/**
 * DTP-08 — folder depth cap.
 */

import { describe, expect, it } from "@suaveplan/testing/runner";
import type { FolderTemplate } from "../src/index.js";
import {
    assertFolderDepth,
    type DriveTemplateError,
    DTP_CODES,
    MAX_FOLDER_DEPTH,
} from "../src/index.js";

function chain(depth: number): FolderTemplate {
    let node: FolderTemplate = { name: `level-${depth}`, children: [] };
    for (let i = depth - 1; i >= 0; i--) {
        node = { name: `level-${i}`, children: [node] };
    }
    return node;
}

describe("DTP-08 — folder depth cap", () => {
    it("MAX_FOLDER_DEPTH pinned at 32", { timeout: 5000 }, () => {
        expect(MAX_FOLDER_DEPTH).toBe(32);
    });

    it("depth-32 nested folder accepted", { timeout: 5000 }, () => {
        const tree = chain(32);
        expect(() => assertFolderDepth(tree)).not.toThrow();
    });

    it("depth-33 nested folder rejected", { timeout: 5000 }, () => {
        const tree = chain(33);
        try {
            assertFolderDepth(tree);
            throw new Error("expected TOO_DEEP");
        } catch (err) {
            expect((err as DriveTemplateError).code).toBe(
                DTP_CODES.TEMPLATE_TOO_DEEP
            );
        }
    });
});