import { WORK_ORDERS_ROUTE } from "@/domain/dashboard/utils/work-order-drilldown-links";

const WORK_ORDER_PARAM = "wo";
const TAB_PARAM = "tab";
const SINCE_PARAM = "since";
const FOCUS_PARAM = "focus";
const MENTIONS_FOCUS = "mentions";
const COMMENTS_FOCUS = "comments";

export const WORK_ORDER_DEEP_LINK_TABS = [
  "info",
  "comments",
  "audit",
  "completion",
  "extras",
  "uplifts",
] as const;

export type WorkOrderDeepLinkTab = (typeof WORK_ORDER_DEEP_LINK_TABS)[number];

/**
 * The comments a notification was raised for: everything by someone else from `since` on,
 * either the ones that mention the user or the ones that do not.
 */
export type CommentHighlight = {
  since: string;
  mentions: boolean;
};

export type WorkOrderDeepLink = {
  workOrderId: string;
  tab: WorkOrderDeepLinkTab;
  highlight: CommentHighlight | null;
};

function isDeepLinkTab(value: string | null): value is WorkOrderDeepLinkTab {
  return WORK_ORDER_DEEP_LINK_TABS.some((tab) => tab === value);
}

/**
 * `/workorders?wo=<id>&tab=<tab>` opens that work order's slide-over on the given tab; `uplifts`
 * opens its uplifts dialog. A Comments link can also carry the comments to highlight.
 */
export function workOrderDeepLinkUrl(
  workOrderId: string | number,
  tab?: string | null,
  highlight?: CommentHighlight | null,
): string {
  const search = new URLSearchParams({ [WORK_ORDER_PARAM]: String(workOrderId) });
  if (isDeepLinkTab(tab ?? null)) {
    search.set(TAB_PARAM, String(tab));
  }
  if (tab === "comments" && highlight != null) {
    search.set(SINCE_PARAM, highlight.since);
    search.set(FOCUS_PARAM, highlight.mentions ? MENTIONS_FOCUS : COMMENTS_FOCUS);
  }
  return `${WORK_ORDERS_ROUTE}?${search.toString()}`;
}

function parseHighlight(
  params: URLSearchParams,
  tab: WorkOrderDeepLinkTab,
): CommentHighlight | null {
  const since = params.get(SINCE_PARAM) ?? "";
  const focus = params.get(FOCUS_PARAM);
  if (tab !== "comments" || Number.isNaN(Date.parse(since))) {
    return null;
  }
  if (focus !== MENTIONS_FOCUS && focus !== COMMENTS_FOCUS) {
    return null;
  }
  return { since, mentions: focus === MENTIONS_FOCUS };
}

export function parseWorkOrderDeepLink(params: URLSearchParams): WorkOrderDeepLink | null {
  const workOrderId = (params.get(WORK_ORDER_PARAM) ?? "").trim();
  if (!/^\d+$/.test(workOrderId)) {
    return null;
  }
  const requested = params.get(TAB_PARAM);
  const tab = isDeepLinkTab(requested) ? requested : "info";
  return { workOrderId, tab, highlight: parseHighlight(params, tab) };
}

export function withoutWorkOrderDeepLink(params: URLSearchParams): URLSearchParams {
  const next = new URLSearchParams(params);
  next.delete(WORK_ORDER_PARAM);
  next.delete(TAB_PARAM);
  next.delete(SINCE_PARAM);
  next.delete(FOCUS_PARAM);
  return next;
}