"use client";

import { useEffect, useState, useCallback } from "react";

const STORAGE_KEY = "manoonoils-visitor";
const SESSION_DURATION_HOURS = 24;

interface VisitorState {
  visitorId: string;
  popupShown: boolean;
  popupShownAt: number | null;
  popupTrigger: "scroll" | "exit" | null;
  subscribed: boolean;
}

export function useVisitorStore() {
  const [state, setState] = useState<VisitorState>({
    visitorId: "",
    popupShown: false,
    popupShownAt: null,
    popupTrigger: null,
    subscribed: false,
  });

  useEffect(() => {
    // Check for reset flag in URL
    if (typeof window !== 'undefined' && window.location.search.includes('reset-popup=true')) {
      localStorage.removeItem(STORAGE_KEY);
      console.log("[VisitorStore] Reset popup tracking");
    }
    
    const stored = localStorage.getItem(STORAGE_KEY);
    if (stored) {
      const parsed = JSON.parse(stored);
      setState(parsed);
      console.log("[VisitorStore] Loaded state:", parsed);
    } else {
      const newState: VisitorState = {
        visitorId: generateVisitorId(),
        popupShown: false,
        popupShownAt: null,
        popupTrigger: null,
        subscribed: false,
      };
      localStorage.setItem(STORAGE_KEY, JSON.stringify(newState));
      setState(newState);
      console.log("[VisitorStore] Created new state:", newState);
    }
  }, []);

  const canShowPopup = useCallback((): boolean => {
    if (state.subscribed) {
      console.log("[VisitorStore] canShowPopup: false (already subscribed)");
      return false;
    }
    
    if (!state.popupShown || !state.popupShownAt) {
      console.log("[VisitorStore] canShowPopup: true (never shown)");
      return true;
    }
    
    const hoursPassed = (Date.now() - state.popupShownAt) / (1000 * 60 * 60);
    const canShow = hoursPassed >= SESSION_DURATION_HOURS;
    console.log("[VisitorStore] canShowPopup:", canShow, "hours passed:", hoursPassed);
    return canShow;
  }, [state.popupShown, state.popupShownAt, state.subscribed]);

  const markPopupShown = useCallback((trigger: "scroll" | "exit") => {
    const newState: VisitorState = {
      ...state,
      popupShown: true,
      popupShownAt: Date.now(),
      popupTrigger: trigger,
    };
    localStorage.setItem(STORAGE_KEY, JSON.stringify(newState));
    setState(newState);
  }, [state]);

  const markSubscribed = useCallback(() => {
    const newState: VisitorState = {
      ...state,
      subscribed: true,
    };
    localStorage.setItem(STORAGE_KEY, JSON.stringify(newState));
    setState(newState);
    console.log("[VisitorStore] Marked as subscribed");
  }, [state]);

  return {
    visitorId: state.visitorId,
    canShowPopup,
    markPopupShown,
    markSubscribed,
    popupTrigger: state.popupTrigger,
  };
}

function generateVisitorId(): string {
  return `${Date.now()}-${Math.random().toString(36).substr(2, 9)}`;
}