import { describe, it, expect, beforeEach, afterEach } from 'vitest';
import { mkdtempSync, rmSync, existsSync, readFileSync } from 'fs';
import { tmpdir } from 'os';
import { join } from 'path';
import { saveFile, deleteStoredFile, getFilePath } from '../../src/services/storage.ts';

describe('services/storage', () => {
  let uploadDir: string;

  beforeEach(() => {
    uploadDir = mkdtempSync(join(tmpdir(), 'nanodrop-test-'));
  });

  afterEach(() => {
    rmSync(uploadDir, { recursive: true, force: true });
  });

  it('saves a file buffer and returns stored name', async () => {
    const content = Buffer.from('hello world');
    const storedName = await saveFile(uploadDir, 'file1.txt', content);
    expect(storedName).toBe('file1.txt');
    expect(existsSync(join(uploadDir, 'file1.txt'))).toBe(true);
    expect(readFileSync(join(uploadDir, 'file1.txt'))).toEqual(content);
  });

  it('returns full path for a stored file', () => {
    const path = getFilePath(uploadDir, 'file1.txt');
    expect(path).toBe(join(uploadDir, 'file1.txt'));
  });

  it('deletes a stored file', async () => {
    const content = Buffer.from('to delete');
    await saveFile(uploadDir, 'todelete.txt', content);
    expect(existsSync(join(uploadDir, 'todelete.txt'))).toBe(true);
    await deleteStoredFile(uploadDir, 'todelete.txt');
    expect(existsSync(join(uploadDir, 'todelete.txt'))).toBe(false);
  });

  it('does not throw when deleting non-existent file', async () => {
    await expect(deleteStoredFile(uploadDir, 'ghost.txt')).resolves.not.toThrow();
  });
});