'use client';
import {Dispatch, SetStateAction, useContext, useEffect, useState} from 'react';
import {useTranslations} from '@/lib/i18n';
import {AlertContext, AlertContextProps} from '@/context/AlertContext';
import {LangContext, LangContextProps} from '@/context/LangContext';
import {SessionProps} from '@/lib/types/session';
import {guideTourDone, setNewGuideTour} from '@/lib/utils/user';
import {apiPost} from '@/lib/api/client';
import {GuideStep} from '@/components/GuideTour';
import OfflineContext, {OfflineContextType} from '@/context/OfflineContext';

interface UseOnboardingReturn {
    isTermsAccepted: boolean;
    homeStepsGuide: boolean;
    setHomeStepsGuide: Dispatch<SetStateAction<boolean>>;
    handleTermsAcceptance: () => Promise<void>;
    handleHomeTour: () => Promise<void>;
    homeSteps: GuideStep[];
}

interface UseOnboardingParams {
    session: SessionProps;
    setSession: Dispatch<SetStateAction<SessionProps>>;
}

export default function useOnboarding({session, setSession}: UseOnboardingParams): UseOnboardingReturn {
    const t = useTranslations();
    const {lang: locale}: LangContextProps = useContext<LangContextProps>(LangContext);
    const {errorMessage}: AlertContextProps = useContext<AlertContextProps>(AlertContext);
    const {isCurrentlyOffline}: OfflineContextType = useContext<OfflineContextType>(OfflineContext);

    const [isTermsAccepted, setIsTermsAccepted] = useState<boolean>(false);
    const [homeStepsGuide, setHomeStepsGuide] = useState<boolean>(false);

    useEffect((): void => {
        if (isCurrentlyOffline()) {
            setIsTermsAccepted(true);
            const localGuideDone: boolean = localStorage.getItem('guide-tour-home-basic') === 'true';
            setHomeStepsGuide(!localGuideDone);
            return;
        }
        if (session.isConnected) {
            setIsTermsAccepted(session.user?.termsAccepted ?? false);
            const guides: string[] = ['home-basic', 'new-first-book'];
            for (const guide of guides) {
                const done: boolean = !guideTourDone(session.user?.guideTour ?? [], guide);
                localStorage.setItem(`guide-tour-${guide}`, done ? 'true' : 'false');
            }
            setHomeStepsGuide(guideTourDone(session.user?.guideTour ?? [], 'home-basic'));
        }
    }, [session]);

    const homeSteps: GuideStep[] = [
        {
            id: 0,
            x: 50,
            y: 50,
            title: t('homePage.guide.welcome', {name: session.user?.name || ''}),
            content: (
                <>
                    <p>{t('homePage.guide.step0.description1')}</p>
                    <br/>
                    <p>{t('homePage.guide.step0.description2')}</p>
                </>
            ),
        },
        {
            id: 1, position: 'right',
            targetSelector: `[data-guide="left-panel-container"]`,
            title: t('homePage.guide.step1.title'),
            content: (
                <>
                    <p className={'flex items-center space-x-2'}>
                        <strong>{t('homePage.guide.step1.addBook')}</strong>
                    </p>
                    <br/>
                    <p><strong>{t('homePage.guide.step1.generateStory')}</strong></p>
                </>
            ),
        },
        {
            id: 2,
            title: t('homePage.guide.step2.title'), position: 'bottom',
            targetSelector: `[data-guide="search-bar"]`,
            content: (
                <p>{t('homePage.guide.step2.description')}</p>
            ),
        },
        {
            id: 3,
            title: t('homePage.guide.step3.title'),
            targetSelector: `[data-guide="user-dropdown"]`,
            position: 'auto',
            content: (
                <p>{t('homePage.guide.step3.description')}</p>
            ),
        },
        {
            id: 4,
            title: t('homePage.guide.step4.title'),
            content: (
                <>
                    <p>{t('homePage.guide.step4.description1')}</p>
                    <br/>
                    <p>{t('homePage.guide.step4.description2')}</p>
                </>
            ),
        },
    ];

    async function handleTermsAcceptance(): Promise<void> {
        try {
            const response: boolean = await apiPost<boolean>(`user/terms/accept`, {
                version: '2025-07-1'
            }, session.accessToken, locale);
            if (response && session.user) {
                setIsTermsAccepted(true);
                setHomeStepsGuide(true);
                const newSession: SessionProps = {
                    ...session,
                    user: {
                        ...session.user,
                        termsAccepted: true
                    }
                };
                setSession(newSession);
            } else {
                errorMessage(t('homePage.errors.termsAcceptError'));
            }
        } catch (e: unknown) {
            if (e instanceof Error) {
                errorMessage(e.message);
            } else {
                errorMessage(t('homePage.errors.termsAcceptError'));
            }
        }
    }

    async function handleHomeTour(): Promise<void> {
        if (isCurrentlyOffline()) {
            localStorage.setItem('guide-tour-home-basic', 'true');
            setHomeStepsGuide(false);
            return;
        }
        try {
            const response: boolean = await apiPost<boolean>('logs/tour', {
                    plateforme: 'desktop',
                    tour: 'home-basic'
                },
                session.accessToken,
                locale
            );
            if (response) {
                localStorage.setItem('guide-tour-home-basic', 'true');
                setSession(setNewGuideTour(session, 'home-basic'));
                setHomeStepsGuide(false);
            }
        } catch (e: unknown) {
            if (e instanceof Error) {
                errorMessage(e.message);
            } else {
                errorMessage(t('homePage.errors.termsError'));
            }
        }
    }

    return {
        isTermsAccepted,
        homeStepsGuide,
        setHomeStepsGuide,
        handleTermsAcceptance,
        handleHomeTour,
        homeSteps,
    };
}