import { describe, expect, it, vi } from "vitest";
import { getGuildMemberIdentity, updateGuildNickname } from "../src/index";

describe("Discord guild identity", () => {
  it("reads the member username, global name, nickname, and immutable ID", async () => {
    const request = vi.fn<typeof fetch>().mockResolvedValue(new Response(JSON.stringify({
      nick: "Sam (Notch)",
      user: { id: "987654321098765432", username: "samcraft", global_name: "Sam" },
    }), { status: 200, headers: { "content-type": "application/json" } }));

    await expect(getGuildMemberIdentity({
      guildId: "123456789012345678",
      discordUserId: "987654321098765432",
      botToken: "secret",
    }, request)).resolves.toEqual({
      id: "987654321098765432",
      username: "samcraft",
      globalName: "Sam",
      nickname: "Sam (Notch)",
    });
  });
});

describe("Discord nickname updates", () => {
  it("updates a member in the configured guild using bot authentication", async () => {
    const request = vi.fn<typeof fetch>().mockResolvedValue(new Response(null, { status: 204 }));

    await updateGuildNickname(
      { guildId: "123456789012345678", discordUserId: "987654321098765432", nickname: "Sam (Notch)", botToken: "secret" },
      request,
    );

    expect(request).toHaveBeenCalledWith(
      "https://discord.com/api/v10/guilds/123456789012345678/members/987654321098765432",
      expect.objectContaining({ method: "PATCH", body: JSON.stringify({ nick: "Sam (Notch)" }) }),
    );
  });

  it("reports Discord permission failures without pretending the nickname changed", async () => {
    const request = vi.fn<typeof fetch>().mockResolvedValue(new Response("Missing Permissions", { status: 403 }));
    await expect(
      updateGuildNickname(
        { guildId: "123456789012345678", discordUserId: "987654321098765432", nickname: "Sam (Notch)", botToken: "secret" },
        request,
      ),
    ).rejects.toThrow("Discord nickname update failed (403)");
  });
});