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

const mockSynthesize = vi.fn();

vi.mock("@/lib/graph/investigation-overview-synthesis.js", () => ({
  synthesizeInvestigationOverview: (...args) => mockSynthesize(...args),
}));

vi.mock("@/lib/llm/provider.js", () => ({
  getProvider: () => ({ generateReconstruction() {} }),
  getProviderModelName: () => "gpt-5.6-terra",
}));

describe("POST /api/cases/overview provider routing", () => {
  beforeEach(() => mockSynthesize.mockClear());

  it("passes the central provider and model resolution to overview synthesis", async () => {
    mockSynthesize.mockResolvedValue({ understanding: "Understanding", plausibleInterpretations: "None" });
    const { POST } = await import("@/app/api/cases/overview/route.js");
    const response = await POST(new Request("http://localhost/api/cases/overview", {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ situationGraph: { nodes: [], edges: [] }, findings: [], plausibleInterpretations: [] }),
    }));

    expect(response.status).toBe(200);
    expect(mockSynthesize.mock.calls[0][1]).toMatchObject({ modelName: "gpt-5.6-terra" });
  });
});