import React, { useEffect, useState } from "react";
import axios from "axios";
import { useToast } from "@/hooks/useToast";
import { Tag } from "primereact/tag";
import Image from "next/image";
import { useRouter } from "next/router";
import ResourcePaymentButton from "@/components/bitcoinConnect/ResourcePaymentButton";
import ZapDisplay from "@/components/zaps/ZapDisplay";
import GenericButton from "@/components/buttons/GenericButton";
import { useImageProxy } from "@/hooks/useImageProxy";
import { useZapsSubscription } from "@/hooks/nostrQueries/zaps/useZapsSubscription";
import { getTotalFromZaps } from "@/utils/lightning";
import { useSession } from "next-auth/react";
import useWindowWidth from "@/hooks/useWindowWidth";
import dynamic from "next/dynamic";

const MDDisplay = dynamic(
    () => import("@uiw/react-markdown-preview"),
    {
        ssr: false,
    }
);

const lnAddress = process.env.NEXT_PUBLIC_LIGHTNING_ADDRESS;

const DocumentDetails = ({ processedEvent, topics, title, summary, image, price, author, paidResource, decryptedContent, handlePaymentSuccess, handlePaymentError, authorView }) => {
    const [zapAmount, setZapAmount] = useState(0);
    const router = useRouter();
    const { returnImageProxy } = useImageProxy();
    const { zaps, zapsLoading, zapsError } = useZapsSubscription({ event: processedEvent });
    const { data: session, status } = useSession();
    const { showToast } = useToast();
    const windowWidth = useWindowWidth();

    useEffect(() => {
        if (zaps.length > 0) {
            const total = getTotalFromZaps(zaps, processedEvent);
            setZapAmount(total);
        }
    }, [zaps, processedEvent]);

    const handleDelete = async () => {
        try {
            const response = await axios.delete(`/api/resources/${processedEvent.d}`);
            if (response.status === 204) {
                showToast('success', 'Success', 'Resource deleted successfully.');
                router.push('/');
            }
        } catch (error) {
            if (error.response && error.response.data && error.response.data.error.includes("Invalid `prisma.resource.delete()`")) {
                showToast('error', 'Error', 'Resource cannot be deleted because it is part of a course, delete the course first.');
            }
            else if (error.response && error.response.data && error.response.data.error) {
                showToast('error', 'Error', error.response.data.error);
            } else {
                showToast('error', 'Error', 'Failed to delete resource. Please try again.');
            }
        }
    }

    const renderPaymentMessage = () => {
        if (session?.user && session.user?.role?.subscribed && decryptedContent) {
            return <GenericButton tooltipOptions={{ position: 'top' }} tooltip={`You are subscribed so you can access all paid content`} icon="pi pi-check" label="Subscribed" severity="success" outlined size="small" className="cursor-default hover:opacity-100 hover:bg-transparent focus:ring-0" />
        }

        if (paidResource && decryptedContent && author && processedEvent?.pubkey !== session?.user?.pubkey && !session?.user?.role?.subscribed) {
            return <GenericButton icon="pi pi-check" label={`Paid ${processedEvent.price} sats`} severity="success" outlined size="small" className="cursor-default hover:opacity-100 hover:bg-transparent focus:ring-0" />
        }

        if (paidResource && author && processedEvent?.pubkey === session?.user?.pubkey) {
            return <GenericButton tooltipOptions={{ position: 'top' }} tooltip={`You created this paid content, users must pay ${processedEvent.price} sats to access it`} icon="pi pi-check" label={`Price ${processedEvent.price} sats`} severity="success" outlined size="small" className="cursor-default hover:opacity-100 hover:bg-transparent focus:ring-0" />
        }

        return null;
    };

    const renderContent = () => {
        if (decryptedContent) {
            return <MDDisplay className='p-4 rounded-lg w-full' source={decryptedContent} />;
        }
        if (paidResource && !decryptedContent) {
            return (
                <div className="w-full p-8 rounded-lg flex flex-col items-center justify-center bg-gray-100 dark:bg-gray-800">
                    <div className="mx-auto py-auto">
                        <i className="pi pi-lock text-[60px] text-red-500"></i>
                    </div>
                    <p className="text-center text-xl text-red-500 mt-4">
                        This content is paid and needs to be purchased before viewing.
                    </p>
                    <div className="flex flex-row items-center justify-center w-full mt-4">
                        <ResourcePaymentButton
                            lnAddress={lnAddress}
                            amount={price}
                            onSuccess={handlePaymentSuccess}
                            onError={handlePaymentError}
                            resourceId={processedEvent.d}
                        />
                    </div>
                </div>
            );
        }
        if (processedEvent?.content) {
            return <MDDisplay className='p-4 rounded-lg w-full' source={processedEvent.content} />;
        }
        return null;
    }

    return (
        <div className="w-full">
            <div className="relative w-full h-[400px] mb-8">
                <Image
                    alt="background image"
                    src={returnImageProxy(image)}
                    fill
                    className="object-cover"
                />
                <div className="absolute inset-0 bg-black bg-opacity-20"></div>
            </div>
            <div className="w-full mx-auto px-4 py-8 -mt-32 relative z-10">
                <div className="mb-8 bg-gray-800/90 rounded-lg p-4">
                    <div className="flex flex-row items-center justify-between w-full">
                        <h1 className='text-4xl font-bold text-white'>{title}</h1>
                        <div className="flex flex-wrap gap-2">
                            {topics && topics.length > 0 && (
                                topics.map((topic, index) => (
                                    <Tag className='text-white' key={index} value={topic}></Tag>
                                ))
                            )}
                        </div>
                    </div>
                    <p className='text-xl text-gray-200 mb-4 mt-4'>{summary}</p>
                    <div className='flex items-center justify-between'>
                        <div className='flex items-center'>
                            <Image
                                alt="avatar image"
                                src={returnImageProxy(author?.avatar, author?.username)}
                                width={50}
                                height={50}
                                className="rounded-full mr-4"
                            />
                            <p className='text-lg text-white'>
                                By{' '}
                                <a rel='noreferrer noopener' target='_blank' className='text-blue-300 hover:underline'>
                                    {author?.username}
                                </a>
                            </p>
                        </div>
                        <ZapDisplay
                            zapAmount={zapAmount}
                            event={processedEvent}
                            zapsLoading={zapsLoading && zapAmount === 0}
                        />
                    </div>
                </div>
            </div>
            {renderContent()}

            <div className='w-full mt-8 flex flex-wrap justify-between items-center'>
                {renderPaymentMessage()}
                {authorView && (
                    <div className='flex space-x-2 mt-4 sm:mt-0'>
                        <GenericButton onClick={() => router.push(`/details/${processedEvent.id}/edit`)} label="Edit" severity='warning' outlined />
                        <GenericButton onClick={handleDelete} label="Delete" severity='danger' outlined />
                    </div>
                )}
            </div>
        </div>
    )
}

export default DocumentDetails;