import type { LinkSet, PageSection } from "#types/writing.types";
import { absolutePath } from "@ssot/paths";
import { readJsonOrNull } from "#core/persistence/report.persistence";

const isLinkSet = function isLinkSet(value: unknown): value is LinkSet {
    return (
        typeof value === "object" &&
        value !== null &&
        Object.values(value).every(
            (links: unknown) => Array.isArray(links) && links.every((link: unknown) => typeof link === "string"),
        )
    );
};

export const linkTarget = function linkTarget(): string {
    return absolutePath("govlabHost.reports.content.linkSet");
};

export const readLinkSet = function readLinkSet(): LinkSet | null {
    const parsed = readJsonOrNull(linkTarget());
    return isLinkSet(parsed) ? parsed : null;
};

export const linkSetOf = function linkSetOf(sections: readonly PageSection[]): LinkSet {
    return Object.fromEntries(sections.map((section) => [section.key, section.links]));
};