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

import { OpenBrainConfigError, OpenBrainHttpError } from "../src/errors.js";
import { OpenBrainClient } from "../src/openbrain-client.js";

function jsonResponse(body: unknown, init?: ResponseInit): Response {
  return new Response(JSON.stringify(body), {
    status: init?.status ?? 200,
    headers: {
      "content-type": "application/json",
      ...(init?.headers ?? {}),
    },
  });
}

describe("OpenBrainClient", () => {
  it("sends bearer auth and normalized URL for createThought", async () => {
    const fetchMock = vi.fn(async () =>
      jsonResponse({
        id: "thought-1",
        content: "hello",
        source: "openclaw:main",
      }),
    );

    const client = new OpenBrainClient({
      baseUrl: "https://brain.example.com/",
      apiKey: "secret",
      fetchImpl: fetchMock as unknown as typeof fetch,
    });

    await client.createThought({
      content: "hello",
      source: "openclaw:main",
      metadata: { sessionId: "session-1" },
    });

    expect(fetchMock).toHaveBeenCalledTimes(1);
    const firstCall = fetchMock.mock.calls[0];
    expect(firstCall).toBeDefined();
    if (firstCall === undefined) {
      throw new Error("Expected fetch call arguments");
    }
    const [url, init] = firstCall as unknown as [string, RequestInit];
    expect(url).toBe("https://brain.example.com/v1/thoughts");
    expect(init.method).toBe("POST");
    expect(init.headers).toMatchObject({
      Authorization: "Bearer secret",
      "Content-Type": "application/json",
    });
  });

  it("throws OpenBrainHttpError on non-2xx responses", async () => {
    const fetchMock = vi.fn(async () =>
      jsonResponse({ error: "unauthorized" }, { status: 401 }),
    );

    const client = new OpenBrainClient({
      baseUrl: "https://brain.example.com",
      apiKey: "secret",
      fetchImpl: fetchMock as unknown as typeof fetch,
    });

    await expect(client.listRecent({ limit: 5, source: "openclaw:main" })).rejects.toBeInstanceOf(
      OpenBrainHttpError,
    );

    await expect(client.listRecent({ limit: 5, source: "openclaw:main" })).rejects.toMatchObject({
      status: 401,
    });
  });

  it("throws OpenBrainConfigError when initialized without baseUrl or apiKey", () => {
    expect(
      () => new OpenBrainClient({ baseUrl: "", apiKey: "secret", fetchImpl: fetch }),
    ).toThrow(OpenBrainConfigError);
    expect(
      () => new OpenBrainClient({ baseUrl: "https://brain.example.com", apiKey: "", fetchImpl: fetch }),
    ).toThrow(OpenBrainConfigError);
  });
});