import { OAuthToken, OrganizationResource, PersonResource } from '../types'

export type ENV = 'production' | 'staging' | 'development'
export type OauthType = 'OAuth' | 'ChurchCenterOauth'
export type PartialToken = Pick<OAuthToken, 'access_token'> & Partial<OAuthToken>
export type SessionMeta = {
  [key: string]: {
    person: PersonResource
    organization: OrganizationResource
  }
}
export type SessionProps<T extends PartialToken> = {
  env?: ENV
  token?: T
  type?: OauthType
  meta?: SessionMeta
}

export const UNAUTHENTICATED_SESSION_ID = 'unauthenticated' as const
type SessionId = string | typeof UNAUTHENTICATED_SESSION_ID

/**
 * Session class to track the environment and token
 * Not intended to make network requests or handle authentication
 */
export class Session<T extends PartialToken = PartialToken> {
  env: ENV
  token: T | undefined
  type: OauthType
  meta: Record<string, any>

  constructor(props?: SessionProps<T>) {
    const { env = 'production', token, type, meta } = props || {}
    this.env = env
    this.token = token
    this.type = type || 'OAuth'
    this.meta = meta || {}
  }

  get isAuthenticated() {
    return Boolean(this.token?.access_token)
  }

  get isChurchCenterToken() {
    return this.type === 'ChurchCenterOauth'
  }

  get id(): SessionId {
    if (!this.isAuthenticated || !this.token?.access_token) {
      return UNAUTHENTICATED_SESSION_ID
    }
    const tokenStr = this.token.access_token
    return tokenStr.slice(-8)
  }

  toString() {
    return JSON.stringify({ env: this.env, token: this.token, meta: this.meta })
  }

  // Convenience methods to set the person and organization
  setPerson(person: PersonResource) {
    this.meta.person = person
  }

  setOrganization(organization: OrganizationResource) {
    this.meta.organization = organization
  }

  static hydrate<T extends PartialToken>(sessionString: string) {
    try {
      const props = JSON.parse(sessionString)
      return new Session<T>(props)
    } catch (_error) {
      return new Session<T>()
    }
  }
}