/**
 * Tests Vitest — Authentification locale Itinova Budget SI
 * Couvre : login, logout, me, users.create, etablissements.list
 */
import { describe, expect, it, vi, beforeEach } from "vitest";
import { appRouter } from "./routers";
import { COOKIE_NAME } from "../shared/const";
import type { TrpcContext } from "./_core/context";
import type { User } from "../drizzle/schema";

// ─── Helpers ─────────────────────────────────────────────────────────────────

function makeUser(overrides: Partial<User> = {}): User {
  return {
    id: 1,
    login: "admin",
    email: "admin@itinova.fr",
    passwordHash: "$2a$10$hashedpassword",
    firstName: "Admin",
    lastName: "Itinova",
    role: "admin",
    isActive: true,
    createdAt: new Date(),
    updatedAt: new Date(),
    lastSignedIn: null,
    ...overrides,
  };
}

type CookieCall = { name: string; options: Record<string, unknown> };

function createPublicCtx(): { ctx: TrpcContext; setCookies: CookieCall[]; clearedCookies: CookieCall[] } {
  const setCookies: CookieCall[] = [];
  const clearedCookies: CookieCall[] = [];
  const ctx: TrpcContext = {
    user: null,
    req: { protocol: "https", headers: {} } as TrpcContext["req"],
    res: {
      cookie: (name: string, _val: string, options: Record<string, unknown>) => setCookies.push({ name, options }),
      clearCookie: (name: string, options: Record<string, unknown>) => clearedCookies.push({ name, options }),
    } as unknown as TrpcContext["res"],
  };
  return { ctx, setCookies, clearedCookies };
}

function createAuthCtx(userOverrides: Partial<User> = {}): { ctx: TrpcContext; clearedCookies: CookieCall[] } {
  const clearedCookies: CookieCall[] = [];
  const ctx: TrpcContext = {
    user: makeUser(userOverrides),
    req: { protocol: "https", headers: {} } as TrpcContext["req"],
    res: {
      cookie: () => {},
      clearCookie: (name: string, options: Record<string, unknown>) => clearedCookies.push({ name, options }),
    } as unknown as TrpcContext["res"],
  };
  return { ctx, clearedCookies };
}

// ─── Mock db ─────────────────────────────────────────────────────────────────

vi.mock("./db", async (importOriginal) => {
  const actual = await importOriginal<typeof import("./db")>();
  return {
    ...actual,
    getUserByLogin: vi.fn(),
    updateLastSignedIn: vi.fn(),
    createUser: vi.fn(),
    listUsers: vi.fn(),
    listEtablissements: vi.fn(),
    getParametres: vi.fn(),
    upsertOpexBaseRepartition: vi.fn(),
    setOpexMontantsEtabBatch: vi.fn(),
    deleteOpexPoste: vi.fn(),
    getMasseSalariale: vi.fn(),
    importMasseSalariale: vi.fn(),
    setMasseSalarialeEvolution: vi.fn(),
    getSalairesMensuels: vi.fn(),
  };
});

vi.mock("./_core/sdk", () => ({
  sdk: {
    createSessionToken: vi.fn().mockResolvedValue("mock-jwt-token"),
    authenticateRequest: vi.fn(),
  },
}));

// ─── Tests auth.logout ────────────────────────────────────────────────────────

describe("auth.logout", () => {
  it("efface le cookie de session et retourne success:true", async () => {
    const { ctx, clearedCookies } = createAuthCtx();
    const caller = appRouter.createCaller(ctx);

    const result = await caller.auth.logout();

    expect(result).toEqual({ success: true });
    expect(clearedCookies).toHaveLength(1);
    expect(clearedCookies[0]?.name).toBe(COOKIE_NAME);
    expect(clearedCookies[0]?.options).toMatchObject({
      maxAge: -1,
      httpOnly: true,
      path: "/",
    });
  });

  it("fonctionne aussi sans utilisateur connecté (public procedure)", async () => {
    const { ctx, clearedCookies } = createPublicCtx();
    const caller = appRouter.createCaller(ctx);

    const result = await caller.auth.logout();

    expect(result).toEqual({ success: true });
    expect(clearedCookies).toHaveLength(1);
  });
});

// ─── Tests auth.me ────────────────────────────────────────────────────────────

describe("auth.me", () => {
  it("retourne null si non authentifié", async () => {
    const { ctx } = createPublicCtx();
    const caller = appRouter.createCaller(ctx);

    const result = await caller.auth.me();

    expect(result).toBeNull();
  });

  it("retourne les infos utilisateur si authentifié", async () => {
    const { ctx } = createAuthCtx({ login: "jdupont", email: "j.dupont@itinova.fr", role: "standard" });
    const caller = appRouter.createCaller(ctx);

    const result = await caller.auth.me();

    expect(result).not.toBeNull();
    expect(result?.login).toBe("jdupont");
    expect(result?.email).toBe("j.dupont@itinova.fr");
    expect(result?.role).toBe("standard");
  });

  it("ne retourne pas le hash du mot de passe", async () => {
    const { ctx } = createAuthCtx();
    const caller = appRouter.createCaller(ctx);

    const result = await caller.auth.me();

    expect(result).not.toHaveProperty("passwordHash");
  });
});

// ─── Tests auth.login ────────────────────────────────────────────────────────

describe("auth.login", () => {
  beforeEach(() => {
    vi.clearAllMocks();
  });

  it("refuse un login avec identifiants invalides (utilisateur inexistant)", async () => {
    const { db } = await import("./db").then(m => ({ db: m }));
    (db.getUserByLogin as ReturnType<typeof vi.fn>).mockResolvedValue(null);

    const { ctx } = createPublicCtx();
    const caller = appRouter.createCaller(ctx);

    await expect(caller.auth.login({ login: "inexistant", password: "mauvais" }))
      .rejects.toThrow("Identifiants invalides");
  });

  it("refuse un compte inactif", async () => {
    const { db } = await import("./db").then(m => ({ db: m }));
    (db.getUserByLogin as ReturnType<typeof vi.fn>).mockResolvedValue(
      makeUser({ isActive: false })
    );

    const { ctx } = createPublicCtx();
    const caller = appRouter.createCaller(ctx);

    await expect(caller.auth.login({ login: "admin", password: "password" }))
      .rejects.toThrow("Identifiants invalides");
  });
});

// ─── Tests etablissements.list ────────────────────────────────────────────────

describe("etablissements.list", () => {
  beforeEach(() => {
    vi.clearAllMocks();
  });

  it("retourne la liste des établissements pour un utilisateur connecté", async () => {
    const { db } = await import("./db").then(m => ({ db: m }));
    const mockEtabs = [
      { id: 1, code: "ETB001", nom: "EHPAD Les Pins", groupe: "Itinova", ville: "Lyon", actif: true, createdAt: new Date(), updatedAt: new Date() },
      { id: 2, code: "ETB002", nom: "Résidence Soleil", groupe: "Itinova", ville: "Grenoble", actif: true, createdAt: new Date(), updatedAt: new Date() },
    ];
    (db.listEtablissements as ReturnType<typeof vi.fn>).mockResolvedValue(mockEtabs);

    const { ctx } = createAuthCtx();
    const caller = appRouter.createCaller(ctx);

    const result = await caller.etablissements.list();

    expect(result).toHaveLength(2);
    expect(result[0]?.code).toBe("ETB001");
    expect(result[1]?.code).toBe("ETB002");
  });

  it("lève une erreur UNAUTHORIZED si non authentifié", async () => {
    const { ctx } = createPublicCtx();
    const caller = appRouter.createCaller(ctx);

    await expect(caller.etablissements.list()).rejects.toThrow();
  });
});

// ─── Tests users.list (admin only) ───────────────────────────────────────────

describe("users.list", () => {
  beforeEach(() => {
    vi.clearAllMocks();
  });

  it("retourne la liste des utilisateurs pour un admin", async () => {
    const { db } = await import("./db").then(m => ({ db: m }));
    const mockUsers = [
      makeUser({ id: 1, login: "admin", role: "admin" }),
      makeUser({ id: 2, login: "jdupont", role: "standard" }),
    ];
    (db.listUsers as ReturnType<typeof vi.fn>).mockResolvedValue(mockUsers);

    const { ctx } = createAuthCtx({ role: "admin" });
    const caller = appRouter.createCaller(ctx);

    const result = await caller.users.list();

    expect(result).toHaveLength(2);
    expect(result[0]?.role).toBe("admin");
  });

  it("lève FORBIDDEN pour un utilisateur standard", async () => {
    const { ctx } = createAuthCtx({ role: "standard" });
    const caller = appRouter.createCaller(ctx);

    await expect(caller.users.list()).rejects.toThrow();
  });

  it("lève FORBIDDEN pour un utilisateur readonly", async () => {
    const { ctx } = createAuthCtx({ role: "readonly" });
    const caller = appRouter.createCaller(ctx);

    await expect(caller.users.list()).rejects.toThrow();
  });
});

// ─── Tests parametres.get ─────────────────────────────────────────────────────

describe("parametres.get", () => {
  beforeEach(() => {
    vi.clearAllMocks();
  });

  it("retourne les paramètres sous forme d'objet clé-valeur", async () => {
    const { db } = await import("./db").then(m => ({ db: m }));
    (db.getParametres as ReturnType<typeof vi.fn>).mockResolvedValue([
      { id: 1, cle: "seuil_fixes_ans", valeur: "5", updatedAt: new Date() },
      { id: 2, cle: "cout_fixe", valeur: "850", updatedAt: new Date() },
    ]);

    const { ctx } = createAuthCtx();
    const caller = appRouter.createCaller(ctx);

    const result = await caller.parametres.get();

    expect(result).toEqual({ seuil_fixes_ans: "5", cout_fixe: "850" });
  });
});

// ─── Tests robustesse OPEX ────────────────────────────────────────────────────

describe("opex.setBaseRepartition", () => {
  beforeEach(() => {
    vi.clearAllMocks();
  });

  it("normalise le code établissement avant de l'enregistrer", async () => {
    const { db } = await import("./db").then(m => ({ db: m }));
    const { ctx } = createAuthCtx({ role: "standard" });
    const caller = appRouter.createCaller(ctx);

    await caller.opex.setBaseRepartition({
      annee: 2026,
      etablissementCode: " 1001bpt ",
      etablissementNom: "FAM Saint Joseph",
      baseRepartition: 100,
      baseRepartitionHep: 0,
      modeManuel: false,
    });

    expect(db.upsertOpexBaseRepartition).toHaveBeenCalledWith(expect.objectContaining({
      etablissementCode: "1001BPT",
    }));
  });

  it("rejette les lignes de synthèse avant tout accès à la base", async () => {
    const { db } = await import("./db").then(m => ({ db: m }));
    const { ctx } = createAuthCtx({ role: "standard" });
    const caller = appRouter.createCaller(ctx);

    await expect(caller.opex.setBaseRepartition({
      annee: 2026,
      etablissementCode: "TOTAL",
      baseRepartition: 1,
      baseRepartitionHep: 0,
      modeManuel: false,
    })).rejects.toThrow("Code établissement OPEX invalide");
    expect(db.upsertOpexBaseRepartition).not.toHaveBeenCalled();
  });

  it("interdit toute écriture au profil readonly", async () => {
    const { ctx } = createAuthCtx({ role: "readonly" });
    const caller = appRouter.createCaller(ctx);

    await expect(caller.opex.setBaseRepartition({
      annee: 2026,
      etablissementCode: "1001BPT",
      baseRepartition: 1,
      baseRepartitionHep: 0,
      modeManuel: false,
    })).rejects.toThrow("Accès en lecture seule");
  });
});

describe("opex.deletePoste", () => {
  beforeEach(() => {
    vi.clearAllMocks();
  });

  it("supprime un poste et renvoie le résultat de la transaction métier", async () => {
    const { db } = await import("./db").then(m => ({ db: m }));
    (db.deleteOpexPoste as ReturnType<typeof vi.fn>).mockResolvedValue(true);
    const { ctx } = createAuthCtx({ role: "standard" });
    const caller = appRouter.createCaller(ctx);

    await expect(caller.opex.deletePoste({ annee: 2027, id: 42 })).resolves.toEqual({ success: true });
    expect(db.deleteOpexPoste).toHaveBeenCalledWith(2027, 42);
  });
});

// ─── Tests Masse salariale (données sensibles, administrateur uniquement) ─────

describe("masseSalariale", () => {
  beforeEach(() => {
    vi.clearAllMocks();
  });

  it("retourne les données uniquement pour un administrateur", async () => {
    const { db } = await import("./db").then(m => ({ db: m }));
    const source = { salaries: [], remunerations: [], evolutions: [] };
    (db.getMasseSalariale as ReturnType<typeof vi.fn>).mockResolvedValue(source);
    const { ctx } = createAuthCtx({ role: "admin" });

    await expect(appRouter.createCaller(ctx).masseSalariale.get()).resolves.toEqual(source);
  });

  it("interdit la consultation à un profil standard", async () => {
    const { ctx } = createAuthCtx({ role: "standard" });

    await expect(appRouter.createCaller(ctx).masseSalariale.get()).rejects.toThrow();
  });

  it("importe les données validées uniquement pour un administrateur", async () => {
    const { db } = await import("./db").then(m => ({ db: m }));
    (db.importMasseSalariale as ReturnType<typeof vi.fn>).mockResolvedValue({ salaries: 1, remunerations: 1 });
    const { ctx } = createAuthCtx({ role: "admin" });
    const salaries = [{
      matricule: "000001",
      nom: "DUPONT",
      prenom: "Alice",
      poste: "Responsable administratif",
      dateEmbauche: "2024-01-01",
    }];
    const remunerations = [{
      matricule: "000001",
      annee: 2026,
      salaireAnnuelBrutHorsPrimesCents: 36_000_00,
      salaireAnnuelBrutAvecPrimesCents: 40_000_00,
      salaireMensuelBrutHorsPrimesCents: 3_000_00,
      tauxChargeBps: 5_500,
      periodeReference: "2026-08",
      statut: "cumul_provisoire" as const,
      source: "bulletin",
    }];

    await expect(appRouter.createCaller(ctx).masseSalariale.import({ salaries, remunerations }))
      .resolves.toEqual({ salaries: 1, remunerations: 1 });
    expect(db.importMasseSalariale).toHaveBeenCalledWith(salaries, remunerations);
  });

  it("interdit l'import de rémunérations à un profil standard", async () => {
    const { db } = await import("./db").then(m => ({ db: m }));
    const { ctx } = createAuthCtx({ role: "standard" });

    await expect(appRouter.createCaller(ctx).masseSalariale.import({ salaries: [], remunerations: [] })).rejects.toThrow();
    expect(db.importMasseSalariale).not.toHaveBeenCalled();
  });

  it("enregistre l'évolution manuelle avec l'identifiant de l'administrateur", async () => {
    const { db } = await import("./db").then(m => ({ db: m }));
    const { ctx } = createAuthCtx({ id: 42, role: "admin" });

    await expect(appRouter.createCaller(ctx).masseSalariale.setEvolution({
      salarieId: 7,
      annee: 2027,
      evolutionSalarialeBps: 250,
    })).resolves.toEqual({ success: true });

    expect(db.setMasseSalarialeEvolution).toHaveBeenCalledWith({
      salarieId: 7,
      annee: 2027,
      evolutionSalarialeBps: 250,
      createdBy: 42,
    });
  });

  it("rejette un taux d'évolution hors plage avant l'accès à la base", async () => {
    const { db } = await import("./db").then(m => ({ db: m }));
    const { ctx } = createAuthCtx({ role: "admin" });

    await expect(appRouter.createCaller(ctx).masseSalariale.setEvolution({
      salarieId: 7,
      annee: 2027,
      evolutionSalarialeBps: 10_001,
    })).rejects.toThrow();
    expect(db.setMasseSalarialeEvolution).not.toHaveBeenCalled();
  });
});

// ─── Tests Salaires : sonde de chiffrement et confidentialité ─────────────────

describe("salaires.getSecurityStatus", () => {
  it("valide la clé de chiffrement configurée via une procédure administrateur", async () => {
    const { ctx } = createAuthCtx({ role: "admin" });
    const previousKey = process.env.PAYROLL_ENCRYPTION_KEY;
    process.env.PAYROLL_ENCRYPTION_KEY = Buffer.alloc(32, 9).toString("base64");
    try {
      await expect(appRouter.createCaller(ctx).salaires.getSecurityStatus())
        .resolves.toEqual({ ready: true, algorithm: "AES-256-GCM" });
    } finally {
      if (previousKey === undefined) delete process.env.PAYROLL_ENCRYPTION_KEY;
      else process.env.PAYROLL_ENCRYPTION_KEY = previousKey;
    }
  });

  it("interdit la sonde de sécurité aux profils non administrateurs", async () => {
    const { ctx } = createAuthCtx({ role: "standard" });

    await expect(appRouter.createCaller(ctx).salaires.getSecurityStatus()).rejects.toThrow();
  });
});

describe("salaires.list", () => {
  beforeEach(() => {
    vi.clearAllMocks();
  });

  it("retourne l'index métier et explique la variation uniquement à l'administrateur", async () => {
    const { db } = await import("./db").then(m => ({ db: m }));
    const mayLiasse = {
      id: 9, annee: 2026, mois: 5, nomFichier: "mai.pdf", stockageKey: "secret-key",
      empreinteSha256: "a".repeat(64), tailleOctets: 1200, ivBase64: "iv", authTagBase64: "tag",
      versionCle: 1, statutExtraction: "ready", erreurExtraction: null, importePar: 1, importeLe: new Date(),
    };
    const juneLiasse = { ...mayLiasse, id: 10, mois: 6, nomFichier: "juin.pdf", stockageKey: "secret-key-2" };
    const mayBulletin = {
      id: 1, liasseId: 9, matricule: "000001", nom: "DUPONT", prenom: "TEST", poste: "Responsable",
      brutMensuelCents: 300000, brutAvecPrimesCents: 320000, primeAstreinteCents: 20000,
      explicationEcart: null, numeroPage: 1, createdAt: new Date(), updatedAt: new Date(),
    };
    const juneBulletin = { ...mayBulletin, id: 2, liasseId: 10, brutAvecPrimesCents: 350000, primeAstreinteCents: 40000 };
    (db.getSalairesMensuels as ReturnType<typeof vi.fn>).mockResolvedValue({
      liasses: [juneLiasse, mayLiasse],
      rows: [{ liasse: juneLiasse, bulletin: juneBulletin }, { liasse: mayLiasse, bulletin: mayBulletin }],
    });

    const { ctx } = createAuthCtx({ role: "admin" });
    const result = await appRouter.createCaller(ctx).salaires.list({ annee: 2026, mois: 6 });

    expect(result.indicateurs).toEqual({ nombreSalaries: 1, totalBrutCents: 350000, totalEcartCents: 30000 });
    expect(result.bulletins[0]).toMatchObject({ ecartBrutCents: 30000, brutPrecedentCents: 320000 });
    expect(result.bulletins[0]?.explication).toContain("astreintes");
    expect(JSON.stringify(result)).not.toContain("secret-key");
    expect(JSON.stringify(result)).not.toContain("empreinteSha256");
    expect(result.liasses[0]?.pdfPath).toBe("/api/salaires/liasses/10/pdf");
  });

  it("interdit l'index salarial aux profils standard et lecture seule", async () => {
    const standard = createAuthCtx({ role: "standard" });
    const readonly = createAuthCtx({ role: "readonly" });

    await expect(appRouter.createCaller(standard.ctx).salaires.list({})).rejects.toThrow();
    await expect(appRouter.createCaller(readonly.ctx).salaires.list({})).rejects.toThrow();
  });

  it("rejette un mois invalide avant tout accès aux données", async () => {
    const { db } = await import("./db").then(m => ({ db: m }));
    const { ctx } = createAuthCtx({ role: "admin" });

    await expect(appRouter.createCaller(ctx).salaires.list({ mois: 13 })).rejects.toThrow();
    expect(db.getSalairesMensuels).not.toHaveBeenCalled();
  });
});