import { describe, it, expect, vi, beforeEach } from 'vitest';

vi.mock('$env/dynamic/private', () => ({
	env: { BACKEND_URL: 'http://localhost:8080' }
}));

const mockPost = vi.fn();
vi.mock('$lib/server/api', () => ({
	apiClient: () => ({ POST: mockPost })
}));

describe('household setup — load', () => {
	let load: any;

	beforeEach(async () => {
		const mod = await import('./+page.server');
		load = mod.load;
	});

	it('redirects to /planner when user already has a household', async () => {
		const event = {
			locals: {
				benutzer: { id: '1', name: 'Sarah', rolle: 'planer' },
				haushalt: { id: 'household-123', name: 'Smith family' }
			}
		} as any;

		try {
			await load(event);
			expect.unreachable();
		} catch (e: any) {
			expect(e.status).toBe(303);
			expect(e.location).toBe('/planner');
		}
	});

	it('allows access when user has no household', async () => {
		const event = {
			locals: {
				benutzer: { id: '1', name: 'Sarah', rolle: 'planer' },
				haushalt: { id: undefined, name: 'Kein Haushalt' }
			}
		} as any;

		const result = await load(event);
		expect(result).toBeDefined();
	});
});

describe('household setup — form action', () => {
	let actions: any;

	beforeEach(async () => {
		mockPost.mockReset();
		const mod = await import('./+page.server');
		actions = mod.actions;
	});

	function createRequest(formData: Record<string, string>) {
		const fd = new FormData();
		for (const [key, value] of Object.entries(formData)) {
			fd.append(key, value);
		}
		return {
			request: { formData: () => Promise.resolve(fd) },
			fetch: vi.fn(),
			cookies: { get: vi.fn(), set: vi.fn() }
		} as any;
	}

	function mockSuccess() {
		return {
			data: { data: { id: 'hh-123', name: 'Smith family', members: [] } },
			error: undefined
		};
	}

	it('calls POST /v1/households with the household name', async () => {
		mockPost.mockResolvedValue(mockSuccess());

		try {
			await actions.default(createRequest({ name: 'Smith family' }));
		} catch {
			// redirect throws
		}

		expect(mockPost).toHaveBeenCalledWith('/v1/households', {
			body: { name: 'Smith family' }
		});
	});

	it('redirects to /household/staples on success', async () => {
		mockPost.mockResolvedValue(mockSuccess());

		try {
			await actions.default(createRequest({ name: 'Smith family' }));
			expect.unreachable();
		} catch (e: any) {
			expect(e.status).toBe(303);
			expect(e.location).toBe('/household/staples?ctx=onboarding');
		}
	});

	it('returns fail(400) when name is empty', async () => {
		const result = await actions.default(createRequest({ name: '' }));

		expect(result.status).toBe(400);
		expect(result.data.errors.name).toBeTruthy();
		expect(mockPost).not.toHaveBeenCalled();
	});

	it('returns fail(400) when name is whitespace only', async () => {
		const result = await actions.default(createRequest({ name: '   ' }));

		expect(result.status).toBe(400);
		expect(result.data.errors.name).toBeTruthy();
		expect(mockPost).not.toHaveBeenCalled();
	});

	it('echoes name back on validation error', async () => {
		const result = await actions.default(createRequest({ name: '' }));
		expect(result.data.name).toBe('');
	});

	it('returns fail(400) when name exceeds 100 characters', async () => {
		const longName = 'a'.repeat(101);
		const result = await actions.default(createRequest({ name: longName }));

		expect(result.status).toBe(400);
		expect(result.data.errors.name).toBeTruthy();
		expect(mockPost).not.toHaveBeenCalled();
	});

	it('accepts name at exactly 100 characters', async () => {
		mockPost.mockResolvedValue(mockSuccess());
		const maxName = 'a'.repeat(100);

		try {
			await actions.default(createRequest({ name: maxName }));
		} catch {
			// redirect throws
		}

		expect(mockPost).toHaveBeenCalled();
	});

	it('returns fail with form error on API failure', async () => {
		mockPost.mockResolvedValue({
			data: undefined,
			error: { status: 500, message: 'Internal server error' }
		});

		const result = await actions.default(createRequest({ name: 'Smith family' }));

		expect(result.status).toBe(500);
		expect(result.data.errors.form).toBeTruthy();
	});
});