import { ref } from 'vue'
import { currentUser as apiCurrentUser, loginWithPassword as apiLoginWithPassword, logout as apiLogout, createAccount as apiCreateAccount } from '@/api/auth'
import { api } from '@/api/client'
import type { User } from '@/domain/types'

type Household = { id: number; name: string; slug: string }

const user = ref<User | null>(null)
const households = ref<Household[]>([])
const activeHousehold = ref<Household | null>(null)
let initialized = false

export async function loadUser() {
  if (!initialized) {
    user.value = await apiCurrentUser()
    initialized = true
  }
  return user.value
}

// Legacy username login removed; use loginWithPassword instead.

export async function loginWithPassword(email: string, password: string) {
  user.value = await apiLoginWithPassword(email, password)
  return user.value
}

export async function logout() {
  await apiLogout()
  user.value = null
  households.value = []
  activeHousehold.value = null
}

export function setHouseholds(hs: Household[]) {
  households.value = Array.isArray(hs) ? hs.slice() : []
}

export function setActiveHousehold(h: Household | string | null) {
  if (h == null) {
    activeHousehold.value = null
    return
  }
  if (typeof h === 'string') {
    activeHousehold.value = households.value.find((x) => x.slug === h) ?? null
  } else {
    activeHousehold.value = h
  }
}

export function useAuth() {
  async function fetchHouseholds(): Promise<Household[]> {
    const res = await api.GET('/api/v1/users/me/households', { params: {} })
    const list = Array.isArray(res.data) ? res.data : []
    const hs: Household[] = list.map((h) => ({ id: h.id, name: h.name, slug: h.slug }))
    setHouseholds(hs)
    return hs
  }

  async function createHousehold(name: string): Promise<Household> {
    const res = await api.POST('/api/v1/households', { body: { name } })
    if (!res.response.ok || !res.data) throw new Error('Failed to create household')
    const h: Household = { id: res.data.id, name: res.data.name, slug: res.data.slug }
    // Update local state: append and set active
    setHouseholds([...households.value, h])
    setActiveHousehold(h)
    return h
  }

  async function createAccount(email: string, displayName: string, password: string) {
    const u = await apiCreateAccount(email, displayName, password)
    user.value = u
    return u
  }

  return { user, households, activeHousehold, loadUser, loginWithPassword, logout, setHouseholds, setActiveHousehold, fetchHouseholds, createHousehold, createAccount }
}