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

export default defineEventHandler(async (event) => {
  const user = requireAuth(event)

  // Get all canvases the user can access
  const userGroupIds = Array.from(userGroups.values())
    .filter(membership => membership.userId === user.id)
    .map(membership => membership.groupId)

  const accessibleCanvases = Array.from(canvases.values()).filter(canvas => {
    // User can see their own canvases
    if (canvas.ownerId === user.id) return true
    // User can see public canvases
    if (canvas.isPublic) return true
    // User can see group canvases they're a member of
    if (canvas.groupId && userGroupIds.includes(canvas.groupId)) return true
    return false
  })

  const canvasList = accessibleCanvases.map(canvas => ({
    id: canvas.id,
    name: canvas.name,
    ownerId: canvas.ownerId,
    createdAt: canvas.createdAt,
    updatedAt: canvas.updatedAt,
    isPublic: canvas.isPublic,
    groupId: canvas.groupId,
    nodeCount: canvas.nodes.length
  }))

  return { canvases: canvasList }
})