import type { ChecklistItem, OnboardingCounters } from "../shared/types";

/**
 * Pure computation of the getting-started checklist (#351).
 *
 * Six rows in a fixed order. The `profile` row is always done (the checklist
 * is only reachable from an open profile). The `budget` row is locked when the
 * edition does not include Budget; a locked row is excluded from `total` and
 * from `complete`, and links to the Users settings (license card) instead.
 */

export interface ChecklistOptions {
  /** An import folder has been chosen. */
  importFolderSet: boolean;
  /** The Budget feature is part of the current edition. */
  budgetAllowed: boolean;
}

export interface Checklist {
  items: ChecklistItem[];
  /** Number of unlocked rows that are done. */
  done: number;
  /** Number of unlocked rows (6, or 5 when Budget is locked). */
  total: number;
  /** True when every unlocked row is done. */
  complete: boolean;
}

export function computeChecklist(
  counters: OnboardingCounters,
  options: ChecklistOptions
): Checklist {
  const budgetLocked = !options.budgetAllowed;
  const items: ChecklistItem[] = [
    // Always done: the checklist only exists inside an open profile. The link
    // is never rendered for a done row (#352); it points at profile management.
    { key: "profile", done: true, locked: false, to: "/settings/users" },
    { key: "importFolder", done: options.importFolderSet, locked: false, to: "/import" },
    { key: "source", done: counters.sources >= 1, locked: false, to: "/import" },
    { key: "import", done: counters.imports >= 1, locked: false, to: "/import" },
    {
      key: "manualCategory",
      done: counters.manualCategorized >= 1,
      locked: false,
      to: "/transactions",
    },
    {
      key: "budget",
      done: counters.budgetEntries >= 1,
      locked: budgetLocked,
      to: budgetLocked ? "/settings/users" : "/budget",
    },
  ];

  const unlocked = items.filter((item) => !item.locked);
  const done = unlocked.filter((item) => item.done).length;
  const total = unlocked.length;

  return { items, done, total, complete: done === total };
}