import { describe, expect, it } from 'vitest';

import { parseImportPath } from '@/lib/services/document-import';

describe('parseImportPath', () => {
  it('splits a nested key into folders + filename', () => {
    expect(parseImportPath('legacy', 'legacy/Deals 2026/Q1/contract.pdf')).toEqual({
      folderSegments: ['Deals 2026', 'Q1'],
      filename: 'contract.pdf',
    });
  });

  it('returns empty folderSegments for a file at the prefix root', () => {
    expect(parseImportPath('legacy', 'legacy/index.pdf')).toEqual({
      folderSegments: [],
      filename: 'index.pdf',
    });
  });

  it('tolerates trailing slashes on the prefix', () => {
    expect(parseImportPath('legacy/', 'legacy/Deals/x.pdf')).toEqual({
      folderSegments: ['Deals'],
      filename: 'x.pdf',
    });
    expect(parseImportPath('legacy///', 'legacy/Deals/x.pdf')).toEqual({
      folderSegments: ['Deals'],
      filename: 'x.pdf',
    });
  });

  it('collapses empty intermediate segments', () => {
    expect(parseImportPath('legacy', 'legacy/a//b/c.pdf')).toEqual({
      folderSegments: ['a', 'b'],
      filename: 'c.pdf',
    });
  });

  it('handles an empty prefix as "list-the-whole-bucket"', () => {
    expect(parseImportPath('', 'Folder/file.pdf')).toEqual({
      folderSegments: ['Folder'],
      filename: 'file.pdf',
    });
  });

  it('preserves special characters in folder names', () => {
    expect(parseImportPath('', "Q1 - Year's End/contract & rider.pdf")).toEqual({
      folderSegments: ["Q1 - Year's End"],
      filename: 'contract & rider.pdf',
    });
  });

  it('throws when the key is not under the prefix', () => {
    expect(() => parseImportPath('legacy', 'other/x.pdf')).toThrow(/not under prefix/);
  });

  it('throws when the relative path has no filename', () => {
    expect(() => parseImportPath('legacy', 'legacy/')).toThrow(/no filename/);
    expect(() => parseImportPath('', '')).toThrow(/no filename/);
  });
});