import { act, renderHook } from "@testing-library/react";
import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
import { useShare } from "../../hooks/useShare";
import type { Medication } from "../../types";

describe("useShare", () => {
	let mockAlert: ReturnType<typeof vi.fn>;
	let mockClipboard: { writeText: ReturnType<typeof vi.fn> };

	beforeEach(() => {
		vi.clearAllMocks();
		vi.useFakeTimers();

		mockAlert = vi.fn();
		global.alert = mockAlert;

		mockClipboard = { writeText: vi.fn() };
		Object.defineProperty(navigator, "clipboard", {
			value: mockClipboard,
			writable: true,
		});

		// Mock window.history
		vi.spyOn(window.history, "pushState").mockImplementation(() => {});
		vi.spyOn(window.history, "back").mockImplementation(() => {});

		// Mock window.location.origin
		Object.defineProperty(window, "location", {
			value: { origin: "http://localhost:5173" },
			writable: true,
		});

		(global.fetch as ReturnType<typeof vi.fn>).mockResolvedValue({
			ok: true,
			json: () => Promise.resolve({ token: "test-token" }),
		});
	});

	afterEach(() => {
		vi.useRealTimers();
		vi.restoreAllMocks();
	});

	it("initializes with default state", () => {
		const { result } = renderHook(() => useShare());

		expect(result.current.showShareDialog).toBe(false);
		expect(result.current.sharePeople).toEqual([]);
		expect(result.current.shareSelectedPerson).toBe("");
		expect(result.current.shareSelectedDays).toBe(30);
		expect(result.current.shareLink).toBeNull();
	});

	it("opens share dialog with people from medications", () => {
		const { result } = renderHook(() => useShare());

		const meds: Medication[] = [
			{
				id: 1,
				name: "Med1",
				takenBy: ["Alice", "Bob"],
				packCount: 1,
				blistersPerPack: 1,
				pillsPerBlister: 10,
				looseTablets: 0,
				blisters: [],
				updatedAt: null,
			},
			{
				id: 2,
				name: "Med2",
				takenBy: ["Bob", "Charlie"],
				packCount: 1,
				blistersPerPack: 1,
				pillsPerBlister: 10,
				looseTablets: 0,
				blisters: [],
				updatedAt: null,
			},
		];

		act(() => {
			result.current.openShareDialog(meds);
		});

		expect(result.current.showShareDialog).toBe(true);
		expect(result.current.sharePeople).toEqual(["Alice", "Bob", "Charlie"]);
		expect(result.current.shareSelectedPerson).toBe("Alice");
		expect(window.history.pushState).toHaveBeenCalled();
	});

	it("resets state when opening dialog", () => {
		const { result } = renderHook(() => useShare());

		// Set some state first
		act(() => {
			result.current.setShareLink("old-link");
			result.current.setShareCopied(true);
		});

		const meds: Medication[] = [
			{
				id: 1,
				name: "Med1",
				takenBy: ["Alice"],
				packCount: 1,
				blistersPerPack: 1,
				pillsPerBlister: 10,
				looseTablets: 0,
				blisters: [],
				updatedAt: null,
			},
		];

		act(() => {
			result.current.openShareDialog(meds);
		});

		expect(result.current.shareLink).toBeNull();
		expect(result.current.shareCopied).toBe(false);
	});

	it("generates share link", async () => {
		const { result } = renderHook(() => useShare());

		const meds: Medication[] = [
			{
				id: 1,
				name: "Med1",
				takenBy: ["Alice"],
				packCount: 1,
				blistersPerPack: 1,
				pillsPerBlister: 10,
				looseTablets: 0,
				blisters: [],
				updatedAt: null,
			},
		];

		act(() => {
			result.current.openShareDialog(meds);
		});

		await act(async () => {
			await result.current.generateShareLink();
		});

		expect(fetch).toHaveBeenCalledWith(
			"/api/share",
			expect.objectContaining({
				method: "POST",
				body: JSON.stringify({ takenBy: "Alice", scheduleDays: 30 }),
			})
		);
		expect(result.current.shareLink).toBe("http://localhost:5173/share/test-token");
	});

	it("handles share link generation error", async () => {
		(global.fetch as ReturnType<typeof vi.fn>).mockResolvedValueOnce({
			ok: false,
			json: () => Promise.resolve({ error: "Failed to generate" }),
		});

		const { result } = renderHook(() => useShare());

		const meds: Medication[] = [
			{
				id: 1,
				name: "Med1",
				takenBy: ["Alice"],
				packCount: 1,
				blistersPerPack: 1,
				pillsPerBlister: 10,
				looseTablets: 0,
				blisters: [],
				updatedAt: null,
			},
		];

		act(() => {
			result.current.openShareDialog(meds);
		});

		await act(async () => {
			await result.current.generateShareLink();
		});

		expect(mockAlert).toHaveBeenCalled();
		expect(result.current.shareLink).toBeNull();
	});

	it("handles network error on share link generation", async () => {
		(global.fetch as ReturnType<typeof vi.fn>).mockRejectedValueOnce(new Error("Network error"));

		const { result } = renderHook(() => useShare());

		const meds: Medication[] = [
			{
				id: 1,
				name: "Med1",
				takenBy: ["Alice"],
				packCount: 1,
				blistersPerPack: 1,
				pillsPerBlister: 10,
				looseTablets: 0,
				blisters: [],
				updatedAt: null,
			},
		];

		act(() => {
			result.current.openShareDialog(meds);
		});

		await act(async () => {
			await result.current.generateShareLink();
		});

		expect(mockAlert).toHaveBeenCalled();
	});

	it("does nothing when generateShareLink called without selected person", async () => {
		const { result } = renderHook(() => useShare());

		// Don't open dialog, so shareSelectedPerson is empty
		await act(async () => {
			await result.current.generateShareLink();
		});

		expect(fetch).not.toHaveBeenCalled();
	});

	it("copies share link to clipboard", async () => {
		const { result } = renderHook(() => useShare());

		act(() => {
			result.current.setShareLink("http://localhost:5173/share/test-token");
		});

		act(() => {
			result.current.copyShareLink();
		});

		expect(mockClipboard.writeText).toHaveBeenCalledWith("http://localhost:5173/share/test-token");
		expect(result.current.shareCopied).toBe(true);

		// Should reset after 2 seconds
		act(() => {
			vi.advanceTimersByTime(2000);
		});

		expect(result.current.shareCopied).toBe(false);
	});

	it("does nothing when copyShareLink called without link", () => {
		const { result } = renderHook(() => useShare());

		act(() => {
			result.current.copyShareLink();
		});

		expect(mockClipboard.writeText).not.toHaveBeenCalled();
	});

	it("closes share dialog with history back", () => {
		const { result } = renderHook(() => useShare());

		const meds: Medication[] = [
			{
				id: 1,
				name: "Med1",
				takenBy: ["Alice"],
				packCount: 1,
				blistersPerPack: 1,
				pillsPerBlister: 10,
				looseTablets: 0,
				blisters: [],
				updatedAt: null,
			},
		];

		act(() => {
			result.current.openShareDialog(meds);
		});

		act(() => {
			result.current.closeShareDialog();
		});

		expect(window.history.back).toHaveBeenCalled();
	});

	it("does not call history back when dialog not open", () => {
		const { result } = renderHook(() => useShare());

		act(() => {
			result.current.closeShareDialog();
		});

		expect(window.history.back).not.toHaveBeenCalled();
	});

	it("resetShareDialogState clears state", () => {
		const { result } = renderHook(() => useShare());

		const meds: Medication[] = [
			{
				id: 1,
				name: "Med1",
				takenBy: ["Alice"],
				packCount: 1,
				blistersPerPack: 1,
				pillsPerBlister: 10,
				looseTablets: 0,
				blisters: [],
				updatedAt: null,
			},
		];

		act(() => {
			result.current.openShareDialog(meds);
			result.current.setShareLink("some-link");
			result.current.setShareCopied(true);
		});

		act(() => {
			result.current.resetShareDialogState();
		});

		expect(result.current.showShareDialog).toBe(false);
		expect(result.current.shareLink).toBeNull();
		expect(result.current.shareCopied).toBe(false);
	});

	it("allows changing selected person and days", () => {
		const { result } = renderHook(() => useShare());

		act(() => {
			result.current.setShareSelectedPerson("Bob");
			result.current.setShareSelectedDays(90);
		});

		expect(result.current.shareSelectedPerson).toBe("Bob");
		expect(result.current.shareSelectedDays).toBe(90);
	});
});