import { create } from 'zustand'

export type NotificationType = 'info' | 'warning' | 'success' | 'error'

export interface Notification {
  id: string
  tag?: string
  message: string
  type: NotificationType
  durationMs?: number
}

interface NotificationState {
  notifications: Notification[]
  timers: Record<string, ReturnType<typeof setTimeout>>
  add: (msg: string, type?: NotificationType, durationMs?: number, tag?: string) => void
  remove: (id: string) => void
}

export const useNotificationStore = create<NotificationState>((set, get) => ({
  notifications: [],
  timers: {},

  add(msg, type = 'info', durationMs = 5000, tag) {
    const { timers } = get()

    // Se tem tag, remove a notificação anterior com a mesma tag (sem animação de saída)
    // e cancela o timer dela, para não empilhar
    if (tag) {
      const existing = get().notifications.find((n) => n.tag === tag)
      if (existing) {
        if (timers[existing.id]) {
          clearTimeout(timers[existing.id])
          set((s) => {
            const { [existing.id]: _, ...rest } = s.timers
            return { timers: rest }
          })
        }
        set((s) => ({ notifications: s.notifications.filter((n) => n.tag !== tag) }))
      }
    }

    const id = tag ?? `${Date.now()}-${Math.random().toString(36).slice(2, 7)}`
    set((s) => ({ notifications: [...s.notifications, { id, tag, message: msg, type, durationMs }] }))

    if (durationMs > 0) {
      const timer = setTimeout(() => {
        set((s) => ({
          notifications: s.notifications.filter((n) => n.id !== id),
          timers: Object.fromEntries(Object.entries(s.timers).filter(([k]) => k !== id)),
        }))
      }, durationMs)
      set((s) => ({ timers: { ...s.timers, [id]: timer } }))
    }
  },

  remove(id) {
    const { timers } = get()
    if (timers[id]) {
      clearTimeout(timers[id])
      set((s) => {
        const { [id]: _, ...rest } = s.timers
        return { timers: rest }
      })
    }
    set((s) => ({ notifications: s.notifications.filter((n) => n.id !== id) }))
  },
}))

/** Atalho para usar fora de componentes React (stores, services, etc.) */
export const notify = (msg: string, type?: NotificationType, durationMs?: number, tag?: string) =>
  useNotificationStore.getState().add(msg, type, durationMs, tag)