import { SystemRole } from "@capakraken/shared";
import { beforeEach, describe, expect, it, vi } from "vitest";

vi.mock("@capakraken/application", async (importOriginal) => {
  const actual = await importOriginal<typeof import("@capakraken/application")>();
  return {
    ...actual,
    getDashboardOverview: vi.fn(),
    getDashboardPeakTimes: vi.fn(),
    getDashboardDemand: vi.fn(),
    getDashboardTopValueResources: vi.fn(),
    getDashboardChargeabilityOverview: vi.fn(),
  };
});

vi.mock("../lib/cache.js", () => ({
  cacheGet: vi.fn().mockResolvedValue(null),
  cacheSet: vi.fn().mockResolvedValue(undefined),
}));

vi.mock("../lib/anonymization.js", () => ({
  anonymizeResources: vi.fn((resources: unknown[]) => resources),
  getAnonymizationDirectory: vi.fn().mockResolvedValue(null),
}));

import {
  getDashboardOverview,
  getDashboardPeakTimes,
  getDashboardDemand,
  getDashboardTopValueResources,
  getDashboardChargeabilityOverview,
} from "@capakraken/application";
import { dashboardRouter } from "../router/dashboard.js";
import { createCallerFactory } from "../trpc.js";

const createCaller = createCallerFactory(dashboardRouter);

function createProtectedCaller(db: Record<string, unknown>) {
  return createCaller({
    session: {
      user: { email: "user@example.com", name: "User", image: null },
      expires: "2099-01-01T00:00:00.000Z",
    },
    db: db as never,
    dbUser: {
      id: "user_1",
      systemRole: SystemRole.USER,
      permissionOverrides: null,
    },
  });
}

function createControllerCaller(db: Record<string, unknown>) {
  return createCaller({
    session: {
      user: { email: "controller@example.com", name: "Controller", image: null },
      expires: "2099-01-01T00:00:00.000Z",
    },
    db: db as never,
    dbUser: {
      id: "user_2",
      systemRole: SystemRole.CONTROLLER,
      permissionOverrides: null,
    },
  });
}

function createUnauthenticatedCaller(db: Record<string, unknown>) {
  return createCaller({
    session: null,
    db: db as never,
    dbUser: null,
  });
}

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

  // ─── getOverview ──────────────────────────────────────────────────────────

  describe("getOverview", () => {
    it("returns expected shape with resource and project counts", async () => {
      const overview = {
        totalResources: 42,
        activeResources: 38,
        totalProjects: 15,
        activeProjects: 10,
        draftProjects: 3,
        completedProjects: 2,
        totalBudgetCents: 5_000_000_00,
        avgWinProbability: 78,
      };

      vi.mocked(getDashboardOverview).mockResolvedValue(overview);

      const caller = createProtectedCaller({});
      const result = await caller.getOverview();

      expect(result).toMatchObject({
        totalResources: 42,
        activeResources: 38,
        totalProjects: 15,
        activeProjects: 10,
      });
      expect(getDashboardOverview).toHaveBeenCalledTimes(1);
    });

    it("rejects unauthenticated users", async () => {
      const caller = createUnauthenticatedCaller({});
      await expect(caller.getOverview()).rejects.toThrow("Authentication required");
    });
  });

  // ─── getPeakTimes ─────────────────────────────────────────────────────────

  describe("getPeakTimes", () => {
    it("returns array of time periods", async () => {
      const peakData = [
        { period: "2026-03", totalHours: 1200, entries: 15 },
        { period: "2026-04", totalHours: 1400, entries: 18 },
      ];

      vi.mocked(getDashboardPeakTimes).mockResolvedValue(peakData);

      const caller = createProtectedCaller({});
      const result = await caller.getPeakTimes({
        startDate: "2026-03-01T00:00:00.000Z",
        endDate: "2026-06-30T00:00:00.000Z",
        granularity: "month",
        groupBy: "project",
      });

      expect(result).toHaveLength(2);
      expect(result[0]).toHaveProperty("period", "2026-03");
      expect(getDashboardPeakTimes).toHaveBeenCalledWith(
        expect.anything(),
        expect.objectContaining({
          granularity: "month",
          groupBy: "project",
        }),
      );
    });

    it("passes week granularity to application layer", async () => {
      vi.mocked(getDashboardPeakTimes).mockResolvedValue([]);

      const caller = createProtectedCaller({});
      await caller.getPeakTimes({
        startDate: "2026-03-01T00:00:00.000Z",
        endDate: "2026-03-31T00:00:00.000Z",
        granularity: "week",
        groupBy: "chapter",
      });

      expect(getDashboardPeakTimes).toHaveBeenCalledWith(
        expect.anything(),
        expect.objectContaining({
          granularity: "week",
          groupBy: "chapter",
        }),
      );
    });
  });

  // ─── getDemand ────────────────────────────────────────────────────────────

  describe("getDemand", () => {
    it("returns demand entries grouped by project", async () => {
      const demandData = [
        { groupKey: "Project Alpha", totalHours: 500, headcount: 3 },
        { groupKey: "Project Beta", totalHours: 300, headcount: 2 },
      ];

      vi.mocked(getDashboardDemand).mockResolvedValue(demandData);

      const caller = createProtectedCaller({});
      const result = await caller.getDemand({
        startDate: "2026-01-01T00:00:00.000Z",
        endDate: "2026-12-31T00:00:00.000Z",
        groupBy: "project",
      });

      expect(result).toHaveLength(2);
      expect(getDashboardDemand).toHaveBeenCalledWith(
        expect.anything(),
        expect.objectContaining({ groupBy: "project" }),
      );
    });

    it("supports grouping by chapter", async () => {
      vi.mocked(getDashboardDemand).mockResolvedValue([]);

      const caller = createProtectedCaller({});
      await caller.getDemand({
        startDate: "2026-06-01T00:00:00.000Z",
        endDate: "2026-06-30T00:00:00.000Z",
        groupBy: "chapter",
      });

      expect(getDashboardDemand).toHaveBeenCalledWith(
        expect.anything(),
        expect.objectContaining({ groupBy: "chapter" }),
      );
    });
  });

  // ─── getTopValueResources ─────────────────────────────────────────────────

  describe("getTopValueResources", () => {
    it("returns sorted resources with default limit", async () => {
      const resources = [
        { id: "res_1", displayName: "Alice", valueScore: 95 },
        { id: "res_2", displayName: "Bob", valueScore: 88 },
      ];

      vi.mocked(getDashboardTopValueResources).mockResolvedValue(resources);

      const caller = createProtectedCaller({});
      const result = await caller.getTopValueResources({ limit: 10 });

      expect(result).toHaveLength(2);
      expect(getDashboardTopValueResources).toHaveBeenCalledWith(
        expect.anything(),
        expect.objectContaining({ limit: 10 }),
      );
    });

    it("respects custom limit", async () => {
      vi.mocked(getDashboardTopValueResources).mockResolvedValue([]);

      const caller = createProtectedCaller({});
      await caller.getTopValueResources({ limit: 5 });

      expect(getDashboardTopValueResources).toHaveBeenCalledWith(
        expect.anything(),
        expect.objectContaining({ limit: 5 }),
      );
    });
  });

  // ─── getChargeabilityOverview ─────────────────────────────────────────────

  describe("getChargeabilityOverview", () => {
    it("returns chargeability data with top and watchlist arrays", async () => {
      const overview = {
        avgChargeability: 72,
        top: [{ id: "res_1", displayName: "Alice", chargeability: 95 }],
        watchlist: [{ id: "res_3", displayName: "Carol", chargeability: 30 }],
      };

      vi.mocked(getDashboardChargeabilityOverview).mockResolvedValue(overview);

      const caller = createControllerCaller({});
      const result = await caller.getChargeabilityOverview({
        includeProposed: false,
        topN: 10,
        watchlistThreshold: 15,
      });

      expect(result).toHaveProperty("top");
      expect(result).toHaveProperty("watchlist");
      expect(result.top).toHaveLength(1);
      expect(result.watchlist).toHaveLength(1);
    });

    it("passes includeProposed flag to application layer", async () => {
      vi.mocked(getDashboardChargeabilityOverview).mockResolvedValue({
        avgChargeability: 60,
        top: [],
        watchlist: [],
      });

      const caller = createControllerCaller({});
      await caller.getChargeabilityOverview({
        includeProposed: true,
        topN: 5,
        watchlistThreshold: 20,
      });

      expect(getDashboardChargeabilityOverview).toHaveBeenCalledWith(
        expect.anything(),
        expect.objectContaining({
          includeProposed: true,
          topN: 5,
          watchlistThreshold: 20,
        }),
      );
    });

    it("requires controller role — blocks USER", async () => {
      const caller = createProtectedCaller({});
      await expect(
        caller.getChargeabilityOverview({
          includeProposed: false,
          topN: 10,
          watchlistThreshold: 15,
        }),
      ).rejects.toThrow(
        expect.objectContaining({ code: "FORBIDDEN" }),
      );
    });
  });
});