import User from '#models/user'
import db from '@adonisjs/lucid/services/db'
import { signupValidator } from '#validators/user'
import type { HttpContext } from '@adonisjs/core/http'
import UserTransformer from '#transformers/user_transformer'
import AccessService from '#services/access_service'

class InviteGone extends Error {}

export default class NewAccountController {
  async store({ request, response, serialize }: HttpContext) {
    const { fullName, email, password, invite } = await request.validateUsing(signupValidator)
    if (AccessService.signup === 'closed') return response.forbidden({ error: 'Signup is closed' })
    if (AccessService.signup === 'invite' && !invite) return response.forbidden({ error: 'An invite code is needed to sign up' })

    // The user and their invite together: an invite that's gone rolls the signup back.
    const user = await db
      .transaction(async (trx) => {
        const created = await User.create({ fullName, email, password }, { client: trx })
        if (AccessService.signup !== 'invite') return created
        const gives = await AccessService.redeem(invite!, created.id, trx)
        if (!gives) throw new InviteGone()
        if (gives.tier) {
          AccessService.grantTier(created, gives.tier, gives.tier_days)
          await created.useTransaction(trx).save()
        }
        return created
      })
      .catch((error) => {
        if (error instanceof InviteGone) return null
        throw error
      })
    if (!user) return response.forbidden({ error: 'Unknown or used invite code' })
    const token = await User.accessTokens.create(user)

    return serialize({
      user: UserTransformer.transform(user),
      token: token.value!.release(),
    })
  }
}