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

export default defineEventHandler(async (event) => {
  const currentUser = requireAuth(event)
  const targetUserIdOrUsername = getRouterParam(event, 'id')

  if (!targetUserIdOrUsername) {
    throw createError({ statusCode: 400, message: 'User ID is required' })
  }

  // Находим целевого пользователя (по ID или username)
  const targetUser = await prisma.user.findFirst({
    where: {
      OR: [
        { id: targetUserIdOrUsername },
        { username: targetUserIdOrUsername }
      ]
    }
  })

  if (!targetUser) {
    throw createError({ statusCode: 404, message: 'Target user not found' })
  }

  try {
    const follow = await prisma.follows.findUnique({
      where: {
        followerId_followingId: {
          followerId: currentUser.id,
          followingId: targetUser.id
        }
      }
    })
    return { isFollowing: !!follow }
  } catch (e) {
    return { isFollowing: false }
  }
})