// Forked from https://github.com/nextauthjs/adapters/blob/main/packages/prisma/src/index.ts
import {
  PrismaClient,
  Prisma,
  Invitation,
  Plan,
  WorkspaceRole,
  WorkspaceInvitation,
} from 'db'
import { randomUUID } from 'crypto'
import type { Adapter, AdapterUser } from 'next-auth/adapters'
import cuid from 'cuid'
import { got } from 'got'

type InvitationWithWorkspaceId = Invitation & {
  typebot: {
    workspaceId: string | null
  }
}

export function CustomAdapter(p: PrismaClient): Adapter {
  return {
    createUser: async (data: Omit<AdapterUser, 'id'>) => {
      const user = { id: cuid(), email: data.email as string }
      const invitations = await p.invitation.findMany({
        where: { email: user.email },
        include: { typebot: { select: { workspaceId: true } } },
      })
      const workspaceInvitations = await p.workspaceInvitation.findMany({
        where: { email: user.email },
      })
      if (
        process.env.DISABLE_SIGNUP === 'true' &&
        process.env.ADMIN_EMAIL !== data.email
      )
        throw Error('New users are forbidden')
      const createdUser = await p.user.create({
        data: {
          ...data,
          id: user.id,
          apiToken: randomUUID(),
          workspaces:
            workspaceInvitations.length > 0
              ? undefined
              : {
                  create: {
                    role: WorkspaceRole.ADMIN,
                    workspace: {
                      create: {
                        name: data.name
                          ? `${data.name}'s workspace`
                          : `My workspace`,
                        plan:
                          process.env.ADMIN_EMAIL === data.email
                            ? Plan.TEAM
                            : Plan.FREE,
                      },
                    },
                  },
                },
        },
      })
      if (process.env.USER_CREATED_WEBHOOK_URL)
        await got.post(process.env.USER_CREATED_WEBHOOK_URL, {
          json: {
            email: data.email,
            name: data.name ? (data.name as string).split(' ')[0] : undefined,
          },
        })
      if (invitations.length > 0)
        await convertInvitationsToCollaborations(p, user, invitations)
      if (workspaceInvitations.length > 0)
        await joinWorkspaces(p, user, workspaceInvitations)
      return createdUser
    },
    getUser: (id) => p.user.findUnique({ where: { id } }),
    getUserByEmail: (email) => p.user.findUnique({ where: { email } }),
    async getUserByAccount(provider_providerAccountId) {
      const account = await p.account.findUnique({
        where: { provider_providerAccountId },
        select: { user: true },
      })
      return account?.user ?? null
    },
    updateUser: (data) => p.user.update({ where: { id: data.id }, data }),
    deleteUser: (id) => p.user.delete({ where: { id } }),
    linkAccount: (data) => {
      return p.account.create({
        data: {
          userId: data.userId,
          type: data.type,
          provider: data.provider,
          providerAccountId: data.providerAccountId,
          refresh_token: data.refresh_token,
          access_token: data.access_token,
          expires_at: data.expires_at,
          token_type: data.token_type,
          scope: data.scope,
          id_token: data.id_token,
          session_state: data.session_state,
          oauth_token_secret: data.oauth_token_secret as string,
          oauth_token: data.oauth_token as string,
          refresh_token_expires_in: data.refresh_token_expires_in as number,
        },
      }) as any
    },
    unlinkAccount: (provider_providerAccountId) =>
      p.account.delete({ where: { provider_providerAccountId } }) as any,
    async getSessionAndUser(sessionToken) {
      const userAndSession = await p.session.findUnique({
        where: { sessionToken },
        include: { user: true },
      })
      if (!userAndSession) return null
      const { user, ...session } = userAndSession
      return { user, session }
    },
    createSession: (data) => p.session.create({ data }),
    updateSession: (data) =>
      p.session.update({ data, where: { sessionToken: data.sessionToken } }),
    deleteSession: (sessionToken) =>
      p.session.delete({ where: { sessionToken } }),
    createVerificationToken: (data) => p.verificationToken.create({ data }),
    async useVerificationToken(identifier_token) {
      try {
        return await p.verificationToken.delete({ where: { identifier_token } })
      } catch (error) {
        if ((error as Prisma.PrismaClientKnownRequestError).code === 'P2025')
          return null
        throw error
      }
    },
  }
}

const convertInvitationsToCollaborations = async (
  p: PrismaClient,
  { id, email }: { id: string; email: string },
  invitations: InvitationWithWorkspaceId[]
) => {
  await p.collaboratorsOnTypebots.createMany({
    data: invitations.map((invitation) => ({
      typebotId: invitation.typebotId,
      type: invitation.type,
      userId: id,
    })),
  })
  const workspaceInvitations = invitations.reduce<InvitationWithWorkspaceId[]>(
    (acc, invitation) =>
      acc.some(
        (inv) => inv.typebot.workspaceId === invitation.typebot.workspaceId
      )
        ? acc
        : [...acc, invitation],
    []
  )
  for (const invitation of workspaceInvitations) {
    if (!invitation.typebot.workspaceId) continue
    await p.memberInWorkspace.upsert({
      where: {
        userId_workspaceId: {
          userId: id,
          workspaceId: invitation.typebot.workspaceId,
        },
      },
      create: {
        userId: id,
        workspaceId: invitation.typebot.workspaceId,
        role: WorkspaceRole.GUEST,
      },
      update: {},
    })
  }
  return p.invitation.deleteMany({
    where: {
      email,
    },
  })
}

const joinWorkspaces = async (
  p: PrismaClient,
  { id, email }: { id: string; email: string },
  invitations: WorkspaceInvitation[]
) => {
  await p.memberInWorkspace.createMany({
    data: invitations.map((invitation) => ({
      workspaceId: invitation.workspaceId,
      role: invitation.type,
      userId: id,
    })),
  })
  return p.workspaceInvitation.deleteMany({
    where: {
      email,
    },
  })
}