import * as fs from "node:fs";
import * as path from "node:path";
import * as os from "node:os";
import { ChallengerAgent } from "../agents/challenger.js";

describe("ChallengerAgent", () => {
  let tempDir: string;

  beforeEach(() => {
    tempDir = fs.mkdtempSync(path.join(os.tmpdir(), "ciagent-challenger-test-"));
  });

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

  it("returns empty for no plan", () => {
    const agent = new ChallengerAgent();
    const issues = agent.mechanicalChallenge(tempDir, "/nonexistent/plan.md");

    expect(issues).toHaveLength(0);
  });

  it("agent name is challenger", () => {
    const agent = new ChallengerAgent();
    expect(agent.name).toBe("challenger");
  });

  it("detects missing must-haves in plan tasks", () => {
    const planDir = path.join(tempDir, ".opencode", "plans");
    fs.mkdirSync(planDir, { recursive: true });
    const planPath = path.join(planDir, "v0.1-plan.md");
    fs.writeFileSync(planPath, `# Plan\n\n| T-01 | 1 | |\n`);

    const agent = new ChallengerAgent();
    const issues = agent.mechanicalChallenge(tempDir, planPath);

    expect(issues.some((i) => i.type === "missing_must_haves")).toBe(true);
  });

  it("validates clean plan with no issues", () => {
    const planDir = path.join(tempDir, ".opencode", "plans");
    fs.mkdirSync(planDir, { recursive: true });
    const planPath = path.join(planDir, "v0.1-plan.md");
    fs.writeFileSync(planPath, `# Plan\n\n| Task | Desc | Wave | Deps | Must-Haves | REQ-ID |\n|------|------|------|------|------------|--------|\n| T-01 | Do X | 1 | none | X works | REQ-01 |\n`);

    const agent = new ChallengerAgent();
    const issues = agent.mechanicalChallenge(tempDir, planPath);

    expect(issues).toHaveLength(0);
  });

  it("detects issue descriptions contain type", () => {
    const agent = new ChallengerAgent();
    expect(agent.name).toBe("challenger");
  });
});