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

import { backendBaseUrl, joinBackendPath, resolveBackendUrl } from "./runtime-config";

describe("resolveBackendUrl", () => {
  it("uses same-origin /api by default", () => {
    expect(resolveBackendUrl()).toBe("/api");
  });

  it("does not allow a browser-facing backend override", () => {
    expect(() => resolveBackendUrl("https://api.example.test")).toThrow(/same-origin/i);
  });

  it("keeps the exported browser base on /api", () => {
    expect(backendBaseUrl).toBe("/api");
  });

  it("accepts a same-origin prefixed API base for embedded deployments", () => {
    expect(resolveBackendUrl({ backendBaseUrl: "/embedded/api" })).toBe("/embedded/api");
  });

  it.each(["/backend", "api", "//evil.test", "ftp://example.test", "https://user:pass@example.test"])(
    "rejects any browser-facing backend URL %j",
    (backendBaseUrl) => {
      expect(() => resolveBackendUrl(backendBaseUrl)).toThrow(/same-origin/i);
    },
  );
});

describe("joinBackendPath", () => {
  it.each([
    ["", "/sessions/s1", "/sessions/s1"],
    ["/", "/sessions/s1", "/sessions/s1"],
    ["/api", "/sessions/s1", "/api/sessions/s1"],
    ["/api/", "/sessions/s1", "/api/sessions/s1"],
    ["https://example.test/api", "/sessions/s1", "https://example.test/api/sessions/s1"],
    ["https://example.test/api/", "sessions/s1", "https://example.test/api/sessions/s1"],
  ])("joins base %j and path %j", (base, path, expected) => {
    expect(joinBackendPath(base, path)).toBe(expected);
  });
});