import React, { useEffect, useState, useCallback } from 'react';
import AccountNav from '../accounts/AccountNav';
import Cards from './Cards';
import StartSection from './StartSection';
import api from '../../config/api';
import { FiFileText, FiClock, FiAlertTriangle, FiCheckCircle } from "react-icons/fi";
import { useSelector } from 'react-redux';
import { RootState } from '../../store/store';

interface CardData {
    title: string;
    count: number;
    icon: JSX.Element;
    gradient: string;
    shadowColor: string;
    iconBg: string;
    textColor: string;
    percentage?: number;
    trend?: 'up' | 'down' | 'stable';
}

const Home = () => {
    const mapApiDataToCards = (data: any): CardData[] => {
        return [
            {
                title: "Action Required",
                count: data.actionNeeded || 0,
                icon: <FiFileText className="w-5 h-5 text-sky-500" />,
                iconBg: "bg-sky-100 border-sky-200",
                textColor: "text-sky-600",
                gradient: "bg-white",
                shadowColor: "shadow-sky-100",
            },
            {
                title: "Waiting for Response",
                count: data.waitingForOthers || 0,
                icon: <FiClock className="w-5 h-5 text-yellow-500" />,
                iconBg: "bg-yellow-100 border-yellow-200",
                textColor: "text-yellow-600",
                gradient: "bg-white",
                shadowColor: "shadow-yellow-100",
            },
            {
                title: "Expiring Soon",
                count: data.expiring || 0,
                icon: <FiAlertTriangle className="w-5 h-5 text-red-500" />,
                iconBg: "bg-red-100 border-red-200",
                textColor: "text-red-600",
                gradient: "bg-white",
                shadowColor: "shadow-red-100",
            },
            {
                title: "Completed",
                count: data.completed || 0,
                icon: <FiCheckCircle className="w-5 h-5 text-green-500" />,
                iconBg: "bg-green-100 border-green-200",
                textColor: "text-green-600",
                gradient: "bg-white",
                shadowColor: "shadow-green-100",
            },
        ];
    };

    const [activeAccountId, setActiveAccountId] = useState<string | null>(
        JSON.parse(sessionStorage.getItem('activeAccountId') || 'null')
    );
    const [dashboardData, setDashboardData] = useState<any>(null);
    const [fromDate, setFromDate] = useState<string>('');
    const [toDate, setToDate] = useState<string>('');
    const [cards, setCards] = useState<CardData[]>([]);
    const [isLoading, setIsLoading] = useState<boolean>(false);

    const userData = useSelector((state: RootState) => state.user);

    console.log("activeAccountId", activeAccountId);
    console.log("cards", cards);

    const getDashboardData = async () => {
        if (!activeAccountId) return;

        setIsLoading(true);
        const payload = {
            account: activeAccountId
        };

        try {
            const res = await api.get(`/api/accounts/${userData.account.id}/dashboard`, { params: payload });
            setDashboardData(res.data);
            console.log("Dashboard Data:", res.data);
            const cardDataArray = mapApiDataToCards(res.data);
            setCards(cardDataArray);
        } catch (error) {
            console.error("Error fetching dashboard data:", error);
        } finally {
            setIsLoading(false);
        }
    };

    const handleDateRangeChange = useCallback(async (range: { from: string; to: string }) => {
        const isoFrom = new Date(range.from).toISOString();
        const isoTo = new Date(range.to).toISOString();
        setFromDate(isoFrom);
        setToDate(isoTo);
    }, []);

    // Listen for sessionStorage changes
    useEffect(() => {
        const handleStorageChange = (e: StorageEvent) => {
            if (e.key === 'activeAccountId') {
                const newActiveAccountId = e.newValue ? JSON.parse(e.newValue) : null;
                setActiveAccountId(newActiveAccountId);
            }
        };

        // Listen for storage events (works for changes from other tabs)
        window.addEventListener('storage', handleStorageChange);

        // Custom event listener for same-tab changes
        const handleCustomStorageChange = (e: CustomEvent) => {
            if (e.detail.key === 'activeAccountId') {
                setActiveAccountId(e.detail.newValue);
            }
        };

        window.addEventListener('sessionStorageChange', handleCustomStorageChange as EventListener);

        return () => {
            window.removeEventListener('storage', handleStorageChange);
            window.removeEventListener('sessionStorageChange', handleCustomStorageChange as EventListener);
        };
    }, []);

    // Re-fetch dashboard data when activeAccountId changes
    useEffect(() => {
        if (activeAccountId) {
            getDashboardData();
        }
    }, [activeAccountId]);

    // Set default date range on mount (last 7 days)
    useEffect(() => {
        const now = new Date();
        const from = new Date();
        from.setDate(now.getDate() - 7);

        setFromDate(from.toISOString());
        setToDate(now.toISOString());
    }, []);

    return (
        <>
            <Cards
                onDateRangeChange={handleDateRangeChange}
                dashboardData={dashboardData}
                fromDate={fromDate}
                toDate={toDate}
                cards={cards}
                isLoading={isLoading}
            />
            <StartSection />
        </>
    );
};

export default Home;