import { describe, it, expect, vi, beforeEach } from "vitest";

vi.mock("node:fs", () => ({
  readFileSync: vi.fn(),
}));

vi.mock("@skills-hub-ai/skill-parser", () => ({
  parseSkillMd: vi.fn(),
}));

import { readAndParseSkillMd } from "./skill-file.js";
import { readFileSync } from "node:fs";
import { parseSkillMd } from "@skills-hub-ai/skill-parser";

const mockReadFileSync = vi.mocked(readFileSync);
const mockParseSkillMd = vi.mocked(parseSkillMd);

beforeEach(() => {
  vi.clearAllMocks();
});

describe("readAndParseSkillMd", () => {
  it("returns parsed skill on success", () => {
    mockReadFileSync.mockReturnValue("---\nname: Test\n---\nInstructions");
    mockParseSkillMd.mockReturnValue({
      success: true,
      skill: { name: "Test", instructions: "Instructions" } as any,
      errors: [],
    });
    const result = readAndParseSkillMd("SKILL.md");
    expect(result.name).toBe("Test");
  });

  it("exits when file not found", () => {
    mockReadFileSync.mockImplementation(() => {
      throw new Error("ENOENT");
    });
    const exit = vi.spyOn(process, "exit").mockImplementation(() => {
      throw new Error("exit");
    });
    expect(() => readAndParseSkillMd("missing.md")).toThrow("exit");
    exit.mockRestore();
  });

  it("exits when parsing fails", () => {
    mockReadFileSync.mockReturnValue("bad content");
    mockParseSkillMd.mockReturnValue({
      success: false,
      skill: null,
      errors: [{ field: "name", message: "required" }],
    } as any);
    const exit = vi.spyOn(process, "exit").mockImplementation(() => {
      throw new Error("exit");
    });
    expect(() => readAndParseSkillMd("bad.md")).toThrow("exit");
    exit.mockRestore();
  });
});