'use client'
import Link from 'next/link'
import moment from "moment";
import { useState, useEffect } from "react"
import axios from "axios";

export default function UpcomingEventData() {
    const [currentMonth, setCurrentMonth] = useState(moment());
    const [events, setEvents] = useState([]);

    useEffect(() => {
        const fetchEvents = async () => {
            try {
                const API_BASE_URL = process.env.NEXT_PUBLIC_API_BASE_URL || 'http://localhost:3006/api';
                const response = await axios.get(`${API_BASE_URL}/upcoming-events`);
                if (response.data && response.data.success) {
                    const normalizedEvents = response.data.data.map(e => ({
                        ...e,
                        title: e.title || e.eventtitle,
                        date: e.date || e.eventdate,
                        image: e.image || e.eventimageurl,
                        desc: e.description || e.eventdescription,
                        btnText: e.btn_text || e.btnText,
                        link: e.link || (e.slug ? `/upcoming-event/${e.slug}` : `/upcoming-event/${e.id}`),
                        location: e.location || e.venue,
                    }));
                    setEvents(normalizedEvents);
                }
            } catch (error) {
                console.error("Error fetching upcoming events:", error);
            }
        };
        fetchEvents();
    }, []);

    // Get start and end of current month
    const startOfMonth = currentMonth.clone().startOf("month");
    const endOfMonth = currentMonth.clone().endOf("month");

    // Generate calendar days
    const daysInMonth = [];
    for (let i = 0; i < startOfMonth.day(); i++) {
        daysInMonth.push(null);
    }
    for (let i = 1; i <= endOfMonth.date(); i++) {
        daysInMonth.push(moment(currentMonth).date(i));
    }

    // Get events for a given date
    const getEventForDate = (date) => {
        if (!date) return [];
        const dateString = date.format("YYYY-MM-DD");
        const dateStringDMY = date.format("DD/MM/YYYY");
        return events.filter(event => {
            if (!event.date) return false;
            return event.date === dateString || event.date.includes(dateString) || event.date.includes(dateStringDMY);
        });
    };

    const formatEventDate = (dateStr) => {
        if (!dateStr) return "";

        return dateStr.replace(/\d{4}-\d{2}-\d{2}/g, (date) => {
            const m = moment(date, "YYYY-MM-DD", true);
            return m.isValid() ? m.format("ddd, MMM DD, YYYY") : date;
        });
    };

    // Navigate months
    const handleMonthChange = (direction) => {
        setCurrentMonth(currentMonth.clone().add(direction, "months"));
    };

    return (
        <div className="event3-section-area sp4">
            <div className="container">
                <div className="row">
                    <div className="col-lg-6 m-auto">
                        <div className="event2-header heading5 text-center space-margin60">
                            <h2 className="text-anime-style-3">Events</h2>
                        </div>
                    </div>
                </div>
                <div className="row">
                    {/* Calendar (left side) */}
                    <div className="col-12 col-lg-3">
                        <div className="d-flex justify-content-between align-items-center">
                            <button
                                className="vl-btn4"
                                onClick={() => handleMonthChange(-1)}
                            >
                                Prev
                            </button>
                            <span className="mx-3 fw-700">
                                {currentMonth.format("MMMM YYYY")}
                            </span>
                            <button
                                className="vl-btn4"
                                onClick={() => handleMonthChange(1)}
                            >
                                Next
                            </button>
                        </div>

                        <table className="table table-bordered mt-4" style={{ tableLayout: "fixed" }}>
                            <thead>
                                <tr>
                                    {["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"].map((day, index) => (
                                        <th key={index} className="text-center">
                                            {day}
                                        </th>
                                    ))}
                                </tr>
                            </thead>
                            <tbody>
                                {Array.from({ length: Math.ceil(daysInMonth.length / 7) }, (_, rowIndex) => (
                                    <tr key={rowIndex}>
                                        {daysInMonth
                                            .slice(rowIndex * 7, (rowIndex + 1) * 7)
                                            .map((day, index) => {
                                                const eventList = getEventForDate(day);
                                                return (
                                                    <td
                                                        key={index}
                                                        style={{
                                                            cursor: day ? "default" : "not-allowed",
                                                            backgroundColor: eventList.length > 0 ? "#ce2029" : "white",
                                                            color: eventList.length > 0 ? "white" : "black",
                                                        }}
                                                        title={
                                                            eventList.length > 0
                                                                ? eventList.map(e => e.title).join("\n")
                                                                : ""
                                                        }
                                                    >
                                                        {day ? (
                                                            <div style={{ width: "100%", height: "100%" }}>
                                                                <span className="text-end d-block">{day.date()}</span>
                                                            </div>
                                                        ) : (
                                                            ""
                                                        )}
                                                    </td>
                                                );
                                            })}
                                    </tr>
                                ))}
                            </tbody>
                        </table>
                    </div>

                    <div className="col-lg-9" data-aos="fade-up" data-aos-duration={1000}>
                        <div className="tab-content" id="pills-tabContent">
                            <div className={"tab-pane fade show active tab-pane fade"} id="pills-home" role="tabpanel" aria-labelledby="pills-home-tab" tabIndex={0}>
                                <div className="event-widget-area">
                                    {events.map((event, idx) => {
                                        const isEven = (idx + 1) % 2 === 0;
                                        const buttonHref = event.url || event.link || "#";
                                        const isExternalButton = /^https?:\/\//.test(buttonHref);

                                        return (
                                            <div key={event.id} className="mb-5">
                                                <div className="row align-items-center">
                                                    <div className="col-lg-12">
                                                        <div className="event2-boxarea box1">
                                                            <h1 className="active">{String(idx + 1).padStart(2, "0")}</h1>
                                                            <div className="row align-items-center">
                                                                {!isEven ? (
                                                                    <>
                                                                        <div className="col-lg-5">
                                                                            <div className="img1">
                                                                                <img src={event.image} alt={event.title} />
                                                                            </div>
                                                                        </div>

                                                                        <div className="col-lg-2" />

                                                                        <div className="col-lg-5">
                                                                            <div className="content-area">
                                                                                <ul>
                                                                                    <li>
                                                                                        <span className='d-flex g-3 metered-data'>
                                                                                            <img src={event.time ? "/assets/img/icons/clock1.svg" : "/assets/img/icons/calender1.svg"} alt={event.time ? "clock" : "calendar"} />{" "}
                                                                                            {event.time ? `${event.time} - ` : ""}
                                                                                            {formatEventDate(event.date)}
                                                                                        </span>
                                                                                    </li>
                                                                                    {event.location && event.location.trim() && (
                                                                                        <li>
                                                                                            <span className='d-flex g-3 metered-data'>
                                                                                                <img src="/assets/img/icons/location1.svg" alt="" />{" "}
                                                                                                {event.location}
                                                                                            </span>
                                                                                        </li>
                                                                                    )}
                                                                                </ul>
                                                                                <div className="space20" />
                                                                                <Link href={event.link || "#"} className="head">{event.title}</Link>
                                                                                <div className="space24" />
                                                                                <p
                                                                                    style={{
                                                                                        display: '-webkit-box',
                                                                                        WebkitLineClamp: 2,
                                                                                        WebkitBoxOrient: 'vertical',
                                                                                        overflow: 'hidden',
                                                                                        textOverflow: 'ellipsis',
                                                                                    }}
                                                                                >
                                                                                    {event.desc}
                                                                                </p>

                                                                                <div className="space24" />
                                                                                <div className="btn-area1">
                                                                                    <Link
                                                                                        href={buttonHref}
                                                                                        className="vl-btn3"
                                                                                        {...(isExternalButton ? { target: "_blank", rel: "noopener noreferrer" } : {})}
                                                                                    >
                                                                                        <span className="demo">{event.btnText || "Online Tickets"}</span>
                                                                                    </Link>
                                                                                </div>
                                                                            </div>
                                                                        </div>
                                                                    </>
                                                                ) : (
                                                                    <>
                                                                        <div className="col-lg-5">
                                                                            <div className="content-area">
                                                                                <ul>
                                                                                    <li>
                                                                                        <span className='d-flex g-3 metered-data'>
                                                                                            <img src={event.time ? "/assets/img/icons/clock1.svg" : "/assets/img/icons/calender1.svg"} alt={event.time ? "clock" : "calendar"} />{" "}
                                                                                            {event.time ? `${event.time} - ` : ""}
                                                                                            {formatEventDate(event.date)}
                                                                                        </span>
                                                                                    </li>
                                                                                    {event.location && event.location.trim() && (
                                                                                        <li>
                                                                                            <span className='d-flex g-3 metered-data'>
                                                                                                <img src="/assets/img/icons/location1.svg" alt="" />{" "}
                                                                                                {event.location}
                                                                                            </span>
                                                                                        </li>
                                                                                    )}
                                                                                </ul>
                                                                                <div className="space20" />
                                                                                <Link href={event.link || "#"} className="head">{event.title}</Link>
                                                                                <div className="space24" />
                                                                                <p
                                                                                    style={{
                                                                                        display: '-webkit-box',
                                                                                        WebkitLineClamp: 2,
                                                                                        WebkitBoxOrient: 'vertical',
                                                                                        overflow: 'hidden',
                                                                                        textOverflow: 'ellipsis',
                                                                                    }}
                                                                                >
                                                                                    {event.desc}
                                                                                </p>
                                                                                <div className="space24" />
                                                                                <div className="btn-area1">
                                                                                    <Link
                                                                                        href={buttonHref}
                                                                                        className="vl-btn3"
                                                                                        {...(isExternalButton ? { target: "_blank", rel: "noopener noreferrer" } : {})}
                                                                                    >
                                                                                        <span className="demo">{event.btnText || "Online Tickets"}</span>
                                                                                    </Link>
                                                                                </div>
                                                                            </div>
                                                                        </div>

                                                                        <div className="col-lg-2" />

                                                                        <div className="col-lg-5">
                                                                            <div className="img1">
                                                                                <img src={event.image} alt={event.title} />
                                                                            </div>
                                                                        </div>
                                                                    </>
                                                                )}
                                                            </div>
                                                        </div>
                                                    </div>
                                                </div>
                                            </div>
                                        );
                                    })}
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    )
}