500).optional().default(''),
  labels: z.array(z.string().trim().min(1).max(40)).max(20).optional().default([]),
  note: z.string().max(500).optional().default('')
})

/**
 * 관리자 회원 기본 정보 수정 API
 * @param {import('h3').H3Event} event - 요청 이벤트
 * @returns {Promise<Object>} 수정된 회원
 */
export default defineEventHandler(async (event) => {
  requireAdminSession(event)
  const memberId = String(getRouterParam(event, 'id') || '')
  const parsedBody = memberInputSchema.safeParse(await readBody(event))

  if (!memberId) {
    throw createError({
      statusCode: 400,
      message: '회원 ID가 필요합니다.'
    })
  }

  if (!parsedBody.success) {
    throw createError({
      statusCode: 400,
      message: '회원 수정 요청 형식이 올바르지 않습니다.'
    })
  }

  const existing = await getMemberForAdmin(memberId)
  if (!existing) {
    throw createError({
      statusCode: 404,
      message: '회원을 찾을 수 없습니다.'
    })
  }

  const body = parsedBody.data
  const email = body.email.toLowerCase()

  if (await isUsernameTaken({ username: body.username, excludeUserId: memberId })) {
    throw createError({
      statusCode: 409,
      message: '이미 사용 중인 이름입니다.'
    })
  }

  if (await isEmailTaken({ email, excludeUserId: memberId })) {
    throw createError({
      statusCode: 409,
      message: '이미 사용 중인 이메일입니다.'
    })
  }

  const updated = await updateMemberByAdmin({
    memberId,
    username: body.username,
    email,
    avatarUrl: body.avatarUrl,
    labels: [...new Set(body.labels)],
    note: body.note
  })

  if (!updated) {
    throw createError({
      statusCode: 500,
      message: '회원 수정에 실패했습니다.'
    })
  }

  return updated
})