import bcrypt from 'bcrypt'
import { z } from 'zod'
import { createError, getRequestIP, readBody } from 'h3'
import { getUserByEmail, touchUserActivity } from '../../repositories/member-repository'
import { setMemberSession } from '../../utils/member-auth'

const loginSchema = z.object({
  email: z.string().trim().email(),
  password: z.string().min(1)
})

/**
 * 회원 로그인 API
 * @param {import('h3').H3Event} event - 요청 이벤트
 * @returns {Promise<{ id: string, username: string, email: string }>} 회원 정보
 */
export default defineEventHandler(async (event) => {
  const parsedBody = loginSchema.safeParse(await readBody(event))

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

  const body = parsedBody.data
  const user = await getUserByEmail(body.email)

  if (!user || !(await bcrypt.compare(body.password, user.passwordHash))) {
    throw createError({
      statusCode: 401,
      message: '이메일 또는 비밀번호가 올바르지 않습니다.'
    })
  }

  setMemberSession(event, { userId: user.id, email: user.email })
  await touchUserActivity({
    userId: user.id,
    ip: String(getRequestIP(event) || '')
  })

  return {
    id: user.id,
    username: user.username,
    email: user.email,
    avatarUrl: user.avatarUrl || ''
  }
})