/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest';
import * as fs from 'node:fs/promises';
import * as os from 'node:os';
import * as path from 'node:path';
import { loadSkillsFromDir } from './skillLoader.js';
import { coreEvents } from '../utils/events.js';
describe('skillLoader', () => {
    let testRootDir;
    beforeEach(async () => {
        testRootDir = await fs.mkdtemp(path.join(os.tmpdir(), 'skill-loader-test-'));
        vi.spyOn(coreEvents, 'emitFeedback');
    });
    afterEach(async () => {
        await fs.rm(testRootDir, { recursive: true, force: true });
        vi.restoreAllMocks();
    });
    it('should load skills from a directory with valid SKILL.md', async () => {
        const skillDir = path.join(testRootDir, 'my-skill');
        await fs.mkdir(skillDir, { recursive: true });
        const skillFile = path.join(skillDir, 'SKILL.md');
        await fs.writeFile(skillFile, `---\nname: my-skill\ndescription: A test skill\n---\n# Instructions\nDo something.\n`);
        const skills = await loadSkillsFromDir(testRootDir);
        expect(skills).toHaveLength(1);
        expect(skills[0].name).toBe('my-skill');
        expect(skills[0].description).toBe('A test skill');
        expect(skills[0].location).toBe(skillFile);
        expect(skills[0].body).toBe('# Instructions\nDo something.');
        expect(coreEvents.emitFeedback).not.toHaveBeenCalled();
    });
    it('should emit feedback when no valid skills are found in a non-empty directory', async () => {
        const notASkillDir = path.join(testRootDir, 'not-a-skill');
        await fs.mkdir(notASkillDir, { recursive: true });
        await fs.writeFile(path.join(notASkillDir, 'some-file.txt'), 'hello');
        const skills = await loadSkillsFromDir(testRootDir);
        expect(skills).toHaveLength(0);
        expect(coreEvents.emitFeedback).toHaveBeenCalledWith('warning', expect.stringContaining('Failed to load skills from'));
    });
    it('should ignore empty directories and not emit feedback', async () => {
        const skills = await loadSkillsFromDir(testRootDir);
        expect(skills).toHaveLength(0);
        expect(coreEvents.emitFeedback).not.toHaveBeenCalled();
    });
    it('should ignore directories without SKILL.md', async () => {
        const notASkillDir = path.join(testRootDir, 'not-a-skill');
        await fs.mkdir(notASkillDir, { recursive: true });
        // With a subdirectory, even if empty, it might still trigger readdir
        // But my current logic is if discoveredSkills.length === 0, then check readdir
        // If readdir is empty, it's fine.
        const skills = await loadSkillsFromDir(testRootDir);
        expect(skills).toHaveLength(0);
        // If notASkillDir is empty, no warning.
    });
    it('should ignore SKILL.md without valid frontmatter and emit warning if directory is not empty', async () => {
        const skillDir = path.join(testRootDir, 'invalid-skill');
        await fs.mkdir(skillDir, { recursive: true });
        const skillFile = path.join(skillDir, 'SKILL.md');
        await fs.writeFile(skillFile, '# No frontmatter here');
        const skills = await loadSkillsFromDir(testRootDir);
        expect(skills).toHaveLength(0);
        expect(coreEvents.emitFeedback).toHaveBeenCalledWith('warning', expect.stringContaining('Failed to load skills from'));
    });
    it('should return empty array for non-existent directory', async () => {
        const skills = await loadSkillsFromDir('/non/existent/path');
        expect(skills).toEqual([]);
        expect(coreEvents.emitFeedback).not.toHaveBeenCalled();
    });
});
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