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

// Validation pure (pas de fetch).

describe("presentationController.validateReponses", () => {
  beforeEach(() => {
    vi.resetModules();
  });

  it("accepte les 5 champs requis non vides", async () => {
    const { validateReponses } = await import("../presentationController");
    const result = validateReponses({
      prenom_age_ville: "Pierre, 30 ans, Alger",
      formation_metier: "Ingénieur",
      situation_familiale: "Marié, deux enfants",
      loisirs: "Lecture, randonnée",
      motivation_canada: "Opportunités professionnelles",
    });
    expect("ok" in result && result.ok).toBe(true);
  });

  it("rejette si reponses non objet", async () => {
    const { validateReponses } = await import("../presentationController");
    const result = validateReponses("string");
    expect("error" in result).toBe(true);
    if ("error" in result) expect(result.code).toBe("VALIDATION_ERROR");
  });

  it.each([
    "prenom_age_ville",
    "formation_metier",
    "situation_familiale",
    "loisirs",
    "motivation_canada",
  ])("rejette si %s manquant", async (field) => {
    const { validateReponses } = await import("../presentationController");
    const all: Record<string, string> = {
      prenom_age_ville: "a",
      formation_metier: "b",
      situation_familiale: "c",
      loisirs: "d",
      motivation_canada: "e",
    };
    delete all[field];
    const result = validateReponses(all);
    expect("error" in result).toBe(true);
  });

  it("rejette les champs vides ou whitespace", async () => {
    const { validateReponses } = await import("../presentationController");
    const result = validateReponses({
      prenom_age_ville: "  ",
      formation_metier: "b",
      situation_familiale: "c",
      loisirs: "d",
      motivation_canada: "e",
    });
    expect("error" in result).toBe(true);
  });
});

// Pipeline complet — fetch mocké.

describe("presentationController.generate", () => {
  beforeEach(() => {
    vi.resetModules();
    vi.restoreAllMocks();
  });

  const VALID_REPONSES = {
    prenom_age_ville: "Pierre, 30 ans, Alger",
    formation_metier: "Ingénieur",
    situation_familiale: "Marié",
    loisirs: "Lecture",
    motivation_canada: "Travail",
  };

  it("succès → renvoie { presentation: string }", async () => {
    vi.stubGlobal(
      "fetch",
      vi.fn().mockResolvedValue({
        ok: true,
        json: async () => ({
          choices: [
            { message: { content: "Bonjour, je m'appelle Pierre. Voilà." } },
          ],
        }),
      }),
    );

    const { generate } = await import("../presentationController");
    const result = await generate(VALID_REPONSES);

    expect("data" in result).toBe(true);
    if ("data" in result) {
      expect(result.data.presentation).toContain("Pierre");
    }
  });

  it("DeepSeek non-OK → INTERNAL_ERROR 500", async () => {
    vi.stubGlobal(
      "fetch",
      vi.fn().mockResolvedValue({ ok: false, status: 500, statusText: "I" }),
    );

    const { generate } = await import("../presentationController");
    const result = await generate(VALID_REPONSES);

    expect("error" in result).toBe(true);
    if ("error" in result) {
      expect(result.code).toBe("INTERNAL_ERROR");
      expect(result.status).toBe(500);
    }
  });

  it("réponse vide → INTERNAL_ERROR 500", async () => {
    vi.stubGlobal(
      "fetch",
      vi.fn().mockResolvedValue({
        ok: true,
        json: async () => ({ choices: [{ message: { content: "" } }] }),
      }),
    );
    const { generate } = await import("../presentationController");
    const result = await generate(VALID_REPONSES);
    expect("error" in result).toBe(true);
  });

  it("fetch throw (timeout) → INTERNAL_ERROR 500", async () => {
    vi.stubGlobal(
      "fetch",
      vi.fn().mockRejectedValue(new Error("network down")),
    );
    const { generate } = await import("../presentationController");
    const result = await generate(VALID_REPONSES);
    expect("error" in result).toBe(true);
    if ("error" in result) expect(result.code).toBe("INTERNAL_ERROR");
  });

  it("rejette les body invalides en court-circuitant fetch", async () => {
    const fetchSpy = vi.fn();
    vi.stubGlobal("fetch", fetchSpy);
    const { generate } = await import("../presentationController");
    const result = await generate({ prenom_age_ville: "" });
    expect("error" in result).toBe(true);
    expect(fetchSpy).not.toHaveBeenCalled();
  });
});