import { describe, it, expect, vi } from "vitest";
import Fastify from "fastify";
import { envSchema } from "@siax/c0py-config";
import { createIntrospector } from "../src/auth/introspection.js";
import type { IntrospectionDeps } from "../src/auth/introspection.js";

const env = envSchema.parse({
  CL0UD_BASE_URL: "https://cl0ud.siax.io",
  ZITADEL_ISSUER: "https://id-customers.siax.io",
  ZITADEL_AUDIENCE: "c0py-api.siax.io",
  DATABASE_URL: "postgresql://localhost:5432/c0py",
  ZITADEL_INTROSPECTION_CLIENT_ID: "cid",
  ZITADEL_INTROSPECTION_CLIENT_SECRET: "csec",
  ZITADEL_EXPECTED_AUDIENCE: "proj-1",
  NODE_ENV: "test",
});

function mockIntrospect(body: unknown) {
  return vi.fn().mockResolvedValue(body);
}

function buildApp(introspectImpl: (token: string) => Promise<unknown>) {
  const server = Fastify({ logger: false });
  server.get("/health", async () => ({ status: "ok" }));
  server.addHook("preHandler", async (request, reply) => {
    if (request.url === "/health") return;
    const auth = request.headers.authorization;
    if (!auth || !auth.startsWith("Bearer ")) {
      await reply.code(401).send({ error: "Unauthorized" });
      return;
    }
    const result = (await introspectImpl(auth.slice("Bearer ".length).trim())) as {
      active: boolean;
      sub?: string;
    };
    if (!result.active) {
      await reply.code(401).send({ error: "Unauthorized" });
      return;
    }
    (request as never as { user?: { sub?: string } }).user = { sub: result.sub };
  });
  server.get("/v1/c0py/registries", async (request) => ({
    user: (request as never as { user?: { sub?: string } }).user,
  }));
  return server;
}

describe("preHandler auth (fail-closed)", () => {
  it("401 without Bearer", async () => {
    const app = buildApp(mockIntrospect({ active: true }));
    const res = await app.inject({ method: "GET", url: "/v1/c0py/registries" });
    expect(res.statusCode).toBe(401);
  });

  it("exempts /health", async () => {
    const app = buildApp(mockIntrospect({ active: false }));
    const res = await app.inject({ method: "GET", url: "/health" });
    expect(res.statusCode).toBe(200);
  });

  it("401 when introspection denies", async () => {
    const app = buildApp(mockIntrospect({ active: false, reason: "audience_mismatch" }));
    const res = await app.inject({
      method: "GET",
      url: "/v1/c0py/registries",
      headers: { Authorization: "Bearer tok" },
    });
    expect(res.statusCode).toBe(401);
  });

  it("200 with valid token and sub propagated", async () => {
    const app = buildApp(mockIntrospect({ active: true, sub: "svc-user" }));
    const res = await app.inject({
      method: "GET",
      url: "/v1/c0py/registries",
      headers: { Authorization: "Bearer tok" },
    });
    expect(res.statusCode).toBe(200);
    expect(res.json()).toEqual({ user: { sub: "svc-user" } });
  });

  it("env schema accepts new introspection vars", () => {
    expect(env.ZITADEL_INTROSPECTION_CLIENT_ID).toBe("cid");
    expect(env.ZITADEL_EXPECTED_AUDIENCE).toBe("proj-1");
  });

  it("createIntrospector is importable and typed", async () => {
    expect(typeof createIntrospector).toBe("function");
  });
});