import { fireEvent, screen } from "@testing-library/react";
import { beforeEach, describe, expect, it, vi } from "vitest";
import type { DashboardRangeKey } from "@/domain/dashboard/types/dashboard-range";
import { renderWithProviders } from "@/test/test-utils";

const navigate = vi.fn();
const statsRange = vi.fn<(range: DashboardRangeKey) => void>();

vi.mock("react-router", async (importOriginal) => ({
  ...(await importOriginal<typeof import("react-router")>()),
  useNavigate: () => navigate,
}));

vi.mock("@/domain/dashboard/use-cases/use-dashboard-workload", () => ({
  useDashboardWorkload: () => ({ data: [], isLoading: false, isFetching: false, error: null }),
}));

vi.mock("@/domain/dashboard/use-cases/use-dashboard-performance", () => ({
  useDashboardPerformance: () => ({ data: [], isLoading: false, isFetching: false, error: null }),
}));

vi.mock("@/domain/dashboard/use-cases/use-dashboard-regions", () => ({
  useDashboardRegions: () => ({ data: [], isLoading: false, isFetching: false, error: null }),
}));

vi.mock("@/domain/dashboard/use-cases/use-dashboard-vendor-insights", () => ({
  useDashboardVendorInsights: () => ({
    data: [],
    isLoading: false,
    isFetching: false,
    error: null,
  }),
}));

vi.mock("@/domain/dashboard/use-cases/use-dashboard-trend", () => ({
  useDashboardTrend: () => ({
    data: { granularity: null, points: [] },
    isLoading: false,
    isFetching: false,
    error: null,
  }),
}));

const statsData = {
  scheduledTomorrow: 3,
  pendingUplifts: 5,
  avetaPending: 0,
  breakdown: [
    { status: "PM", count: 7 },
    { status: "Completed", count: 0 },
  ],
};

vi.mock("@/domain/dashboard/use-cases/use-dashboard-stats", () => ({
  useDashboardStats: (range: DashboardRangeKey) => {
    statsRange(range);
    return { data: statsData, isLoading: false, isFetching: false, error: null };
  },
}));

import DashboardPage from "@/app/(protected)/dashboard";
import {
  avetaPendingDrilldownSearch,
  scheduledTomorrowDrilldownSearch,
} from "@/domain/dashboard/utils/work-order-drilldown-links";
import { addDaysIso, businessTodayIso } from "@/domain/dashboard/utils/dashboard-range-utils";

function renderDashboard() {
  return renderWithProviders(<DashboardPage />);
}

describe("DashboardPage", () => {
  beforeEach(() => {
    navigate.mockReset();
    statsRange.mockReset();
  });

  it("renders the prototype title, range options, and card titles", () => {
    renderDashboard();

    expect(screen.getByRole("heading", { name: "Dashboard" })).toBeInTheDocument();
    for (const label of ["This week", "Last 3 months", "Today", "All time"]) {
      expect(screen.getByRole("button", { name: label })).toBeInTheDocument();
    }
    for (const title of [
      "Scheduled Tomorrow",
      "Pending Uplifts",
      "Aveta Pending",
      "Work Order Breakdown",
      "Dispatcher Workload",
      "Dispatcher Performance",
      "Work Orders by Region",
      "Vendor Insights",
    ]) {
      expect(screen.getByText(title)).toBeInTheDocument();
    }
    expect(statsRange).toHaveBeenCalledWith("this-week");
  });

  it("exposes positive KPI cards as keyboard-accessible drill-downs", () => {
    renderDashboard();

    const tomorrowCard = screen.getByRole("button", { name: /Scheduled Tomorrow/ });
    expect(tomorrowCard).toBeInTheDocument();
    fireEvent.click(tomorrowCard);

    const today = businessTodayIso();
    expect(navigate).toHaveBeenCalledWith(
      `/workorders?${scheduledTomorrowDrilldownSearch(today).toString()}`,
    );

    fireEvent.click(screen.getByRole("button", { name: /Pending Uplifts/ }));
    expect(navigate).toHaveBeenCalledWith("/uplifts");
  });

  it("keeps zero counts inert", () => {
    renderDashboard();

    expect(screen.queryByRole("button", { name: /Aveta Pending/ })).toBeNull();

    fireEvent.click(screen.getByText("Aveta Pending"));
    expect(navigate).not.toHaveBeenCalled();

    const inertRow = screen.getByText("Completed");
    fireEvent.click(inertRow);
    expect(navigate).not.toHaveBeenCalled();
  });

  it("drills the breakdown status into filtered work orders", () => {
    renderDashboard();

    fireEvent.click(screen.getByText("PM"));

    const calls = navigate.mock.calls;
    const [url] = calls[calls.length - 1] ?? [];
    expect(String(url)).toContain("/workorders?");
    expect(String(url)).toContain("types=PM");
  });

  it("switches the stats range from the toggle", () => {
    renderDashboard();

    fireEvent.click(screen.getByRole("button", { name: "Today" }));

    expect(statsRange).toHaveBeenCalledWith("today");
  });

  it("shows the documented empty states when datasets are empty", () => {
    renderDashboard();

    // Breakdown and Trend share this empty copy, so both cards surface it.
    expect(screen.getAllByText("No work orders match the current filters.")).toHaveLength(2);
    expect(screen.getAllByText("No dispatchers are set up yet.")).toHaveLength(2);
    expect(screen.getByText("No active vendor has any work orders yet.")).toBeInTheDocument();
  });

  it("keeps drilldown dates deterministic on the business clock", () => {
    const today = businessTodayIso();

    expect(scheduledTomorrowDrilldownSearch(today).get("dateFrom")).toBe(addDaysIso(today, 1));
    expect(avetaPendingDrilldownSearch(today).get("aveta")).toBe("1");
  });
});