import { useEffect, useState } from 'react';
import { newSubmissionKey } from '@/lib/portal-api';
export function useInterestDraft<T>(name: string, initial: T) {
    const storage = 'investemoz-interest:' + name;
    const [draft, setDraft] = useState<{ form: T; key: string }>(() => {
        try {
            const value = JSON.parse(sessionStorage.getItem(storage) ?? 'null');
            if (value?.form && typeof value.key === 'string') return value;
        } catch {
            /* unavailable storage leaves the current form usable */
        }
        return { form: initial, key: newSubmissionKey() };
    });
    useEffect(() => {
        try {
            sessionStorage.setItem(storage, JSON.stringify(draft));
        } catch {}
    }, [storage, draft]);
    const setForm = (value: T | ((old: T) => T)) =>
        setDraft((old) => ({
            ...old,
            form:
                typeof value === 'function'
                    ? (value as (old: T) => T)(old.form)
                    : value,
        }));
    return {
        form: draft.form,
        setForm,
        key: draft.key,
        clear: () => {
            try {
                sessionStorage.removeItem(storage);
                sessionStorage.removeItem('investemoz-participation-identity');
            } catch {
                /* Storage failure must not turn a confirmed submission into an error. */
            }
        },
        authenticate: () => {
            const identity = draft.form as {
                name?: string;
                fullName?: string;
                email?: string;
            };
            try {
                sessionStorage.setItem(
                    'investemoz-participation-identity',
                    JSON.stringify({
                        name: identity.fullName ?? identity.name ?? '',
                        email: identity.email ?? '',
                    }),
                );
                sessionStorage.setItem(storage, JSON.stringify(draft));
            } catch {
                /* Authentication remains available when browser persistence is blocked. */
            }
            window.location.assign(
                '/participar/entrar?return=' +
                    encodeURIComponent(location.pathname + location.search),
            );
        },
    };
}