const { test } = require('node:test');
const assert = require('node:assert');
const { buildFolderTree } = require('../src/n8nTree');

test('buildFolderTree returns an empty array when there are no folders or workflows', () => {
  assert.deepStrictEqual(buildFolderTree([], []), []);
});

test('buildFolderTree places root-level workflows (no parentFolder) directly at the top', () => {
  const workflows = [{ id: 'w1', name: 'ワークフローA', active: true, parentFolder: null }];
  const tree = buildFolderTree([], workflows);
  assert.deepStrictEqual(tree, [{ type: 'workflow', id: 'w1', name: 'ワークフローA', active: true }]);
});

test('buildFolderTree places root-level folders (no parentFolderId) at the top with empty children', () => {
  const folders = [{ id: 'f1', name: 'フォルダA', parentFolderId: null }];
  const tree = buildFolderTree(folders, []);
  assert.deepStrictEqual(tree, [{ type: 'folder', id: 'f1', name: 'フォルダA', children: [] }]);
});

test('buildFolderTree nests a workflow inside its parent folder', () => {
  const folders = [{ id: 'f1', name: 'フォルダA', parentFolderId: null }];
  const workflows = [{ id: 'w1', name: 'ワークフローA', active: false, parentFolder: { id: 'f1' } }];
  const tree = buildFolderTree(folders, workflows);
  assert.deepStrictEqual(tree, [
    {
      type: 'folder',
      id: 'f1',
      name: 'フォルダA',
      children: [{ type: 'workflow', id: 'w1', name: 'ワークフローA', active: false }],
    },
  ]);
});

test('buildFolderTree nests a sub-folder inside its parent folder', () => {
  const folders = [
    { id: 'f1', name: '親フォルダ', parentFolderId: null },
    { id: 'f2', name: '子フォルダ', parentFolderId: 'f1' },
  ];
  const tree = buildFolderTree(folders, []);
  assert.deepStrictEqual(tree, [
    {
      type: 'folder',
      id: 'f1',
      name: '親フォルダ',
      children: [{ type: 'folder', id: 'f2', name: '子フォルダ', children: [] }],
    },
  ]);
});

test('buildFolderTree sorts folders before workflows, each alphabetically by name', () => {
  const folders = [
    { id: 'f2', name: 'Zフォルダ', parentFolderId: null },
    { id: 'f1', name: 'Aフォルダ', parentFolderId: null },
  ];
  const workflows = [
    { id: 'w2', name: 'Zワークフロー', active: true, parentFolder: null },
    { id: 'w1', name: 'Aワークフロー', active: true, parentFolder: null },
  ];
  const tree = buildFolderTree(folders, workflows);
  assert.deepStrictEqual(
    tree.map((n) => n.name),
    ['Aフォルダ', 'Zフォルダ', 'Aワークフロー', 'Zワークフロー']
  );
});