import { describe, it, expect, vi, afterEach } from 'vitest';
import { cleanup, render } from 'vitest-browser-svelte';

const mockPage = {
	url: new URL('http://localhost/documents/d1'),
	state: {}
};

vi.mock('$app/state', () => ({
	get page() {
		return mockPage;
	}
}));

vi.mock('$app/navigation', () => ({
	beforeNavigate: () => {},
	afterNavigate: () => {},
	goto: vi.fn(),
	invalidate: vi.fn(),
	invalidateAll: vi.fn(),
	preloadCode: vi.fn(),
	preloadData: vi.fn(),
	pushState: vi.fn(),
	replaceState: vi.fn(),
	disableScrollHandling: vi.fn(),
	onNavigate: () => () => {}
}));

vi.mock('$lib/shared/services/confirm.svelte', () => ({
	getConfirmService: () => ({ confirm: async () => false })
}));
vi.mock('$lib/shared/services/confirm.svelte.js', () => ({
	getConfirmService: () => ({ confirm: async () => false })
}));

const { default: DocumentDetailPage } = await import('./+page.svelte');

afterEach(cleanup);

const baseDoc = {
	id: 'd1',
	title: 'Brief an Helene',
	originalFilename: 'brief.pdf',
	documentDate: '1923-04-15',
	sender: null,
	receivers: [],
	tags: [],
	filePath: null,
	contentType: null,
	location: null,
	status: 'UPLOADED',
	fileHash: null
};

const baseData = (overrides: Record<string, unknown> = {}) => ({
	document: baseDoc,
	canWrite: false,
	canBlogWrite: false,
	user: null,
	geschichten: [],
	inferredRelationship: null,
	...overrides
});

describe('documents/[id] page', () => {
	it('renders the DocumentTopBar with the document title', async () => {
		mockPage.url = new URL('http://localhost/documents/d1');
		render(DocumentDetailPage, { props: { data: baseData() } });

		// Just verify the page mounts and renders the top bar
		const topbar = document.querySelector('[data-topbar]');
		expect(topbar).not.toBeNull();
	});

	it('renders the DocumentViewer in the page', async () => {
		mockPage.url = new URL('http://localhost/documents/d1');
		render(DocumentDetailPage, { props: { data: baseData() } });

		// DocumentViewer renders an absolute container; just check the page mounted
		const main = document.body.firstElementChild;
		expect(main).not.toBeNull();
	});

	it('persists last-visited document ID to localStorage on mount', async () => {
		localStorage.removeItem('familienarchiv.lastVisited');
		mockPage.url = new URL('http://localhost/documents/d1');
		render(DocumentDetailPage, { props: { data: baseData() } });

		await new Promise((r) => setTimeout(r, 50));

		const stored = localStorage.getItem('familienarchiv.lastVisited');
		expect(stored).toContain('d1');
	});

	it('uses doc.title as the document title when set', async () => {
		mockPage.url = new URL('http://localhost/documents/d1');
		render(DocumentDetailPage, { props: { data: baseData() } });

		// The browser <title> reflects doc.title when set
		await new Promise((r) => setTimeout(r, 30));
		expect(document.title).toContain('Brief an Helene');
	});

	it('falls back to originalFilename when title is empty', async () => {
		mockPage.url = new URL('http://localhost/documents/d2');
		render(DocumentDetailPage, {
			props: {
				data: baseData({
					document: { ...baseDoc, id: 'd2', title: '', originalFilename: 'fallback.pdf' }
				})
			}
		});

		await new Promise((r) => setTimeout(r, 30));
		expect(document.title).toContain('fallback.pdf');
	});

	it('falls back to "Dokument" when title and originalFilename are empty', async () => {
		mockPage.url = new URL('http://localhost/documents/d3');
		render(DocumentDetailPage, {
			props: {
				data: baseData({
					document: { ...baseDoc, id: 'd3', title: '', originalFilename: '' }
				})
			}
		});

		await new Promise((r) => setTimeout(r, 30));
		expect(document.title).toContain('Dokument');
	});

	it('renders without throwing when canWrite is true', async () => {
		mockPage.url = new URL('http://localhost/documents/d4');
		expect(() =>
			render(DocumentDetailPage, { props: { data: baseData({ canWrite: true }) } })
		).not.toThrow();
	});

	it('renders without throwing when geschichten and inferredRelationship are set', async () => {
		mockPage.url = new URL('http://localhost/documents/d5');
		expect(() =>
			render(DocumentDetailPage, {
				props: {
					data: baseData({
						geschichten: [{ id: 'g1', title: 'Story', publishedAt: null }],
						inferredRelationship: { label: 'PARENT_OF', from: 'p1', to: 'p2' },
						canBlogWrite: true
					})
				}
			})
		).not.toThrow();
	});

	it('renders without throwing when doc.id is empty', async () => {
		mockPage.url = new URL('http://localhost/documents/d-empty');
		expect(() =>
			render(DocumentDetailPage, {
				props: { data: baseData({ document: { ...baseDoc, id: '', title: 'No ID' } }) }
			})
		).not.toThrow();
	});

	it('renders with task=transcribe in the URL without throwing', async () => {
		mockPage.url = new URL('http://localhost/documents/d6?task=transcribe');
		expect(() =>
			render(DocumentDetailPage, {
				props: { data: baseData({ document: { ...baseDoc, id: 'd6' } }) }
			})
		).not.toThrow();
	});

	it('renders without throwing with sender/receivers populated', async () => {
		mockPage.url = new URL('http://localhost/documents/d7');
		expect(() =>
			render(DocumentDetailPage, {
				props: {
					data: baseData({
						document: {
							...baseDoc,
							id: 'd7',
							sender: { id: 's1', displayName: 'Anna Schmidt' },
							receivers: [{ id: 'r1', displayName: 'Bert Meier' }]
						}
					})
				}
			})
		).not.toThrow();
	});

	it('renders without throwing when filePath is set on the document', async () => {
		mockPage.url = new URL('http://localhost/documents/d8');
		expect(() =>
			render(DocumentDetailPage, {
				props: {
					data: baseData({
						document: {
							...baseDoc,
							id: 'd8',
							filePath: 's3://bucket/file.pdf',
							contentType: 'application/pdf'
						}
					})
				}
			})
		).not.toThrow();
	});

	it('renders without throwing with a complete user object', async () => {
		mockPage.url = new URL('http://localhost/documents/d9');
		expect(() =>
			render(DocumentDetailPage, {
				props: {
					data: baseData({
						document: { ...baseDoc, id: 'd9' },
						user: { id: 'u1', firstName: 'Anna', lastName: 'S', email: 'a@x' }
					})
				}
			})
		).not.toThrow();
	});

	it('handles Escape keydown without throwing (close transcribe path)', async () => {
		mockPage.url = new URL('http://localhost/documents/d10');
		render(DocumentDetailPage, {
			props: { data: baseData({ document: { ...baseDoc, id: 'd10' } }) }
		});

		expect(() =>
			document.dispatchEvent(new KeyboardEvent('keydown', { key: 'Escape', bubbles: true }))
		).not.toThrow();
	});

	it('handles non-Escape keydown without firing close handler', async () => {
		mockPage.url = new URL('http://localhost/documents/d11');
		render(DocumentDetailPage, {
			props: { data: baseData({ document: { ...baseDoc, id: 'd11' } }) }
		});

		expect(() =>
			document.dispatchEvent(new KeyboardEvent('keydown', { key: 'Tab', bubbles: true }))
		).not.toThrow();
	});

	it('renders without throwing with a deep-link comment query param', async () => {
		mockPage.url = new URL('http://localhost/documents/d12?comment=c-abc');
		expect(() =>
			render(DocumentDetailPage, {
				props: { data: baseData({ document: { ...baseDoc, id: 'd12' } }) }
			})
		).not.toThrow();
	});
});