import { afterEach, beforeEach, describe, expect, it } from 'vitest';
import fs from 'node:fs';
import os from 'node:os';
import path from 'node:path';
import { listPerUinOneBotConfigFiles, readBackupConfigFile } from '../src/webui/server';

describe('backup filesystem adapter', () => {
    let root: string;

    beforeEach(() => {
        root = fs.mkdtempSync(path.join(os.tmpdir(), 'snowluma-backup-http-'));
    });

    afterEach(() => {
        fs.rmSync(root, { recursive: true, force: true });
    });

    it('treats only a missing file as absent', () => {
        expect(readBackupConfigFile(root, 'missing.json')).toBeNull();

        fs.mkdirSync(path.join(root, 'runtime.json'));
        expect(() => readBackupConfigFile(root, 'runtime.json')).toThrow();
    });

    it('treats only a missing config directory as an empty OneBot list', () => {
        expect(listPerUinOneBotConfigFiles(path.join(root, 'missing'))).toEqual([]);

        const notDirectory = path.join(root, 'not-a-directory');
        fs.writeFileSync(notDirectory, 'x');
        expect(() => listPerUinOneBotConfigFiles(notDirectory)).toThrow();
    });
});