import * as fs from "node:fs";
import * as path from "node:path";
import * as os from "node:os";
import { PhaseResearcherAgent } from "../agents/phase-researcher.js";

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

  beforeEach(() => {
    tempDir = fs.mkdtempSync(path.join(os.tmpdir(), "ciagent-phase-researcher-test-"));
    fs.mkdirSync(path.join(tempDir, ".git"), { recursive: true });
  });

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

  it("extracts decisions from commit log content", () => {
    const agent = new PhaseResearcherAgent();
    const result = agent.extractDecisions(
      `some commit\n---ci---\nphase: 1\ndecisions:\n  - D-101: Use SQLite for storage confidence: 0.9\n  - D-102: Retry on failure confidence: 0.3\n---/ci---\n`
    );

    expect(result.length).toBe(2);
    expect(result[0].id).toBe("D-101");
    expect(result[0].confidence).toBe(0.9);
    expect(result[1].id).toBe("D-102");
    expect(result[1].confidence).toBe(0.3);
  });

  it("extracts lessons from commit log content", () => {
    const agent = new PhaseResearcherAgent();
    const result = agent.extractLessons(
      `some commit\n---ci---\nphase: 1\nlessons:\n  - testing: Flaky tests are a problem\n  - build: CI timeouts\n---/ci---\n`
    );

    expect(result.length).toBe(2);
    expect(result[0]).toContain("testing");
  });

  it("identifies risks from low-confidence decisions and repeated lessons", () => {
    const agent = new PhaseResearcherAgent();
    const decisions = [
      { id: "D-1", decision: "Risky choice", confidence: 0.4 },
      { id: "D-2", decision: "Safe choice", confidence: 0.9 },
    ];
    const lessons = [
      "testing: Flaky tests",
      "testing: More flaky tests",
      "build: CI timeouts",
    ];

    const risks = agent.identifyRisks(decisions, lessons);

    const highRisk = risks.filter((r) => r.severity === "high");
    expect(highRisk.length).toBeGreaterThan(0);
    expect(highRisk.some((r) => r.description.includes("D-1"))).toBe(true);
  });

  it("handles empty git log gracefully", () => {
    const agent = new PhaseResearcherAgent();
    const result = agent.mechanicalPhaseResearch(tempDir, 1);

    expect(result.phase).toBe(1);
    expect(result.decisions).toEqual([]);
    expect(result.lessons).toEqual([]);
    expect(result.risks).toEqual([]);
  });

  it("agent name is phase-researcher", () => {
    const agent = new PhaseResearcherAgent();
    expect(agent.name).toBe("phase-researcher");
  });
});