/* eslint-disable max-lines-per-function -- Test suites naturally have many cases */
import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";

describe("webhook service", () => {
  const ORIGINAL_ENV = process.env;
  const mockFetch = vi.fn();

  beforeEach(() => {
    process.env = { ...ORIGINAL_ENV };
    vi.resetModules();
    vi.stubGlobal("fetch", mockFetch);
  });

  afterEach(() => {
    process.env = ORIGINAL_ENV;
    vi.unstubAllGlobals();
    mockFetch.mockReset();
  });

  describe("grantApotheosisRole", () => {
    it("does nothing when bot token is missing", async () => {
      delete process.env["DISCORD_BOT_TOKEN"];
      process.env["DISCORD_GUILD_ID"] = "guild123";
      process.env["DISCORD_APOTHEOSIS_ROLE_ID"] = "role123";
      const { grantApotheosisRole } = await import("../../src/services/webhook.js");
      await grantApotheosisRole("user123");
      expect(mockFetch).not.toHaveBeenCalled();
    });

    it("does nothing when guild id is missing", async () => {
      process.env["DISCORD_BOT_TOKEN"] = "token";
      delete process.env["DISCORD_GUILD_ID"];
      process.env["DISCORD_APOTHEOSIS_ROLE_ID"] = "role123";
      const { grantApotheosisRole } = await import("../../src/services/webhook.js");
      await grantApotheosisRole("user123");
      expect(mockFetch).not.toHaveBeenCalled();
    });

    it("does nothing when role id is missing", async () => {
      process.env["DISCORD_BOT_TOKEN"] = "token";
      process.env["DISCORD_GUILD_ID"] = "guild123";
      delete process.env["DISCORD_APOTHEOSIS_ROLE_ID"];
      const { grantApotheosisRole } = await import("../../src/services/webhook.js");
      await grantApotheosisRole("user123");
      expect(mockFetch).not.toHaveBeenCalled();
    });

    it("calls Discord API with correct URL and auth when env vars are set", async () => {
      process.env["DISCORD_BOT_TOKEN"] = "bot_token";
      process.env["DISCORD_GUILD_ID"] = "guild123";
      process.env["DISCORD_APOTHEOSIS_ROLE_ID"] = "role456";
      mockFetch.mockResolvedValueOnce({ ok: true });
      const { grantApotheosisRole } = await import("../../src/services/webhook.js");
      await grantApotheosisRole("user789");
      expect(mockFetch).toHaveBeenCalledWith(
        "https://discord.com/api/v10/guilds/guild123/members/user789/roles/role456",
        expect.objectContaining({
          method: "PUT",
          headers: expect.objectContaining({ Authorization: "Bot bot_token" }),
        }),
      );
    });

    it("swallows fetch errors gracefully", async () => {
      process.env["DISCORD_BOT_TOKEN"] = "tok";
      process.env["DISCORD_GUILD_ID"] = "g";
      process.env["DISCORD_APOTHEOSIS_ROLE_ID"] = "r";
      mockFetch.mockRejectedValueOnce(new Error("Network error"));
      const { grantApotheosisRole } = await import("../../src/services/webhook.js");
      await expect(grantApotheosisRole("user")).resolves.toBeUndefined();
    });

    it("swallows non-Error fetch rejections gracefully", async () => {
      process.env["DISCORD_BOT_TOKEN"] = "tok";
      process.env["DISCORD_GUILD_ID"] = "g";
      process.env["DISCORD_APOTHEOSIS_ROLE_ID"] = "r";
      mockFetch.mockRejectedValueOnce("raw string error");
      const { grantApotheosisRole } = await import("../../src/services/webhook.js");
      await expect(grantApotheosisRole("user")).resolves.toBeUndefined();
    });
  });

  describe("grantElysianRole", () => {
    it("does nothing when bot token is missing", async () => {
      delete process.env["DISCORD_BOT_TOKEN"];
      process.env["DISCORD_GUILD_ID"] = "guild123";
      process.env["DISCORD_ELYSIAN_ROLE_ID"] = "role123";
      const { grantElysianRole } = await import("../../src/services/webhook.js");
      const result = await grantElysianRole("user123");
      expect(mockFetch).not.toHaveBeenCalled();
      expect(result).toBe(false);
    });

    it("does nothing when guild id is missing", async () => {
      process.env["DISCORD_BOT_TOKEN"] = "token";
      delete process.env["DISCORD_GUILD_ID"];
      process.env["DISCORD_ELYSIAN_ROLE_ID"] = "role123";
      const { grantElysianRole } = await import("../../src/services/webhook.js");
      const result = await grantElysianRole("user123");
      expect(mockFetch).not.toHaveBeenCalled();
      expect(result).toBe(false);
    });

    it("returns true when Discord API responds with ok", async () => {
      process.env["DISCORD_BOT_TOKEN"] = "bot_token";
      process.env["DISCORD_GUILD_ID"] = "guild123";
      mockFetch.mockResolvedValueOnce({ ok: true, status: 200 });
      const { grantElysianRole } = await import("../../src/services/webhook.js");
      const result = await grantElysianRole("user789");
      expect(mockFetch).toHaveBeenCalledWith(
        "https://discord.com/api/v10/guilds/guild123/members/user789/roles/1486144823684628490",
        expect.objectContaining({
          method:  "PUT",
          headers: expect.objectContaining({ Authorization: "Bot bot_token" }),
        }),
      );
      expect(result).toBe(true);
    });

    it("returns true when Discord API responds with 204", async () => {
      process.env["DISCORD_BOT_TOKEN"] = "tok";
      process.env["DISCORD_GUILD_ID"] = "g";
      mockFetch.mockResolvedValueOnce({ ok: false, status: 204 });
      const { grantElysianRole } = await import("../../src/services/webhook.js");
      const result = await grantElysianRole("user");
      expect(result).toBe(true);
    });

    it("returns false when Discord API responds with an error status", async () => {
      process.env["DISCORD_BOT_TOKEN"] = "tok";
      process.env["DISCORD_GUILD_ID"] = "g";
      mockFetch.mockResolvedValueOnce({ ok: false, status: 403 });
      const { grantElysianRole } = await import("../../src/services/webhook.js");
      const result = await grantElysianRole("user");
      expect(result).toBe(false);
    });

    it("returns false and swallows fetch errors gracefully", async () => {
      process.env["DISCORD_BOT_TOKEN"] = "tok";
      process.env["DISCORD_GUILD_ID"] = "g";
      mockFetch.mockRejectedValueOnce(new Error("Network error"));
      const { grantElysianRole } = await import("../../src/services/webhook.js");
      const result = await grantElysianRole("user");
      expect(result).toBe(false);
    });

    it("returns false and swallows non-Error fetch rejections", async () => {
      process.env["DISCORD_BOT_TOKEN"] = "tok";
      process.env["DISCORD_GUILD_ID"] = "g";
      mockFetch.mockRejectedValueOnce("raw string error");
      const { grantElysianRole } = await import("../../src/services/webhook.js");
      const result = await grantElysianRole("user");
      expect(result).toBe(false);
    });
  });

  describe("postMilestoneWebhook", () => {
    const counts = { prestige: 1, transcendence: 0, apotheosis: 0 };

    it("does nothing when webhook URL is missing", async () => {
      delete process.env["DISCORD_MILESTONE_WEBHOOK"];
      const { postMilestoneWebhook } = await import("../../src/services/webhook.js");
      await postMilestoneWebhook("user123", "prestige", counts);
      expect(mockFetch).not.toHaveBeenCalled();
    });

    it("posts prestige message with correct body", async () => {
      process.env["DISCORD_MILESTONE_WEBHOOK"] = "https://discord.com/webhook/abc";
      mockFetch.mockResolvedValueOnce({ ok: true });
      const { postMilestoneWebhook } = await import("../../src/services/webhook.js");
      await postMilestoneWebhook("user123", "prestige", counts);
      const [url, options] = mockFetch.mock.calls[0] as [string, RequestInit];
      expect(url).toBe("https://discord.com/webhook/abc");
      const body = JSON.parse(options.body as string) as { content: string; flags: number };
      expect(body.content).toContain("<@user123>");
      expect(body.content).toContain("prestiged");
      expect(body.flags).toBe(4096);
    });

    it("posts transcendence message correctly", async () => {
      process.env["DISCORD_MILESTONE_WEBHOOK"] = "https://discord.com/webhook/abc";
      mockFetch.mockResolvedValueOnce({ ok: true });
      const { postMilestoneWebhook } = await import("../../src/services/webhook.js");
      await postMilestoneWebhook("user123", "transcendence", { prestige: 0, transcendence: 1, apotheosis: 0 });
      const [, options] = mockFetch.mock.calls[0] as [string, RequestInit];
      const body = JSON.parse(options.body as string) as { content: string };
      expect(body.content).toContain("transcended");
    });

    it("posts apotheosis message correctly", async () => {
      process.env["DISCORD_MILESTONE_WEBHOOK"] = "https://discord.com/webhook/abc";
      mockFetch.mockResolvedValueOnce({ ok: true });
      const { postMilestoneWebhook } = await import("../../src/services/webhook.js");
      await postMilestoneWebhook("user123", "apotheosis", { prestige: 0, transcendence: 0, apotheosis: 1 });
      const [, options] = mockFetch.mock.calls[0] as [string, RequestInit];
      const body = JSON.parse(options.body as string) as { content: string };
      expect(body.content).toContain("reached apotheosis");
    });

    it("swallows fetch errors gracefully", async () => {
      process.env["DISCORD_MILESTONE_WEBHOOK"] = "https://discord.com/webhook/abc";
      mockFetch.mockRejectedValueOnce(new Error("Network timeout"));
      const { postMilestoneWebhook } = await import("../../src/services/webhook.js");
      await expect(postMilestoneWebhook("user", "prestige", counts)).resolves.toBeUndefined();
    });

    it("swallows non-Error fetch rejections gracefully", async () => {
      process.env["DISCORD_MILESTONE_WEBHOOK"] = "https://discord.com/webhook/abc";
      mockFetch.mockRejectedValueOnce("raw string error");
      const { postMilestoneWebhook } = await import("../../src/services/webhook.js");
      await expect(postMilestoneWebhook("user", "prestige", counts)).resolves.toBeUndefined();
    });
  });
});