import { differenceBy, merge } from 'lodash'
import { http } from '@/services'
import { reactive } from 'vue'
import { arrayify } from '@/utils'

interface UserFormData {
  name: string
  email: string
  is_admin: boolean
}

export interface CreateUserData extends UserFormData {
  password: string
}

export interface UpdateUserData extends UserFormData {
  password?: string
}

export const userStore = {
  vault: new Map<User['id'], User>(),

  state: reactive({
    users: [] as User[],
    current: null as unknown as User
  }),

  syncWithVault (users: MaybeArray<User>) {
    return arrayify(users).map(user => {
      let local = this.byId(user.id)
      local = reactive(local ? merge(local, user) : user)
      this.vault.set(user.id, local)

      return local
    })
  },

  init (currentUser: User) {
    this.state.users = this.syncWithVault(currentUser)
    this.state.current = this.state.users[0]
  },

  async fetch () {
    this.state.users = this.syncWithVault(await http.get<User[]>('users'))
  },

  byId (id: User['id']) {
    return this.vault.get(id)
  },

  get current () {
    return this.state.current
  },

  async store (data: CreateUserData) {
    const user = await http.post<User>('users', data)
    this.add(user)
    return this.byId(user.id)
  },

  add (user: MaybeArray<User>) {
    this.state.users.push(...this.syncWithVault(user))
  },

  async update (user: User, data: UpdateUserData) {
    this.syncWithVault(await http.put<User>(`users/${user.id}`, data))
  },

  async destroy (user: User) {
    await http.delete(`users/${user.id}`)
    this.remove(user)

    // Mama, just killed a man
    // Put a gun against his head
    // Pulled my trigger, now he's dead
    // Mama, life had just begun
    // But now I've gone and thrown it all away
    // Mama, oooh
    // Didn't mean to make you cry
    // If I'm not back again this time tomorrow
    // Carry on, carry on, as if nothing really matters
    //
    // Too late, my time has come
    // Sends shivers down my spine
    // Body's aching all the time
    // Goodbye everybody - I've got to go
    // Gotta leave you all behind and face the truth
    // Mama, oooh
    // I don't want to die
    // I sometimes wish I'd never been born at all
  },

  remove (user: User) {
    this.state.users = differenceBy(this.state.users, [user], 'id')
    this.vault.delete(user.id)
  }
}