import { requireAuth } from '~/server/utils/auth'
import { canvases } from '~/server/utils/db'

export default defineEventHandler(async (event) => {
  requireAuth(event)
  const id = getRouterParam(event, 'id')
  const body = await readBody(event)

  const existing = canvases.get(id || '')
  if (!existing) {
    throw createError({ statusCode: 404, message: 'Canvas not found' })
  }

  const updated = {
    ...existing,
    ...body,
    id: existing.id,
    updatedAt: new Date().toISOString()
  }

  canvases.set(id || '', updated)

  return { canvas: updated }
})