/**
 * Global state management with Zustand
 */
import { create } from 'zustand'
import { api } from './api'

interface User {
  id: number
  email: string
  name: string | null
  is_admin?: boolean
  is_verified?: boolean
}

interface Domain {
  id: number
  name: string
  status: string
  is_available: boolean
  registrar: string | null
  expiration_date: string | null
  deletion_date?: string | null
  notify_on_available: boolean
  created_at: string
  last_checked: string | null
  status_checked_at?: string | null
  status_source?: string | null
}

interface Subscription {
  tier: string
  tier_name?: string
  status?: string
  domain_limit: number
  domains_used: number
  portfolio_limit?: number
  check_frequency?: string
  history_days?: number
  features?: {
    email_alerts: boolean
    priority_alerts: boolean
    full_whois: boolean
    expiration_tracking: boolean
    domain_valuation: boolean
    market_insights: boolean
    api_access: boolean
    webhooks: boolean
    bulk_tools: boolean
    seo_metrics: boolean
  }
}

interface AppState {
  // Auth
  user: User | null
  isAuthenticated: boolean
  isLoading: boolean
  
  // Domains
  domains: Domain[]
  domainsTotal: number
  domainsPage: number
  
  // Subscription
  subscription: Subscription | null
  
  // Actions
  login: (email: string, password: string) => Promise<void>
  register: (email: string, password: string, name?: string, ref?: string) => Promise<void>
  logout: () => void
  checkAuth: () => Promise<void>
  
  fetchDomains: (page?: number) => Promise<void>
  addDomain: (name: string) => Promise<void>
  deleteDomain: (id: number) => Promise<void>
  refreshDomain: (id: number) => Promise<void>
  updateDomain: (id: number, updates: Partial<Domain>) => void
  
  fetchSubscription: () => Promise<void>
}

export const useStore = create<AppState>((set, get) => ({
  // Initial state
  user: null,
  isAuthenticated: false,
  isLoading: true,
  domains: [],
  domainsTotal: 0,
  domainsPage: 1,
  subscription: null,
  
  // Auth actions
  login: async (email, password) => {
    await api.login(email, password)
    const user = await api.getMe()
    set({ user, isAuthenticated: true, isLoading: false })
    
    // Fetch user data (only once after login)
    await Promise.all([
      get().fetchDomains(),
      get().fetchSubscription()
    ])
  },
  
  register: async (email, password, name, ref) => {
    await api.register(email, password, name, ref)
    // Note: No auto-login after registration
    // User should verify email first (verification email is sent)
    // They can then log in manually via the login page
  },
  
  logout: async () => {
    try {
      // Call backend to clear HttpOnly cookie
      await api.logout()
    } catch {
      // Continue with client-side cleanup even if backend call fails
    }
    
    // Clear all client-side state
    set({
      user: null,
      isAuthenticated: false,
      domains: [],
      subscription: null,
      isLoading: false,
    })
    
    // Clear ALL client-side storage
    if (typeof window !== 'undefined') {
      // Clear localStorage
      try {
        localStorage.clear()
      } catch { /* ignore */ }
      
      // Clear sessionStorage
      try {
        sessionStorage.clear()
      } catch { /* ignore */ }
      
      // Clear any cookies we can access from JS (non-HttpOnly)
      document.cookie.split(';').forEach(cookie => {
        const name = cookie.split('=')[0].trim()
        if (name) {
          document.cookie = `${name}=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/`
          document.cookie = `${name}=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/; domain=.pounce.ch`
        }
      })
      
      // Force redirect to landing page with cache-busting
      window.location.href = '/?logout=' + Date.now()
    }
  },
  
  checkAuth: async () => {
    // Skip if already authenticated and have data (prevents redundant fetches)
    const state = get()
    if (state.isAuthenticated && state.user && state.subscription) {
      set({ isLoading: false })
      return
    }
    
    set({ isLoading: true })
    try {
      // Cookie-based auth: if cookie is present and valid, /auth/me succeeds.
        const user = await api.getMe()
        set({ user, isAuthenticated: true })
        
        // Fetch in parallel for speed
        await Promise.all([
          get().fetchDomains(),
          get().fetchSubscription()
        ])
    } catch {
      set({ user: null, isAuthenticated: false })
    } finally {
      set({ isLoading: false })
    }
  },
  
  // Domain actions
  fetchDomains: async (page = 1) => {
    try {
      const response = await api.getDomains(page)
      set({
        domains: response.domains,
        domainsTotal: response.total,
        domainsPage: response.page,
      })
    } catch (error) {
      console.error('Failed to fetch domains:', error)
    }
  },
  
  addDomain: async (name) => {
    await api.addDomain(name)
    await get().fetchDomains(get().domainsPage)
    await get().fetchSubscription()
  },
  
  deleteDomain: async (id) => {
    await api.deleteDomain(id)
    await get().fetchDomains(get().domainsPage)
    await get().fetchSubscription()
  },
  
  refreshDomain: async (id) => {
    const updated = await api.refreshDomain(id)
    const domains = get().domains.map((d) =>
      d.id === id ? { ...d, ...updated } : d
    )
    set({ domains })
  },
  
  updateDomain: (id, updates) => {
    const domains = get().domains.map((d) =>
      d.id === id ? { ...d, ...updates } : d
    )
    set({ domains })
  },
  
  // Subscription actions
  fetchSubscription: async () => {
    try {
      const sub = await api.getSubscription()
      set({
        subscription: {
          tier: sub.tier,
          tier_name: sub.tier_name,
          domain_limit: sub.domain_limit,
          domains_used: sub.domains_used,
          portfolio_limit: sub.portfolio_limit,
          check_frequency: sub.check_frequency,
          history_days: sub.history_days,
          features: sub.features,
        },
      })
    } catch {
      // User might not have subscription
    }
  },
}))