import { createError, getRouterParam, readBody } from 'h3'
import { requireAdminSession } from '../../../../utils/admin-auth'
import { parseAdminPostInput } from '../../../../utils/admin-post-input'
import { getSiteSettings, updateAdminPost } from '../../../../repositories/content-repository'

/**
 * 관리자 게시물 수정 API
 * @param {import('h3').H3Event} event - 요청 이벤트
 * @returns {Promise<Object>} 수정된 게시물
 */
export default defineEventHandler(async (event) => {
  const adminSession = requireAdminSession(event)

  const id = getRouterParam(event, 'id')
  const parsedBody = parseAdminPostInput(await readBody(event))

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

  const settings = await getSiteSettings()
  const postTagLimit = Number(settings.postTagLimit || 5)

  if (parsedBody.data.tags.length > postTagLimit) {
    throw createError({
      statusCode: 400,
      message: `태그는 최대 ${postTagLimit}개까지 선택할 수 있습니다.`
    })
  }

  try {
    const post = await updateAdminPost(id, parsedBody.data, adminSession.userId)

    if (!post) {
      throw createError({
        statusCode: 404,
        message: '게시물을 찾을 수 없습니다.'
      })
    }

    return post
  } catch (error) {
    if (error?.code === '23505') {
      throw createError({
        statusCode: 409,
        message: '이미 사용 중인 슬러그입니다.'
      })
    }

    throw error
  }
})