import { create } from 'zustand'
import { apiFetch, setToken, clearToken, getToken } from '@/lib/api'
import { ENDPOINTS } from '@/lib/config'

interface User {
  id: string
  name: string | null
  email: string
  tier: string
}

interface AuthState {
  user: User | null
  loading: boolean
  login: (email: string, password: string) => Promise<void>
  loginWithToken: (token: string, user: User) => Promise<void>
  logout: () => Promise<void>
  restore: () => Promise<void>
}

export const useAuthStore = create<AuthState>((set) => ({
  user: null,
  loading: true,

  login: async (email, password) => {
    const res = await fetch(ENDPOINTS.login, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ email, password }),
    })
    if (!res.ok) {
      const data = await res.json().catch(() => ({}))
      throw new Error(data.error || 'Identifiants invalides')
    }
    const { token, user } = await res.json()
    await setToken(token)
    set({ user })
  },

  loginWithToken: async (token, user) => {
    await setToken(token)
    set({ user })
  },

  logout: async () => {
    await clearToken()
    set({ user: null })
  },

  restore: async () => {
    try {
      const token = await getToken()
      if (!token) { set({ loading: false }); return }
      const res = await apiFetch(ENDPOINTS.me)
      if (!res.ok) { await clearToken(); set({ loading: false, user: null }); return }
      const user = await res.json()
      set({ user, loading: false })
    } catch {
      set({ loading: false, user: null })
    }
  },
}))