// ABOUTME: Unit tests for Garmin tokens API route.
// ABOUTME: Tests POST and DELETE /api/garmin/tokens for token storage and deletion.
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 user with garminConnected: true after update
const mockPbGetOne = vi.fn().mockResolvedValue({ garminConnected: true });

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

// Track encryption calls
const mockEncrypt = vi.fn((plaintext: string) => `encrypted:${plaintext}`);

// Mock encryption module
vi.mock("@/lib/encryption", () => ({
  encrypt: (plaintext: string) => mockEncrypt(plaintext),
}));

// 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 { DELETE, POST } from "./route";

describe("POST /api/garmin/tokens", () => {
  const mockUser: User = {
    id: "user123",
    email: "test@example.com",
    garminConnected: false,
    garminOauth1Token: "",
    garminOauth2Token: "",
    garminTokenExpiresAt: new Date("2025-01-01"),
    garminRefreshTokenExpiresAt: null,
    calendarToken: "cal-secret-token",
    lastPeriodDate: new Date("2025-01-15"),
    cycleLength: 28,
    notificationTime: "07:30",
    timezone: "America/New_York",
    activeOverrides: [],
    intensityGoalMenstrual: 75,
    intensityGoalFollicular: 150,
    intensityGoalOvulation: 100,
    intensityGoalEarlyLuteal: 120,
    intensityGoalLateLuteal: 50,
    created: new Date("2024-01-01"),
    updated: new Date("2025-01-10"),
  };

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

  // 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({
      oauth1: { token: "abc", secret: "xyz" },
      oauth2: { accessToken: "token123" },
      expires_at: "2025-04-01T00:00:00Z",
    });
    const response = await POST(mockRequest);

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

  it("stores encrypted tokens successfully", async () => {
    currentMockUser = mockUser;

    const mockRequest = createMockRequest({
      oauth1: { token: "abc", secret: "xyz" },
      oauth2: { accessToken: "token123" },
      expires_at: "2025-04-01T00:00:00Z",
    });
    const response = await POST(mockRequest);

    expect(response.status).toBe(200);
    const body = await response.json();
    expect(body.success).toBe(true);
    expect(body.garminConnected).toBe(true);
  });

  it("encrypts oauth1 and oauth2 tokens before storing", async () => {
    currentMockUser = mockUser;

    const oauth1 = { token: "abc", secret: "xyz" };
    const oauth2 = { accessToken: "token123" };
    const mockRequest = createMockRequest({
      oauth1,
      oauth2,
      expires_at: "2025-04-01T00:00:00Z",
    });
    await POST(mockRequest);

    // Verify encrypt was called with JSON stringified tokens
    expect(mockEncrypt).toHaveBeenCalledWith(JSON.stringify(oauth1));
    expect(mockEncrypt).toHaveBeenCalledWith(JSON.stringify(oauth2));
  });

  it("updates user record with encrypted tokens and expiry", async () => {
    currentMockUser = mockUser;

    const oauth1 = { token: "abc", secret: "xyz" };
    const oauth2 = { accessToken: "token123" };
    const expiresAt = "2025-04-01T00:00:00Z";

    const mockRequest = createMockRequest({
      oauth1,
      oauth2,
      expires_at: expiresAt,
    });
    await POST(mockRequest);

    expect(mockPbUpdate).toHaveBeenCalledWith("user123", {
      garminOauth1Token: `encrypted:${JSON.stringify(oauth1)}`,
      garminOauth2Token: `encrypted:${JSON.stringify(oauth2)}`,
      garminTokenExpiresAt: expiresAt,
      garminRefreshTokenExpiresAt: expect.any(String),
      garminConnected: true,
    });
  });

  it("returns 400 when oauth1 is missing", async () => {
    currentMockUser = mockUser;

    const mockRequest = createMockRequest({
      oauth2: { accessToken: "token123" },
      expires_at: "2025-04-01T00:00:00Z",
    });
    const response = await POST(mockRequest);

    expect(response.status).toBe(400);
    const body = await response.json();
    expect(body.error).toContain("oauth1");
    expect(mockPbUpdate).not.toHaveBeenCalled();
  });

  it("returns 400 when oauth2 is missing", async () => {
    currentMockUser = mockUser;

    const mockRequest = createMockRequest({
      oauth1: { token: "abc", secret: "xyz" },
      expires_at: "2025-04-01T00:00:00Z",
    });
    const response = await POST(mockRequest);

    expect(response.status).toBe(400);
    const body = await response.json();
    expect(body.error).toContain("oauth2");
    expect(mockPbUpdate).not.toHaveBeenCalled();
  });

  it("returns 400 when expires_at is missing", async () => {
    currentMockUser = mockUser;

    const mockRequest = createMockRequest({
      oauth1: { token: "abc", secret: "xyz" },
      oauth2: { accessToken: "token123" },
    });
    const response = await POST(mockRequest);

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

  it("returns 400 when expires_at is not a valid date", async () => {
    currentMockUser = mockUser;

    const mockRequest = createMockRequest({
      oauth1: { token: "abc", secret: "xyz" },
      oauth2: { accessToken: "token123" },
      expires_at: "not-a-date",
    });
    const response = await POST(mockRequest);

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

  it("returns 400 when oauth1 is not an object", async () => {
    currentMockUser = mockUser;

    const mockRequest = createMockRequest({
      oauth1: "not-an-object",
      oauth2: { accessToken: "token123" },
      expires_at: "2025-04-01T00:00:00Z",
    });
    const response = await POST(mockRequest);

    expect(response.status).toBe(400);
    const body = await response.json();
    expect(body.error).toContain("oauth1");
    expect(mockPbUpdate).not.toHaveBeenCalled();
  });

  it("returns 400 when oauth2 is not an object", async () => {
    currentMockUser = mockUser;

    const mockRequest = createMockRequest({
      oauth1: { token: "abc", secret: "xyz" },
      oauth2: "not-an-object",
      expires_at: "2025-04-01T00:00:00Z",
    });
    const response = await POST(mockRequest);

    expect(response.status).toBe(400);
    const body = await response.json();
    expect(body.error).toContain("oauth2");
    expect(mockPbUpdate).not.toHaveBeenCalled();
  });

  it("returns daysUntilExpiry in response", async () => {
    currentMockUser = mockUser;

    // Set expires_at to 30 days from now
    const futureDate = new Date();
    futureDate.setDate(futureDate.getDate() + 30);

    const mockRequest = createMockRequest({
      oauth1: { token: "abc", secret: "xyz" },
      oauth2: { accessToken: "token123" },
      expires_at: futureDate.toISOString(),
    });
    const response = await POST(mockRequest);

    expect(response.status).toBe(200);
    const body = await response.json();
    expect(body.daysUntilExpiry).toBeGreaterThanOrEqual(29);
    expect(body.daysUntilExpiry).toBeLessThanOrEqual(30);
  });
});

describe("DELETE /api/garmin/tokens", () => {
  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"),
    garminRefreshTokenExpiresAt: null,
    calendarToken: "cal-secret-token",
    lastPeriodDate: new Date("2025-01-15"),
    cycleLength: 28,
    notificationTime: "07:30",
    timezone: "America/New_York",
    activeOverrides: [],
    intensityGoalMenstrual: 75,
    intensityGoalFollicular: 150,
    intensityGoalOvulation: 100,
    intensityGoalEarlyLuteal: 120,
    intensityGoalLateLuteal: 50,
    created: new Date("2024-01-01"),
    updated: new Date("2025-01-10"),
  };

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

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

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

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

  it("clears tokens and sets garminConnected to false", async () => {
    currentMockUser = mockUser;

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

    expect(response.status).toBe(200);
    expect(mockPbUpdate).toHaveBeenCalledWith("user123", {
      garminOauth1Token: "",
      garminOauth2Token: "",
      garminTokenExpiresAt: null,
      garminRefreshTokenExpiresAt: null,
      garminConnected: false,
    });
  });

  it("returns success response after deletion", async () => {
    currentMockUser = mockUser;

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

    expect(response.status).toBe(200);
    const body = await response.json();
    expect(body.success).toBe(true);
    expect(body.garminConnected).toBe(false);
  });

  it("works even when user has no tokens", async () => {
    currentMockUser = {
      ...mockUser,
      garminConnected: false,
      garminOauth1Token: "",
      garminOauth2Token: "",
    };

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

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