// ABOUTME: Unit tests for user profile API route.
// ABOUTME: Tests GET and PATCH /api/user for profile retrieval and updates.
import type { NextRequest } from "next/server";
import { NextResponse } from "next/server";
import { beforeEach, describe, expect, it, vi } from "vitest";

import type { User } from "@/types";

// Module-level variable to control mock user in tests
let currentMockUser: User | null = null;

// Track PocketBase update calls
const mockPbUpdate = vi.fn().mockResolvedValue({});

// Track PocketBase getOne calls - returns the current mock user data
const mockPbGetOne = vi.fn().mockImplementation(() => {
  if (!currentMockUser) {
    throw new Error("User not found");
  }
  return Promise.resolve({
    id: currentMockUser.id,
    email: currentMockUser.email,
    garminConnected: currentMockUser.garminConnected,
    lastPeriodDate: currentMockUser.lastPeriodDate?.toISOString(),
    cycleLength: currentMockUser.cycleLength,
    notificationTime: currentMockUser.notificationTime,
    timezone: currentMockUser.timezone,
    activeOverrides: currentMockUser.activeOverrides,
  });
});

// Create mock PocketBase client
const mockPb = {
  collection: vi.fn(() => ({
    update: mockPbUpdate,
    getOne: mockPbGetOne,
  })),
};

// Mock the auth-middleware module
vi.mock("@/lib/auth-middleware", () => ({
  withAuth: vi.fn((handler) => {
    return async (request: NextRequest) => {
      if (!currentMockUser) {
        return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
      }
      return handler(request, currentMockUser, mockPb);
    };
  }),
}));

import { GET, PATCH } from "./route";

describe("GET /api/user", () => {
  const mockUser: User = {
    id: "user123",
    email: "test@example.com",
    garminConnected: true,
    garminOauth1Token: "encrypted-token-1",
    garminOauth2Token: "encrypted-token-2",
    garminTokenExpiresAt: new Date("2025-06-01"),
    calendarToken: "cal-secret-token",
    lastPeriodDate: new Date("2025-01-15"),
    cycleLength: 28,
    notificationTime: "07:30",
    timezone: "America/New_York",
    activeOverrides: ["flare"],
    created: new Date("2024-01-01"),
    updated: new Date("2025-01-10"),
  };

  beforeEach(() => {
    vi.clearAllMocks();
    currentMockUser = null;
    mockPbUpdate.mockClear();
    mockPbGetOne.mockClear();
  });

  it("returns user profile when authenticated", async () => {
    currentMockUser = mockUser;

    const mockRequest = {} as NextRequest;
    const response = await GET(mockRequest);

    expect(response.status).toBe(200);
    const body = await response.json();

    // Should include these fields
    expect(body.id).toBe("user123");
    expect(body.email).toBe("test@example.com");
    expect(body.garminConnected).toBe(true);
    expect(body.cycleLength).toBe(28);
    expect(body.lastPeriodDate).toBe("2025-01-15");
    expect(body.notificationTime).toBe("07:30");
    expect(body.timezone).toBe("America/New_York");
  });

  it("does not expose sensitive token fields", async () => {
    currentMockUser = mockUser;

    const mockRequest = {} as NextRequest;
    const response = await GET(mockRequest);
    const body = await response.json();

    // Should NOT include encrypted tokens
    expect(body.garminOauth1Token).toBeUndefined();
    expect(body.garminOauth2Token).toBeUndefined();
    expect(body.calendarToken).toBeUndefined();
  });

  it("includes activeOverrides array", async () => {
    currentMockUser = mockUser;

    const mockRequest = {} as NextRequest;
    const response = await GET(mockRequest);
    const body = await response.json();

    expect(body.activeOverrides).toEqual(["flare"]);
  });

  it("returns 401 when not authenticated", async () => {
    currentMockUser = null;

    const mockRequest = {} as NextRequest;
    const response = await GET(mockRequest);

    expect(response.status).toBe(401);
    const body = await response.json();
    expect(body.error).toBe("Unauthorized");
  });
});

describe("PATCH /api/user", () => {
  const mockUser: User = {
    id: "user123",
    email: "test@example.com",
    garminConnected: true,
    garminOauth1Token: "encrypted-token-1",
    garminOauth2Token: "encrypted-token-2",
    garminTokenExpiresAt: new Date("2025-06-01"),
    calendarToken: "cal-secret-token",
    lastPeriodDate: new Date("2025-01-15"),
    cycleLength: 28,
    notificationTime: "07:30",
    timezone: "America/New_York",
    activeOverrides: ["flare"],
    created: new Date("2024-01-01"),
    updated: new Date("2025-01-10"),
  };

  beforeEach(() => {
    vi.clearAllMocks();
    currentMockUser = null;
    mockPbUpdate.mockClear();
    mockPbGetOne.mockClear();
  });

  // Helper to create mock request with JSON body
  function createMockRequest(body: Record<string, unknown>): NextRequest {
    return {
      json: vi.fn().mockResolvedValue(body),
    } as unknown as NextRequest;
  }

  it("returns 401 when not authenticated", async () => {
    currentMockUser = null;

    const mockRequest = createMockRequest({ cycleLength: 30 });
    const response = await PATCH(mockRequest);

    expect(response.status).toBe(401);
    const body = await response.json();
    expect(body.error).toBe("Unauthorized");
  });

  it("updates cycleLength successfully", async () => {
    currentMockUser = mockUser;

    const mockRequest = createMockRequest({ cycleLength: 30 });
    const response = await PATCH(mockRequest);

    expect(response.status).toBe(200);
    const body = await response.json();
    expect(body.cycleLength).toBe(30);
    expect(mockPbUpdate).toHaveBeenCalledWith("user123", { cycleLength: 30 });
  });

  it("updates notificationTime successfully", async () => {
    currentMockUser = mockUser;

    const mockRequest = createMockRequest({ notificationTime: "08:00" });
    const response = await PATCH(mockRequest);

    expect(response.status).toBe(200);
    const body = await response.json();
    expect(body.notificationTime).toBe("08:00");
    expect(mockPbUpdate).toHaveBeenCalledWith("user123", {
      notificationTime: "08:00",
    });
  });

  it("updates timezone successfully", async () => {
    currentMockUser = mockUser;

    const mockRequest = createMockRequest({ timezone: "Europe/London" });
    const response = await PATCH(mockRequest);

    expect(response.status).toBe(200);
    const body = await response.json();
    expect(body.timezone).toBe("Europe/London");
    expect(mockPbUpdate).toHaveBeenCalledWith("user123", {
      timezone: "Europe/London",
    });
  });

  it("updates multiple fields at once", async () => {
    currentMockUser = mockUser;

    const mockRequest = createMockRequest({
      cycleLength: 35,
      notificationTime: "06:00",
      timezone: "Asia/Tokyo",
    });
    const response = await PATCH(mockRequest);

    expect(response.status).toBe(200);
    const body = await response.json();
    expect(body.cycleLength).toBe(35);
    expect(body.notificationTime).toBe("06:00");
    expect(body.timezone).toBe("Asia/Tokyo");
    expect(mockPbUpdate).toHaveBeenCalledWith("user123", {
      cycleLength: 35,
      notificationTime: "06:00",
      timezone: "Asia/Tokyo",
    });
  });

  it("returns 400 when cycleLength is below minimum (21)", async () => {
    currentMockUser = mockUser;

    const mockRequest = createMockRequest({ cycleLength: 20 });
    const response = await PATCH(mockRequest);

    expect(response.status).toBe(400);
    const body = await response.json();
    expect(body.error).toContain("cycleLength");
    expect(mockPbUpdate).not.toHaveBeenCalled();
  });

  it("returns 400 when cycleLength is above maximum (45)", async () => {
    currentMockUser = mockUser;

    const mockRequest = createMockRequest({ cycleLength: 46 });
    const response = await PATCH(mockRequest);

    expect(response.status).toBe(400);
    const body = await response.json();
    expect(body.error).toContain("cycleLength");
    expect(mockPbUpdate).not.toHaveBeenCalled();
  });

  it("returns 400 when cycleLength is not a number", async () => {
    currentMockUser = mockUser;

    const mockRequest = createMockRequest({ cycleLength: "thirty" });
    const response = await PATCH(mockRequest);

    expect(response.status).toBe(400);
    const body = await response.json();
    expect(body.error).toContain("cycleLength");
    expect(mockPbUpdate).not.toHaveBeenCalled();
  });

  it("returns 400 when notificationTime has invalid format", async () => {
    currentMockUser = mockUser;

    const mockRequest = createMockRequest({ notificationTime: "8am" });
    const response = await PATCH(mockRequest);

    expect(response.status).toBe(400);
    const body = await response.json();
    expect(body.error).toContain("notificationTime");
    expect(mockPbUpdate).not.toHaveBeenCalled();
  });

  it("returns 400 when notificationTime has invalid hours", async () => {
    currentMockUser = mockUser;

    const mockRequest = createMockRequest({ notificationTime: "25:00" });
    const response = await PATCH(mockRequest);

    expect(response.status).toBe(400);
    const body = await response.json();
    expect(body.error).toContain("notificationTime");
    expect(mockPbUpdate).not.toHaveBeenCalled();
  });

  it("returns 400 when notificationTime has invalid minutes", async () => {
    currentMockUser = mockUser;

    const mockRequest = createMockRequest({ notificationTime: "12:60" });
    const response = await PATCH(mockRequest);

    expect(response.status).toBe(400);
    const body = await response.json();
    expect(body.error).toContain("notificationTime");
    expect(mockPbUpdate).not.toHaveBeenCalled();
  });

  it("returns 400 when timezone is not a string", async () => {
    currentMockUser = mockUser;

    const mockRequest = createMockRequest({ timezone: 123 });
    const response = await PATCH(mockRequest);

    expect(response.status).toBe(400);
    const body = await response.json();
    expect(body.error).toContain("timezone");
    expect(mockPbUpdate).not.toHaveBeenCalled();
  });

  it("returns 400 when timezone is empty string", async () => {
    currentMockUser = mockUser;

    const mockRequest = createMockRequest({ timezone: "" });
    const response = await PATCH(mockRequest);

    expect(response.status).toBe(400);
    const body = await response.json();
    expect(body.error).toContain("timezone");
    expect(mockPbUpdate).not.toHaveBeenCalled();
  });

  it("returns 400 with empty body", async () => {
    currentMockUser = mockUser;

    const mockRequest = createMockRequest({});
    const response = await PATCH(mockRequest);

    expect(response.status).toBe(400);
    const body = await response.json();
    expect(body.error).toContain("No valid fields");
    expect(mockPbUpdate).not.toHaveBeenCalled();
  });

  it("ignores non-updatable fields like email", async () => {
    currentMockUser = mockUser;

    const mockRequest = createMockRequest({
      email: "hacker@evil.com",
      cycleLength: 30,
    });
    const response = await PATCH(mockRequest);

    expect(response.status).toBe(200);
    const body = await response.json();
    // Email should NOT be changed
    expect(body.email).toBe("test@example.com");
    // Only cycleLength should be in the update
    expect(mockPbUpdate).toHaveBeenCalledWith("user123", { cycleLength: 30 });
  });

  it("ignores attempts to update sensitive fields", async () => {
    currentMockUser = mockUser;

    const mockRequest = createMockRequest({
      garminOauth1Token: "stolen-token",
      calendarToken: "new-calendar-token",
      cycleLength: 30,
    });
    const response = await PATCH(mockRequest);

    expect(response.status).toBe(200);
    // Only cycleLength should be in the update
    expect(mockPbUpdate).toHaveBeenCalledWith("user123", { cycleLength: 30 });
  });

  it("returns updated user profile after successful update", async () => {
    currentMockUser = mockUser;

    const mockRequest = createMockRequest({ cycleLength: 32 });
    const response = await PATCH(mockRequest);

    expect(response.status).toBe(200);
    const body = await response.json();

    // Should return full profile with updated value
    expect(body.id).toBe("user123");
    expect(body.email).toBe("test@example.com");
    expect(body.cycleLength).toBe(32);
    expect(body.notificationTime).toBe("07:30");
    expect(body.timezone).toBe("America/New_York");
    // Should not expose sensitive fields
    expect(body.garminOauth1Token).toBeUndefined();
    expect(body.garminOauth2Token).toBeUndefined();
    expect(body.calendarToken).toBeUndefined();
  });
});