import { describe, expect, it } from "vitest";
import { adminGroupReturnPath, editableGroupName, effectiveGroupMemberCount, isEffectiveGroupMember, groupSlug, validateGroupDetails } from "./group-management";

describe("group management", () => {
  it("generates a collision-safe internal slug from the display name", () => {
    expect(groupSlug("  Trusted Öps Team!  ", new Set(["trusted-ops-team", "trusted-ops-team-2"])))
      .toBe("trusted-ops-team-3");
    expect(groupSlug("🔥", new Set())).toBe("group");
  });

  it("allows only local Users and group-detail return paths", () => {
    expect(adminGroupReturnPath("/admin/users?q=alex", "saved=group")).toBe("/admin/users?q=alex&saved=group");
    expect(adminGroupReturnPath("/admin/groups/11111111-1111-4111-8111-111111111111", "saved=group"))
      .toBe("/admin/groups/11111111-1111-4111-8111-111111111111?saved=group");
    expect(adminGroupReturnPath("https://evil.example/admin/users", "saved=group")).toBe("/admin/users?saved=group");
    expect(adminGroupReturnPath("/admin/settings", "error=invalid-group-assignment")).toBe("/admin/users?error=invalid-group-assignment");
  });

  it("counts and filters explicit and default effective memberships", () => {
    const assignments = { one: "ops", two: "builders" };
    expect(effectiveGroupMemberCount(4, Object.values(assignments), { id: "everyone", isDefault: true })).toBe(2);
    expect(effectiveGroupMemberCount(4, Object.values(assignments), { id: "ops", isDefault: false })).toBe(1);
    expect(isEffectiveGroupMember("three", assignments, { id: "everyone", isDefault: true })).toBe(true);
    expect(isEffectiveGroupMember("one", assignments, { id: "ops", isDefault: false })).toBe(true);
    expect(isEffectiveGroupMember("two", assignments, { id: "ops", isDefault: false })).toBe(false);
  });

  it("keeps the protected default group name fixed", () => {
    expect(editableGroupName("everyone", true, "Renamed")).toBe("everyone");
    expect(editableGroupName("Ops", false, "Trusted hosts")).toBe("Trusted hosts");
  });

  it("validates and normalizes editable group details", () => {
    expect(validateGroupDetails("  Trusted hosts  ", "  Can use managed VPNs.  ")).toEqual({
      name: "Trusted hosts",
      description: "Can use managed VPNs.",
    });
    expect(validateGroupDetails("", "description")).toBeNull();
    expect(validateGroupDetails("bad\nname", "description")).toBeNull();
    expect(validateGroupDetails("Valid", "x".repeat(501))).toBeNull();
  });
});