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

// Create mock functions using vi.hoisted so they're available during mock setup
const { mockTrack, mockRevenue } = vi.hoisted(() => ({
  mockTrack: vi.fn().mockResolvedValue(undefined),
  mockRevenue: vi.fn().mockResolvedValue(undefined),
}));

// Mock OpenPanel using factory function
vi.mock("@openpanel/nextjs", () => {
  return {
    OpenPanel: class MockOpenPanel {
      track = mockTrack;
      revenue = mockRevenue;
      constructor() {}
    },
  };
});

// Import after mock is set up
import { AnalyticsService } from "@/lib/services/AnalyticsService";

describe("AnalyticsService", () => {
  beforeEach(() => {
    vi.clearAllMocks();
  });

  describe("trackOrderReceived", () => {
    it("should track order with all details", async () => {
      await new AnalyticsService().trackOrderReceived({
        orderId: "order-123",
        orderNumber: "1524",
        total: 5479,
        currency: "RSD",
        itemCount: 3,
        customerEmail: "test@example.com",
        eventType: "ORDER_CONFIRMED",
      });

      expect(mockTrack).toHaveBeenCalledWith("order_received", {
        order_id: "order-123",
        order_number: "1524",
        total: 5479,
        currency: "RSD",
        item_count: 3,
        customer_email: "test@example.com",
        event_type: "ORDER_CONFIRMED",
      });
    });

    it("should handle large order values", async () => {
      await new AnalyticsService().trackOrderReceived({
        orderId: "order-456",
        orderNumber: "2000",
        total: 500000, // Large amount
        currency: "RSD",
        itemCount: 100,
        customerEmail: "bulk@example.com",
        eventType: "ORDER_CONFIRMED",
      });

      expect(mockTrack).toHaveBeenCalledWith(
        "order_received",
        expect.objectContaining({
          total: 500000,
          item_count: 100,
        })
      );
    });

    it("should not throw if tracking fails", async () => {
      mockTrack.mockRejectedValueOnce(new Error("Network error"));

      await expect(
        new AnalyticsService().trackOrderReceived({
          orderId: "order-123",
          orderNumber: "1524",
          total: 1000,
          currency: "RSD",
          itemCount: 1,
          customerEmail: "test@example.com",
          eventType: "ORDER_CONFIRMED",
        })
      ).resolves.not.toThrow();
    });
  });

  describe("trackRevenue", () => {
    it("should track revenue with correct currency", async () => {
      await new AnalyticsService().trackRevenue({
        amount: 5479,
        currency: "RSD",
        orderId: "order-123",
        orderNumber: "1524",
      });

      expect(mockRevenue).toHaveBeenCalledWith(5479, {
        currency: "RSD",
        order_id: "order-123",
        order_number: "1524",
      });
    });

    it("should track revenue with different currencies", async () => {
      // Test EUR
      await new AnalyticsService().trackRevenue({
        amount: 100,
        currency: "EUR",
        orderId: "order-1",
        orderNumber: "1000",
      });

      expect(mockRevenue).toHaveBeenCalledWith(100, {
        currency: "EUR",
        order_id: "order-1",
        order_number: "1000",
      });

      // Test USD
      await new AnalyticsService().trackRevenue({
        amount: 150,
        currency: "USD",
        orderId: "order-2",
        orderNumber: "1001",
      });

      expect(mockRevenue).toHaveBeenCalledWith(150, {
        currency: "USD",
        order_id: "order-2",
        order_number: "1001",
      });
    });

    it("should log tracking for debugging", async () => {
      const consoleSpy = vi.spyOn(console, "log").mockImplementation(() => {});

      await new AnalyticsService().trackRevenue({
        amount: 5479,
        currency: "RSD",
        orderId: "order-123",
        orderNumber: "1524",
      });

      expect(consoleSpy).toHaveBeenCalledWith(
        "Tracking revenue: 5479 RSD for order 1524"
      );

      consoleSpy.mockRestore();
    });

    it("should not throw if revenue tracking fails", async () => {
      mockRevenue.mockRejectedValueOnce(new Error("API error"));

      await expect(
        new AnalyticsService().trackRevenue({
          amount: 1000,
          currency: "RSD",
          orderId: "order-123",
          orderNumber: "1524",
        })
      ).resolves.not.toThrow();
    });

    it("should handle zero amount orders", async () => {
      await new AnalyticsService().trackRevenue({
        amount: 0,
        currency: "RSD",
        orderId: "order-000",
        orderNumber: "0000",
      });

      expect(mockRevenue).toHaveBeenCalledWith(0, {
        currency: "RSD",
        order_id: "order-000",
        order_number: "0000",
      });
    });
  });

  describe("track", () => {
    it("should track custom events", async () => {
      await new AnalyticsService().track("custom_event", {
        property1: "value1",
        property2: 123,
      });

      expect(mockTrack).toHaveBeenCalledWith("custom_event", {
        property1: "value1",
        property2: 123,
      });
    });

    it("should not throw on tracking errors", async () => {
      mockTrack.mockRejectedValueOnce(new Error("Tracking failed"));

      await expect(
        new AnalyticsService().track("test_event", { test: true })
      ).resolves.not.toThrow();
    });
  });

  describe("Singleton pattern", () => {
    it("should return the same instance", async () => {
      // Import fresh to test singleton using dynamic import
      const { analyticsService: service1 } = await import("@/lib/services/AnalyticsService");
      const { analyticsService: service2 } = await import("@/lib/services/AnalyticsService");

      expect(service1).toBe(service2);
    });
  });

  describe("Error handling", () => {
    it("should log errors but not throw", async () => {
      const consoleErrorSpy = vi.spyOn(console, "error").mockImplementation(() => {});
      mockTrack.mockRejectedValueOnce(new Error("Test error"));

      await new AnalyticsService().trackOrderReceived({
        orderId: "order-123",
        orderNumber: "1524",
        total: 1000,
        currency: "RSD",
        itemCount: 1,
        customerEmail: "test@example.com",
        eventType: "ORDER_CONFIRMED",
      });

      expect(consoleErrorSpy).toHaveBeenCalled();
      expect(consoleErrorSpy.mock.calls[0][0]).toContain("Failed to track order received");

      consoleErrorSpy.mockRestore();
    });
  });
});