import { requireAuth } from '~/server/utils/auth'
import { prisma } from '~/server/utils/prisma'

export default defineEventHandler(async (event) => {
  const user = requireAuth(event)
  const body = await readBody(event)
  const { canvasId, title, priority, state } = body

  if (!canvasId || !title) {
    throw createError({ statusCode: 400, message: 'Canvas ID and Title are required' })
  }

  // 1. Получаем канвас
  const canvas = await prisma.canvas.findUnique({
    where: { id: canvasId }
  })

  if (!canvas) {
    throw createError({ statusCode: 404, message: 'Canvas not found' })
  }

  // 2. Проверяем права
  const isOwner = canvas.ownerId === user.id
  let isMember = false
  if (canvas.groupId) {
    const membership = await prisma.groupMember.findFirst({
      where: { userId: user.id, groupId: canvas.groupId }
    })
    isMember = !!membership
  }

  if (!isOwner && !isMember && user.role !== 'admin') {
    throw createError({ statusCode: 403, message: 'No permission to add tasks to this canvas' })
  }

  // 3. Создаем новый узел задачи
  const nodes = (canvas.nodes as any[]) || []
  
  // Генерируем позицию (просто в центре или скраю)
  const lastNode = nodes[nodes.length - 1]
  const x = lastNode?.position?.x || 100
  const y = (lastNode?.position?.y || 100) + 100

  const newTaskNode = {
    id: `task-${Date.now()}`,
    type: 'task',
    position: { x, y },
    data: {
      text: `# ${title}`,
      priority: priority || 'medium',
      state: state || 'todo',
      createdAt: new Date().toISOString()
    },
    // Дублируем поля для удобства фильтрации на бэкенде
    priority: priority || 'medium',
    state: state || 'todo',
    label: title
  }

  nodes.push(newTaskNode)

  // 4. Сохраняем в БД
  await prisma.canvas.update({
    where: { id: canvasId },
    data: { nodes }
  })

  return { success: true, task: newTaskNode }
})