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

vi.mock("../../src/db/client.js", () => ({
  prisma: {
    player: { updateMany: vi.fn() },
  },
}));

vi.mock("../../src/services/logger.js", () => ({
  logger: {
    error: vi.fn().mockResolvedValue(undefined),
    log:   vi.fn().mockResolvedValue(undefined),
  },
}));

import { prisma } from "../../src/db/client.js";

describe("gateway service", () => {
  const ORIGINAL_ENV = process.env;

  beforeEach(() => {
    process.env = { ...ORIGINAL_ENV };
    vi.resetAllMocks();
  });

  afterEach(() => {
    process.env = ORIGINAL_ENV;
  });

  describe("handleGuildMemberAdd", () => {
    it("sets inGuild to true for the matching guild", async () => {
      process.env["DISCORD_GUILD_ID"] = "guild123";
      vi.mocked(prisma.player.updateMany).mockResolvedValueOnce({ count: 1 });
      const { handleGuildMemberAdd } = await import("../../src/services/gateway.js");
      await handleGuildMemberAdd("user123", "guild123");
      expect(prisma.player.updateMany).toHaveBeenCalledWith({
        data:  { inGuild: true },
        where: { discordId: "user123" },
      });
    });

    it("no-ops when guild id does not match", async () => {
      process.env["DISCORD_GUILD_ID"] = "guild123";
      const { handleGuildMemberAdd } = await import("../../src/services/gateway.js");
      await handleGuildMemberAdd("user123", "other_guild");
      expect(prisma.player.updateMany).not.toHaveBeenCalled();
    });

    it("no-ops when DISCORD_GUILD_ID env var is missing and guild does not match undefined", async () => {
      delete process.env["DISCORD_GUILD_ID"];
      const { handleGuildMemberAdd } = await import("../../src/services/gateway.js");
      await handleGuildMemberAdd("user123", "guild123");
      expect(prisma.player.updateMany).not.toHaveBeenCalled();
    });

    it("logs error when prisma throws an Error", async () => {
      process.env["DISCORD_GUILD_ID"] = "guild123";
      const dbError = new Error("DB failure");
      vi.mocked(prisma.player.updateMany).mockRejectedValueOnce(dbError);
      const { handleGuildMemberAdd } = await import("../../src/services/gateway.js");
      const { logger } = await import("../../src/services/logger.js");
      await handleGuildMemberAdd("user123", "guild123");
      expect(logger.error).toHaveBeenCalledWith("gateway_member_add", dbError);
    });

    it("logs error when prisma throws a non-Error", async () => {
      process.env["DISCORD_GUILD_ID"] = "guild123";
      vi.mocked(prisma.player.updateMany).mockRejectedValueOnce("raw error");
      const { handleGuildMemberAdd } = await import("../../src/services/gateway.js");
      const { logger } = await import("../../src/services/logger.js");
      await handleGuildMemberAdd("user123", "guild123");
      expect(logger.error).toHaveBeenCalledWith(
        "gateway_member_add",
        new Error("raw error"),
      );
    });
  });

  describe("handleGuildMemberRemove", () => {
    it("sets inGuild to false for the matching guild", async () => {
      process.env["DISCORD_GUILD_ID"] = "guild123";
      vi.mocked(prisma.player.updateMany).mockResolvedValueOnce({ count: 1 });
      const { handleGuildMemberRemove } = await import("../../src/services/gateway.js");
      await handleGuildMemberRemove("user123", "guild123");
      expect(prisma.player.updateMany).toHaveBeenCalledWith({
        data:  { inGuild: false },
        where: { discordId: "user123" },
      });
    });

    it("no-ops when guild id does not match", async () => {
      process.env["DISCORD_GUILD_ID"] = "guild123";
      const { handleGuildMemberRemove } = await import("../../src/services/gateway.js");
      await handleGuildMemberRemove("user123", "other_guild");
      expect(prisma.player.updateMany).not.toHaveBeenCalled();
    });

    it("no-ops when DISCORD_GUILD_ID env var is missing", async () => {
      delete process.env["DISCORD_GUILD_ID"];
      const { handleGuildMemberRemove } = await import("../../src/services/gateway.js");
      await handleGuildMemberRemove("user123", "guild123");
      expect(prisma.player.updateMany).not.toHaveBeenCalled();
    });

    it("logs error when prisma throws an Error", async () => {
      process.env["DISCORD_GUILD_ID"] = "guild123";
      const dbError = new Error("DB failure");
      vi.mocked(prisma.player.updateMany).mockRejectedValueOnce(dbError);
      const { handleGuildMemberRemove } = await import("../../src/services/gateway.js");
      const { logger } = await import("../../src/services/logger.js");
      await handleGuildMemberRemove("user123", "guild123");
      expect(logger.error).toHaveBeenCalledWith("gateway_member_remove", dbError);
    });

    it("logs error when prisma throws a non-Error", async () => {
      process.env["DISCORD_GUILD_ID"] = "guild123";
      vi.mocked(prisma.player.updateMany).mockRejectedValueOnce("raw error");
      const { handleGuildMemberRemove } = await import("../../src/services/gateway.js");
      const { logger } = await import("../../src/services/logger.js");
      await handleGuildMemberRemove("user123", "guild123");
      expect(logger.error).toHaveBeenCalledWith(
        "gateway_member_remove",
        new Error("raw error"),
      );
    });
  });
});